Public report of nilaoda/N_m3u8DL-CLI, published 23 October 2026. It has the same score, grades and number of findings as the full report. The details of security findings (where they are in the code, which known vulnerabilities and which passwords or keys were found) are left out, so nobody can use them against the project.
Public
Executive report Measured under the Code Assurance Index, an open standard for code quality, using its published scoring rules (rubric version 2026.10.5). Watchdog signed this survey and filed it in the standard's public register, where anyone can look it up by its survey ID. Check this survey → Signed and filed in the standard's public register, 23 October 2026, 06:37 UTC · Survey ID cd_ce19b71127f74ddbb1a69301bbf8616e

nilaoda/N_m3u8DL-CLI

Measured 23 October 2026, 06:33 UTC, at code version 985f6e5

A regression is a drop of 0.5 points or more in the score, or of 2.5 or more out of 10 in a dimension, since the last survey.

Test distribution is not measured: No automated tests.

Supply-chain provenance & signing is not measured: Supply-chain provenance is not scored (this pipeline releases no artifact), but its build steps or GitHub Actions workflows have integrity defects, or nothing watches its dependency set for published advisories.

CAI score 35out of 100 Weak
CriticalWeakAdequateStrongExemplary
Up 1 since the last survey

The score is built from these lenses. Each lens grades one area of the code, such as how easy it is to change or how well it is protected. The weakest lens counts most, so one weak area pulls the score down instead of being averaged away.

A small codebase: 7,180 lines of product code in 1 project, tests not counted · Estimated rebuild effort: about 0.5 person-years · Weakest lens: Maturity, 22

Findings by how serious they are

28 critical 104 serious 68 minor

5 dimensions are left out of the score. For each one, Watchdog either couldn't measure it in this code, or found no evidence of the safeguard it looks for, such as a tested backup restore. They count neither for nor against the score, and Limitations lists each one with its reason.

This survey was produced by

Watchdog
Producer
Canine Development
Analyzer
Watchdog engine 1.0.0
Measured
23 October 2026, 06:33 UTC

A measurement, not a certificate. The Code Assurance Index records a number together with the evidence it was worked out from, so anyone can recalculate it, but it doesn't certify or guarantee the code. The standard was written by Canine Development, which also builds Watchdog. It is open to any tool that implements it, and today Watchdog is the only one that does.

The score is deterministic, which means the same code always gets the same score. Watchdog works it out with tools that follow published rules, and an AI model never decides it, so anyone who applies the same rules to the same code gets the same number. How it is done is explained under Methodology ▸

60of 64 dimensions measured by tools. The other 4 are advisory notes from an AI model, which explain the code but don't count towards the score.
184of 200 findings point to an exact file and line, so you can open each one in the code. The other 16 concern the repository as a whole, such as missing documentation.
64dimensions across 6 lenses, read from 7,180 lines of product code in 1 project.
Chapters

Executive summary

nilaoda/N_m3u8DL-CLI scores 35 out of 100 and is rated Weak, while two of its six lenses score higher still: Architecture and Performance at 100, both rated Exemplary.

The score is lower than those two because the weakest lens counts most, and here that is Maturity, which scores 22 and is rated Critical. The project has no recorded design decisions and no architecture document, so its Churn × Complexity Hotspots dimension scores 0 out of 10, and until that reaches 4, Maturity can't be rated higher than Adequate. The README also doesn't say how to run the tests. Resolving the orphaned knowledge and hotspot findings are therefore the first actions, and if Maturity rose to 70, the score would rise from 35 to about 45.

Twenty-eight findings are critical: fifteen empty catch blocks in the code, six orphaned knowledge items, four mutable action tags in GitHub Actions, one unsafe process argument interpolation, one absence of automated tests, and one disabled TLS certificate validation.

Watchdog couldn't measure dependency hygiene, IL efficiency, or platform end-of-life, because the analyzer's build of the target did not succeed for IL and the repository declares no platform for end-of-life assessment. The product code is 7,180 lines, which would take an estimated 0.5 person-years, around €77,000, to rebuild.

A lens is capped at Adequate while one of its dimensions scores below 4 out of 10, however well the rest of the lens does. That way a serious problem in one place always shows in the lens's rating.

How the score is built: what each lens counts for The lenses don't count equally. The weakest lens counts most, the next weakest a little less, and so on, so a weak area pulls the score down instead of being averaged away. In the bar below, each part's width shows how much that lens counts and its colour shows its rating. Improving the widest part moves the score most, and as that lens improves, it counts for less, because another lens becomes the weakest.
Maturity 22 · counts for 46%Production Readiness 28 · counts for 25%Security and Compliance 50 · counts for 14%Code Health 56 · counts for 8%Architecture 100 · counts for 4%Performance 100 · counts for 2%

If Maturity rose from 22 to 70, the lowest score rated Strong, the score would rise from 35 to about 45.

Code composition: what the lines of code are
Business logic 62%Supporting code 27%Generated by tools 11%
New since the last survey: 4 findings

These 4 critical or serious findings weren't in the previous survey, on 9 October 2026.

Watchdog compares every finding with the previous survey's. A finding that has only moved to another line in the same file counts as the same finding, so only new findings appear here. Advisory notes from the AI model are left out, because the model words them afresh in every survey.

Fixed since the last survey: 8 findings

These 8 critical or serious findings were in the previous survey, on 9 October 2026, and are gone from this one.

  • Supply-chain Provenance & Signing REDACTED
  • Cancellation propagation · Async method without CancellationToken: EncryptStreamAsync N_m3u8DL-CLI/CSChaCha20.cs
  • Cancellation propagation · Async method without CancellationToken: DecryptStreamAsync N_m3u8DL-CLI/CSChaCha20.cs
  • Exception handling · Swallowed exception (caught, then discarded) N_m3u8DL-CLI/Global.cs
  • Exception handling · Swallowed exception (caught, then discarded) N_m3u8DL-CLI/Global.cs
  • Exception handling · Swallowed exception (caught, then discarded) REDACTED
  • Exception handling · Swallowed exception (caught, then discarded) REDACTED
  • Exception handling · Swallowed exception (caught, then discarded) REDACTED
Rebuild cost: about €77,000 · Estimate
Cost to rebuild€25,000 to €130,000, for 413 to 1,361 hours of work, about 0.5 person-years for 1 to 2 engineers
Difficulty of the problemStandard, judged from the kind of software and how it is built. Code that solves a harder problem, such as payments or medical bookings, costs more per line to write.
Quality factor×0.7 at a score of 35. Better code takes more work to write, so the factor is ×1.0 at a score of 70, lower below it and higher above it.
SizeSmall: 7,180 lines of product code
Comment linesThe estimate prices 6,502 lines. Comment lines count towards the size of 7,180 lines but aren't priced as work.

How the estimate is made: Watchdog prices the hours a team would need to write this code again, at €60 to €95 an hour. Declarations and boilerplate are priced at a fast rate and logic at a slower one, and the logic is then multiplied by the difficulty of the problem and by the quality factor. The estimate can be about 30% off either way, and it moves most with the hourly rate and the difficulty.

Top priorities

The three actions that raise the score most for the work they take. The full ranked list is in the Roadmap.

1
Resolve the 6 Orphaned knowledge finding(s) in Knowledge Freshness — start with Global.cs, Parser.cs, REDACTED.
Raises the score by about 6 points · Low effort · Knowledge Freshness
2
Resolve the 1 Hotspot finding(s) in Churn × Complexity Hotspots — start with Parser.cs.
Raises the score by about 11 points · Medium effort · Churn × Complexity Hotspots
3
Resolve the 1 No automated tests finding(s) in Code Coverage.
Raises the score by about 8 points · Low effort · Code Coverage

Diagnosis: what the measurements show together

Each conclusion below combines several dimensions into one point that no single dimension shows, and lists the measurements it rests on.

Where the investment is most exposed · Value at risk
This code would cost about €77,000 to build again, about 0.5 person-years of work. Its weakest lens is Maturity, at 22 (Critical). Maturity is about how well the project explains and looks after itself, which decides whether a new developer, or a new supplier, can take over. Because the weakest lens counts most in the score, work on Maturity also moves the score most.
Based on: the rebuild estimate · the Maturity grade · how much each lens counts
What to do: Start with the Maturity actions in Top priorities.
If you do one thing first · First action
Resolve the 6 Orphaned knowledge finding(s) in Knowledge Freshness. Of all the actions in this report, it raises the score most for the work it takes: about 6 points for low effort, because it clears the 6 Knowledge Freshness findings. The next survey will show the change in the score.
Based on: the ranked actions in Top priorities, by score gain and effort
What hard-to-read code costs each year · Cost
Four dimensions measure how easy the code is to work in: two measure how tangled its logic is, one how much of it is copied, and one how well each part sticks to a single job. In this codebase they average 5.8 out of 10. Code at that level is slower to change than clean code, and Watchdog estimates the extra work at 6% to 12% on every change.
How this is estimated: It rests on an assumption of Watchdog's own: code scoring 8 out of 10 or more adds no extra work, and each point below 8 adds 2.5% to 5.6% to every change. The result is a range for planning, not a measurement.
Based on: Cyclomatic Complexity · Cognitive Complexity · Code Duplication · Cohesion (LCOM4)
What to do: Start with the files listed under Churn × Complexity Hotspots, which change often and are hard to read, because that is where the extra work is paid most often.

Architecture: which parts of the code depend on which

The code is divided into modules, groups of code that each handle one part of the product, and a module depends on another when it uses code from it. The table lists the modules both down the side and across the top, in an order where each module should only use modules listed above it. A number in a cell means the module on that row uses the module in that column, and it counts the pairs of building blocks (types) that connect them. The one thing to look for is a mark above the diagonal line. It means two or more modules use each other in a loop (a dependency cycle), so none of them can be changed, tested or released on its own.

3 modules, with 1 dependency between them. Every module uses only modules listed above it, so there are no loops.

Which modules use which. The module on each row uses the module in each column, and the number counts the pairs of types that connect them. A cell above the diagonal is part of a loop.
uses →1 CSChaCha202 N_m3u8DL_CLI3 N_m3u8DL_CLI.NetCore
1 CSChaCha20
2 N_m3u8DL_CLI
3 N_m3u8DL_CLI.NetCore1
Uses a module listed above itPart of a loopThe module itself
1 CSChaCha202 N_m3u8DL_CLI3 N_m3u8DL_CLI.NetCoreCSChaCha201N_m3u8DL_CLI2N_m3u8DL_CLI.NetCore31

At a glance — Code Health · 56% · Adequate · gated by D1, D2, X3 ·

At a glance — Architecture · 100% · Exemplary ·

At a glance — Maturity · 22% · Critical · gated by D15, D34, M2 ·

At a glance — Readiness · 28% · Weak · gated by D8, D9, P2, P3 ·

At a glance — Security · 50% · Adequate · gated by S1 ·

At a glance — Performance · 100% · Exemplary ·

Security & Compliance — OWASP Top-10 mapping

Findings mapped to OWASP categories; the specific CVEs/secrets are in the Security dimension cards below and findings.md (redacted only on the public version of this report).

OWASP categoryFindingsSeverity
A05:2025 — Injection9High / Critical

Roadmap

Begin by resolving the critical complexity hotspot in Parser.cs to immediately reduce churn risk. Next, address the eleven orphaned files, prioritizing Decode51CtoKey.cs, Downloader.cs, and FFmpeg.cs, to restore knowledge freshness. Finally, establish foundational quality practices by adding automated tests for uncovered code and documenting architectural decisions through ADRs.

Ranked by impact ÷ effort. "Helps" is the estimated gain on the 0–100 health score.

Do thisHelpsEffortDimension
Resolve the 6 Orphaned knowledge finding(s) in Knowledge Freshness — start with Global.cs, Parser.cs, REDACTED.+5.5 ptsLowKnowledge Freshness
Resolve the 1 Hotspot finding(s) in Churn × Complexity Hotspots — start with Parser.cs.+10.6 ptsMediumChurn × Complexity Hotspots
Resolve the 1 No automated tests finding(s) in Code Coverage.+8.2 ptsLowCode Coverage
Resolve the 1 No tests found finding(s) in Test Distribution.+8.2 ptsLowTest Distribution
Resolve the 1 No ADRs found finding(s) in ADR Quality.+7.6 ptsLowADR Quality
Resolve the 11 Orphaned file finding(s) in Knowledge Freshness — start with Decode51CtoKey.cs, Downloader.cs, FFmpeg.cs.+8.9 ptsMediumKnowledge Freshness
Record your significant design decisions. Write one short document per decision, giving its date, the situation, the decision and its consequences, and keep them together with your other design documents. A docs/adr folder with each file named by number and title is the easiest place to find them.+7.0 ptsMediumArchitecture documentation
Resolve the 15 EmptyCatchBlock finding(s) in Explicit Debt — start with DownloadManager.cs (6), Global.cs (4), LOGGER.cs (3).+2.1 ptsMediumExplicit Debt

File quality

Per-file score 0–10 — a quality signature. Of 16 files carrying findings, judged against the Production bar: 31% slop · 44% mixed · 25% near-clean.

FileScoreBandWorst signal
REDACTED1.1SlopStatic Analysis (SAST): High: REDACTED
N_m3u8DL-CLI/Parser.cs1.3SlopExplicit Debt: EmptyCatchBlock
REDACTED2.2SlopStatic Analysis (SAST): High: REDACTED
N_m3u8DL-CLI/DownloadManager.cs2.3SlopExplicit Debt: EmptyCatchBlock
N_m3u8DL-CLI/Global.cs2.5SlopExplicit Debt: EmptyCatchBlock
REDACTED4.9MixedStatic Analysis (SAST): Medium: REDACTED
N_m3u8DL-CLI/LOGGER.cs5.8MixedExplicit Debt: EmptyCatchBlock
N_m3u8DL-CLI/Downloader.cs6.0MixedExplicit Debt: CommentedOutCode
N_m3u8DL-CLI/ProgressReporter.cs7.6MixedExplicit Debt: EmptyCatchBlock
N_m3u8DL-CLI/FFmpeg.cs7.8MixedCyclomatic Complexity: FFmpeg.Merge (cyclomatic 27)
N_m3u8DL-CLI/CSChaCha20.cs7.8MixedCognitive Complexity: ChaCha20.WorkBytes (cognitive 20)
N_m3u8DL-CLI/IqJsonParser.cs7.8MixedCode Duplication: Duplicated block (12 lines × 2)
N_m3u8DL-CLI/HLSLiveDownloader.cs8.2Near-cleanExplicit Debt: CommentedOutCode
N_m3u8DL-CLI/Watcher.cs8.5Near-cleanCode Duplication: Duplicated block (14 lines × 3)
N_m3u8DL-CLI/Decrypter.cs8.5Near-cleanCode Duplication: Duplicated block (12 lines × 2)
N_m3u8DL-CLI/Decode51CtoKey.cs8.5Near-cleanCode Duplication: Duplicated block (8 lines × 2)

How the grades work

Every finding carries one of four grades. Three say how serious it is. The fourth says this survey could not settle it — and it is a grade, not a gap.

Critical — 28

A definite problem that already costs you something and drags the score down: a missing authorisation check, a dependency with a known exploit, a build that does not reproduce. Failure here tends to cause failures elsewhere.

Serious — 104

Likely wrong, but not failing yet. It degrades the codebase over a longer horizon and can cause failures elsewhere — not urgent this week, not something to carry for two years either.

Minor — 68

Recorded, with no effect on how the codebase functions. Present so the survey is complete, not because it needs doing.

Could not be resolved — 5

Something this survey could not settle from the outside, and which could be critical or serious. Either a control was required and no positive evidence of it exists in the repository — a backup job that nothing shows was ever restored from proves nothing about restores — or our own analysis could not run over that part of the tree. This is not a clean result. These are excluded from the score rather than awarded a pass, so the number on the cover neither rewards nor penalises them: if you act on this survey without resolving them, you carry that risk yourself. Each one is named under Limitations.

Methodology & how to trust this report

Watchdog is a deep, periodic assessment — run each sprint, monthly, or quarterly, taking the time to go wider and deeper than a quick check and surfacing in one coherent report what you'd otherwise piece together from a dozen separate tools. It scores deterministically: the same commit yields the same score, every run. 60 of 64 evaluated dimensions are computed purely by tools and static analysis (confidence 1.0); 4 documentation/naming judgement(s) are LLM-assisted and labelled advisory. Overall confidence is 0.9 — the weighted average across measured dimensions; it falls as more of the score leans on LLM-assisted judgement and rises when it's fully tool-backed.

Every figure here is one of three kinds, and we label which: ✓ Measured — a deterministic fact (LoC, complexity, coverage); ~ Modeled — an estimate from a stated model (cost, effort, value-at-risk), always a range with its assumptions, never a precise fact; ◐ Advisory — an LLM prose judgement. We never present a modelled estimate as if it were measured. Perfect or absent scores carry their provenance too (ADR-0011): ✓ Tool-verified means the property itself was measured across the surface; ○ Nothing flagged means the probes came back clean — a claim bounded by what a repository can show; ⊘ Not evidenced means a working control (a tested restore, an automated rollback) showed no positive evidence — absence of evidence is not evidence of a control, so it's excluded from the score rather than awarded a spurious 10; ◐ Sampled · advisory marks an LLM verdict over a bounded sample — advisory, never a deterministic measurement.

What we checked — 64 dimensions across the health lenses
D1D2D3D4D5D6D8D9D13D14D15D17D18D19D20D21D24D26D28D29D30D34D35D43AX10AX3AX4AX5GD1IC1M1M2M3M4P1P2P3P6PF3S1X1X12X13X14X15X16X17X18X19X2X20X21X22X23X24X25X26X27X28X29X3X30X32X4

Each chip is a dimension scored from real signals across architecture, testing, dependencies, security & compliance, documentation, git-history and code quality — in one coherent pass. A surface report typically covers a handful.

How to trust any code-health report — three questions
  1. Can you open the finding? Real findings cite a repo-relative file and line you can open at the cited line — never an absolute scratch path. Here, 184 of 200 do; the remainder are repo-wide signals — a dimension-level measurement, not a single line. (Every path in this report is repo-relative by construction: paths are normalized at the producer and the report is rejected if any rooted path leaks through.)
  2. Is there a tool behind the number? Every score below names the method that produced it — Roslyn, git, a scanner, or (for a handful of documentation/naming dimensions) an LLM labelled sampled · advisory — not a narrative.
  3. Does re-running give the same result? Run it again on the same commit and the score — and this report, byte for byte — is identical. A report whose numbers move between runs is describing the run, not the code.

This report answers yes to all three. That's the bar to hold any assessment to.

Tools & methods

The actual versions used this run (captured at analysis time) — re-run on the same commit for the identical score.

MethodBacksVersionEvaluator
Roslyn static analysisComplexity, cohesion, coupling, dead code, API surface, layering5.3.0✓ deterministic
Native secret scannerHardcoded secrets / credentials1.0.0✓ deterministic
Watchdog duplication detector (in-process)Code duplication1.0.0✓ deterministic
Coverage (coverlet / dotnet-coverage)Line & branch coverage10.0.400✓ deterministic
NuGet / dotnetOutdated, vulnerable & deprecated dependencies10.0.400✓ deterministic
git / LibGit2SharpChurn hotspots, knowledge concentration, history2.43.0 · 0.31.0✓ deterministic
gitleaks · semgrep · trivySecrets in history, SAST, CVEs, IaC & container, PII / GDPR1.86.0 · 0.69.3✓ deterministic
LLM (sampled · advisory)Documentation quality, ADR conformance, naming — sampled over a bounded sample; advisory, never a deterministic measurementLocal LLM◐ LLM · sampled · advisory

Every finding is locatable in findings.md. Run 01a16777-3cd9-7124-99a4-af3299988d00.

The exact command behind every deep-scan dimension — tool, version, invocation and retained raw output — is in Appendix B — Reproduction & audit trail.

Run transparency — what happened this run

What ran differently this time — a tool absent, degraded, or that fell back to an estimate. Named openly, not folded silently into the scores. A degraded run also records its exact cause in diagnostics.md.

  • D12 Dependency Hygiene — not measured this run — Watchdog could not measure this here. That is a gap on our side — a collector, parser or image we have not built yet — and it is neither a defect in this repository nor evidence that the check would have passed. `dotnet list package` did not return usable output (restore or query failed); no outdated/vulnerable/deprecated data to assess. The tool said: `dotnet list package` exited 1 with no output.
  • D16 Bus Factor — not measured this run — This is a true statement about the repository that carries nothing for its owner to act on, so it is reported here rather than as a defect in their code. Single-maintainer repository — bus factor is not applicable (10 contributor(s) across 367 commit(s) sampled, automation and bot accounts excluded). One of them holds 96% of the history; the other 9 hold 0.4% each on average, below the 5% at which there is somebody to hand the work to. That is a single maintainer with drive-by contributors, not a team whose knowledge has concentrated — so the bus factor is not applicable and there is nothing here for the owner to act on.
  • D17 Explicit Debt — measured, with a gap in what it reached — Watchdog measured this, but not all of it. What it did not reach is a gap on our side — a collector, parser or image we have not built yet — so the numbers on that dimension cover less than the repository, and the part left out is not evidence that it would have passed. The C# workspace loaded this repository's projects but reported a load failure, and the dead-code reference search is unreliable over a graph that did not load cleanly, so it was skipped. The other debt markers on this row were read; dead symbols were not, and their absence from the score is not a finding that the code has none. First load diagnostic: Failure: Msbuild failed when processing the file 'N_m3u8DL-CLI/N_m3u8DL-CLI.csproj' with message: 这台计算机上缺少此项目引用的 NuGet 程序包。使用“NuGet 程序包还原”可下载这些程序包。有关更多信息,请参见 http://go.microsoft.com/fwlink/?LinkID=322105。缺少的文件是 ..\packages\Resource.Embedder.2.1.1\build\Resource.Embedder.props。.
  • D18 Solution Shape — measured, with a gap in what it reached — Watchdog measured this, but not all of it. What it did not reach is a gap on our side — a collector, parser or image we have not built yet — so the numbers on that dimension cover less than the repository, and the part left out is not evidence that it would have passed. `dotnet build` reported 1 error(s). None of them is a .NET compiler diagnostic, which is the only signal this check reads as "the code does not compile", so the failure is recorded as a build-environment gap rather than a code defect. The usual causes are a project that targets a platform this run cannot build (a Windows-only target framework on a Linux worker) or a build step that shells out to a tool the image does not carry. Solution Shape is scored on structure and is NOT capped. Semantic analysis is independent of this build and covers every project that loaded — but a project whose restore did not complete has no resolved references, so treat its results as absent rather than clean. ★ The reach of that test, stated so this classification can be checked rather than taken on trust: it reads the C# (CS), Visual Basic (BC) and F# (FS) compiler series, and treats SDK, NuGet-restore and MSBuild codes (NETSDK, NU, MSB) as evidence that the build did not run rather than that the code is broken — read the diagnostics named above and judge for yourself. You can widen what we reach: if this build is meant to run off its own platform, without host tooling we do not carry, the diagnostics named above are what stopped it. If it is deliberately platform-bound — a Windows-only desktop product, say — there is nothing to do here: the note records our reach, not a defect in your build.
  • D22 Internal API Consistency — not measured this run — This is a true statement about the repository that carries nothing for its owner to act on, so it is reported here rather than as a defect in their code. The loaded project set declares no packable project and no `.Contracts` project, so there is no intentionally-exposed surface for API consistency to be judged over.
  • D28 Secrets (history) — measured, with a gap in what it reached — Watchdog measured this, but not all of it. What it did not reach is a gap on our side — a collector, parser or image we have not built yet — so the numbers on that dimension cover less than the repository, and the part left out is not evidence that it would have passed. D28's config-credential rule (WD-SECRET-0002) parses each committed `.json` config as a document and reads credential-named values; `docs/search_index.json` did not parse (JSON5, a template, several concatenated documents), so a credential bound there is UNMEASURED by that rule. gitleaks still scanned the same files as text.
  • D30 Dependency Vulnerabilities — measured, with a gap in what it reached — This is a true statement about the repository that carries nothing for its owner to act on, so it is reported here rather than as a defect in their code. `dotnet list package --vulnerable` could not read this solution's dependency graph — it reported an error for at least one project and returned no package data at all (typically a packages.config / non-PackageReference project, which the command cannot read). An unreadable dependency graph is not a clean one; migrate the project(s) to PackageReference to enable this scan. 1 of 2 declared ecosystem(s) (nuget packages.config) WERE scanned and every vulnerability they reported is included in this result; nuget was not, so this dimension's score covers less than the dependency surface this repository declares, and nothing here is evidence that nuget is free of known-vulnerable dependencies.
  • D39 IL Efficiency — not measured this run — Watchdog could not measure this here. That is a gap on our side — a collector, parser or image we have not built yet — and it is neither a defect in this repository nor evidence that the check would have passed. IL NOT MEASURED: the analyzer's own build of this repository failed for an ENVIRONMENT reason (exit 1) — MSBuild's engine or the CLR gave up, or our image does not carry the SDK band/targeting pack this repository needs. This is OUR limitation, not a defect in the repo, and it is not a statement that this repository fails to build. D18 owns the question of whether this repository builds; it was not answered here.
  • D44 Platform End-of-Life — not measured this run — Watchdog could not measure this here. That is a gap on our side — a collector, parser or image we have not built yet — and it is neither a defect in this repository nor evidence that the check would have passed. This dimension reads a project's own statement about the platform it runs on: a TargetFramework in a .NET project file, a .nvmrc or .python-version, a capped requires-python, a Rust toolchain file or Cargo.toml rust-version, a .go-version, .java-version, .ruby-version, .tool-versions or .sdkmanrc, a go.mod go directive, a Maven or Gradle Java level or toolchain, a Gemfile's ruby directive, a mix.exs elixir requirement, a rebar.config minimum_otp_vsn, a pubspec.yaml SDK constraint, a build.sbt scalaVersion, or a framework major pinned by a dependency constraint. This repository carries none of them, so nothing about its platform was established. That is a gap in this analyzer's coverage, NOT a finding that the platform is supported — a language whose runtime is declared elsewhere (Package.swift, a Dockerfile) is simply not read here yet.
  • IC1 Incompleteness & stubs — measured, with a gap in what it reached — Watchdog measured this, but not all of it. What it did not reach is a gap on our side — a collector, parser or image we have not built yet — so the numbers on that dimension cover less than the repository, and the part left out is not evidence that it would have passed. 4 further occurrence(s) are not listed individually; the score already reflects all 44.
  • P1 CI/CD gates — measured, with a gap in what it reached — Watchdog measured this, but not all of it. What it did not reach is a gap on our side — a collector, parser or image we have not built yet — so the numbers on that dimension cover less than the repository, and the part left out is not evidence that it would have passed. A CI pipeline exists and the word "test" appears, but no explicit test-runner invocation (your stack's test command, or a test job) was matched — so either the gate runs tests through a step this pass could not recognise, or "test" is incidental here (a path, "latest", a reporter). Which of the two it is cannot be settled from this dimension's evidence; the coverage dimensions report whether a suite exists at all. You can widen what we reach: name the test runner explicitly in the pipeline step (your stack's test command, or a job named for the suite) so the gate is unambiguous to a reader and to this pass.
  • P5 DR & Backup — not measured this run — This is a true statement about the repository that carries nothing for its owner to act on, so it is reported here rather than as a defect in their code. No backup/snapshot/replication config, RTO/RPO or restore-procedure documentation was found — and no production persistence was detected either (no data-access packages, no data-store services, no database resources), so there is nothing in this repository whose loss a DR control would recover. If this system's data lives in a platform or ops repo we can't see, that's where the DR evidence belongs.

