Overview

Audits cross-cutting code health across security, delivery, maintainability, dependencies, diagnosability, concurrency, and lifecycle. Use when no specialist audit is primary.

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Codebase Auditor

Goal: Perform a broad, read-only production-code health audit. Find concrete cross-cutting failure, security, delivery, and maintenance risks without turning detector matches or personal style preferences into findings. Do not substitute for documentation trust, test-portfolio, whole-architecture, or persistence-specific review.

Execution contract: Treat the ordered checkbox workflow below as this skill's Definition of Done. Track every checkbox as PENDING, then resolve it to PROVEN with concrete evidence, CLEARED with evidence that its conditional trigger is absent, or UNPROVEN; reading, mentioning, delegating, skipping, or tool failure is not proof. Before returning, resolve every PENDING, count only PROVEN and CLEARED items as complete, apply this skill's verdict, decision, and approval rules to every UNPROVEN, and prepend Checklist: X/Y complete
Incomplete: None | section/item — reason; outcome impact; exact next action; list every UNPROVEN item.

Tool Routing

Need	Preferred tool	Use it when	Fallback
Repository map and stack detection	Native file listing, manifests, build files, and repository instructions	Establishing scope, generated areas, entrypoints, supported runtimes, and commands	Targeted tree inspection and known entrypoints
Symbols, callers, ownership, and data flow	Language server or host-native code intelligence	A finding depends on symbol identity, references, overrides, route wiring, or cross-file behavior	Narrow text search plus direct inspection of every relevant match
Current changes and historical context	Git status, diff, log, and blame	Separating current work, regressions, intentional constraints, and dead compatibility paths	Current implementation and explicit decision records
Delivery health	Repository-defined build, lint, type, test, and smoke commands	Establishing whether the project can ship in its documented environment	Inspect CI and scripts; mark execution unavailable
Dependency and security state	Native package-manager audit, manifests, lockfiles, and official advisories	Checking known vulnerabilities, unsupported versions, and dependency health	Official registry and vendor sources; never guess severity
Runtime evidence	Existing logs, metrics, traces, profiles, and diagnostics	Static analysis cannot establish frequency, reachability, or operational impact	Call-path analysis with an explicit static-only limitation
Current external behavior	Official specifications, vendor documentation, and release notes	A finding depends on current API, runtime, or standard behavior	Primary-source web research; otherwise mark `UNVERIFIED`

Start with summary-level discovery and narrow before reading deeply. Run only repository-defined or clearly safe diagnostic commands; never publish, deploy, migrate production data, rotate secrets, or rewrite files during the audit.

Evidence Rules

A pattern match is a candidate, not a finding. Confirm reachability, context, and consequence.
Runtime failure or deterministic command output outweighs static suspicion; static evidence remains valid when execution is unavailable and the limitation is explicit.
Generated, vendored, fixture, migration-history, and intentionally compatible code require context-specific treatment.
External best practice is actionable only when it addresses a concrete repository defect or risk.
Score or count only findings with distinct root causes; deduplicate symptoms that share one correction.

Checklist

1. Establish Scope and Baseline

Detect languages, frameworks, package managers, entrypoints, deployment model, generated areas, and the repository's supported verification commands.
Classify each runtime surface as long-running service, CLI, library, job, serverless function, or platform-managed component before requiring probes, telemetry, signal handling, or shutdown behavior.
Read applicable instructions and identify security boundaries, critical business paths, public interfaces, and irreversible operations.
Inspect Git state so the audit does not overwrite, misattribute, or ignore unrelated user changes.
Establish build, lint, type, test, and smoke baseline where feasible; record commands, environment, exit status, and relevant output.
Define exclusions and depth based on risk rather than scanning every file with equal effort.
Keep the audit read-only. Allow only permitted caches and build artifacts and disclose them when created.