Repo exclusion declarations (.gitattributes linguist-generated/vendored, .editorconfig generated_code): none declared — every source file was scored.

Limitations & what we did not check

Watchdog assesses the repository exactly as committed, and only the repository. By design it does not reach outside the source tree: the live cloud account, the running CI/CD pipeline, the host's branch-protection and approval rules, the production configuration, or a restore actually exercised against a backup are all out of scope. That boundary is a feature, not a gap — a repo-relative, deterministic scan re-runs identically on any commit and every finding opens at a real file and line, where a live audit can neither be reproduced nor traced. The visible consequence is that controls which leave no in-repo evidence are reported as "not evidenced" and excluded from the score rather than awarded a number a static scan cannot justify.

Per-dimension blind spots

For each dimension that was measured, what a static, repo-only scan structurally cannot see — the honest edge of the measurement, not a failure of it.

  • D1 Cyclomatic Complexity: Cyclomatic complexity counts branches statically — it cannot tell an essential decision tree from accidental tangle, nor see complexity that lives in data or configuration (large switch-case token tables, DSL lexers/parsers, data-as-code rule tables) rather than control flow: a tokenizer's many single-character cases read as high complexity though each branch is trivial.
  • D2 Cognitive Complexity: Cognitive-complexity heuristics approximate how hard code is to follow; genuine domain difficulty and well-named intent that eases reading are not captured.
  • D3 God Classes: "God class" is sized by members and responsibilities visible in the type — a deliberately broad facade over a coherent subsystem can read the same as an accidental grab-bag. For front-end JS the file-length check is cohesion-aware (a single-responsibility module — one class/IIFE — earns a 3× threshold), but cohesion is approximated from top-level declarations, not true dependency structure.
  • D4 Code Duplication: Duplication is token-similarity — an in-process token-stream comparison over sliding windows, with type-aware normalization — so it finds copy-paste, not semantic duplication expressed differently. Committed machine-written code (scaffolded migrations, designer/codegen output, protobuf/OpenAPI stubs, model snapshots) is EXCLUDED — its repetition is the tool's, not the team's — so the score reflects hand-written duplication only.
  • D5 Coupling: Coupling is measured between projects/assemblies — runtime coupling through DI, reflection, messaging or shared databases is invisible to a static reference graph.
  • D6 Cohesion (LCOM4): LCOM4 cohesion is syntactic — it infers connectivity from which methods touch which fields/methods by name, not from real runtime behaviour or intent.
  • D8 Code Coverage: Coverage is measured by building and running the test suite inside Watchdog's isolated image — the target repo is never modified, and nothing on your systems runs. So coverage exists only when the suite builds and runs within the inline time budget; one that needs external services, can't build, or exceeds the budget yields no coverage (D8 then degrades to not-measured, not a low score). Line coverage also says nothing about assertion quality.
  • D9 Test Distribution: The test-pyramid shape is inferred from project/folder naming and references, with a single test host bucketed per-file by its path tier and content signals — a suite that names tiers unconventionally and gives no per-file signal can still be mis-bucketed.
  • D13 Secret Scanning: Secret detection is signature- and entropy-based on the current tree — a secret that does not match a known pattern, or one already rotated, will not be flagged (a clean scan is "nothing matched", not "no secrets exist").
  • D14 License Compliance: License compatibility is checked against declared package metadata and a policy — mislabelled or missing license metadata, and obligations that depend on how you distribute, are not resolved here.
  • D15 Churn × Complexity Hotspots: Churn hotspots come from git history — a freshly imported or squashed repository has no churn signal, and recent rewrites can mask a historically risky file.
  • D17 Explicit Debt: Acknowledged-debt signals (TODO/FIXME, suppressions, dead code) are textual — undocumented debt that nobody marked, and debt that lives in design rather than annotations, is invisible. Committed machine-written code (scaffolded migrations, designer/codegen output, generated stubs) is excluded — it is never the team's dead code to delete.
  • D18 Solution Shape: Build integrity reflects whether the solution compiled in this environment — a build that needs a private feed, a specific SDK, or a generated file absent from the repo can read as broken when it is merely unreproducible here.
  • D19 Documentation Quality: Documentation quality is judged by an LLM over a bounded sample of docs — it reads what is written, not whether the docs match the running system, and it is advisory, not a measurement. Its critique rows are drawn from a closed category vocabulary and each row means the same thing in every run, so two scans can be compared row by row; the SET that fires is still a sample, and does not repeat exactly. Measured on one frozen input, six scans at one engine SHA: 2-5 critique rows per scan, 8 distinct rows across the six, 3 of those 8 seen in only one scan. So a D19 row is evidence about the documentation, but a COUNT of D19 rows is not a quantity — never read a change in it as an improvement or a regression.
  • D20 ADR Quality: ADR quality is an LLM read of the decision records present — it cannot know about decisions made and never recorded, and its verdict is sampled and advisory.
  • D21 Naming Consistency: Naming quality is an LLM judgement over a bounded sample — it assesses clarity/consistency of the names it sees, not domain-correctness, and is advisory.
  • D24 Comment Value: Comment value (WHY vs WHAT) is an LLM judgement over a bounded sample — it is advisory and cannot weigh a comment against the precise code change it was written to explain.
  • D26 Project Cohesion: Project focus is sized from members/namespaces per project — a project that is broad by deliberate design reads the same as one that has sprawled.
  • D28 Secrets (history): Secret-history scanning sweeps the git log for known patterns — a secret that predates the available history, or never matched a signature, is not found (clean means "nothing matched in the history we can see").
  • D29 Static Analysis (SAST): SAST findings are pattern-based (semgrep) — it finds classes of bug it has rules for; logic flaws, auth/authorization gaps and issues needing runtime context are out of reach (and clean means "no rule matched").
  • D30 Dependency Vulnerabilities: CVE matching depends on accurate package/version metadata and on the advisory databases — a vulnerability with no published advisory, or in code not declared as a dependency, is not seen. Coverage needs a RESOLVED graph: an unpinned requirements.txt, or a pom without a resolved build, yields partial coverage rather than a clean verdict. An ecosystem the analyzer cannot scan is reported as unmeasured, never as clean.
  • D34 Knowledge Freshness: Freshness is decayed commit RECENCY, not comprehension — code read often but rarely committed reads as orphaned, and stable code that genuinely needs no changes is penalised the same as forgotten code; bot/squash commits distort it like the bus factor.
  • D35 Change Coupling: Change coupling is co-change in COMMITS — files split across separate commits, or coupled only through a shared config/build step, read as uncoupled, and a sweeping commit (rename/format) is excluded so it doesn't couple everything. It shows that files change together, not WHY: a high coupling can be a healthy cohesive pair as readily as a hidden leak.
  • D43 Malicious Dependencies: Only packages some vulnerability database has already NAMED as malicious are seen — a compromise published in the last hours, or never reported at all, is invisible here, and this dimension reading 10 is not evidence that a dependency is trustworthy. There is no typosquat or dependency-confusion analysis: a package nobody has reported is simply absent from the feeds. Coverage is the dependency scan's: an ecosystem that could not be scanned is disclosed as unmeasured, never as clean.
  • AX10 Code composition: Role is inferred from namespace/folder convention, not semantics — a domain concept living in a folder named "Services" reads as application, and the split is lines-of-code, not business value. The business-logic-share score is a SOFT, FLOORED signal: it contributes to the Architecture lens but is floored at the Critical gate, so an infrastructure-heavy design (a gateway, an ETL, a driver) is legitimately low without being nuked to zero.
  • M4 Documentation accuracy: Onboarding quality is an LLM read of the docs/setup present — it cannot run the onboarding or measure how long a real new joiner takes; the verdict is sampled and advisory.
  • P6 Release Hygiene: Rollback/observability controls are inferred from repo artefacts (pipelines, dashboards-as-code) — controls configured in external tooling, with no in-repo trace, cannot be credited.

The LLM boundary

LLM-set scores this run (4): D19, D21, D24, M4 (model: Local LLM). For these, a model reads a bounded sample and sets the numeric score; each names its own sample and method on its card. They are sampled and advisory by design: they vary at the margins between runs and are never a deterministic measurement. Every other score in this report is tool-computed at confidence 1.0.

Dimensions

D1 · Cyclomatic Complexity2.0 / 10Critical✓ Tool-verified

What it measures: How tangled the control flow is — methods with many branches are hard to test and change.

Method: Cyclomatic complexity per method (1 + decision points), computed exhaustively across production source; test projects separated by convention. Deterministic.

Maturity: Documented → Verified → Prevented · effective 2.0 / 10 · rule-coverage 100% · ceiling Prevented

15 method(s) exceeded the cyclomatic complexity threshold of 15; the worst was Parser.Parse at 160.

Parser.Parse (cyclomatic 160)N_m3u8DL-CLI/Parser.cs:74
MPDParser.Parse (cyclomatic 93)REDACTED:130
Global.HttpDownloadFile (cyclomatic 52)N_m3u8DL-CLI/Global.cs:592
Program.DoWork (cyclomatic 48)REDACTED:200
DownloadManager.IsComplete (cyclomatic 46)N_m3u8DL-CLI/DownloadManager.cs:322

+ 10 more group(s) — more in Appendix A; the complete list is findings.md.

What to do

  1. Bring the 2 bodies over 60 down to 60 or less in Cyclomatic Complexity — start with Parser.Parse (cyclomatic 160), MPDParser.Parse (cyclomatic 93). — This score is capped by its worst body, so a finding fixed alone moves it by almost nothing — the next one down takes its place. Refactoring these 2 together lifts Cyclomatic Complexity from 2.0 to about 4.1/10, projected with the scoring formula itself and assuming each lands exactly at 60; a cleaner split scores higher.
  2. Enforce Cyclomatic Complexity in CI to reach Verified (currently Documented). — Hardens enforcement from Documented toward Prevented — provenance only; does not change the score.

Detailed fixes: d1_recommendation.md · top locations in Appendix A, every location in findings.md.

D2 · Cognitive Complexity2.0 / 10Critical✓ Tool-verified

What it measures: How hard the code is for a person to follow, beyond raw branching.

Method: Cognitive complexity per method (Sonar-style nesting-penalized score), computed exhaustively over production code, excluding test projects. Deterministic.

Maturity: Documented → Verified → Prevented · effective 2.0 / 10 · rule-coverage 100% · ceiling Prevented

16 method(s) exceeded the cognitive complexity threshold of 15; the worst was MPDParser.Parse at 363.

MPDParser.Parse (cognitive 363)REDACTED:130
Parser.Parse (cognitive 276)N_m3u8DL-CLI/Parser.cs:74
DownloadManager.IsComplete (cognitive 168)N_m3u8DL-CLI/DownloadManager.cs:322
Program.DoWork (cognitive 74)REDACTED:200
DownloadManager.DoDownload (cognitive 68)N_m3u8DL-CLI/DownloadManager.cs:92

+ 11 more group(s) — more in Appendix A; the complete list is findings.md.

What to do

  1. Bring the 16 bodies over 15 down to 15 or less in Cognitive Complexity — start with MPDParser.Parse (cognitive 363), Parser.Parse (cognitive 276), DownloadManager.IsComplete (cognitive 168). — This score is capped by its worst body, so a finding fixed alone moves it by almost nothing — the next one down takes its place. Refactoring these 16 together lifts Cognitive Complexity from 2.0 to about 10.0/10, projected with the scoring formula itself and assuming each lands exactly at 15.
  2. Enforce Cognitive Complexity in CI to reach Verified (currently Documented). — Hardens enforcement from Documented toward Prevented — provenance only; does not change the score.

Detailed fixes: d2_recommendation.md · top locations in Appendix A, every location in findings.md.

D3 · God Classes6.5 / 10Adequate✓ Tool-verified

What it measures: Over-large classes that try to do too much ("god classes").

Method: God-class detection by line and method-count thresholds per logical type (partial classes unified), filtered for generated code and registration/contract false positives. Deterministic.

Maturity: Documented → Verified → Prevented · effective 6.5 / 10 · rule-coverage 100% · ceiling Prevented

12 god class(es) detected.

MethodTooLong: Parser.Parse · ×6N_m3u8DL-CLI/Parser.cs:74
ClassTooLong: Parser · ×3N_m3u8DL-CLI/Parser.cs
FileTooLong: N_m3u8DL-CLI/Global.cs · ×2N_m3u8DL-CLI/Global.cs
TooManyMethods: GlobalN_m3u8DL-CLI/Global.cs

What to do

  1. Resolve the 6 MethodTooLong finding(s) in God Classes — start with DownloadManager.cs (2), Parser.cs, REDACTED. — One of this dimension's main actionable groups (6 warning-level).
  2. Resolve the 3 ClassTooLong finding(s) in God Classes — start with Parser.cs, REDACTED, DownloadManager.cs. — One of this dimension's main actionable groups (3 warning-level).
  3. Resolve the 2 FileTooLong finding(s) in God Classes — start with Global.cs, Parser.cs. — One of this dimension's main actionable groups (2 warning-level).
  4. Enforce God Classes in CI to reach Verified (currently Documented). — Hardens enforcement from Documented toward Prevented — provenance only; does not change the score.

Detailed fixes: d3_recommendation.md · top locations in Appendix A, every location in findings.md.

D4 · Code Duplication9.1 / 10Stronggated by 15 serious findings✓ Tool-verified

What it measures: Copy-pasted code that should be shared instead.

Method: Code duplication via token-stream sliding windows with type-aware normalization (locals masked, type names preserved), density-scored per KLoC of production code. Deterministic.

Maturity: Documented → Verified → Prevented · effective 9.1 / 10 · rule-coverage 100% · ceiling Verified

15 duplicated block group(s) detected.

Duplicated block (12 lines × 2) · ×3N_m3u8DL-CLI/Decrypter.cs:20
Duplicated block (19 lines × 2) · ×2N_m3u8DL-CLI/Parser.cs:633
Duplicated block (8 lines × 2) · ×2N_m3u8DL-CLI/FFmpeg.cs:98
Duplicated block (5 lines × 2) · ×2N_m3u8DL-CLI/IqJsonParser.cs:33
Duplicated block (64 lines × 2)N_m3u8DL-CLI/DownloadManager.cs:449

+ 5 more group(s) — more in Appendix A; the complete list is findings.md.

What to do

  1. Resolve the 3 Duplicated block (12 lines × 2) finding(s) in Code Duplication — start with Decrypter.cs, DownloadManager.cs, IqJsonParser.cs. — One of this dimension's main actionable groups (3 warning-level).
  2. Resolve the 2 Duplicated block (19 lines × 2) finding(s) in Code Duplication — start with Parser.cs, Global.cs. — One of this dimension's main actionable groups (2 warning-level).
  3. Resolve the 2 Duplicated block (8 lines × 2) finding(s) in Code Duplication — start with FFmpeg.cs, Decode51CtoKey.cs. — One of this dimension's main actionable groups (2 warning-level).
  4. Enforce Code Duplication in CI to reach Verified (currently Documented). — Hardens enforcement from Documented toward Verified — provenance only; does not change the score.

Detailed fixes: d4_recommendation.md · top locations in Appendix A, every location in findings.md.

D5 · Coupling10.0 / 10Exemplary✓ Tool-verified

What it measures: Whether volatile projects sit underneath others that depend on them (so their churn ripples upward), and whether project dependencies form cycles. A widely-depended-on but stable shared/kernel project is healthy, not penalised.

Method: Dependency cycles via elementary-DFS over real .csproj references, plus Martin instability (afferent/efferent) per project. Exhaustive over the reference graph, deterministic.

Coverage: Exhaustive · type-level: afferent/efferent coupling + cycles computed over every production type — the population is all types, not a name convention.

Maturity: Documented → Verified → Prevented · effective 10.0 / 10 · rule-coverage 100% · ceiling Prevented

1 projects, 0 dependency cycle(s), 0 unstable depended-on project(s).

✓ On the Gold path — maintain.

Detailed fixes: d5_recommendation.md.

D6 · Cohesion (LCOM4)10.0 / 10Exemplary✓ Tool-verified

What it measures: Whether a class's methods are focused on a single responsibility.

Method: LCOM4 cohesion per production class with at least two methods: connected components of methods sharing state or calls, computed syntactically. Deterministic, not a proxy.

Coverage: Exhaustive · type-level: LCOM4 cohesion computed over every production class — the population is all types, not a name convention.

Maturity: Documented → Verified → Prevented · effective 10.0 / 10 · rule-coverage 100% · ceiling Verified

0 of 5 classes have LCOM4 above 3.

✓ On the Gold path — maintain.

Detailed fixes: d6_recommendation.md.

D8 · Code Coverage0.0 / 10Critical✓ Tool-verified

What it measures: How much of the code is actually exercised by tests.

Method: Coverage from coverlet runs or committed reports (Cobertura/OpenCover/lcov), computed per-file with structured exclusions for generated, trivial, and glue code. When the suite can't be built/run in-image AND no report is committed, coverage is reported NOT-MEASURED (excluded from the score) with the precondition to make it measurable — never a LoC-ratio proxy folded in as if measured. Deterministic.

Maturity: Documented → Verified → Prevented · effective 0.0 / 10 · rule-coverage 100% · ceiling Verified

No automated tests — no test code was found in this repository.

No automated tests

What to do

  1. Resolve the 1 No automated tests finding(s) in Code Coverage. — One of this dimension's main actionable groups (1 issue-level).
  2. Enforce Code Coverage in CI to reach Verified (currently Documented). — Hardens enforcement from Documented toward Verified — provenance only; does not change the score.

Detailed fixes: d8_recommendation.md · top locations in Appendix A, every location in findings.md.

D9 · Test Distribution0.0 / 10Critical✓ Tool-verified

What it measures: Whether the test suite has a healthy mix of unit / integration / end-to-end tests.

Method: Test projects classified (Unit/Integration/BDD/E2E) from compiled metadata; test methods counted exhaustively across projects with placement-agnostic disk fallback. Deterministic.

Maturity: Documented → Verified → Prevented · effective 0.0 / 10 · rule-coverage 100% · ceiling Documented

No test suite found.

No tests found

What to do

  1. Resolve the 1 No tests found finding(s) in Test Distribution. — One of this dimension's main actionable groups (1 recommendation-level).

Detailed fixes: d9_recommendation.md · top locations in Appendix A, every location in findings.md.

D13 · Secret Scanning10.0 / 10Exemplary○ Nothing flagged

What it measures: Whether any secrets (keys, tokens, passwords) have leaked into the code.

Method: In-process native secret scanner (entropy plus signature patterns) across all tracked files; no external tool. A clean result is a measured 10, not no-data zero. Deterministic.

Maturity: Documented → Verified → Prevented · effective 10.0 / 10 · rule-coverage 100% · ceiling Prevented

Secret scan ran and found no leaked secrets.

✓ On the Gold path — maintain.

Detailed fixes: d13_recommendation.md.

D14 · License Compliance10.0 / 10Exemplary○ Nothing flagged

What it measures: Whether the licenses of third-party packages are compatible with your policy.

Method: Third-party package licenses resolved from declared package metadata and checked against the configured policy (allow/deny/copyleft). Deterministic; clean = no incompatible license found at metadata depth.

Maturity: Documented → Verified → Prevented · effective 10.0 / 10 · rule-coverage 100% · ceiling Verified

0 of 104 packages use a banned license. The depth of this set was not established for this repository: the graded packages are what this pass resolved, and no lockfile was read, so it is not certified to be the full transitive closure.

✓ On the Gold path — maintain.

Detailed fixes: d14_recommendation.md.

D15 · Churn × Complexity Hotspots0.0 / 10Critical✓ Tool-verified

What it measures: Files that change often and are also complex — the riskiest hotspots.

Method: Per production file churn times cyclomatic complexity over a rolling window, computed from git and Roslyn/JS/Razor analysis. Exhaustive, deterministic per commit date.

Maturity: Documented → Verified → Prevented · effective 0.0 / 10 · rule-coverage 100% · ceiling Documented

Top hotspots: N_m3u8DL-CLI/Parser.cs (2×160=320)

Hotspot: N_m3u8DL-CLI/Parser.csN_m3u8DL-CLI/Parser.cs:74

What to do

  1. Resolve the 1 Hotspot finding(s) in Churn × Complexity Hotspots — start with Parser.cs. — One of this dimension's main actionable groups (1 warning-level).

Detailed fixes: d15_recommendation.md · top locations in Appendix A, every location in findings.md.

D17 · Explicit Debt6.2 / 10Adequate✓ Tool-verified

What it measures: Acknowledged debt left in the code — TODOs, dead code, suppressed warnings.

Method: Roslyn syntactic debt markers (suppressions/TODO/FIXME/HACK/empty-catch/commented-code/Obsolete) plus SymbolFinder dead-code analysis; weighted-debt-per-KLoC density deducted 2.0x per unit. Deterministic, exhaustive.

Maturity: Documented → Verified → Prevented · effective 6.2 / 10 · rule-coverage 100% · ceiling Prevented

21 deducted debt markers + unmeasured dead symbols across 6576 LoC in the .NET projects (1.9/KLoC) → score 6.2. Dead code not measured: the solution did not load cleanly, so the reference search was skipped.

EmptyCatchBlock · ×15N_m3u8DL-CLI/DownloadManager.cs:112
CommentedOutCode · ×6N_m3u8DL-CLI/Downloader.cs:56

What to do

  1. Resolve the 15 EmptyCatchBlock finding(s) in Explicit Debt — start with DownloadManager.cs (6), Global.cs (4), LOGGER.cs (3). — One of this dimension's main actionable groups (15 issue-level).
  2. Resolve the 6 CommentedOutCode finding(s) in Explicit Debt — start with Parser.cs (4), Downloader.cs, HLSLiveDownloader.cs. — One of this dimension's main actionable groups (6 warning-level).
  3. Enforce Explicit Debt in CI to reach Verified (currently Documented). — Hardens enforcement from Documented toward Prevented — provenance only; does not change the score.

Detailed fixes: d17_recommendation.md · top locations in Appendix A, every location in findings.md.

D18 · Solution Shape10.0 / 10Exemplary✓ Tool-verified

What it measures: Whether the solution is laid out in a sensible, conventional structure.

Method: Solution structure: project count, decomposition, shell-project detection, build success (confirmed failures cap the score); traced to actual .sln files and binaries. Deterministic.

Maturity: Documented → Verified → Prevented · effective 10.0 / 10 · rule-coverage 100% · ceiling Documented

1 projects, 23 source files, 6576 hand-written lines of code (6576 production / 0 test — the split is derived per file: test is what its project, its own path, or a compile-guarded region marks as test, and a file carrying no test signal counts as production), plus 743 generated (machine-written code — designer, scaffolded and tool-emitted files — excluded from quality), 0 inter-project edges (build NOT measured — `dotnet build` did not complete in the analyzer, so the build half of this dimension is unmeasured rather than failed: the score above rests on structure alone and is not capped. The diagnostics that stopped it are named under Limitations.)

✓ On the Gold path — maintain.

Detailed fixes: d18_recommendation.md.

D19 · Documentation QualityStrong◐ Sampled · advisory

What it measures: Whether the project's documentation is clear, complete, and useful.

Method: Judged by language model at low temperature (0.0-0.1) on a deterministic doc sample (READMEs plus first 25 architecture docs), with two-pass stability filtering. Advisory, sampled.

Maturity: Documented → Verified → Prevented · effective Strong / 10 · rule-coverage 100% · ceiling Documented

The repository's root README (downloadable at https://github.com/nilaoda/N_m3u8DL-CLI) is a well-written English landing page for the CLI tool N_m3u8DL-CLI. It states what it does clearly and links to releases, GitHub actions, and an MIT license. The document also includes a cross-project note about N_m3u8DL-RE (a separate project that supports cross-platform) and a dedicated '下载使用' section with release URLs for the auto-built test version. A README-only document is not shown in this summary; the visible content is focused on usage, commands, and licensing rather than an overview of what the tool does or its architecture.

XML-doc coverage: N_m3u8DL-CLIN_m3u8DL-CLI/N_m3u8DL-CLI.csproj

What to do

  1. Improve Documentation Quality — currently 7.0/10. — The repository's root README (downloadable at https://github.com/nilaoda/N_m3u8DL-CLI) is a well-written English landing page for the CLI tool N_m3u8DL-CLI. It states what it does clearly and links to releases, GitHub actions, and an MIT license. The document also includes a cross-project note about N_m3u8DL-RE (a separate project that supports cross-platform) and a dedicated '下载使用' section with release URLs for the auto-built test version. A README-only document is not shown in this summary; the visible content is focused on usage, commands, and licensing rather than an overview of what the tool does or its architecture.

Detailed fixes: d19_recommendation.md · top locations in Appendix A, every location in findings.md.

D20 · ADR Quality0.0 / 10Critical✓ Tool-verified

What it measures: Whether architecture decisions are recorded well (context, decision, consequences).

Method: Per-ADR judgment by language model at low temperature with two-pass stability; confidence is share of ADRs evaluated; enforcement-field presence detected deterministically. Advisory.

Maturity: Documented → Verified → Prevented · effective 0.0 / 10 · rule-coverage 100% · ceiling Documented

No architecture decision records were found.

No ADRs found

What to do

  1. Resolve the 1 No ADRs found finding(s) in ADR Quality. — One of this dimension's main actionable groups (1 recommendation-level).

Detailed fixes: d20_recommendation.md · top locations in Appendix A, every location in findings.md.

D21 · Naming ConsistencyAdequate◐ Sampled · advisory

What it measures: Whether names — types, methods, variables — are clear and consistent.

Method: Judged by language model at low temperature (0.0-0.1) on a deterministic random symbol sample (fixed size, not exhaustive), with disclosed confidence band. Advisory, sampled.

Maturity: Documented → Verified → Prevented · effective Adequate / 10 · rule-coverage 100% · ceiling Verified

4 naming inconsistencies across 200 sampled symbols.

Typo in property names: 'Verison' is misspelled instead of 'Version'. This typo is consistently applied to both the success and failure state strings, but represents a spelling error in the codebase vocabulary.
Inconsistent casing for the same concept (Initialization Vector). The private field uses lowercase 'iv' while the public property uses PascalCase 'Iv'. While C# conventions often differ for backing fields, having both exposed or used interchangeably in this manner suggests a lack of standardization in casing for this specific term.
Inconsistent casing for the same concept (HTTP Headers). The public property uses PascalCase 'Headers' while the private field uses camelCase 'headers'. This creates confusion about whether they are distinct or the same underlying data.
Inconsistent casing for the same concept (File URL). The public property uses PascalCase 'FileUrl' while the private field uses camelCase 'fileUrl'.

What to do

  1. Resolve the 1 Typo in property names finding(s) in Naming Consistency. — One of this dimension's main actionable groups (1 recommendation-level).
  2. Resolve the 1 Inconsistent casing for the same concept (Initialization Vector). The… finding(s) in Naming Consistency. — One of this dimension's main actionable groups (1 recommendation-level).
  3. Resolve the 1 Inconsistent casing for the same concept (HTTP Headers). The public… finding(s) in Naming Consistency. — One of this dimension's main actionable groups (1 recommendation-level).

Detailed fixes: d21_recommendation.md · top locations in Appendix A, every location in findings.md.

D24 · Comment ValueExemplary◐ Sampled · advisory

What it measures: Whether comments are worth it — explaining WHY (valuable) rather than WHAT (redundant).

Method: Judged by language model at low temperature (0.0-0.1) on deterministically sampled inline comments with surrounding code; findings verified back to sampled comments by substring match. Advisory, sampled.

Maturity: Documented → Verified → Prevented · effective Exemplary / 10 · rule-coverage 100% · ceiling Documented

62 valuable / 0 redundant across 200 sampled comments.

✓ On the Gold path — maintain.

Detailed fixes: d24_recommendation.md.

D26 · Project Cohesion10.0 / 10Exemplary✓ Tool-verified

What it measures: Whether each project is a focused, coherent unit rather than an oversized grab-bag.

Method: Project size overshoot penalties (LoC / public-type count / namespace count, 2-of-3 flag) weighted by log magnitude. Exhaustive across projects, deterministic, LLM-independent.

Maturity: Documented → Verified → Prevented · effective 10.0 / 10 · rule-coverage 100% · ceiling Documented

0 of 1 projects flagged as possibly oversized/incoherent.

✓ On the Gold path — maintain.

Detailed fixes: d26_recommendation.md.

D28 · Secrets (history)10.0 / 10Exemplary○ Nothing flagged

What it measures: Whether any secrets were ever committed — scanned across the full git history, not just now.

Method: Secret scan via TWO gitleaks detect passes in an isolated checkout — the full git history, then a second --no-git pass over the working tree as it stands — merged and de-duplicated by (rule, file, line); each match flagged High. Both invocations are recorded in the audit trail. Exhaustive; when the tool is absent, or when its output cannot be parsed into the expected shape, the dimension is WITHHELD as an explicit measurement gap on our side — unscored and excluded from the lens, never a hedged middling score.

Maturity: Documented → Verified → Prevented · effective 10.0 / 10 · rule-coverage 100% · ceiling Documented

gitleaks scanned the full history AND the current working tree and found no secrets.

✓ On the Gold path — maintain.

Detailed fixes: d28_recommendation.md.

D29 · Static Analysis (SAST)6.8 / 10Adequate✓ Tool-verified

What it measures: Real static-analysis (SAST) findings — likely security bugs in the code, any language.

Method: Polyglot static analysis via semgrep across the repo using the pinned, image-baked p/security-audit + p/owasp-top-ten rulesets (no scan-time registry fetch); severity rules (ERROR/WARNING/INFO) map to a full-band severity-weighted score. Exhaustive, deterministic; degrades on parse failure.

Coverage: semgrep pattern rules over all files — exhaustive for the rule set, blind to classes of bug without a rule (clean = no rule matched).

Maturity: Documented → Verified → Prevented · effective 6.8 / 10 · rule-coverage 100% · ceiling Documented

9 finding(s): 0 critical, 5 high, 4 medium, 0 low. 4 unpinned-GitHub-Actions row(s) are reported here but scored by D36 (supply-chain provenance), which measures that posture as `pinned_actions` — one pinning decision is charged once, not once per lens.

REDACTED
REDACTED
REDACTED
REDACTED
REDACTED

What to do

  1. Resolve the 1 REDACTED finding(s) in Static Analysis (SAST) — start with REDACTED. — One of this dimension's main actionable groups (1 issue-level).
  2. Resolve the 2 REDACTED finding(s) in Static Analysis (SAST) — start with REDACTED (2). — One of this dimension's main actionable groups (2 warning-level).
  3. No action in Static Analysis (SAST) — all 4 REDACTED finding(s) are reported here at file:line but scored by D36 (supply-chain provenance), so none is charged to this dimension. — One of this dimension's main actionable groups (4 issue-level, 0 of them charged here).

Detailed fixes: d29_recommendation.md · top locations in Appendix A, every location in findings.md.

D30 · Dependency Vulnerabilities10.0 / 10Exemplary○ Nothing flagged

What it measures: Whether any dependency has a known published vulnerability (CVE), direct or transitive, in ANY ecosystem the repository declares — Dart pub, Elixir and Erlang via Hex, Go modules, Java and Kotlin via Maven/Gradle, JavaScript/npm, .NET/NuGet, PHP/Composer, Python/PyPI, RubyGems, Rust/Cargo and Swift.

Method: Dependency-CVE scan across every ecosystem the repository declares, scored ONCE. Three sources are unioned and deduplicated by advisory identity (rule id + alias closure, CVE<->GHSA) scoped to package+version, keeping the worst severity: `osv-scanner --recursive` over osv.dev for Dart pub, Elixir/Hex (and Erlang, whose `rebar.lock` syft first converts to a CycloneDX SBOM the scanner reads, with rows attributed back to the lock), Go, Java and Kotlin via Maven/Gradle (and Scala, whose sbt build's pinned direct declarations are written into a CycloneDX SBOM the scanner reads, with rows attributed back to the build file), npm, PHP/Composer, Python/PyPI, RubyGems, Rust/Cargo and Swift; `trivy fs --scanners vuln` for npm lockfiles; and `dotnet list package --vulnerable --include-transitive` for NuGet (with per-advisory collapse of the project x target-framework fan-out), plus a DECLARED-dependency arm that resolves a published gem's gemspec against rubygems.org where no Gemfile.lock is committed. `SeverityScore(c,h,m,l, normalizer 8.0)`. NotApplicable only when NO ecosystem is readable; if any applicable ecosystem could not be scanned the findings are REPORTED and the score is withheld. Supersedes the npm and OSV arms, retired 2026-09-05.

Maturity: Documented → Verified → Prevented · effective 10.0 / 10 · rule-coverage 100% · ceiling Documented

No known-vulnerable dependencies in the 1 ecosystem(s) that were scanned (nuget packages.config). Partial dependency scan: 1 of 2 declared ecosystem(s) were scanned (nuget packages.config), and the findings above are real and complete for them. nuget was not scanned (nuget: `dotnet list package --vulnerable` could not read this solution's dependency graph — it reported an error for at least one project and returned no package data at all (typically a packages.config / non-PackageReference project, which the command cannot read). An unreadable dependency graph is not a clean one; migrate the project(s) to PackageReference to enable this scan), so this is not the whole dependency surface and the result is reported at reduced confidence.

✓ On the Gold path — maintain.

Detailed fixes: d30_recommendation.md.

D34 · Knowledge Freshness0.0 / 10Critical✓ Tool-verified

What it measures: Whether anyone still has living knowledge of each file, or it has been orphaned — last understood long ago by someone now gone quiet. The sibling of the bus factor: D16 asks who owns it, D34 asks whether anyone still knows it.

Method: File orphaning as total living-knowledge decay below one focused-commit's worth within a year, computed per-file from the D16 decay model. Exhaustive, deterministic over fixed history.

Maturity: Documented → Verified → Prevented · effective 0.0 / 10 · rule-coverage 100% · ceiling Documented

17 of 17 significant source file(s) are orphaned — their living knowledge has decayed to nothing, so no one currently understands them. The largest is N_m3u8DL-CLI/Global.cs. Counted over 17 of the 23 production source files in this repository: the rest are under the ~2,400-byte size floor this dimension measures over.

Orphaned knowledge · ×6N_m3u8DL-CLI/Global.cs:1
Orphaned file · ×11N_m3u8DL-CLI/Decode51CtoKey.cs:1
Further orphaned files (smaller)

What to do

  1. Resolve the 11 Orphaned file finding(s) in Knowledge Freshness — start with Decode51CtoKey.cs, Downloader.cs, FFmpeg.cs. — One of this dimension's main actionable groups (11 recommendation-level).
  2. Resolve the 6 Orphaned knowledge finding(s) in Knowledge Freshness — start with Global.cs, Parser.cs, REDACTED. — One of this dimension's main actionable groups (6 issue-level).
  3. Resolve the 1 Further orphaned files (smaller) finding(s) in Knowledge Freshness. — One of this dimension's main actionable groups (1 recommendation-level).

Detailed fixes: d34_recommendation.md · top locations in Appendix A, every location in findings.md.

D35 · Change Coupling10.0 / 10Exemplary✓ Tool-verified

What it measures: Whether files that change together actually belong together — pairs that repeatedly co-change in git history despite having no explicit code dependency, surfacing the hidden/logical coupling (and boundaries in the wrong place) a static scan can't see.

Method: Pairwise co-occurrence over the per-commit file sets in git history (production source only — tests and generated dropped): Degree-of-Coupling = shared ÷ min individual revisions, reported above noise floors (each file ≥10 revisions, ≥5 shared commits, ≥50% strength); sweeping commits excluded. Deterministic over fixed history.

Coverage: Population: PRODUCTION source files only — test and generated files are dropped before pairing, so a class co-changing with its own test (trivially ~100%) can't drown the real production↔production coupling. Pairs ranked by Degree-of-Coupling. A non-source file is never a coupling PARTICIPANT either: documentation, schemas, config and data files are dropped with the rest, so a code↔docs pair — a command and the reference page that restates it — is not reported however strongly the two co-change; nor is coupling that runs THROUGH a build step or config file.

Maturity: Documented → Verified → Prevented · effective 10.0 / 10 · rule-coverage 100% · ceiling Documented

No strong hidden change-coupling between production files.

✓ On the Gold path — maintain.

Detailed fixes: d35_recommendation.md.

D43 · Malicious Dependencies10.0 / 10Exemplary✓ Tool-verified

What it measures: Whether any dependency the repository declares is published as MALICIOUS rather than merely vulnerable — a package that is an attacker's work, in any ecosystem osv-scanner reads. Scored apart from D30 because the answer is binary: there is no safe version to upgrade to, and the fix is to remove the package and rotate every credential it could have read.

Method: The same dependency scan D30 reads, partitioned on the scanner's own classification rather than rescanned: a row is MALICIOUS when its id is in the `MAL-` space (the ossf/malicious-packages feed) OR its `database_specific.cwe_ids` carries `CWE-506` ("Embedded Malicious Code"). Both channels are structural; the summary text is deliberately NOT read, because a malicious-package record whose summary says only "Critical severity vulnerability" is a real shape ([GHSA redacted]) and a text matcher misses it. Scored BINARY: any surviving row is 0, whatever its severity and however many CVEs sit beside it — a hostile dependency is not a quantity. Applicability and degradation are D30's: NotApplicable only when no ecosystem is readable, and an unscannable ecosystem degrades rather than reading clean. SCORED, not informational.

Maturity: Documented → Verified → Prevented · effective 10.0 / 10 · rule-coverage 100% · ceiling Documented

No dependency in any ecosystem this repository declares is published as malicious.

✓ On the Gold path — maintain.

Detailed fixes: d43_recommendation.md.

Frontend & cross-cutting dimensions

R = React/JS · M = Maturity · P = Readiness.

AX10 · Code composition10.0 / 10Exemplary✓ Tool-verified

Other · Architecture — How the codebase splits by code ROLE — domain, application, infrastructure, test, generated. The significance map behind the knowledge/coupling weighting, and a DDD signal in its own right: a thin domain core under fat infrastructure is the anemic-domain smell, quantified. How each file's role is decided, because the split is only as good as that: a generated name or a build-output tree makes it Generated, a test project makes it Test, and otherwise the file's NAMESPACE and PATH words are matched against fixed vocabularies in a fixed ORDER — domain, then infrastructure, then application — so a file whose words hit two layers is counted under the earlier one. A production file matching none of them counts as application, so that share reads 'application or unclassified' rather than a measured application layer. Roles come from naming convention, never from what the code does.

Method: Roslyn line-count by code ROLE: every source file classified Domain/Application/Infrastructure/Test/Generated by namespace + path convention (the shared CodeRoleClassifier), then significant lines summed per role. Deterministic; the advisory score is the business-logic (domain+application) share of production code.

Coverage: Population: ALL source files, each bucketed into ONE of five roles (Domain/Application/Infrastructure/Test/Generated) by namespace + path convention — a file whose layer isn't named in the convention falls to Application (the neutral default), and the split is line-count, not semantic depth or business value.

What to do

  • The domain core is a small share of production code, but most of the rest matched no layer vocabulary at all — so this is not yet an anemic-domain finding. The namespace/path convention could not place that code, which makes the composition above a statement about the naming, not about the design. Name the layers (or check that the repository's conventions differ from the ones this check knows) before reading a thin domain into it.
AX3 · Project dependency cycles10.0 / 10Exemplary✓ Tool-verified

Other · Architecture — Whether the project-reference graph is acyclic (cycles block independent build/deploy and signal eroding boundaries).

Method: Project reference cycles via elementary-DFS over real .csproj references, using the engine shared with D5/D7; cyclic versus acyclic. Exhaustive, deterministic.

AX4 · Dependency direction10.0 / 10Exemplary✓ Tool-verified

Other · Architecture — Whether dependencies point inward (Domain ← Application ← Infrastructure/Web) — the clean-architecture dependency rule, checked across the project graph.

Method: Layer violations by name-segment inference (Domain/Core to Application to Infrastructure/Web) over the project-reference graph. Exhaustive over all projects, deterministic.

AX5 · Architecture & structure10.0 / 10Exemplary✓ Tool-verified

Other · Architecture — Whether the codebase has a recognisable, scale-appropriate structure (a named architectural style, or modular enough for its size) rather than being an ad-hoc ball of mud.

Method: Roslyn plus csproj analysis: architecture style detection (DDD, clean, vertical-slice, CQRS) and structure fitness for repo size. Deterministic.

GD1 · Unfinished & placeholder code10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Unreviewed-generation residue: shipped members still throwing NotImplementedException, and placeholder string literals left in non-test, non-generated code. Scored as a quality signature, never as a claim about authorship.

Method: Roslyn syntax scan: NotImplementedException throws and placeholder string literals in non-test, non-generated shipped code. Deterministic, code-shape signature.

IC1 · Incompleteness & stubs10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Unfinished work detected by code SHAPE, not keywords: members that only throw a "not implemented" exception, methods that take inputs and return a constant, async methods that never await, dead `if (false)` / `#if false` branches, and skeleton types most of whose members are holes. A real, objective slice of technical debt.

Method: Roslyn syntax scan: incompleteness by code shape (constant-returning methods, async-never-await, #if false branches, guards that return what the code already falls through to, tests an earlier guard already decided, comparisons against NaN, skeleton types), not keyword-gated. Deterministic, code-shape heuristic.

  • A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers). (×38) — N_m3u8DL-CLI/DownloadManager.cs:214, N_m3u8DL-CLI/DownloadManager.cs:301, N_m3u8DL-CLI/DownloadManager.cs:438, …
  • 4 consecutive lines of code sit inside a `/* … */` block — a block of code switched off rather than removed, which rots and confuses. Delete it (version control remembers). — N_m3u8DL-CLI/Parser.cs:972
  • 12 consecutive lines of code sit inside a `/* … */` block — a block of code switched off rather than removed, which rots and confuses. Delete it (version control remembers). — N_m3u8DL-CLI/Parser.cs:985

What to do

  • Clear the softer debt: remove commented-out code and dead branches, re-enable or delete skipped tests, and replace blanket warning suppressions with targeted ones.
M1 · Documentation (README)6.0 / 10Adequate✓ Tool-verified

Maturity · Maturity — Whether the repo and its projects have a README, and whether it's substantive and current.

Method: Filesystem scan: README presence, word count, and headings for depth; git history for staleness. Exhaustive across root and project dirs, deterministic.

What to do

  • Add a build/run (quick start) section to the root README — the first thing a newcomer needs.
  • Explain in the README how to run the tests. Add a section called Testing to the README in the repository's top folder, saying how to run the test suite.
  • Add an 'Architecture' / 'How it works' section to the root README — the high-level shape.
  • Add a README to the 1 of 1 project(s) that lack one — worth up to 2 pts.
M2 · Architecture documentation0.0 / 10Critical✓ Tool-verified

Maturity · Maturity — Whether key decisions (ADRs) and the high-level shape (C4/diagrams) are written down.

Method: Filesystem scan: ADR folder/naming conventions or content, plus Mermaid/PlantUML/C4/architecture.md discovery. Exhaustive, deterministic.

  • No Architecture Decision Records found — no conventional ADR directory, no numbered `NNNN-title` documents in any markup this check reads, and nothing ADR-shaped by content. Design rationale recorded elsewhere (a design-notes tree, a mailing list, pull-request discussion) is not visible to this check and is not re-findable per decision, so a future maintainer cannot ask why one choice was made and get an answer.
  • No C4/Structurizr/PlantUML/Mermaid/Graphviz/D2 diagram, no drawn diagram named for the architecture, no file named `architecture` or `design` in any markup this check reads, and nothing in the README, docs or contributor guides that announces the shape — no `## Architecture` heading, no "architecture overview"/"high-level design" phrasing, no "the architecture is …" introduction, no guided code tour. A shape laid out in prose that never names itself as the architecture is not visible to this check, and neither is one kept outside the repository, so this row reports the absence of a re-findable shape document — not evidence that nobody wrote the shape down.

What to do

  • Record your significant design decisions. Write one short document per decision, giving its date, the situation, the decision and its consequences, and keep them together with your other design documents. A docs/adr folder with each file named by number and title is the easiest place to find them.
  • Add a C4 context/container diagram (Structurizr, PlantUML or Mermaid) or an architecture.md overview.
M3 · Folder & project structure6.0 / 10Adequate✓ Tool-verified

Maturity · Maturity — Whether the repo is organised deliberately — src/test separation and consistent project naming.

Method: Filesystem scan: src/test folder separation and namespace-prefix consistency (majority RootNamespace agreement). Exhaustive across projects, deterministic.

  • Production code isn't grouped under a src/ folder — it all sits under N_m3u8DL-CLI/ alongside the root build files, so the conventional src/ boundary between the product and its tooling isn't drawn.

What to do

  • Group production code under src/ (or split deliberately, e.g. backend/ + frontend/) so production and tooling code aren't mixed at the root.
  • Start a test surface where your build system looks for one (tests/, test/, spec/, or your ecosystem's test source set) — the separation follows from putting the first tests in the right place.
M4 · Documentation accuracy10.0 / 10Exemplary◐ Sampled · advisory

Maturity · Maturity — Whether the README actually describes the code that exists (LLM-judged, advisory).

Method: Judged by language model at low temperature: README accuracy versus actual projects, within a disclosed tolerance. Advisory, not a measured number.

P1 · CI/CD gates8.5 / 10Strong✓ Tool-verified

Readiness · Readiness — Whether an automated pipeline builds and tests every change.

Method: Filesystem scan: CI workflow files (.github/workflows, .gitlab-ci.yml, etc.) for build and test stages. Exhaustive, deterministic.

What to do

  • Run the test suite in CI via an explicit runner step for your stack, and gate merges on it.
P2 · Observability0.0 / 10Critical✓ Tool-verified

Readiness · Readiness — Whether the code is diagnosable in production — structured logging, tracing/metrics, health checks.

Method: Filesystem/Roslyn scan: structured-logging frameworks (Serilog, NLog), OpenTelemetry, and health-check endpoint patterns. Exhaustive, deterministic.

  • No logging or diagnostics emission found. This repository ships a binary its users launch rather than a service you operate, so there is no operator to page — but when a run fails on a user's machine, neither they nor you have anything to read.

What to do

  • Write a diagnostic trail the user can hand back with a bug report: a log file under the platform's per-user data directory, switchable with a `--verbose`/`--debug` flag. Start with the `catch` blocks that emit nothing — a discarded exception is the failure the user cannot describe and you cannot reproduce.
  • For more than a log file, an `ActivitySource`/`EventSource` the user can switch on gives you a structured trace to attach to a bug report. A health-check endpoint does not apply here: nothing orchestrates or load-balances a binary the user launches.
P3 · Security & performance tooling0.0 / 10Critical✓ Tool-verified

Readiness · Readiness — Whether SAST, secret/dependency scanning and performance benchmarking are wired in (presence, not runtime).

Method: Filesystem scan: SAST configuration, dependency-update automation, secret scanning, and a benchmark harness or benchmark step — in this repository's own ecosystem. Exhaustive, deterministic.

  • No static application security testing detected. For this repository's stack, add CodeQL's csharp pack, or a .NET security analyzer package (or `semgrep --config=auto`, which runs on any language) as a CI step. What was searched, so you can tell an absence from a miss: the 798 CI workflow file(s) in this repository, and the scanner and linter configuration checked in beside them. A scan that runs outside CI, one configured in your forge's web UI rather than in a committed file, or a tool whose name is none of those this check carries, is not seen — if that is your case the row is wrong, and saying so is more useful than adding a second scanner.

What to do

  • Add a SAST step to CI running what this repository's stack ships: CodeQL's csharp pack, or a .NET security analyzer package — or `semgrep --config=auto`, which runs on any language — so a security regression fails the build instead of landing.
  • Enable Dependabot/Renovate or a dependency-review gate.
  • Add gitleaks/trufflehog in CI to block PRs that introduce committed secrets.
P6 · Release Hygiene10.0 / 10Exemplary✓ Tool-verified

Readiness · Readiness — Whether releases are traceable — a maintained changelog and explicit version stamping.

Method: Filesystem scan: changelog file presence and version tags in csproj or git tags. Exhaustive, deterministic.

PF3 · Async & latency hygiene10.0 / 10Exemplary✓ Tool-verified

Readiness · Performance — Whether asynchronous code stays responsive — it avoids sync-over-async blocking (a .NET .Wait()/.GetAwaiter().GetResult(), a time.sleep or blocking HTTP call inside a Python coroutine, a *Sync call inside an async JavaScript function, block_on inside a Rust async fn, runBlocking inside a Kotlin suspend function, block() inside a Reactor publisher) that stalls a thread or event loop and risks deadlock, and, where the code is a reusable library on .NET, awaits with ConfigureAwait(false) so it never captures and stalls its caller's context.

Method: Production-source scan: sync-over-async blocking counted everywhere — .Wait()/.GetAwaiter().GetResult() in .NET; off .NET, read from the language model, a blocking call inside an async function (Python, TS/JS, Rust, Kotlin, Swift, Dart) or inside a Java method returning a Reactor Mono/Flux or a Scala method returning a Future or effect — and, for a .NET library with ≥5 awaits, the share of awaits using ConfigureAwait(false). Deterministic, syntax/text detection.

S1 · Cryptographic Hygiene2.0 / 10Critical✓ Tool-verified

Other · Security — Cryptographic hygiene (weak hash/cipher, password key-derivation). This codebase has no web surface, so transport/header/cookie/CSRF controls are N/A and only crypto is scored. Outbound TLS (certificate validation, protocol version) is scored wherever it appears — a client verifies its peer whether or not it serves anything itself.

Method: Roslyn plus filesystem scan: HSTS/security headers, secure cookies, input validation, middleware order, weak crypto (MD5/SHA1/DES); HTTPS-metadata context-aware. On a repository with no .NET source it reads JavaScript/TypeScript, Dart, Ruby, Scala, Rust or Elixir source itself (test, vendored, generated and minified paths not) for the arms that hold whether or not the code serves HTTP: a weak hash or cipher, key material fixed in the source, a TLS client that accepts any certificate, and (JavaScript/TypeScript, Ruby, Scala, Rust and Elixir) an obsolete TLS version; the server controls are not assessed there, and a Dart, Ruby, Scala, Rust or Elixir repository that serves no HTTP of its own is N/A on them. Deterministic.

  • `ServerCertificateValidationCallback` is assigned `ValidateServerCertificate`, which returns `true` unconditionally, so every TLS peer certificate is accepted — including one an attacker presents. Chain, expiry, revocation and hostname are all skipped, so an attacker on the network path can present any certificate and read or rewrite the traffic — the connection is encrypted to the attacker, not to the intended host. Delete the override and let the platform validate. If a specific self-signed or internally-issued certificate genuinely has to be trusted, pin THAT one — compare the presented certificate's public key or thumbprint against the expected value and return `false` for everything else — and scope it to the single handler that talks to that host rather than to the whole process. If the override exists only to get past a development certificate, gate it on a build configuration or an explicit opt-in setting so it cannot ship. — REDACTED:55
  • `SecurityProtocol` explicitly selects `SecurityProtocolType.Ssl3`, a protocol version that is broken (SSL 2.0/3.0) or withdrawn (TLS 1.0/1.1, RFC 8996). Offering an obsolete version does not merely permit it — it is what a downgrade attack negotiates, so the weakest version on the list is the one that decides the connection's strength. Stop pinning versions here: leave the protocol unset (`SecurityProtocolType.SystemDefault`, or simply do not assign it) so the connection uses the OS policy and picks up TLS 1.3 and future versions without a code change. Where a version must be named explicitly, name `Tls12` and `Tls13` only. — REDACTED:57
  • MD5/SHA1 is constructed here, and both are collision-broken. If this digest protects anything — a signature, an integrity or tamper check, a credential, or any value an attacker can influence — that is a real weakness: use SHA-256+ for content integrity, or a KDF (PBKDF2/Argon2/BCrypt) for password storage. If it only derives a non-security identifier (a cache key, a file or mutex name), collision resistance carries no security consequence here; make that intent explicit instead — a non-cryptographic hash such as `System.IO.Hashing.XxHash64`/`Crc32` says it in code — since the algorithm alone cannot distinguish the two uses. (×2) — N_m3u8DL-CLI/Decode51CtoKey.cs:292, N_m3u8DL-CLI/DecodeDdyun.cs:29

What to do

  • Stop accepting every TLS certificate: remove the always-true validation callback so the platform verifies the chain, hostname and expiry. If one self-signed certificate must be trusted, pin it by public key or thumbprint on the single handler that needs it and reject all others — never process-wide.
  • Drop SSL 2.0/3.0 and TLS 1.0/1.1 from the enabled protocol list — prefer leaving it to the OS default (`SystemDefault`) so new versions are picked up automatically, or name `Tls12`/`Tls13` explicitly if it must be pinned.
  • Review each MD5/SHA1 use by what it protects: replace it with SHA-256+ (or a KDF for passwords) where the digest is security-relevant, and switch it to a non-cryptographic hash (`System.IO.Hashing.XxHash64`/`Crc32`) where it only derives an identifier such as a cache key or a mutex name. This repository constructs a collision-broken hash (MD5/SHA1) at 2 sites, not one: `N_m3u8DL-CLI/Decode51CtoKey.cs:292` (MD5), `N_m3u8DL-CLI/DecodeDdyun.cs:29` (MD5). Each is a separate decision — fixing only the line this row cites leaves the others in place.
X1 · Async correctness10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether the code avoids sync-over-async (deadlock-prone blocking on tasks) and async void.

Method: Roslyn syntax scan: async methods scanned for .Wait()/.GetAwaiter().GetResult() and async-void outside event handlers. Deterministic, hard fact per invocation.

X12 · Unreachable branch10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether any branch is dead by construction — a switch arm whose label can never equal a case-normalised subject, or an `else if` whose predicate the arm above has already swallowed.

Method: Roslyn syntax + semantics: switch labels compared against the subject's own case normaliser, and if/else-if chains checked for a literal an earlier arm's containment test already swallows. Deterministic, provable per finding. Advisory.

X13 · Undrained process stream10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether a child process that has BOTH standard streams redirected drains both — reading one to the end while the other is never read deadlocks once the child fills the unread pipe.

Method: Roslyn syntax + semantics: ProcessStartInfo launches with both streams redirected, checked for a drain of each stream across the enclosing type. On a repository with no .NET source it reads JavaScript/TypeScript off the engine’s own token stream (test, vendored and minified paths not) with the same rule: a `spawn` imported from `child_process` whose stdout and stderr are both pipes (no options, no `stdio`, or `stdio` of `'pipe'`), bound to a local that never leaves its scope, where exactly one of the two streams is read, the other never, and the child’s `close`/`exit` (or the read stream’s end) is awaited; a shell redirect in the call’s arguments or a `kill` of the child suppresses it. The same rule reads Python’s `subprocess.Popen`, Dart’s `Process.start`, Ruby’s `Open3.popen3`, and Scala’s JDK process starts (`new ProcessBuilder(…).start()` with no `redirectErrorStream`/`redirectError`/`redirectOutput`/`inheritIO`, `Runtime.getRuntime.exec`) where one of `getInputStream`/`getErrorStream` is read and the other never while `waitFor()` is called or the read stream is read to its end. Deterministic, provable per finding. Advisory.

X14 · Bypassable address classification10.0 / 10Exemplary○ Nothing flagged

Other · Security — Whether a hand-rolled public/private IP check can be walked past — a method that unwraps IPv4-mapped IPv6 but returns the opposite verdict for the same host written as IPv4-compatible, 6to4 or NAT64.

Method: Roslyn syntax + semantics: methods that unwrap IPv4-mapped IPv6 and hand-roll IPv4 range carve-outs, checked for whether the IPv6 branch also accounts for the IPv4-compatible, 6to4 and NAT64 embeddings. Deterministic, provable per finding. Advisory.

X15 · Unvalidated length from an untrusted reader10.0 / 10Exemplary○ Nothing flagged

Other · Security — Whether a length read out of the stream being parsed is bounded before it is allocated or read — an unchecked count taken from the input lets the input choose the allocation.

Method: Roslyn syntax + semantics: integer lengths read from a BinaryReader and spent on a bulk read or an array allocation, checked for any comparison or bounding call on the value anywhere in the method. Deterministic, provable per finding. Advisory.

X16 · Unfloored truncation loop6.1 / 10Adequate✓ Tool-verified

Other · Code Health — Whether a loop that shortens a string until it fits a length budget has a floor — one with none grinds the value down to the empty string, or past it into a negative-length `Substring`.

Method: Roslyn syntax + semantics: while/do loops whose body's only effect on a string is to drop its last character, checked for whether anything — a direct comparison on the length, a body guard, a break — bounds that length below. On a repository with no .NET source it reads JavaScript/TypeScript off the engine’s own token stream (test, vendored and minified paths not) with the same rule: a `while`/`do` loop whose body’s one assignment to a value is `x = x.slice(0, -1)` or `x = x.slice|substring|substr(0, x.length - 1)`, driven by a condition that reads `x.length` only as a term of a larger expression — never compared directly, never tested for truthiness, and with no other read of `x` — and whose body has no `break`, `return`, `throw` or `if` naming `x`. Deterministic, provable per finding. Advisory.

  • `fileName` is shortened by one character per iteration here (line 337), and the loop's only exit is the length test on line 335 — where `fileName.Length` appears as a TERM of a larger expression, never compared against a bound of its own. So nothing stops the loop at one character: it runs until the test's other terms come under the bound WITHOUT any help from `fileName`, which leaves `fileName` as the empty string — and if they never do, the next iteration evaluates a negative length and throws `ArgumentOutOfRangeException`. Neither outcome announces itself, because truncating to nothing is not an error at the point it happens; it surfaces later, as a path that names no file, a key that matches nothing, or a record written blank. Give the loop a floor (`&& fileName.Length > 1`), or compute the length once and clamp it (`fileName = fileName[..Math.Max(1, budget)]`) — and decide explicitly what should happen when the budget cannot be met, rather than letting an empty value be the answer. — REDACTED:335

What to do

  • Each finding names the loop's exit test and the statement that shortens the value. Confirm from the two that nothing bounds the length below, then give the loop a floor and decide — out loud — what should happen when the budget cannot be met: truncating to nothing is a silent answer to that question.
X17 · Uncapped recursion over a caller-supplied document10.0 / 10Exemplary○ Nothing flagged

Other · Security — Whether a walk that recurses through a JSON/XML tree handed in by its caller bounds how deep it will go — an uncapped walk lets the document's nesting choose the stack depth, and the resulting StackOverflowException cannot be caught.

Method: Roslyn syntax + semantics: methods that take a JSON/XML document node and call themselves with a child of it, reachable from an externally-callable member of the same type that accepts a document, checked for any depth parameter, descent counter or threaded arithmetic anywhere in the walk. On a repository with no .NET source it reads TypeScript off the engine’s own token stream (test, vendored, generated and minified paths and `.d.ts` not) with the same rule: a function or method with a parameter typed as a document value — `unknown`, `any`, `object`, `Record<string, unknown|any>`, a JSON alias (`JsonValue`, `JSONObject`, …) or a DOM node global the file does not rebind — that calls itself (bare, or through `this` for a method, or hands itself to a call over the value as in `value.map(walk)`) with something it took out of that value and never through an ancestor accessor such as `closest()` or `parentElement`, that is exported or reached from an exported function (a public method of the same exported class) taking such a value, and that names no depth, level, nesting, recursion, remaining or budget anywhere and threads no `+`/`-` arithmetic through a self-call. Plain JavaScript is not read: with no annotation nothing tells a parsed document from a tree the code built itself. Deterministic, provable per finding. Advisory.

X18 · Disposal-pattern correctness3.5 / 10Weak✓ Tool-verified

Other · Code Health — Whether a type's disposal matches what it OWNS — releasing what it created, leaving alone what it was handed, and not declaring a finalizer for state that has nothing unmanaged to finalize.

Method: Roslyn syntax + semantics: every assignment to a disposable field is read to decide whether the type CREATED the value or was handed it, and the type's disposal is checked against that answer — an injected interface it disposes, a value it constructed and never releases, a finalizer on a type holding nothing unmanaged, and a disposable local whose every reference is a plain member read. A value handed to a container that disposes its contents (a parent control's `Controls` collection, a component `IContainer`) is released by that container and is not reported; generated code is out of population. On a repository with no .NET source the same ownership questions are read in JavaScript/TypeScript off the engine’s own token stream (test, vendored, generated and minified paths not): a class declaring `dispose()`, `[Symbol.dispose]()` or `[Symbol.asyncDispose]()` that disposes a field it was handed through a constructor parameter typed as a repository interface or resolved by a dependency-injection container; that assigns a field only ever from `new X(…)` of a disposable class and neither releases it anywhere in the class nor names it in its disposal member or a method that member calls, nor hands it to anything else; and a `const`/`let` local built from literals only whose every reference opens a statement operating on a non-release member of it. A class is disposable when every repository declaration of its name declares or inherits a disposal member, or when it is a documented library disposable (`vscode` EventEmitter, CancellationTokenSource and Disposable; three.js geometries, materials, textures, render targets, renderers, controls and composers). The finalizer arm has no JavaScript counterpart: a class cannot declare one. Dart is read for the owned-and-never-released arm: a Flutter `State` (or a class declaring `dispose()`/`close()`) whose library-private field is written only with direct creations of a framework controller, `FocusNode`, `StreamController` or periodic `Timer` (or a `.listen(…)` into a field declared `StreamSubscription`), which nothing in the class or its library releases (`dispose`/`close`/`cancel`) and which is never handed on except as a named argument. Ruby is read for the owned-and-never-released arm and the abandoned-local arm: a class declaring an instance `close`, `dispose`, `shutdown`, `stop`, `disconnect` or `terminate` whose instance variable is written only with a blockless core descriptor creation (`File.open`/`new`, `Tempfile`, `Dir.open`, `IO.popen`, the `socket` and `openssl` socket classes) that no method of the class closes and that is never handed on (passed, returned, stored, exposed by `attr_reader`, delegated) — a class whose superclass or mixin lies outside the repository is not judged — and a blockless creation read through and dropped (`File.open(path).read`) or held in a local that is never closed, returned, passed or stored (a `&:read` block-pass, an `autoclose: false` borrow and a `fileno` hand-over are not abandonment). PHP is read for the same two arms: a class (not a trait, and not one using a trait) declaring an instance `close`, `dispose`, `shutdown`, `stop`, `disconnect` or `terminate` whose `private` property (or a `final` class's `protected` one) is written only with a direct core `fopen`, `tmpfile`, `popen`, `proc_open`, `fsockopen`, `stream_socket_client`/`server` or `opendir` that nothing in the class closes (`fclose`, `pclose`, `closedir`, `unset`, a reset to `null`) and that is never handed on, and a handle held in a function's local, or read through as the argument of a reader, that is never closed, returned, passed, captured or stored; a `php://` stream, `curl_init`, `SplFileObject`, `PDO` and a function the repository declares under the core name are not read. Deterministic, provable per finding. Advisory.

  • `ChaCha20` declares a finalizer (line 522), but nothing in the type is unmanaged: no `IntPtr`/`UIntPtr` or pointer field, no `SafeHandle`, no `HandleRef`, no `extern`/`DllImport` member and no `Marshal`/`GCHandle`/`NativeMemory` use. A finalizer can only release what the garbage collector cannot, so on a purely-managed type it releases nothing and costs something: every instance is put on the finalizer queue, survives at least one extra collection, and is then finalized on a thread that is NOT the disposing one — where the managed objects it touches may already have been finalized themselves. Delete the finalizer (and the `GC.SuppressFinalize` that exists to defuse it); if a handle is added later, wrap it in a `SafeHandle`, which brings its own correct finalization. — N_m3u8DL-CLI/CSChaCha20.cs:522

What to do

  • Each finding names the value and the span that decides who owns it — the `new` that created it, or the constructor parameter that handed it over. Confirm ownership from that span, then make the disposal match it: release what this type created, leave what it was injected with to whoever created THAT, and drop a finalizer whose type holds nothing unmanaged to release.
X19 · Unrestored process-global state3.5 / 10Weak✓ Tool-verified

Other · Code Health — Whether a method that temporarily changes state belonging to the whole process — the working directory, an environment variable — puts it back on EVERY path: a restore reached only when nothing throws leaks the change to the rest of the process.

Method: Roslyn syntax + semantics: method bodies that write the process working directory or an environment variable and write it back in the same body, checked for whether that restore sits in a `finally`/`catch` or only on the straight-line path. On a repository with no .NET source the same rule reads production JavaScript/TypeScript off the engine’s own token stream (test, vendored and minified paths not): `process.chdir`, `process.env.NAME =`/`["NAME"] =` and `delete process.env.NAME`, and Deno’s `Deno.chdir`/`Deno.env.set`/`Deno.env.delete`, paired per function body (a nested function or arrow is its own body, and module top-level code is none), where the last write puts back a local the body captured from the same global or deletes a variable the first write set, with at least one statement between them; a write in a `catch`/`finally` of that body silences it. Deterministic, provable per finding. Advisory.

  • `Run` changes state that belongs to the whole PROCESS and changes it back at the end of the same body — the process working directory (changed at line 127, put back at line 144) and the `FFREPORT` environment variable (set at line 130, cleared at line 143) — which says the change was meant to last no longer than this call. But the restore is an ordinary statement on the straight-line path, not a `finally`, so it is skipped by any exception thrown in between: the process then keeps the overwritten value for the rest of its life, and every later relative path, child-process launch or config read in ANY code resolves against it. That failure is silent and remote from its cause — the method that breaks is not the method that moved the directory. The window is also not private to this call while it is open: the working directory and the environment block are per-process, not per-thread, so a concurrent thread doing file I/O during it resolves against the wrong directory too. The durable fix is not to widen the restore but to stop mutating the global: pass the value to the operation that needs it — `ProcessStartInfo.WorkingDirectory` and `ProcessStartInfo.Environment` scope both to the CHILD — or build absolute paths. Where the global genuinely must move, wrap it `try`/`finally` so the restore runs on every path. — N_m3u8DL-CLI/FFmpeg.cs:124

What to do

  • Each finding names the statement that changes the process-global value and the statement that puts it back. Confirm from the two that nothing between them is protected — then prefer removing the mutation over widening the restore: a working directory or an environment variable passed to the operation that needs it (`ProcessStartInfo.WorkingDirectory`, `ProcessStartInfo.Environment`) is scoped to that operation, which is what the save-and-restore was trying to approximate. Where the global genuinely must move, a `try`/`finally` is the least that makes the restore unconditional.
X2 · Cancellation propagation4.0 / 10Weak✓ Tool-verified

Other · Code Health — Whether async methods accept a CancellationToken so work can be cancelled (adoption curve).

Method: Roslyn scan: every async method (excluding framework-fixed overrides/Blazor handlers) checked for CancellationToken parameter presence. Deterministic, adoption percentage. On a repository with no .NET source it reads JavaScript/TypeScript off the engine’s own token stream (test, vendored and minified paths not) with the same question: every named async function that itself makes a request an AbortSignal can cancel (global `fetch`, axios and its file-local instances, ky, ofetch) counts, and it is compliant when its parameters or body name a signal or it hands one of its own parameters to the request as options; signatures a framework fixes (JSX event handlers, route and lifecycle exports, request-first handlers, `override`, `'use server'` modules, TanStack `mutationFn`) are exempt unless they take a signal. Deterministic, adoption percentage.

  • Only 0/1 async methods accept a CancellationToken, so in-flight work can't be stopped early when the caller gives up — whatever ends it in your host (shutdown signal, timeout, abandoned request, user cancel). Thread a token through the call chain and honour it at each await and loop; where a method genuinely cannot be interrupted, omitting it is a deliberate choice — judge against your hosting model.
  • No CancellationToken parameter — this work can't be stopped early once started. — N_m3u8DL-CLI/CSChaCha20.cs:383

What to do

  • Thread a CancellationToken through async methods so work stops promptly on cancellation.
X20 · Mistyped argument guard10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether an argument guard throws the exception its own condition describes — a guard that rejects a value for being EMPTY and reports it as `ArgumentNullException` tells the caller a parameter was null when it provably was not.

Method: Roslyn syntax: `throw new ArgumentNullException(nameof(p))` statements controlled by an `if`, whose condition is read for a test that is true of a NON-null `p` — an emptiness test that dereferences it (`p.Count == 0`, `!p.Any()`) or a BCL predicate documented true of the empty value (`string.IsNullOrEmpty(p)`). Deterministic, provable per finding. Advisory.

X21 · Side-effecting pattern guard10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether a `when` guard is free of side effects — a guard that increments a counter or assigns while deciding whether its arm matches applies that change during PATTERN MATCHING, on an arm that may not be selected, and skips it entirely when a short-circuit to its left answers first.

Method: Roslyn syntax: `when` guards on case labels and switch-expression arms, read for a mutation (`++`/`--`/assignment) sitting in a position the guard's own `&&`/`||`/`??`/`?:`/`?.` can skip. Deterministic, provable per finding. Advisory.

X22 · Contradicted release guard10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether a method that TAKES a lock or semaphore and gives it back from a flag-guarded `finally` returns the value that flag implies — reporting success while the guard hands the primitive back admits a second caller the exclusion was there to keep out, and reporting failure while the guard keeps it leaves nothing to ever give it back.

Method: Roslyn syntax: `try` statements whose `finally` releases a synchronisation primitive under a bare local-bool guard, where the method also TOOK that same primitive before the `try`, checked for a `return` of a bool literal whose value disagrees with the flag state the method's own straight-line assignments put it in. Deterministic, provable per finding. Advisory.

X23 · Unguarded diagnostic materialisation10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether the work a diagnostic log line costs is paid only when that line is wanted — C# evaluates a call's arguments BEFORE the call, so a trace/debug message joined or projected out of a collection is built in full on every pass, and then discarded by a sink the shipped configuration leaves switched off.

Method: Roslyn syntax: log calls at a diagnostic level (a `Log`-prefixed method naming Trace/Debug/Verbose, or a bare `Debug`/`Trace`/`Verbose` on a receiver named for a logger), whose argument list is read for a call whose cost scales with a sequence — a LINQ operator, a materialisation, `string.Join`, a serializer — with no enclosing level check or conditional-compilation region. On a repository with no .NET source it reads JavaScript/TypeScript off the engine’s own token stream (test, vendored and minified paths not) with the same rule: a `debug`/`trace`/`verbose` call on a receiver named for a logger, or a `log`-prefixed method naming the level, whose argument calls an array operator (`map`/`filter`/`reduce`/`sort`/…), `Array.from`, `Object.keys/values/entries`, `JSON.stringify`/`util.inspect` over anything but a literal, or an array `join` — outside any arrow or function passed as an argument, which the logger calls only when the level is on — with no enclosing `if`, `&&` or `?:` whose condition names a level, a level string, or the `NODE_ENV`/`__DEV__`/`DEV` build switch. Deterministic, provable per finding. Advisory.

X24 · Document value interpolated into markup unescaped10.0 / 10Exemplary○ Nothing flagged

Other · Security — Whether text read out of the document being converted is escaped before it is written into generated markup — a value the document's author chose, interpolated into an attribute the surrounding literal delimits, can close that attribute and open another.

Method: Roslyn semantic model over the whole compilation: a string-typed `Value`/`InnerText`/`InnerXml`/`Text` member declared inside `DocumentFormat.OpenXml` or `System.Xml` is a taint SOURCE, propagated through assignments, returns, arguments, tuple elements and string composition to its transitive closure, then read at interpolated-string holes that sit in a markup position the surrounding literal itself delimits. Escaper/encoder calls and enclosing validator conditions cut the flow. Flow- and container-insensitive by construction. A second arm needs no provenance at all and reports a type that CONTRADICTS ITSELF — the same expression escaped at one delimited markup hole and interpolated raw at another hole in the same markup position of the same type, which the type's own escaping proves is a defect without knowing where the value came from. On a repository with no .NET source it reads JavaScript/TypeScript off the token stream with the same rule: a DOM read of raw document text (`getAttribute`, `textContent`, `innerText`, `nodeValue`) is the source, propagated through local bindings and string composition, and judged at template-literal and concatenation holes in the same two delimited markup positions; escapers and validating conditions cut it, and documentation-site, test, vendored and minified scripts are not read. Deterministic, provable per finding. Advisory.

X25 · Inert configuration knob10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether a value the caller is invited to supply is the value the type actually uses — a constructor parameter stored in a private field that nothing ever reads while the default it was given is spelled out a second time at the site that should have read it, a keyed lookup that falls back to a different setting than the one its key names while the same type falls back to the matching one for that same key, or a culture-sensitive parse given no format provider by a type that feeds its own settable culture to the same kind of parse elsewhere, or a number an entry point writes to standard output under the host's culture while the same entry point formats with the invariant culture elsewhere. Either way, every caller who supplies a value silently gets something else.

Method: Roslyn syntax: private instance fields of a non-partial type assigned in a constructor from one of its own parameters with a `??` fallback, checked for whether anything in the type body reads the field and whether that same fallback expression is spelled out again outside the constructor; and `??` fallbacks onto a member access from a lookup call carrying exactly one string literal, grouped by that key across the type and checked for a fallback member whose folded name disagrees with the key while a sibling site for the same key agrees with it. On a repository with no .NET source the first two arms read JavaScript/TypeScript off the engine’s own token stream (tests included, bundles and vendored paths not): a `#x`, `private` or `private` parameter-property instance field filled in the constructor from a parameter (or one member of one) through `??`/`||` or a parameter default, never read anywhere in the file by name, whose constructed default is spelled again in the class body; and `lookup("key") ?? s.member` grouped by key per class, or per module outside every class. The culture arm has no JavaScript counterpart: its parses take no locale. Deterministic, provable per finding. Advisory.

X26 · Unsynchronised callback handoff10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether a value handed from a callback to the body that waits on it crosses on something built to be crossed — a `Queue<T>`/`List<T>`/`Dictionary<K,V>` written inside an event handler and read back outside it is mutated by two flows at once, and the semaphore or completion source beside it orders how MANY items exist while leaving the collection's own head, tail and backing array unprotected.

Method: Roslyn syntax: method, accessor, local-function and lambda bodies that declare BOTH a non-thread-safe generic collection (`Queue`/`Stack`/`List`/`Dictionary`/`HashSet`/`Sorted*`/`LinkedList`) and a synchronisation primitive (`SemaphoreSlim`/`TaskCompletionSource`/`ManualResetEvent(Slim)`/`AutoResetEvent`/`CountdownEvent`) as locals, then read for a `+=`-registered lambda that raises that primitive while the body outside every lambda waits on it — and, in that scope, a mutating call on the collection inside the lambda paired with a mention of it outside. Any `lock` in the scope abstains it. On a repository with no .NET source the same handoff is read in Java off the engine’s own token stream (test source sets, vendored and demonstration paths not): an `ArrayList`/`LinkedList`/`ArrayDeque`/`PriorityQueue`/`Hash*`/`LinkedHash*`/`Tree*` local and a `CountDownLatch`/`Semaphore`/`CompletableFuture` local, a lambda or anonymous class that raises the primitive and mutates the collection, and a wait outside it; any `synchronized` or `lock()` abstains the body. Because each of those primitives orders what the callback wrote before raising it, only a touch that provably overlaps the callback is convicted: one after the registration and before the next wait, or one in a loop registered-before, waiting on every pass and not declaring the collection. Deterministic, provable per finding. Advisory.

X27 · Collection changed while being enumerated10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether a `foreach` leaves the collection it is walking alone — a body that adds to or removes from the very collection the loop is enumerating invalidates the enumerator it is holding, so the next `MoveNext` throws `InvalidOperationException` and the remaining items are never seen.

Method: Roslyn syntax + semantics: `foreach` statements whose body calls a structural mutator (`Add`/`Remove`/`Clear`/`Insert`/…) on the very expression the loop is enumerating. Two arms. ARM A — the source is a concrete fragile BCL collection, or a live `Keys`/`Values` view over one, and the mutator resolves to that same collection's own member; concurrent and immutable collections and arrays are outside the population by construction, since their enumerators survive a structural change. ARM B — the source is an argument-less accessor CALL on a receiver whose body is in source: the accessor must return a stored field VERBATIM and a sibling member must structurally change that same field, both read off the implementations rather than from the members' names. A mutation the loop provably exits immediately after (`break`/`return`/`throw`/`goto`), or one written inside a nested loop or a lambda, is counted and never reported. Deterministic, provable per finding. Advisory.

X28 · Index access outside its own emptiness guard10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether a condition that tests a value for emptiness indexes that same value only where the test holds — an `||` written one parenthesis too far to the left leaves an index access outside the guard beside it, so the empty case the guard exists to anticipate reaches the index and throws.

Method: Roslyn syntax only, no semantic model: the OUTERMOST `&&`/`||` of every boolean condition, read for a symbol the condition tests for emptiness (`string.IsNullOrEmpty`/`IsNullOrWhiteSpace`, a `Length`/`Count` comparison against a literal, `Any()`, a `Length`/`Count` pattern, or a comparison against `""`) and ALSO indexes. Each `symbol[...]` access is placed by a boolean-reachability walk from the access up to the outermost connective: an access is COVERED when some enclosing step has it in the right operand and the left operand, under the truth value that step forces, proves the symbol non-empty — a recursion over `&&`/`||` whose true- and false-directions are asymmetric. A finding needs BOTH an uncovered access and a covered one on the same symbol in the same condition, which is the agreeing twin that separates a misplaced parenthesis from an unrelated length test. Bare index accesses with no emptiness test in the condition are neither counted nor reported; a non-identifier receiver and a lambda nested inside the condition are outside the population. Deterministic, provable per finding. Advisory.

X29 · Per-element action decided by a fixed element10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether a decision taken once per element is taken ABOUT that element — a test inside a counted loop that reads a fixed subscript of the very collection its guarded statement indexes by the loop variable applies element zero's answer to all of them, so the elements that differ from it are all handled wrongly, and in the same direction.

Method: Roslyn syntax only, no semantic model: every `for` statement declaring exactly ONE loop variable, and every `if` inside its body that is not under a nested loop or a lambda. A site enters the population when the `if`’s condition never mentions the loop variable while the statement it guards indexes some collection by that variable ALONE (`c[i]`; `c[i + 1]` and `c[i, j]` are outside it). A finding additionally needs the AGREEING TWIN at the same-collection grain: the condition must read THAT SAME collection at a subscript that does not move — written into the condition, or reached through a local declared BEFORE the loop, so an alias bound inside the body is not followed. Both collection expressions must be simple identifiers. On a repository with no .NET source the same rule reads JavaScript/TypeScript off the engine’s own token stream (tests included, bundles and vendored paths not): a `for (let|var|const x = …; …; …)` with one declarator and a braced body, an alias followed only when it is declared before the loop in a block that encloses it and never assigned inside the loop. Deterministic, provable per finding. Advisory.

X3 · Exception handling3.1 / 10Weak✓ Tool-verified

Other · Code Health — Whether exceptions are handled rather than silently swallowed or rethrown with lost stack traces.

Method: Roslyn syntax scan: every catch clause counted; empty catches and bare rethrows flagged. Population is all catch clauses, not estimated. Deterministic, hard fact.

  • `catch (Exception)` does nothing with the exception it caught — the body neither logs it, rethrows it, nor even names it, so the failure is discarded as completely as by an empty catch. Log it through whatever this codebase already uses to report problems, or let it propagate; if one specific failure genuinely cannot matter, catch exactly that exception type and say why in a comment on the catch. (×10) — N_m3u8DL-CLI/Global.cs:70, N_m3u8DL-CLI/Global.cs:76, N_m3u8DL-CLI/DownloadManager.cs:304, …
  • An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it. (×15) — N_m3u8DL-CLI/Global.cs:452, N_m3u8DL-CLI/Global.cs:720, N_m3u8DL-CLI/Global.cs:722, …

What to do

  • Swallowed exception (caught, then discarded)
X30 · Support guard that admits what it rejects10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether a guard written as a NEGATED `||` says what its author meant — `!(a || b || x != k)` is `!a && !b && x == k` by De Morgan, so a bail-out that mixes capabilities the code needs with a fault it refuses turns inside out: it fires only where the capabilities are ABSENT, and lets every value the fault term names walk straight into the body that cannot handle it.

Method: Roslyn syntax only, no semantic model: every logical-not whose operand is a parenthesised `||` chain of two or more disjuncts, flattened (a left-nested `a || b || c` read once would see `(a || b)` as one disjunct). A site enters the population on that shape alone. A finding additionally needs the disjuncts to DISAGREE in polarity: at least one bare boolean read — an identifier or member access, never an invocation, which is a predicate rather than a capability flag — and at least one `x != <constant>`, the only form that negates into an exact-value pin (`== null` negates into a looser requirement and is outside the fault set). Consistently-polarised disjunctions, all-fault or all-capability, are counted and never reported; a negated `&&` is outside the population entirely. No same-receiver gate: it was measured to cost a real defect and remove no false positive. Deterministic, provable per finding. Advisory.

X32 · Type resolved by simple name across every loaded assembly10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether a plugin lookup names the type it means — searching every assembly loaded into the process for a candidate whose SIMPLE name equals a string supplied at runtime, and taking the first one found, is decided by assembly LOAD ORDER rather than by this source, so the same name can resolve to a different type on the next run.

Method: Roslyn syntax only, no semantic model: every invocation of `First`/`FirstOrDefault`/`Single`/`SingleOrDefault` whose OWN expression subtree contains both a `GetAssemblies()` call and a `GetTypes()`/`GetExportedTypes()` call — a single-element pick out of every type loaded into the process. A nested selector in the same chain sees no `GetAssemblies()` in its own subtree and is outside the population, so one lookup counts once however many links its chain has. A finding additionally needs both remaining halves: the selector must be `First`/`FirstOrDefault` (`Single`/`SingleOrDefault` reports the ambiguity rather than resolving it, and is counted and never reported), and the chain must carry an `==` comparison of `<lambda parameter>.Name` against something that is not a literal. The receiver must be a plain identifier bound by one of the chain’s own lambdas, which places `assembly.GetName().Name == "X"` outside the rule by construction. One exemption: a `.Name` test joined by `&&` to a `FullName`/`AssemblyQualifiedName` test on the same identifier is spared; joined by `||` it is not. Deterministic, provable per finding. Advisory.

X4 · Structured logging10.0 / 10Exemplary○ Nothing flagged

Other · Code Health — Whether log calls use message templates (queryable) rather than interpolated strings.

Method: Roslyn syntax scan: every log call-site counted; interpolated-string first-argument violations flagged. Population is all log calls, not estimated. On a repository with no .NET source it reads JavaScript/TypeScript off the engine’s own token stream (test, vendored and minified paths not) with the same rule: a `trace`/`debug`/`info`/`warn`/`error`/`fatal`/`verbose`/`silly`/`http`/`log` call on a receiver named for a logger, in a package whose own or an enclosing `package.json` declares a logger that carries values as fields (pino, pino-http, nestjs-pino, Fastify, winston, bunyan, tslog, LogTape, roarr), whose first deciding argument is a template literal with substitutions; an object-literal fields argument is stepped over, a plain string message clears the call. Python is read the same way: a `debug`/`info`/`warning`/`error`/`exception`/`critical`/`log` call on a logger in a file that imports the standard library’s `logging` or structlog (loguru, which formats at the call, is not judged), whose message is a whole f-string with a non-constant field; a `%`-formatted, `.format()`-ed or concatenated message is not convicted, as in C#. PHP is read the same way: a PSR-3 level call (`emergency`…`debug`, `log`) on a logger (`$logger`, `$this->logger`, Laravel’s `Log::`, `logger()`, `\Drupal::logger()`) in a package whose `composer.json` requires a PSR-3 logger or a framework that hands one out (psr/log, Monolog, Laravel, Symfony, Drupal, CakePHP), or a file that imports one, whose message is a double-quoted string interpolating a variable; a single-quoted message clears the call, and `sprintf` or `.` concatenation is not convicted, as in C#. Dart is read the same way: a `trace`/`debug`/`info`/`warn`/`error`/`fatal` call on Sentry’s structured logger (`Sentry.logger`) whose message is a whole string literal interpolating a value (`$name`, `${…}`); the `Sentry.logger.fmt` template API clears the call. Dart that logs only through loggers with one message and no fields (package:logging, package:logger, talker, dart:developer) is not applicable rather than a reach gap. Ruby is read the same way: a `trace`/`debug`/`info`/`warn`/`error`/`fatal` call on the console gem’s `Console` (declared by a Gemfile, gemspec or Gemfile.lock, or required) or, where SemanticLogger, Ougai or dry-logger is declared or required, on a receiver named for a logger (`logger`, `@logger`, `Rails.logger`, `log`), whose first deciding argument is, as the whole argument, a double-quoted string interpolating a non-constant value (`#{…}`, `#@ivar`); a plain literal clears the call, keyword arguments are the fields, and a block, `%`-format or `+` concatenation is not convicted. Ruby that logs only through the standard Logger (Rails.logger) is not applicable rather than a reach gap. Deterministic.

Reference — by lens

The score is the rank-weighted fold of these lenses (worst-heaviest), each including its meta-dimensions; a lens with a Critical contributor is capped at Fair (its band reads "gated by …") and is never the strongest area however high its average.

LensScoreRatingImpact
Code Health56%Adequate — gated by D1, D2, X3Capped at Fair by a Critical contributor — resolve it before relying on this lens.
Architecture100%ExemplaryStrongest area.
Maturity22%Critical — gated by D15, D34, M2Capped at Fair by a Critical contributor — resolve it before relying on this lens.
Readiness28%Weak — gated by D8, D9, P2, P3Capped at Fair by a Critical contributor — resolve it before relying on this lens.
Security50%Adequate — gated by S1Capped at Fair by a Critical contributor — resolve it before relying on this lens.
Performance100%ExemplarySolid.
Unscored — 4 check(s) recorded observations but carry no score

These checks ran and found something, but they do not carry a score — either by design (an advisory check reports evidence rather than grading it) or because they could not be scored here. They are excluded from the score for that reason, not because there was nothing to see.

  • D36 Supply-chain Provenance & Signing — 1 observation(s) recorded · The CI pipeline builds and tests but publishes no released artifact — no package publish, container push, GitHub release or deployment step. Supply-chain provenance, signing and SBOM attest RELEASED artifacts, so there is nothing to attest here. Add them to the release pipeline when this repo starts shipping artifacts (a published package, a container image, a deployed service or a tagged release). Build integrity and workflow-token hygiene are reported below: they describe what the CI runs and the token it runs with, neither of which is affected by whether the pipeline ships an artifact.
  • SC1 Supply-chain hygiene — 1 observation(s) recorded · Advisory — this card reports evidence and never carries a score, so there is nothing missing here.
  • X10 Duplicated predicate — 1 observation(s) recorded · Advisory — this card reports evidence and never carries a score.
  • X7 Silent fallback defaults — 2 observation(s) recorded · Advisory — this card reports evidence and never carries a score.
Not evidenced — 2 control(s) we could not find positive evidence for

These checks grade a working control, and the repository shows no evidence of one. That is deliberately not scored as a zero: a repository cannot show an ops runbook, a database TTL or an infrastructure-side audit log, so absence of evidence here is not evidence the control is missing. It is also not a statement that the check is irrelevant to this codebase — the thing it grades applies; we just could not see it. Excluded from the score either way.

  • P4 Deployment & Rollback — not evidenced — no deploy/rollback/approval signal in the repo; absence of evidence is not evidence of a manual release
  • P5 DR & Backup — not evidenced — repo shows no backup/RTO/RPO controls; absence of evidence is not evidence of a working control
Not included — 49 check(s) not relevant to this codebase

These checks had nothing to measure here (no tests, no git history, the codebase is small, or the architecture style doesn't apply), so they're omitted above rather than scored low.

  • AC1 Text alternatives — No web markup found — accessibility is not applicable to this repository.
  • AC2 Forms & labels — No web markup found — accessibility is not applicable to this repository.
  • AC3 Page structure — No web markup found — accessibility is not applicable to this repository.
  • AC4 Keyboard semantics — No web markup found — accessibility is not applicable to this repository.
  • AC5 ARIA correctness — No web markup found — accessibility is not applicable to this repository.
  • AC6 Visual & motion safety — No web markup found — accessibility is not applicable to this repository.
  • AC7 A11y enforcement — No web markup found — accessibility is not applicable to this repository.
  • AX1 Captive dependencies — no DI registrations detected
  • AX2 Stateful singletons — no singleton implementations detected
  • AX6 Interface segregation — no public interfaces
  • AX7 Slice cohesion — not applicable — not a vertical-slice architecture
  • AX8 Test isolation — no test/production split to check
  • AX9 CQS / query purity — no CQRS query handlers detected — query purity is not applicable to this codebase
  • AXB1 Runtime evidence locked — no reproducible boot — This repository has nothing the runtime tiers could boot or serve — no markup, no UI framework or web-server dependency, no UI component source, no native UI project and no API definition — nothing here is a surface to boot — so runtime a11y/egress/header evidence has no subject here. Not applicable: this is neither a gap in the scan nor a finding about your code.
  • C1 Data Protection — No personal data detected in the analyzed source — no PII-typed entity/column names (Email, FirstName, DateOfBirth, …), no ASP.NET Identity / user-account model, and no stored user credentials. GDPR data-protection controls are therefore N/A here. If this is intentional, record the no-PII posture in an ADR; if the app does process personal data, name those fields conventionally so this dimension activates.
  • C2 Access Controls — No access-control surface detected in the analyzed source — no web/app surface to authorize (no HTTP API or web-UI project) and no authorization code at all (no [Authorize]/policies, no imperative guard methods). Access control is therefore N/A here — this is a library/CLI, which is authorized by its CALLER, not by itself. If this codebase grows request handlers, the dimension reactivates and a default-deny posture is expected then.
  • C3 Audit Trail — No personal data detected in the analyzed source — no PII-typed entity/column names (Email, FirstName, DateOfBirth, …), no ASP.NET Identity / user-account model, and no stored user credentials. GDPR data-protection controls are therefore N/A here. If this is intentional, record the no-PII posture in an ADR; if the app does process personal data, name those fields conventionally so this dimension activates.
  • C4 Data Retention — No personal data detected in the analyzed source — no PII-typed entity/column names (Email, FirstName, DateOfBirth, …), no ASP.NET Identity / user-account model, and no stored user credentials. GDPR data-protection controls are therefore N/A here. If this is intentional, record the no-PII posture in an ADR; if the app does process personal data, name those fields conventionally so this dimension activates.
  • C5 Data-Subject Rights — No personal data detected in the analyzed source — no PII-typed entity/column names (Email, FirstName, DateOfBirth, …), no ASP.NET Identity / user-account model, and no stored user credentials. GDPR data-protection controls are therefore N/A here. If this is intentional, record the no-PII posture in an ADR; if the app does process personal data, name those fields conventionally so this dimension activates.
  • D10 Test Quality — No tests were found in the analyzed repository to assess for quality.
  • D11 Test Reliability — No test suite was found to re-run, so reliability couldn't be assessed. Two searches produced that zero and both came back empty: the classifier that reads the loaded workspace recognised no suite it could run, and a walk of the source on disk — which covers the JS/TS `*.test.*` and `*.spec.*` conventions and probes for a Pester suite — found no test source in any other ecosystem either. Neither search reaches a suite that is missing from the loaded workspace and carries no name either walk recognises, so this is 'no suite found by those two searches', not a verdict that the repository has none.
  • D12 Dependency Hygiene — Dependency hygiene not measured
  • D16 Bus Factor — single-maintainer repository — bus factor is not applicable
  • D22 Internal API Consistency — No intentionally-exposed public API to evaluate for consistency.
  • D23 Boundary Type-Coupling — small single-context codebase (6,576 production LoC in the .NET projects) — bounded contexts are not needed at this size No bounded-context organisation was detected either — neither a context-shaped layout, nor 2+ sibling source directories each declaring an aggregate root, nor 2+ projects each declaring an entity of their own. Declaring this codebase's bounded contexts (≥2) would let cross-boundary type coupling be assessed. Declare them in `.codehealth/config.yaml` at the repository root (create it if absent), mapping each context name to the module-path or namespace prefixes that belong to it — e.g. `architecture:` → `contexts:` → `Billing: ["src/billing", "Acme.Billing"]`, `Catalog: ["src/catalog", "Acme.Catalog"]`.
  • D25 ADR Conformance — no ADRs to check
  • D27 Navigability — symbol resolution incomplete — navigability not assessed
  • D31 IaC & Container Security — No Infrastructure-as-Code or container manifests found (Dockerfile, Docker Compose, Terraform, Kubernetes/Helm, CloudFormation, ARM, Bicep, Ansible); nothing to scan.
  • D32 Data Compliance (PII/GDPR) — No personal data was found crossing a boundary the PII/GDPR ruleset checks — nothing written to a log or console sink, placed in a URL or query string, or persisted to browser storage. That is a clean result for the LEAK surface only: this ruleset detects personal data escaping, it does not inventory the personal data a repository holds, so it is not evidence that this repository has no personal-data surface. The personal-data map (Appendix C) and the C1-C5 compliance cards are what speak to that.
  • D37 Vulnerability-disclosure Policy — No vulnerability-disclosure policy file found (SECURITY.md/.markdown/.rst/.txt at root or under .github/.forgejo/.gitea/docs, .well-known/security.txt). A coordinated-disclosure policy may live off-repo, so this is not evidenced rather than failed.
  • D39 IL Efficiency — IL not measured — the analyzer's build of the target did not succeed
  • D40 Network Egress Confinement — No Kubernetes/orchestration workloads found in the repository manifests; network egress policy is a cluster-native control that may live at the platform/firewall layer, so there is nothing to assess here.
  • D41 Kernel & Syscall Confinement — No Kubernetes/orchestration workloads found in the repository manifests; seccomp/AppArmor/SELinux confinement is a workload-level control, so there is nothing to assess here.
  • D42 Runtime Threat Enforcement — No Kubernetes/orchestration workloads found in the repository manifests; runtime threat-detection and admission-control policy are cluster-level controls, so there is nothing to assess here.
  • D44 Platform End-of-Life — Platform end-of-life not assessed — this repository declares no platform this pass reads
  • D7 Architectural Integrity — no checkable ADRs and no dependency cycles — architectural integrity not assessed
  • DM1 Domain Modelling — not scored — this repository shows none of the 3 signals this lens looks for
  • ED1 Event-Driven — not scored — this repository shows none of the 3 signals this lens looks for
  • ED5 Idempotency — no mutating command handlers or message consumers detected — idempotency check not applicable
  • ES1 Event Sourcing — not scored — this repository shows none of the 3 signals this lens looks for
  • P12 CI test-gate honesty — Reported, not scored — and nothing was matched here. The coverage check applies to any stack, and the automatic-re-run check to any GitHub-Actions workflow, but the checks for excluded tests, skipped tests and sleep-based synchronisation currently recognise only some ecosystems' test-runner idioms, so on a repository built with another stack the zeros below mean 'not checked', not 'clean'.
  • P7 Outbound HTTP resilience — not applicable — this isn't a service/API/worker
  • P8 Schema migrations — no EF Core usage detected
  • P9 Domain vs controller coverage — no coverage report found on disk — produce a coverage report in a standard format (Cobertura — `dotnet test --collect:"XPlat Code Coverage"` with a `coverlet.collector` PackageReference) and commit it — a hosted scan measures a clone of the repository, so a report that exists only in a working tree, a CI runner's or your own, never reaches it; the artefact is commonly gitignored, so `git add -f` that one file (or un-ignore its path) and commit it alongside the code it measures, or wire coverage collection into CI, to enable this cross-layer check
  • PF1 Benchmark discipline — Performance is assessed only for perf-relevant repos — a packaged library, one that ships benchmarks, or one already using allocation-aware APIs. This repo isn't one, so the Performance lens is not applicable and is excluded from the score.
  • PF2 Allocation hygiene — Performance is assessed only for perf-relevant repos — a packaged library, one that ships benchmarks, or one already using allocation-aware APIs. This repo isn't one, so the Performance lens is not applicable and is excluded from the score.
  • X5 Nullable reference types — no NRT-eligible projects
  • X6 Hand-rolled structured-format parsing — Advisory — this card reports evidence and never carries a score, so there is nothing missing here.
  • X9 Subsumed condition operand — Advisory — this card reports evidence and never carries a score, so there is nothing missing here.

Appendix A — Findings (grouped)

The findings behind the scores, grouped by severity, then by dimension and kind. The high-severity issues are enumerated in full below; items per group are capped at 25 with any overflow stated explicitly per group, never silently truncated. The complete machine-readable list of every finding (all severities) is the companion findings.md in this report's bundle.

Critical — 28 finding(s)
D17 · Explicit Debt · EmptyCatchBlock · ×15
  • EmptyCatchBlock N_m3u8DL-CLI/DownloadManager.cs:112 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/DownloadManager.cs:121 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/DownloadManager.cs:212 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/DownloadManager.cs:461 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/DownloadManager.cs:532 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/DownloadManager.cs:604 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/Global.cs:452 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/Global.cs:720 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/Global.cs:722 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/Global.cs:730 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/LOGGER.cs:70 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/LOGGER.cs:119 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/LOGGER.cs:144 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/Parser.cs:598 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
  • EmptyCatchBlock N_m3u8DL-CLI/ProgressReporter.cs:24 — empty catch block — the error is discarded with nothing recorded, so a failure here leaves no trace anywhere. Record it through whatever this codebase already uses to report problems, or let it propagate. Where swallowing one specific failure really is correct — as it often is on a teardown/dispose path where throwing would mask the original failure — catch exactly that exception type and write down WHY in a comment on the catch. Both are needed: a comment on a catch-all still swallows every failure nobody anticipated, and a note that only restates the swallow ("ignored", "do nothing") is read as no explanation at all.
D34 · Knowledge Freshness · Orphaned knowledge · ×6
  • Orphaned knowledge N_m3u8DL-CLI/Global.cs:1 — No living knowledge remains for this large file — its last meaningful change has decayed away; if it breaks, no one currently understands it. Schedule a read-through / add characterisation tests before it bites.
  • Orphaned knowledge N_m3u8DL-CLI/Parser.cs:1 — No living knowledge remains for this large file — its last meaningful change has decayed away; if it breaks, no one currently understands it. Schedule a read-through / add characterisation tests before it bites.
  • Orphaned knowledge REDACTED:1 — No living knowledge remains for this large file — its last meaningful change has decayed away; if it breaks, no one currently understands it. Schedule a read-through / add characterisation tests before it bites.
  • Orphaned knowledge N_m3u8DL-CLI/DownloadManager.cs:1 — No living knowledge remains for this large file — its last meaningful change has decayed away; if it breaks, no one currently understands it. Schedule a read-through / add characterisation tests before it bites.
  • Orphaned knowledge N_m3u8DL-CLI/CSChaCha20.cs:1 — No living knowledge remains for this large file — its last meaningful change has decayed away; if it breaks, no one currently understands it. Schedule a read-through / add characterisation tests before it bites.
  • Orphaned knowledge REDACTED:1 — No living knowledge remains for this large file — its last meaningful change has decayed away; if it breaks, no one currently understands it. Schedule a read-through / add characterisation tests before it bites.
D29 · Static Analysis (SAST) · REDACTED
  • REDACTED
  • REDACTED
  • REDACTED
  • REDACTED
D29 · Static Analysis (SAST) · REDACTED · ×1
  • REDACTED
D8 · Code Coverage · No automated tests · ×1
  • No automated tests — No automated tests — no test code was found in this repository. Untested code is the largest single risk to changing it safely. Start with the code you change most often: add a suite in a framework a runner can collect (xUnit, NUnit or MSTest), and run it in CI so the gap cannot reopen.
S1 · Cryptographic Hygiene · TLS certificate validation disabled · ×1
  • TLS certificate validation disabled REDACTED:55 — `ServerCertificateValidationCallback` is assigned `ValidateServerCertificate`, which returns `true` unconditionally, so every TLS peer certificate is accepted — including one an attacker presents. Chain, expiry, revocation and hostname are all skipped, so an attacker on the network path can present any certificate and read or rewrite the traffic — the connection is encrypted to the attacker, not to the intended host. Delete the override and let the platform validate. If a specific self-signed or internally-issued certificate genuinely has to be trusted, pin THAT one — compare the presented certificate's public key or thumbprint against the expected value and return `false` for everything else — and scope it to the single handler that talks to that host rather than to the whole process. If the override exists only to get past a development certificate, gate it on a build configuration or an explicit opt-in setting so it cannot ship.
Serious — 104 finding(s)
X3 · Exception handling · Swallowed exception (empty catch) · ×15
  • Swallowed exception (empty catch) N_m3u8DL-CLI/Global.cs:452 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/Global.cs:720 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/Global.cs:722 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/Global.cs:730 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/LOGGER.cs:70 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/LOGGER.cs:119 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/LOGGER.cs:144 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/DownloadManager.cs:112 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/DownloadManager.cs:121 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/DownloadManager.cs:212 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/DownloadManager.cs:461 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/DownloadManager.cs:532 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/DownloadManager.cs:604 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/Parser.cs:598 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
  • Swallowed exception (empty catch) N_m3u8DL-CLI/ProgressReporter.cs:24 — An empty catch block silently discards the error — failures vanish with no log and no rethrow. Log it, handle it, or don't catch it.
X3 · Exception handling · Swallowed exception (caught, then discarded) · ×10
  • Swallowed exception (caught, then discarded) N_m3u8DL-CLI/Global.cs:70 — `catch (Exception)` does nothing with the exception it caught — the body neither logs it, rethrows it, nor even names it, so the failure is discarded as completely as by an empty catch. Log it through whatever this codebase already uses to report problems, or let it propagate; if one specific failure genuinely cannot matter, catch exactly that exception type and say why in a comment on the catch.
  • Swallowed exception (caught, then discarded) N_m3u8DL-CLI/Global.cs:76 — `catch (Exception)` does nothing with the exception it caught — the body neither logs it, rethrows it, nor even names it, so the failure is discarded as completely as by an empty catch. Log it through whatever this codebase already uses to report problems, or let it propagate; if one specific failure genuinely cannot matter, catch exactly that exception type and say why in a comment on the catch.
  • Swallowed exception (caught, then discarded) N_m3u8DL-CLI/DownloadManager.cs:304 — `catch (Exception)` does nothing with the exception it caught — the body neither logs it, rethrows it, nor even names it, so the failure is discarded as completely as by an empty catch. Log it through whatever this codebase already uses to report problems, or let it propagate; if one specific failure genuinely cannot matter, catch exactly that exception type and say why in a comment on the catch.
  • Swallowed exception (caught, then discarded) N_m3u8DL-CLI/DownloadManager.cs:435 — `catch (Exception)` does nothing with the exception it caught — the body neither logs it, rethrows it, nor even names it, so the failure is discarded as completely as by an empty catch. Log it through whatever this codebase already uses to report problems, or let it propagate; if one specific failure genuinely cannot matter, catch exactly that exception type and say why in a comment on the catch.
  • Swallowed exception (caught, then discarded) N_m3u8DL-CLI/DownloadManager.cs:581 — `catch (Exception)` does nothing with the exception it caught — the body neither logs it, rethrows it, nor even names it, so the failure is discarded as completely as by an empty catch. Log it through whatever this codebase already uses to report problems, or let it propagate; if one specific failure genuinely cannot matter, catch exactly that exception type and say why in a comment on the catch.
  • Swallowed exception (caught, then discarded) REDACTED:575 — `catch (Exception)` does nothing with the exception it caught — the body neither logs it, rethrows it, nor even names it, so the failure is discarded as completely as by an empty catch. Log it through whatever this codebase already uses to report problems, or let it propagate; if one specific failure genuinely cannot matter, catch exactly that exception type and say why in a comment on the catch.
  • Swallowed exception (caught, then discarded) N_m3u8DL-CLI/Parser.cs:648 — `catch (Exception)` does nothing with the exception it caught — the body neither logs it, rethrows it, nor even names it, so the failure is discarded as completely as by an empty catch. Log it through whatever this codebase already uses to report problems, or let it propagate; if one specific failure genuinely cannot matter, catch exactly that exception type and say why in a comment on the catch.
  • Swallowed exception (caught, then discarded) N_m3u8DL-CLI/Parser.cs:685 — `catch (Exception)` does nothing with the exception it caught — the body neither logs it, rethrows it, nor even names it, so the failure is discarded as completely as by an empty catch. Log it through whatever this codebase already uses to report problems, or let it propagate; if one specific failure genuinely cannot matter, catch exactly that exception type and say why in a comment on the catch.
  • Swallowed exception (caught, then discarded) REDACTED:73 — `catch (Exception)` does nothing with the exception it caught — the body neither logs it, rethrows it, nor even names it, so the failure is discarded as completely as by an empty catch. Log it through whatever this codebase already uses to report problems, or let it propagate; if one specific failure genuinely cannot matter, catch exactly that exception type and say why in a comment on the catch.
  • Swallowed exception (caught, then discarded) REDACTED:129 — `catch (Exception)` does nothing with the exception it caught — the body neither logs it, rethrows it, nor even names it, so the failure is discarded as completely as by an empty catch. Log it through whatever this codebase already uses to report problems, or let it propagate; if one specific failure genuinely cannot matter, catch exactly that exception type and say why in a comment on the catch.
D17 · Explicit Debt · CommentedOutCode · ×6
  • CommentedOutCode N_m3u8DL-CLI/Downloader.cs:56 — 10 consecutive commented-code lines
  • CommentedOutCode N_m3u8DL-CLI/HLSLiveDownloader.cs:103 — 14 consecutive commented-code lines
  • CommentedOutCode N_m3u8DL-CLI/Parser.cs:108 — 4 consecutive commented-code lines
  • CommentedOutCode N_m3u8DL-CLI/Parser.cs:972 — 4 consecutive commented-code lines
  • CommentedOutCode N_m3u8DL-CLI/Parser.cs:221 — 5 consecutive commented-code lines
  • CommentedOutCode N_m3u8DL-CLI/Parser.cs:985 — 12 consecutive commented-code lines
D3 · God Classes · MethodTooLong · ×6
  • MethodTooLong: Parser.Parse N_m3u8DL-CLI/Parser.cs:74 — MethodTooLong — Parse runs 436 significant lines (blank, comment-only and punctuation-only lines excluded) in one body. The bar is 100 significant lines; this is 336 over it, 4.36× the bar. This is length, not branching: a long straight-line body scores low on complexity and is still read whole to change any part of it, so the complexity numbers beside this row neither confirm nor excuse it. To reduce it, extract each cohesive step of the body — the runs of statements that work on the same values and would earn the same name — into its own named unit, and have this one call them in order.
  • MethodTooLong: MPDParser.Parse REDACTED:130 — MethodTooLong — Parse runs 274 significant lines (blank, comment-only and punctuation-only lines excluded) in one body. The bar is 100 significant lines; this is 174 over it, 2.74× the bar. This is length, not branching: a long straight-line body scores low on complexity and is still read whole to change any part of it, so the complexity numbers beside this row neither confirm nor excuse it. To reduce it, extract each cohesive step of the body — the runs of statements that work on the same values and would earn the same name — into its own named unit, and have this one call them in order.
  • MethodTooLong: DownloadManager.IsComplete N_m3u8DL-CLI/DownloadManager.cs:322 — MethodTooLong — IsComplete runs 236 significant lines (blank, comment-only and punctuation-only lines excluded) in one body. The bar is 100 significant lines; this is 136 over it, 2.36× the bar. This is length, not branching: a long straight-line body scores low on complexity and is still read whole to change any part of it, so the complexity numbers beside this row neither confirm nor excuse it. To reduce it, extract each cohesive step of the body — the runs of statements that work on the same values and would earn the same name — into its own named unit, and have this one call them in order.
  • MethodTooLong: Program.DoWork REDACTED:200 — MethodTooLong — DoWork runs 163 significant lines (blank, comment-only and punctuation-only lines excluded) in one body. The bar is 100 significant lines; this is 63 over it, 1.63× the bar. This is length, not branching: a long straight-line body scores low on complexity and is still read whole to change any part of it, so the complexity numbers beside this row neither confirm nor excuse it. To reduce it, extract each cohesive step of the body — the runs of statements that work on the same values and would earn the same name — into its own named unit, and have this one call them in order.
  • MethodTooLong: DownloadManager.DoDownload N_m3u8DL-CLI/DownloadManager.cs:92 — MethodTooLong — DoDownload runs 151 significant lines (blank, comment-only and punctuation-only lines excluded) in one body. The bar is 100 significant lines; this is 51 over it, 1.51× the bar. This is length, not branching: a long straight-line body scores low on complexity and is still read whole to change any part of it, so the complexity numbers beside this row neither confirm nor excuse it. To reduce it, extract each cohesive step of the body — the runs of statements that work on the same values and would earn the same name — into its own named unit, and have this one call them in order.
  • MethodTooLong: Downloader.Down N_m3u8DL-CLI/Downloader.cs:70 — MethodTooLong — Down runs 116 significant lines (blank, comment-only and punctuation-only lines excluded) in one body. The bar is 100 significant lines; this is 16 over it, 1.16× the bar. This is length, not branching: a long straight-line body scores low on complexity and is still read whole to change any part of it, so the complexity numbers beside this row neither confirm nor excuse it. To reduce it, extract each cohesive step of the body — the runs of statements that work on the same values and would earn the same name — into its own named unit, and have this one call them in order.
D3 · God Classes · ClassTooLong · ×3
  • ClassTooLong: Parser N_m3u8DL-CLI/Parser.cs — ClassTooLong — 567 significant lines (blank, comment-only and punctuation-only lines excluded), 6 methods. The bar is 400 significant lines; this is 167 over it, 1.42× the bar. To reduce it, group the members that share the same data into a smaller type of their own and delegate to it, so no single type carries every responsibility.
  • ClassTooLong: MPDParser REDACTED — ClassTooLong — 472 significant lines (blank, comment-only and punctuation-only lines excluded), 9 methods. The bar is 400 significant lines; this is 72 over it, 1.18× the bar. The type holds no instance state, so there is no shared data to group its members by. To reduce it, split it by area instead: give each cohesive family of members its own smaller type, so no one type has to be read whole to change one of them.
  • ClassTooLong: DownloadManager N_m3u8DL-CLI/DownloadManager.cs — ClassTooLong — 444 significant lines (blank, comment-only and punctuation-only lines excluded), 3 methods. The bar is 400 significant lines; this is 44 over it, 1.11× the bar. To reduce it, group the members that share the same data into a smaller type of their own and delegate to it, so no single type carries every responsibility.
D4 · Code Duplication · Duplicated block (12 lines × 2) · ×3
  • Duplicated block (12 lines × 2) N_m3u8DL-CLI/Decrypter.cs:20 — N_m3u8DL-CLI/Decrypter.cs:20-31 | N_m3u8DL-CLI/Decrypter.cs:37-48 — both copies are in the same file, so extract the block into one function there and call it from each site — the copies drift apart the first time only one of them is edited. Read the line range as the matched WINDOW rather than a finished unit: at `N_m3u8DL-CLI/Decrypter.cs:20` it runs out through the closing brace of the declaration holding it — the window is that declaration's tail, not a fragment that begins part-way through something, so those exact lines cannot be lifted as they stand — widen the region to the smallest complete statement or declaration that contains it, and extract that. The `return` at the foot of the matched lines is the enclosing body's own terminal exit, not an early one: it moves with them unchanged, and each site calls the extracted unit from the position that `return` occupied — no decision has to be handed back and re-acted on.
  • Duplicated block (12 lines × 2) N_m3u8DL-CLI/DownloadManager.cs:424 — N_m3u8DL-CLI/DownloadManager.cs:424-435 | N_m3u8DL-CLI/DownloadManager.cs:570-581 — both copies are in the same file, so extract the block into one function there and call it from each site — the copies drift apart the first time only one of them is edited. Read the line range as the matched WINDOW rather than a finished unit: at `N_m3u8DL-CLI/DownloadManager.cs:424` it begins part-way through the construct above it, so those exact lines cannot be lifted as they stand — widen the region to the smallest complete statement or declaration that contains it, and extract that.
  • Duplicated block (12 lines × 2) N_m3u8DL-CLI/IqJsonParser.cs:88 — N_m3u8DL-CLI/IqJsonParser.cs:88-99 | REDACTED:654-665 — the copies sit in sibling files of one directory, so a shared home is within easy reach: extract the block into a single shared function the call sites can all reach — a file they already depend on, or a new one alongside them — and call it from both call sites, so a change lands once. Read the line range as the matched WINDOW rather than a finished unit: at `N_m3u8DL-CLI/IqJsonParser.cs:88` it does not close everything it opens, so those exact lines cannot be lifted as they stand — widen the region to the smallest complete statement or declaration that contains it, and extract that. ★ These copies have DRIFTED, and that is worth reading before extracting anything: just after the matched lines, `N_m3u8DL-CLI/IqJsonParser.cs:101` calls `Combine`, `Copy`, `Uri` and `REDACTED:667` does not — after which the two agree again for 2 more lines. One of those two behaviours is the intended one and the other is what a copy-paste left behind, so decide which BEFORE unifying them: extracting the shared part will silently settle it, and if the copy that skips the call is the wrong one, that bug is already live.
D29 · Static Analysis (SAST) · REDACTED
  • REDACTED
  • REDACTED
D3 · God Classes · FileTooLong · ×2
  • FileTooLong: N_m3u8DL-CLI/Global.cs N_m3u8DL-CLI/Global.cs — FileTooLong — 682 significant lines (blank, comment-only and punctuation-only lines excluded). The bar is 500 significant lines; this is 182 over it, 1.36× the bar. To reduce it, split the file along the responsibilities already in it: move each cohesive group of declarations into its own sibling file in the same module or package, so no one file has to be read whole to change one of them.
  • FileTooLong: N_m3u8DL-CLI/Parser.cs N_m3u8DL-CLI/Parser.cs — FileTooLong — 589 significant lines (blank, comment-only and punctuation-only lines excluded). The bar is 500 significant lines; this is 89 over it, 1.18× the bar. To reduce it, split the file along the responsibilities already in it: move each cohesive group of declarations into its own sibling file in the same module or package, so no one file has to be read whole to change one of them.
D4 · Code Duplication · Duplicated block (19 lines × 2) · ×2
  • Duplicated block (19 lines × 2) N_m3u8DL-CLI/Parser.cs:633 — N_m3u8DL-CLI/Parser.cs:633-651 | N_m3u8DL-CLI/Parser.cs:670-688 — both copies are in the same file, so extract the block into one function there and call it from each site — the copies drift apart the first time only one of them is edited. Read the line range as the matched WINDOW rather than a finished unit: at `N_m3u8DL-CLI/Parser.cs:633` it runs out through the closing brace of the declaration holding it and carries on into the declaration that follows — the window is the tail of one member plus the head of the next, so no call can be substituted for those exact lines, and the smallest declaration that contains all of them is the type they sit in. The repeated unit is the member each site sits in: where those members' bodies are the same, move one whole member to the shared location and have the others delegate to it; where the copies are a run of near-identical overloads or wrappers that differ only in their signatures, the repetition IS the run — a one-line delegation has no helper inside it to lift — so generate the run from the set it enumerates, or accept it and keep each member's own documentation with it.
  • Duplicated block (19 lines × 2) N_m3u8DL-CLI/Global.cs:546 — N_m3u8DL-CLI/Global.cs:546-564 | N_m3u8DL-CLI/Global.cs:567-585 — both copies are in the same file, so extract the block into one function there and call it from each site — the copies drift apart the first time only one of them is edited. Read the line range as the matched WINDOW rather than a finished unit: at `N_m3u8DL-CLI/Global.cs:546` it runs out through the closing brace of the declaration holding it — the window is that declaration's tail, not a fragment that begins part-way through something, so those exact lines cannot be lifted as they stand — widen the region to the smallest complete statement or declaration that contains it, and extract that. ★ These copies have DRIFTED, and that is worth reading before extracting anything: just before the matched lines, `N_m3u8DL-CLI/Global.cs:546` calls `GZipStream` and `N_m3u8DL-CLI/Global.cs:567` does not — after which the two agree again for 2 more lines. One of those two behaviours is the intended one and the other is what a copy-paste left behind, so decide which BEFORE unifying them: extracting the shared part will silently settle it, and if the copy that skips the call is the wrong one, that bug is already live.
D4 · Code Duplication · Duplicated block (8 lines × 2) · ×2
  • Duplicated block (8 lines × 2) N_m3u8DL-CLI/FFmpeg.cs:98 — N_m3u8DL-CLI/FFmpeg.cs:98-105 | N_m3u8DL-CLI/FFmpeg.cs:110-117 — both copies are in the same file, so extract the block into one function there and call it from each site — the copies drift apart the first time only one of them is edited. Read the line range as the matched WINDOW rather than a finished unit: at `N_m3u8DL-CLI/FFmpeg.cs:98` it runs out through the closing brace of the declaration holding it — the window is that declaration's tail, not a fragment that begins part-way through something, so those exact lines cannot be lifted as they stand — widen the region to the smallest complete statement or declaration that contains it, and extract that.
  • Duplicated block (8 lines × 2) N_m3u8DL-CLI/Decode51CtoKey.cs:292 — N_m3u8DL-CLI/Decode51CtoKey.cs:292-299 | N_m3u8DL-CLI/DecodeDdyun.cs:29-36 — the copies sit in sibling files of one directory, so a shared home is within easy reach: extract the block into a single shared function the call sites can all reach — a file they already depend on, or a new one alongside them — and call it from both call sites, so a change lands once.
D4 · Code Duplication · Duplicated block (5 lines × 2) · ×2
  • Duplicated block (5 lines × 2) N_m3u8DL-CLI/IqJsonParser.cs:33 — N_m3u8DL-CLI/IqJsonParser.cs:33-37 | N_m3u8DL-CLI/IqJsonParser.cs:62-66 — both copies are in the same file, so extract the block into one function there and call it from each site — the copies drift apart the first time only one of them is edited.
  • Duplicated block (5 lines × 2) N_m3u8DL-CLI/CSChaCha20.cs:504 — N_m3u8DL-CLI/CSChaCha20.cs:504-508 | N_m3u8DL-CLI/CSChaCha20.cs:510-514 — both copies are in the same file, so extract the block into one function there and call it from each site — the copies drift apart the first time only one of them is edited.
S1 · Cryptographic Hygiene · Weak hash algorithm · ×2
  • Weak hash algorithm N_m3u8DL-CLI/Decode51CtoKey.cs:292 — MD5/SHA1 is constructed here, and both are collision-broken. If this digest protects anything — a signature, an integrity or tamper check, a credential, or any value an attacker can influence — that is a real weakness: use SHA-256+ for content integrity, or a KDF (PBKDF2/Argon2/BCrypt) for password storage. If it only derives a non-security identifier (a cache key, a file or mutex name), collision resistance carries no security consequence here; make that intent explicit instead — a non-cryptographic hash such as `System.IO.Hashing.XxHash64`/`Crc32` says it in code — since the algorithm alone cannot distinguish the two uses.
  • Weak hash algorithm N_m3u8DL-CLI/DecodeDdyun.cs:29 — MD5/SHA1 is constructed here, and both are collision-broken. If this digest protects anything — a signature, an integrity or tamper check, a credential, or any value an attacker can influence — that is a real weakness: use SHA-256+ for content integrity, or a KDF (PBKDF2/Argon2/BCrypt) for password storage. If it only derives a non-security identifier (a cache key, a file or mutex name), collision resistance carries no security consequence here; make that intent explicit instead — a non-cryptographic hash such as `System.IO.Hashing.XxHash64`/`Crc32` says it in code — since the algorithm alone cannot distinguish the two uses.
D1 · Cyclomatic Complexity · Parser.Parse (cyclomatic 160) · ×1
  • Parser.Parse (cyclomatic 160) N_m3u8DL-CLI/Parser.cs:74 — Parser.Parse has cyclomatic complexity 160 (threshold 15). To reduce it, separate the cases: extract each independent branch into its own named function, and where the body has guards that only reject input, fold those into early returns at the top.
D1 · Cyclomatic Complexity · MPDParser.Parse (cyclomatic 93) · ×1
  • MPDParser.Parse (cyclomatic 93) REDACTED:130 — MPDParser.Parse has cyclomatic complexity 93 (threshold 15). Of this number, 88 points are the body's own statements and 5 belong to 3 function literals inside it that branch. To reduce it, separate the cases: extract each independent branch into its own named function, and where the body has guards that only reject input, fold those into early returns at the top.
D1 · Cyclomatic Complexity · Global.HttpDownloadFile (cyclomatic 52) · ×1
  • Global.HttpDownloadFile (cyclomatic 52) N_m3u8DL-CLI/Global.cs:592 — Global.HttpDownloadFile has cyclomatic complexity 52 (threshold 15). To reduce it, split the body: these branches sit side by side rather than nested inside one another, so extracting each one on its own would leave a function per branch. Group the statements between the checks into named steps and move each step into its own function, so the body reads as a short sequence of named stages.
D1 · Cyclomatic Complexity · Program.DoWork (cyclomatic 48) · ×1
  • Program.DoWork (cyclomatic 48) REDACTED:200 — Program.DoWork has cyclomatic complexity 48 (threshold 15). To reduce it, separate the cases: extract each independent branch into its own named function, and where the body has guards that only reject input, fold those into early returns at the top.
D1 · Cyclomatic Complexity · DownloadManager.IsComplete (cyclomatic 46) · ×1
  • DownloadManager.IsComplete (cyclomatic 46) N_m3u8DL-CLI/DownloadManager.cs:322 — DownloadManager.IsComplete has cyclomatic complexity 46 (threshold 15). To reduce it, separate the cases: extract each independent branch into its own named function, and where the body has guards that only reject input, fold those into early returns at the top.
D1 · Cyclomatic Complexity · DownloadManager.DoDownload (cyclomatic 43) · ×1
  • DownloadManager.DoDownload (cyclomatic 43) N_m3u8DL-CLI/DownloadManager.cs:92 — DownloadManager.DoDownload has cyclomatic complexity 43 (threshold 15). Of this number, 33 points are the body's own statements and 10 belong to one function literal inside it that branches. To reduce it, separate the cases: extract each independent branch into its own named function, and where the body has guards that only reject input, fold those into early returns at the top.
D1 · Cyclomatic Complexity · Global.TrySkipPngHeader (cyclomatic 39) · ×1
  • Global.TrySkipPngHeader (cyclomatic 39) N_m3u8DL-CLI/Global.cs:744 — Global.TrySkipPngHeader has cyclomatic complexity 39 (threshold 15). To reduce it, name the conditions: bind each compound test to a well-named local or a small predicate function, so the body reads as a sequence of named decisions rather than a chain of operators.
D1 · Cyclomatic Complexity · Downloader.Down (cyclomatic 30) · ×1
  • Downloader.Down (cyclomatic 30) N_m3u8DL-CLI/Downloader.cs:70 — Downloader.Down has cyclomatic complexity 30 (threshold 15). To reduce it, separate the cases: extract each independent branch into its own named function, and where the body has guards that only reject input, fold those into early returns at the top.
D1 · Cyclomatic Complexity · Global.GetVideoInfo (cyclomatic 29) · ×1
  • Global.GetVideoInfo (cyclomatic 29) N_m3u8DL-CLI/Global.cs:862 — Global.GetVideoInfo has cyclomatic complexity 29 (threshold 15). To reduce it, separate the cases: extract each independent branch into its own named function, and where the body has guards that only reject input, fold those into early returns at the top.
D1 · Cyclomatic Complexity · FFmpeg.Merge (cyclomatic 27) · ×1
  • FFmpeg.Merge (cyclomatic 27) N_m3u8DL-CLI/FFmpeg.cs:21 — FFmpeg.Merge has cyclomatic complexity 27 (threshold 15). To reduce it, split the body: these branches sit side by side rather than nested inside one another, so extracting each one on its own would leave a function per branch. Group the statements between the checks into named steps and move each step into its own function, so the body reads as a short sequence of named stages.
D1 · Cyclomatic Complexity · Program.Main (cyclomatic 27) · ×1
  • Program.Main (cyclomatic 27) REDACTED:51 — Program.Main has cyclomatic complexity 27 (threshold 15). To reduce it, separate the cases: extract each independent branch into its own named function, and where the body has guards that only reject input, fold those into early returns at the top.
D1 · Cyclomatic Complexity · MPDParser.GenerateM3u8 (cyclomatic 25) · ×1
  • MPDParser.GenerateM3u8 (cyclomatic 25) REDACTED:680 — MPDParser.GenerateM3u8 has cyclomatic complexity 25 (threshold 15). To reduce it, separate the cases: extract each independent branch into its own named function, and where the body has guards that only reject input, fold those into early returns at the top.
D1 · Cyclomatic Complexity · Global.GetWebSource (cyclomatic 24) · ×1
  • Global.GetWebSource (cyclomatic 24) N_m3u8DL-CLI/Global.cs:142 — Global.GetWebSource has cyclomatic complexity 24 (threshold 15). To reduce it, separate the cases: extract each independent branch into its own named function, and where the body has guards that only reject input, fold those into early returns at the top.
D1 · Cyclomatic Complexity · Global.HttpDownloadFileToBytes (cyclomatic 17) · ×1
  • Global.HttpDownloadFileToBytes (cyclomatic 17) N_m3u8DL-CLI/Global.cs:472 — Global.HttpDownloadFileToBytes has cyclomatic complexity 17 (threshold 15). To reduce it, split the body: these branches sit side by side rather than nested inside one another, so extracting each one on its own would leave a function per branch. Group the statements between the checks into named steps and move each step into its own function, so the body reads as a short sequence of named stages.
D1 · Cyclomatic Complexity · MPDParser.ExtractMultisegmentInfo (cyclomatic 17) · ×1
  • MPDParser.ExtractMultisegmentInfo (cyclomatic 17) REDACTED:19 — MPDParser.ExtractMultisegmentInfo has cyclomatic complexity 17 (threshold 15). To reduce it, separate the cases: extract each independent branch into its own named function, and where the body has guards that only reject input, fold those into early returns at the top.
D15 · Churn × Complexity Hotspots · Hotspot · ×1
  • Hotspot: N_m3u8DL-CLI/Parser.cs N_m3u8DL-CLI/Parser.cs:74 — N_m3u8DL-CLI/Parser.cs changed 2 times in last 90 days, and the most complex body those changes touched has cyclomatic complexity 160 in Parser.Parse at line 74. 1 of those changes was a fix/bug commit, and the other 1 changed it for other reasons — this file is under both repair and feature pressure. Before the next change lands here, make sure the area it touches is under test, then split that area out of the file so the following change is smaller than this one — a file this often edited pays the complexity back every time. Counted over 2023-03-05..2023-06-03, the 90 days ending at the analysed commit. Reproduce with `git log --since='2023-03-05 17:30:51 +08:00' --until='2023-06-03 17:30:51 +08:00' --full-history --no-merges -- N_m3u8DL-CLI/Parser.cs`: merges are excluded because a merge re-states changes already counted at their own commits, and history is NOT path-simplified because a change that reached the file through a merged branch is still a change to it. That command counts raw commits and can read HIGHER than this row, which counts a cherry-picked re-land, and a revert together with the commit it undoes, once each — a difference of several commits on a file whose history was re-landed or reverted inside the window.
D2 · Cognitive Complexity · MPDParser.Parse (cognitive 363) · ×1
  • MPDParser.Parse (cognitive 363) REDACTED:130 — MPDParser.Parse has cognitive complexity 363 (threshold 15). Of this number, 359 points are the body's own statements and 4 belong to 3 function literals inside it that branch. To reduce it, flatten the nesting: invert conditions into early returns or guard clauses so the happy path stays at one level, and lift the deepest nested block into its own named function.
D2 · Cognitive Complexity · Parser.Parse (cognitive 276) · ×1
  • Parser.Parse (cognitive 276) N_m3u8DL-CLI/Parser.cs:74 — Parser.Parse has cognitive complexity 276 (threshold 15). To reduce it, split the body into named stages: move each independent step or branch into its own named function so the body reads as a short sequence of named calls rather than one long body.
D2 · Cognitive Complexity · DownloadManager.IsComplete (cognitive 168) · ×1
  • DownloadManager.IsComplete (cognitive 168) N_m3u8DL-CLI/DownloadManager.cs:322 — DownloadManager.IsComplete has cognitive complexity 168 (threshold 15). To reduce it, flatten the nesting: invert conditions into early returns or guard clauses so the happy path stays at one level, and lift the deepest nested block into its own named function.
D2 · Cognitive Complexity · Program.DoWork (cognitive 74) · ×1
  • Program.DoWork (cognitive 74) REDACTED:200 — Program.DoWork has cognitive complexity 74 (threshold 15). To reduce it, flatten the nesting: invert conditions into early returns or guard clauses so the happy path stays at one level, and lift the deepest nested block into its own named function.
D2 · Cognitive Complexity · DownloadManager.DoDownload (cognitive 68) · ×1
  • DownloadManager.DoDownload (cognitive 68) N_m3u8DL-CLI/DownloadManager.cs:92 — DownloadManager.DoDownload has cognitive complexity 68 (threshold 15). Of this number, 50 points are the body's own statements and 18 belong to one function literal inside it that branches. To reduce it, split the body into named stages: move each independent step or branch into its own named function so the body reads as a short sequence of named calls rather than one long body.
D2 · Cognitive Complexity · Downloader.Down (cognitive 54) · ×1
  • Downloader.Down (cognitive 54) N_m3u8DL-CLI/Downloader.cs:70 — Downloader.Down has cognitive complexity 54 (threshold 15). To reduce it, flatten the nesting: invert conditions into early returns or guard clauses so the happy path stays at one level, and lift the deepest nested block into its own named function.
D2 · Cognitive Complexity · Global.HttpDownloadFile (cognitive 53) · ×1
  • Global.HttpDownloadFile (cognitive 53) N_m3u8DL-CLI/Global.cs:592 — Global.HttpDownloadFile has cognitive complexity 53 (threshold 15). To reduce it, split the body: most of this score is breadth rather than depth — checks laid out side by side rather than stacked — so group the statements between the checks into named steps and move each step into its own function. Some of it IS depth: where a check sits inside another whose only job is to reach it, merge the two into one condition, and where an else follows a branch that already returns, drop the trailing else and let the rest of the body continue at one level.
D2 · Cognitive Complexity · Global.GetWebSource (cognitive 44) · ×1
  • Global.GetWebSource (cognitive 44) N_m3u8DL-CLI/Global.cs:142 — Global.GetWebSource has cognitive complexity 44 (threshold 15). To reduce it, split the body into named stages: move each independent step or branch into its own named function so the body reads as a short sequence of named calls rather than one long body.
D2 · Cognitive Complexity · Program.Main (cognitive 42) · ×1
  • Program.Main (cognitive 42) REDACTED:51 — Program.Main has cognitive complexity 42 (threshold 15). To reduce it, split the body into named stages: move each independent step or branch into its own named function so the body reads as a short sequence of named calls rather than one long body.
D2 · Cognitive Complexity · Parser.ParseKey (cognitive 41) · ×1
  • Parser.ParseKey (cognitive 41) N_m3u8DL-CLI/Parser.cs:810 — Parser.ParseKey has cognitive complexity 41 (threshold 15). To reduce it, flatten the nesting: invert conditions into early returns or guard clauses so the happy path stays at one level, and lift the deepest nested block into its own named function.
D2 · Cognitive Complexity · MPDParser.GenerateM3u8 (cognitive 39) · ×1
  • MPDParser.GenerateM3u8 (cognitive 39) REDACTED:680 — MPDParser.GenerateM3u8 has cognitive complexity 39 (threshold 15). To reduce it, split the body into named stages: move each independent step or branch into its own named function so the body reads as a short sequence of named calls rather than one long body.
D2 · Cognitive Complexity · MPDParser.ExtractMultisegmentInfo (cognitive 37) · ×1
  • MPDParser.ExtractMultisegmentInfo (cognitive 37) REDACTED:19 — MPDParser.ExtractMultisegmentInfo has cognitive complexity 37 (threshold 15). To reduce it, split the body into named stages: move each independent step or branch into its own named function so the body reads as a short sequence of named calls rather than one long body.
D2 · Cognitive Complexity · Global.GetVideoInfo (cognitive 35) · ×1
  • Global.GetVideoInfo (cognitive 35) N_m3u8DL-CLI/Global.cs:862 — Global.GetVideoInfo has cognitive complexity 35 (threshold 15). To reduce it, split the body into named stages: move each independent step or branch into its own named function so the body reads as a short sequence of named calls rather than one long body.
D2 · Cognitive Complexity · Global.HttpDownloadFileToBytes (cognitive 26) · ×1
  • Global.HttpDownloadFileToBytes (cognitive 26) N_m3u8DL-CLI/Global.cs:472 — Global.HttpDownloadFileToBytes has cognitive complexity 26 (threshold 15). To reduce it, split the body: most of this score is breadth rather than depth — checks laid out side by side rather than stacked — so group the statements between the checks into named steps and move each step into its own function. Some of it IS depth: where a check sits inside another whose only job is to reach it, merge the two into one condition, and where an else follows a branch that already returns, drop the trailing else and let the rest of the body continue at one level.
D2 · Cognitive Complexity · ChaCha20.WorkBytes (cognitive 20) · ×1
  • ChaCha20.WorkBytes (cognitive 20) N_m3u8DL-CLI/CSChaCha20.cs:408 — ChaCha20.WorkBytes has cognitive complexity 20 (threshold 15). To reduce it, break up the iteration: give each loop body a named function, and split a multi-phase loop into one function per phase so no single body carries the whole pipeline.
D2 · Cognitive Complexity · Global.TrySkipPngHeader (cognitive 17) · ×1
  • Global.TrySkipPngHeader (cognitive 17) N_m3u8DL-CLI/Global.cs:744 — Global.TrySkipPngHeader has cognitive complexity 17 (threshold 15). To reduce it, split the body: this score is breadth rather than depth — many checks laid out side by side rather than nested inside one another, so inverting conditions into early returns has nothing left to flatten. Group the statements between the checks into named steps and move each step into its own function, so the body reads as a short sequence of named stages.
D29 · Static Analysis (SAST) · REDACTED · ×1
  • REDACTED
D29 · Static Analysis (SAST) · REDACTED · ×1
  • REDACTED
D3 · God Classes · TooManyMethods · ×1
  • TooManyMethods: Global N_m3u8DL-CLI/Global.cs — TooManyMethods — 636 significant lines (blank, comment-only and punctuation-only lines excluded), 34 methods. The bar is 30 methods; this is 4 over it, 1.13× the bar. The type holds no instance state, so there is no shared data to group its members by. To reduce it, split it by area instead: give each cohesive family of members its own smaller type, so no one type has to be read whole to change one of them.
D36 · Supply-chain Provenance & Signing REDACTED · ×1
  • REDACTED
D4 · Code Duplication · Duplicated block (64 lines × 2) · ×1
  • Duplicated block (64 lines × 2) N_m3u8DL-CLI/DownloadManager.cs:449 — N_m3u8DL-CLI/DownloadManager.cs:449-512 | N_m3u8DL-CLI/DownloadManager.cs:592-655 — both copies are in the same file, so extract the block into one function there and call it from each site — the copies drift apart the first time only one of them is edited.
D4 · Code Duplication · Duplicated block (18 lines × 2) · ×1
  • Duplicated block (18 lines × 2) N_m3u8DL-CLI/DownloadManager.cs:187 — N_m3u8DL-CLI/DownloadManager.cs:187-204 | N_m3u8DL-CLI/DownloadManager.cs:271-288 — both copies are in the same file, so extract the block into one function there and call it from each site — the copies drift apart the first time only one of them is edited. ★ These copies have DRIFTED, and that is worth reading before extracting anything: just before the matched lines, `N_m3u8DL-CLI/DownloadManager.cs:186` calls `Downloader` and `N_m3u8DL-CLI/DownloadManager.cs:270` does not — after which the two agree again for 2 more lines. One of those two behaviours is the intended one and the other is what a copy-paste left behind, so decide which BEFORE unifying them: extracting the shared part will silently settle it, and if the copy that skips the call is the wrong one, that bug is already live.
D4 · Code Duplication · Duplicated block (14 lines × 3) · ×1
  • Duplicated block (14 lines × 3) N_m3u8DL-CLI/Watcher.cs:55 — N_m3u8DL-CLI/Watcher.cs:55-68 | N_m3u8DL-CLI/Watcher.cs:75-88 | N_m3u8DL-CLI/Watcher.cs:95-108 — all 3 copies are in the same file, so extract the block into one function there and call it from every one of those sites — resolving only two of them leaves the rest to drift apart the first time one is edited. Read the line range as the matched WINDOW rather than a finished unit: at `N_m3u8DL-CLI/Watcher.cs:55` it runs out through the closing brace of the declaration holding it — the window is that declaration's tail, not a fragment that begins part-way through something, so those exact lines cannot be lifted as they stand — widen the region to the smallest complete statement or declaration that contains it, and extract that.
D4 · Code Duplication · Duplicated block (11 lines × 3) · ×1
  • Duplicated block (11 lines × 3) N_m3u8DL-CLI/Global.cs:186 — N_m3u8DL-CLI/Global.cs:186-196 | N_m3u8DL-CLI/Global.cs:520-530 | N_m3u8DL-CLI/Global.cs:649-659 — all 3 copies are in the same file, so extract the block into one function there and call it from every one of those sites — resolving only two of them leaves the rest to drift apart the first time one is edited. Read the line range as the matched WINDOW rather than a finished unit: at `N_m3u8DL-CLI/Global.cs:186` it begins part-way through the construct above it, so those exact lines cannot be lifted as they stand — widen the region to the smallest complete statement or declaration that contains it, and extract that.
D4 · Code Duplication · Duplicated block (7 lines × 2) · ×1
  • Duplicated block (7 lines × 2) REDACTED:704 — REDACTED:704-710 | REDACTED:767-773 — both copies are in the same file, so extract the block into one function there and call it from each site — the copies drift apart the first time only one of them is edited. Read the line range as the matched WINDOW rather than a finished unit: at `REDACTED:704` it does not close everything it opens, so those exact lines cannot be lifted as they stand — widen the region to the smallest complete statement or declaration that contains it, and extract that.
D4 · Code Duplication · Duplicated block (4–5 lines × 3) · ×1
  • Duplicated block (4–5 lines × 3) N_m3u8DL-CLI/Global.cs:749 — N_m3u8DL-CLI/Global.cs:749-753 | N_m3u8DL-CLI/Global.cs:757-761 | N_m3u8DL-CLI/Global.cs:762-765 — all 3 copies are in the same file, so extract the block into one function there and call it from every one of those sites — resolving only two of them leaves the rest to drift apart the first time one is edited. Read the line range as the matched WINDOW rather than a finished unit: at `N_m3u8DL-CLI/Global.cs:749` it runs out through the closing brace of the declaration holding it and carries on into the declaration that follows — the window is the tail of one member plus the head of the next, so no call can be substituted for those exact lines, and the smallest declaration that contains all of them is the type they sit in. The repeated unit is the member each site sits in: where those members' bodies are the same, move one whole member to the shared location and have the others delegate to it; where the copies are a run of near-identical overloads or wrappers that differ only in their signatures, the repetition IS the run — a one-line delegation has no helper inside it to lift — so generate the run from the set it enumerates, or accept it and keep each member's own documentation with it.
P2 · Observability · No structured logging · ×1
  • No structured logging — No logging or diagnostics emission found. This repository ships a binary its users launch rather than a service you operate, so there is no operator to page — but when a run fails on a user's machine, neither they nor you have anything to read.
S1 · Cryptographic Hygiene · Obsolete TLS/SSL protocol version enabled · ×1
  • Obsolete TLS/SSL protocol version enabled REDACTED:57 — `SecurityProtocol` explicitly selects `SecurityProtocolType.Ssl3`, a protocol version that is broken (SSL 2.0/3.0) or withdrawn (TLS 1.0/1.1, RFC 8996). Offering an obsolete version does not merely permit it — it is what a downgrade attack negotiates, so the weakest version on the list is the one that decides the connection's strength. Stop pinning versions here: leave the protocol unset (`SecurityProtocolType.SystemDefault`, or simply do not assign it) so the connection uses the OS policy and picks up TLS 1.3 and future versions without a code change. Where a version must be named explicitly, name `Tls12` and `Tls13` only.
SC1 · Supply-chain hygiene · NuGet dependencies are not locked · ×1
  • NuGet dependencies are not locked — No packages.lock.json and no central package management — restores aren't reproducible or pinned (SSDF PW.4.4). Enable <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile> (commit the lockfile) or adopt Directory.Packages.props. Advisory — never scored.
X16 · Unfloored truncation loop · Truncation loop has no floor · ×1
  • Truncation loop has no floor — the value can be consumed entirely REDACTED:335 — `fileName` is shortened by one character per iteration here (line 337), and the loop's only exit is the length test on line 335 — where `fileName.Length` appears as a TERM of a larger expression, never compared against a bound of its own. So nothing stops the loop at one character: it runs until the test's other terms come under the bound WITHOUT any help from `fileName`, which leaves `fileName` as the empty string — and if they never do, the next iteration evaluates a negative length and throws `ArgumentOutOfRangeException`. Neither outcome announces itself, because truncating to nothing is not an error at the point it happens; it surfaces later, as a path that names no file, a key that matches nothing, or a record written blank. Give the loop a floor (`&& fileName.Length > 1`), or compute the length once and clamp it (`fileName = fileName[..Math.Max(1, budget)]`) — and decide explicitly what should happen when the budget cannot be met, rather than letting an empty value be the answer.
X18 · Disposal-pattern correctness · Finalizer on a type that owns no unmanaged resource · ×1
  • Finalizer on a type that owns no unmanaged resource N_m3u8DL-CLI/CSChaCha20.cs:522 — `ChaCha20` declares a finalizer (line 522), but nothing in the type is unmanaged: no `IntPtr`/`UIntPtr` or pointer field, no `SafeHandle`, no `HandleRef`, no `extern`/`DllImport` member and no `Marshal`/`GCHandle`/`NativeMemory` use. A finalizer can only release what the garbage collector cannot, so on a purely-managed type it releases nothing and costs something: every instance is put on the finalizer queue, survives at least one extra collection, and is then finalized on a thread that is NOT the disposing one — where the managed objects it touches may already have been finalized themselves. Delete the finalizer (and the `GC.SuppressFinalize` that exists to defuse it); if a handle is added later, wrap it in a `SafeHandle`, which brings its own correct finalization.
X19 · Unrestored process-global state · Process-global state is restored only on the happy path · ×1
  • Process-global state is restored only on the happy path N_m3u8DL-CLI/FFmpeg.cs:124 — `Run` changes state that belongs to the whole PROCESS and changes it back at the end of the same body — the process working directory (changed at line 127, put back at line 144) and the `FFREPORT` environment variable (set at line 130, cleared at line 143) — which says the change was meant to last no longer than this call. But the restore is an ordinary statement on the straight-line path, not a `finally`, so it is skipped by any exception thrown in between: the process then keeps the overwritten value for the rest of its life, and every later relative path, child-process launch or config read in ANY code resolves against it. That failure is silent and remote from its cause — the method that breaks is not the method that moved the directory. The window is also not private to this call while it is open: the working directory and the environment block are per-process, not per-thread, so a concurrent thread doing file I/O during it resolves against the wrong directory too. The durable fix is not to widen the restore but to stop mutating the global: pass the value to the operation that needs it — `ProcessStartInfo.WorkingDirectory` and `ProcessStartInfo.Environment` scope both to the CHILD — or build absolute paths. Where the global genuinely must move, wrap it `try`/`finally` so the restore runs on every path.
X2 · Cancellation propagation · Async method without CancellationToken · ×1
  • Async method without CancellationToken: WorkStreamsAsync N_m3u8DL-CLI/CSChaCha20.cs:383 — No CancellationToken parameter — this work can't be stopped early once started.
Minor — 67 finding(s)
IC1 · Incompleteness & stubs · Commented-out code · ×40
  • Commented-out code N_m3u8DL-CLI/DownloadManager.cs:214 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/DownloadManager.cs:301 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/DownloadManager.cs:438 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/DownloadManager.cs:440 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/DownloadManager.cs:595 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Downloader.cs:60 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Downloader.cs:67 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Downloader.cs:84 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Downloader.cs:95 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Downloader.cs:109 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Downloader.cs:114 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Downloader.cs:120 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Downloader.cs:140 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Downloader.cs:143 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Downloader.cs:199 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Downloader.cs:230 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/FFmpeg.cs:89 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/FFmpeg.cs:131 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Global.cs:100 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Global.cs:109 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Global.cs:123 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Global.cs:131 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Global.cs:405 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Global.cs:408 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • Commented-out code N_m3u8DL-CLI/Global.cs:677 — A line of code has been commented out rather than removed — dead weight that rots and confuses. Delete it (version control remembers).
  • + 15 more in this group — see findings.md.
D34 · Knowledge Freshness · Orphaned file · ×11
  • Orphaned file N_m3u8DL-CLI/Decode51CtoKey.cs:1 — No one still active in this repository holds living knowledge of this file: everyone who made a meaningful change to it has gone quiet, or what the current team did to it (moves, reformatting, log-level or import edits, renames) never needed understanding it. If it breaks, no one currently understands it. Attach the read to the next change that touches it: have a second person review that change, and leave behind a short comment or test recording what the file is for.
  • Orphaned file N_m3u8DL-CLI/Downloader.cs:1 — No one still active in this repository holds living knowledge of this file: everyone who made a meaningful change to it has gone quiet, or what the current team did to it (moves, reformatting, log-level or import edits, renames) never needed understanding it. If it breaks, no one currently understands it. Attach the read to the next change that touches it: have a second person review that change, and leave behind a short comment or test recording what the file is for.
  • Orphaned file N_m3u8DL-CLI/FFmpeg.cs:1 — No one still active in this repository holds living knowledge of this file: everyone who made a meaningful change to it has gone quiet, or what the current team did to it (moves, reformatting, log-level or import edits, renames) never needed understanding it. If it breaks, no one currently understands it. Attach the read to the next change that touches it: have a second person review that change, and leave behind a short comment or test recording what the file is for.
  • Orphaned file N_m3u8DL-CLI/DecodeImooc.cs:1 — No one still active in this repository holds living knowledge of this file: everyone who made a meaningful change to it has gone quiet, or what the current team did to it (moves, reformatting, log-level or import edits, renames) never needed understanding it. If it breaks, no one currently understands it. Attach the read to the next change that touches it: have a second person review that change, and leave behind a short comment or test recording what the file is for.
  • Orphaned file N_m3u8DL-CLI/HLSLiveDownloader.cs:1 — No one still active in this repository holds living knowledge of this file: everyone who made a meaningful change to it has gone quiet, or what the current team did to it (moves, reformatting, log-level or import edits, renames) never needed understanding it. If it breaks, no one currently understands it. Attach the read to the next change that touches it: have a second person review that change, and leave behind a short comment or test recording what the file is for.
  • Orphaned file N_m3u8DL-CLI/LOGGER.cs:1 — No one still active in this repository holds living knowledge of this file: everyone who made a meaningful change to it has gone quiet, or what the current team did to it (moves, reformatting, log-level or import edits, renames) never needed understanding it. If it breaks, no one currently understands it. Attach the read to the next change that touches it: have a second person review that change, and leave behind a short comment or test recording what the file is for.
  • Orphaned file N_m3u8DL-CLI/IqJsonParser.cs:1 — No one still active in this repository holds living knowledge of this file: everyone who made a meaningful change to it has gone quiet, or what the current team did to it (moves, reformatting, log-level or import edits, renames) never needed understanding it. If it breaks, no one currently understands it. Attach the read to the next change that touches it: have a second person review that change, and leave behind a short comment or test recording what the file is for.
  • Orphaned file N_m3u8DL-CLI/Watcher.cs:1 — No one still active in this repository holds living knowledge of this file: everyone who made a meaningful change to it has gone quiet, or what the current team did to it (moves, reformatting, log-level or import edits, renames) never needed understanding it. If it breaks, no one currently understands it. Attach the read to the next change that touches it: have a second person review that change, and leave behind a short comment or test recording what the file is for.
  • Orphaned file N_m3u8DL-CLI/MyOptions.cs:1 — No one still active in this repository holds living knowledge of this file: everyone who made a meaningful change to it has gone quiet, or what the current team did to it (moves, reformatting, log-level or import edits, renames) never needed understanding it. If it breaks, no one currently understands it. Attach the read to the next change that touches it: have a second person review that change, and leave behind a short comment or test recording what the file is for.
  • Orphaned file N_m3u8DL-CLI/Decrypter.cs:1 — No one still active in this repository holds living knowledge of this file: everyone who made a meaningful change to it has gone quiet, or what the current team did to it (moves, reformatting, log-level or import edits, renames) never needed understanding it. If it breaks, no one currently understands it. Attach the read to the next change that touches it: have a second person review that change, and leave behind a short comment or test recording what the file is for.
  • Orphaned file N_m3u8DL-CLI/DecodeCdeledu.cs:1 — No one still active in this repository holds living knowledge of this file: everyone who made a meaningful change to it has gone quiet, or what the current team did to it (moves, reformatting, log-level or import edits, renames) never needed understanding it. If it breaks, no one currently understands it. Attach the read to the next change that touches it: have a second person review that change, and leave behind a short comment or test recording what the file is for.
X7 · Silent fallback defaults · Silent fallback default in catch · ×2
  • Silent fallback default in catch REDACTED:837 — `IntOrNull` swallows every exception into `return -1;` — a data error becomes a silent behavior change with no trail. Log the failure or let validation throw.
  • Silent fallback default in catch REDACTED:849 — `DoubleOrNull` swallows every exception into `return -1;` — a data error becomes a silent behavior change with no trail. Log the failure or let validation throw.
D20 · ADR Quality · No ADRs found · ×1
  • No ADRs found — No ADRs found. No recognised ADR directory (`docs/adr/`, `docs/decisions/`, `adr/`, `docs/rfcs/`, an `ADR0001/` folder, or their siblings) exists anywhere in this tree. What was searched, so you can tell an empty log from a search that missed one: every directory under the tree (build output, dependencies and VCS metadata excepted), for a document that is either any non-index page inside a recognised ADR directory, whatever its name and however deeply nested (`docs/adr/use-postgres.md`, `docs/adr/2024/0001-x.md`); or a file anywhere whose name is ADR-shaped (`0001-use-postgres.md`, `adr-012-caching.md`); or, when neither turned anything up, a document carrying the decision-record signature (an "Architecture Decision Record" heading, or Status / Context / Decision / Consequences as section headings). A decision log that clears none of these — unnumbered files outside any recognised directory, without those headings — is not seen by this check and this row is then wrong. If that is your case, say so rather than renaming anything; otherwise, consider recording architectural decisions in `docs/adr/`.
D21 · Naming Consistency · Typo in property names · ×1
  • Typo in property names: 'Verison' is misspelled instead of 'Version'. This typo is consistently applied to both the success and failure state strings, but represents a spelling error in the codebase vocabulary. — Rename to 'newerVersionDownloaded' and 'newerVersionDownloadFailed' (symbols: Property: public string N_m3u8DL_CLI.strings.newerVerisonDownloaded, Property: public string N_m3u8DL_CLI.strings.newerVerisonDownloadFailed)
D21 · Naming Consistency · Inconsistent casing for the same concept (Initialization Vector). The private field uses lowercase 'iv' while the public property uses PascalCase 'Iv'. While C# conventions often differ for backing fields, having both exposed or used interchangeably in this manner suggests a lack of standardization in casing for this specific term. · ×1
  • Inconsistent casing for the same concept (Initialization Vector). The private field uses lowercase 'iv' while the public property uses PascalCase 'Iv'. While C# conventions often differ for backing fields, having both exposed or used interchangeably in this manner suggests a lack of standardization in casing for this specific term. — Standardize casing, e.g., use 'Iv' for both or ensure the private field is a true backing field not directly referenced by name in a way that implies equivalence. (symbols: Field: private string N_m3u8DL_CLI.Downloader.iv, Property: public string N_m3u8DL_CLI.Downloader.Iv)
D21 · Naming Consistency · Inconsistent casing for the same concept (HTTP Headers). The public property uses PascalCase 'Headers' while the private field uses camelCase 'headers'. This creates confusion about whether they are distinct or the same underlying data. · ×1
  • Inconsistent casing for the same concept (HTTP Headers). The public property uses PascalCase 'Headers' while the private field uses camelCase 'headers'. This creates confusion about whether they are distinct or the same underlying data. — Standardize to 'Headers' (PascalCase) for the property and ensure the backing field follows standard conventions (e.g., '_headers' or 'headers') without conflicting naming. (symbols: Property: public string N_m3u8DL_CLI.HLSLiveDownloader.Headers, Field: private string N_m3u8DL_CLI.HLSLiveDownloader.headers)
D21 · Naming Consistency · Inconsistent casing for the same concept (File URL). The public property uses PascalCase 'FileUrl' while the private field uses camelCase 'fileUrl'. · ×1
  • Inconsistent casing for the same concept (File URL). The public property uses PascalCase 'FileUrl' while the private field uses camelCase 'fileUrl'. — Standardize casing, e.g., use 'FileUrl' for the property and '_fileUrl' for the backing field. (symbols: Property: public string N_m3u8DL_CLI.Downloader.FileUrl, Field: private string N_m3u8DL_CLI.Downloader.fileUrl)
D34 · Knowledge Freshness · Further orphaned files (smaller) · ×1
  • Further orphaned files (smaller) — 11 smaller file(s) also have no living knowledge — folded into the freshness score and metrics rather than raised one row each — most significant first: N_m3u8DL-CLI/Decode51CtoKey.cs, N_m3u8DL-CLI/Downloader.cs, N_m3u8DL-CLI/FFmpeg.cs, N_m3u8DL-CLI/DecodeImooc.cs, N_m3u8DL-CLI/HLSLiveDownloader.cs, N_m3u8DL-CLI/LOGGER.cs, N_m3u8DL-CLI/IqJsonParser.cs, N_m3u8DL-CLI/Watcher.cs (and 3 more) (17 orphaned of 17 analysed files in total, counted over production source files of roughly 2,400 bytes or more, excluding vendored, generated and example/demo trees and test files identified by path convention, largest first; 17 of the 23 production source files in this repository met that bar). Attach the read to the next change that touches one of them: have a second person review that change, and leave behind a short comment or test recording what the file is for, so the knowledge comes back at the cost of a change you were making anyway.
D36 · Supply-chain Provenance & Signing · REDACTED · ×1
  • REDACTED
D9 · Test Distribution · No tests found · ×1
  • No tests found — No test suite could be collected — no discoverable tests to count. If this repository does test, wiring the suite to a framework a runner can collect (xUnit, NUnit or MSTest) is what makes it countable here; a pipeline step that invokes a runner is not evidence on its own, because a runner over an empty suite passes. Tests written as plain executables or shell/PowerShell harnesses are not collectible this way and are not scored here.
M2 · Architecture documentation · No ADRs · ×1
  • No ADRs — No Architecture Decision Records found — no conventional ADR directory, no numbered `NNNN-title` documents in any markup this check reads, and nothing ADR-shaped by content. Design rationale recorded elsewhere (a design-notes tree, a mailing list, pull-request discussion) is not visible to this check and is not re-findable per decision, so a future maintainer cannot ask why one choice was made and get an answer.
M2 · Architecture documentation · No architecture diagram/doc · ×1
  • No architecture diagram/doc — No C4/Structurizr/PlantUML/Mermaid/Graphviz/D2 diagram, no drawn diagram named for the architecture, no file named `architecture` or `design` in any markup this check reads, and nothing in the README, docs or contributor guides that announces the shape — no `## Architecture` heading, no "architecture overview"/"high-level design" phrasing, no "the architecture is …" introduction, no guided code tour. A shape laid out in prose that never names itself as the architecture is not visible to this check, and neither is one kept outside the repository, so this row reports the absence of a re-findable shape document — not evidence that nobody wrote the shape down.
M3 · Folder & project structure · No src/ separation · ×1
  • No src/ separation — Production code isn't grouped under a src/ folder — it all sits under N_m3u8DL-CLI/ alongside the root build files, so the conventional src/ boundary between the product and its tooling isn't drawn.
P3 · Security & performance tooling · No SAST · ×1
  • No SAST — No static application security testing detected. For this repository's stack, add CodeQL's csharp pack, or a .NET security analyzer package (or `semgrep --config=auto`, which runs on any language) as a CI step. What was searched, so you can tell an absence from a miss: the 798 CI workflow file(s) in this repository, and the scanner and linter configuration checked in beside them. A scan that runs outside CI, one configured in your forge's web UI rather than in a committed file, or a tool whose name is none of those this check carries, is not seen — if that is your case the row is wrong, and saying so is more useful than adding a second scanner.
X10 · Duplicated predicate · Duplicated predicate · ×1
  • Duplicated predicate N_m3u8DL-CLI/IqJsonParser.cs:88 — `(videoPath == "" && audioPath != "") || Global.VIDEO_TYPE == "IGNORE"` appears character-identically in 2 files — N_m3u8DL-CLI/IqJsonParser.cs, REDACTED. It is one line, so the duplication detector's token window never sees it; the copies drift when only one is corrected. Give the condition a name and one home.
X2 · Cancellation propagation · Not all async methods take a CancellationToken · ×1
  • Not all async methods take a CancellationToken — Only 0/1 async methods accept a CancellationToken, so in-flight work can't be stopped early when the caller gives up — whatever ends it in your host (shutdown signal, timeout, abandoned request, user cancel). Thread a token through the call chain and honour it at each await and loop; where a method genuinely cannot be interrupted, omitting it is a deliberate choice — judge against your hosting model.
Minor — 1 finding(s)
D19 · Documentation Quality · XML-doc coverage · ×1
  • XML-doc coverage: N_m3u8DL-CLI N_m3u8DL-CLI/N_m3u8DL-CLI.csproj — N_m3u8DL-CLI: 38 % XML-doc coverage (131/349).

Appendix B — Reproduction & audit trail

Every external tool invocation behind a deep-scan dimension — the tool, its captured version, the exact command, how many findings it yielded, and a link to the retained raw output. To reproduce any finding: check out the same commit and run the command shown (repo-relative — never an absolute scratch path). The complete raw scanner output is retained verbatim under artifacts/raw/ (indexed in artifacts/raw/index.json); per-invocation exit codes and wall-clock durations are in sidecar.json — kept out of this table so the rendered report stays byte-identical across runs of the same commit.

DimensionToolVersionCommandFindingsRaw output
D28 · Secrets (history)gitleaks—gitleaks detect --no-banner --config /opt/gitleaks-rules/watchdog-gitleaks.toml --report-format json --report-path /tmp/watchdog-gitleaks-248ca361f6aa4358a4aa98d31227bced/history.json --exit-code 0 --source .0artifacts/raw/gitleaks-history.json
D28 · Secrets (history)gitleaks—gitleaks detect --no-git --no-banner --config /opt/gitleaks-rules/watchdog-gitleaks.toml --report-format json --report-path /tmp/watchdog-gitleaks-248ca361f6aa4358a4aa98d31227bced/tree.json --exit-code 0 --source .0artifacts/raw/gitleaks-tree.json
D29 · Static Analysis (SAST)semgrep—semgrep --config /opt/semgrep-rules/security-audit.yml --config /opt/semgrep-rules/owasp-top-ten.yml --config /opt/semgrep-rules/watchdog-sast.yml --json --quiet --timeout 10 --timeout-threshold 3 --metrics off .9artifacts/raw/semgrep.json
D30 · Dependency Vulnerabilitiesnuget—nuget: not applicable — nuget: `dotnet list package --vulnerable` could not read this solution's dependency graph — it reported an error for at least one project and returned no package data at all (typically a packages.config / non-PackageReference project, which the command cannot read). An unreadable dependency graph is not a clean one; migrate the project(s) to PackageReference to enable this scan0—
D30 · Dependency Vulnerabilitiesosv-scanner—osv-scanner --format json --recursive --experimental-disable-plugins transitivedependency/requirements --experimental-disable-plugins dotnet/csproj --experimental-disable-plugins dotnet/nugetcpm .0artifacts/raw/osv-scanner.json
D31 · IaC & Container Securitytrivy—trivy: not applicable — No Infrastructure-as-Code or container manifests found (Dockerfile, Docker Compose, Terraform, Kubernetes/Helm, CloudFormation, ARM, Bicep, Ansible); nothing to scan.0—
D32 · Data Compliance (PII/GDPR)semgrep—semgrep: not applicable — No personal data was found crossing a boundary the PII/GDPR ruleset checks — nothing written to a log or console sink, placed in a URL or query string, or persisted to browser storage. That is a clean result for the LEAK surface only: this ruleset detects personal data escaping, it does not inventory the personal data a repository holds, so it is not evidence that this repository has no personal-data surface. The personal-data map (Appendix C) and the C1-C5 compliance cards are what speak to that.0—
D37 · Vulnerability-disclosure Policydisclosure—disclosure: not applicable — No vulnerability-disclosure policy file found (SECURITY.md/.markdown/.rst/.txt at root or under .github/.forgejo/.gitea/docs, .well-known/security.txt). A coordinated-disclosure policy may live off-repo, so this is not evidenced rather than failed.0—
D40 · Network Egress Confinementruntime-hardening—runtime-hardening: not applicable — No Kubernetes/orchestration workloads found in the repository manifests; network egress policy is a cluster-native control that may live at the platform/firewall layer, so there is nothing to assess here.0—
D41 · Kernel & Syscall Confinementruntime-hardening—runtime-hardening: not applicable — No Kubernetes/orchestration workloads found in the repository manifests; seccomp/AppArmor/SELinux confinement is a workload-level control, so there is nothing to assess here.0—
D42 · Runtime Threat Enforcementruntime-hardening—runtime-hardening: not applicable — No Kubernetes/orchestration workloads found in the repository manifests; runtime threat-detection and admission-control policy are cluster-level controls, so there is nothing to assess here.0—
D43 · Malicious Dependenciesosv-scanner—osv-scanner --format json --recursive --experimental-disable-plugins transitivedependency/requirements --experimental-disable-plugins dotnet/csproj --experimental-disable-plugins dotnet/nugetcpm .0artifacts/raw/osv-scanner.json

Run 01a16777-3cd9-7124-99a4-af3299988d00 · every finding is also locatable in findings.md, and the complete scoring record (with exit codes + durations) in sidecar.json.

Downloadable artifacts

Machine-readable and reproducible from this commit + frozen rubric — drop them straight into a contract appendix, a CRA dossier, or a downstream SCA / VEX tool.

⬇ Findings, MITRE CWE-tagged .sarif⬇ Health changelog .md