2. Audit Security and Delivery Boundaries

3. Audit Maintainability and Dependencies

4. Audit Diagnosability, Concurrency, and Lifecycle

Check whether logs are structured, correctly leveled, actionable, correlated across a request or job, and free of secrets and excessive payload data.
Verify that correlation context crosses outbound calls, queues, retries, scheduled work, and detached async boundaries instead of existing only in the first request log.
Check metrics, traces, health signals, and error context for critical paths; require observability only where operators need it to detect or diagnose failure.
Trace shared mutable state, lock ordering, atomicity, async task ownership, cancellation, retries, and race windows on reachable concurrent paths.
Inspect read-modify-write across await or yield points and build a resource/accessor timeline for shared files, subprocesses, terminal or OS resources, and repeated user triggers; include accessors outside the current process.
Check blocking I/O or synchronous waits in async paths, unbounded concurrency, orphan tasks, deadlocks, TOCTOU hazards, and thread-unsafe resources.
Inspect startup ordering, dependency readiness, configuration validation, fail-fast behavior, signal handling, graceful shutdown, and in-flight work draining.
Inventory resources acquired during startup and runtime, then match each to idempotent cleanup in safe reverse dependency order on success, failure, timeout, cancellation, and repeated shutdown signals.
Keep probe semantics distinct: liveness proves the process can recover without checking fragile dependencies, while readiness withholds traffic until required dependencies and initialization are usable; neither probe should create material load or side effects.

5. Validate Findings and Report

Research external APIs, standards, vulnerabilities, and runtime behavior only when they can change a finding, using official sources matching the relevant version.
Filter framework conventions, generated code, bounded administrative paths, tests, examples, and documented tradeoffs before confirming a candidate.
Reproduce high-severity issues with a safe command, test, minimal call trace, or complete static failure path whenever possible.
Apply a materiality and acceptable-alternative gate to every candidate. Require a concrete failure, security, delivery, operability, or recurring maintenance impact at the repository's evidenced scale. Reject nitpicks, personal taste, theoretical purity, generic best practice, hypothetical scale, and a merely different implementation when the current tradeoff is reasonable; when several designs work, require the outcome or constraint rather than one preferred style.
Put a directly relevant Markdown practice link in every finding's required resolution: prefer current official documentation or a specification, and use reputable primary engineering material only when official sources do not resolve the tradeoff. Open and verify the source; it must support the proposed mechanism,

View source ↗

File metadata

name: ln-22-codebase-auditor
description: "Audits cross-cutting code health across security, delivery, maintainability, dependencies, diagnosability, concurrency, and lifecycle. Use when no specialist audit is primary."

View original text

---
name: ln-22-codebase-auditor
description: "Audits cross-cutting code health across security, delivery, maintainability, dependencies, diagnosability, concurrency, and lifecycle. Use when no specialist audit is primary."
---

# Codebase Auditor

**Goal:** Perform a broad, read-only production-code health audit. Find concrete cross-cutting failure, security, delivery, and maintenance risks without turning detector matches or personal style preferences into findings. Do not substitute for documentation trust, test-portfolio, whole-architecture, or persistence-specific review.

**Execution contract:** Treat the ordered checkbox workflow below as this skill's Definition of Done. Track every checkbox as `PENDING`, then resolve it to `PROVEN` with concrete evidence, `CLEARED` with evidence that its conditional trigger is absent, or `UNPROVEN`; reading, mentioning, delegating, skipping, or tool failure is not proof.
Before returning, resolve every `PENDING`, count only `PROVEN` and `CLEARED` items as complete, apply this skill's verdict, decision, and approval rules to every `UNPROVEN`, and prepend **Checklist: X/Y complete**<br>**Incomplete: None | section/item — reason; outcome impact; exact next action**; list every `UNPROVEN` item.

## Tool Routing

| Need | Preferred tool | Use it when | Fallback |
|---|---|---|---|
| Repository map and stack detection | Native file listing, manifests, build files, and repository instructions | Establishing scope, generated areas, entrypoints, supported runtimes, and commands | Targeted tree inspection and known entrypoints |
| Symbols, callers, ownership, and data flow | Language server or host-native code intelligence | A finding depends on symbol identity, references, overrides, route wiring, or cross-file behavior | Narrow text search plus direct inspection of every relevant match |
| Current changes and historical context | Git status, diff, log, and blame | Separating current work, regressions, intentional constraints, and dead compatibility paths | Current implementation and explicit decision records |
| Delivery health | Repository-defined build, lint, type, test, and smoke commands | Establishing whether the project can ship in its documented environment | Inspect CI and scripts; mark execution unavailable |
| Dependency and security state | Native package-manager audit, manifests, lockfiles, and official advisories | Checking known vulnerabilities, unsupported versions, and dependency health | Official registry and vendor sources; never guess severity |
| Runtime evidence | Existing logs, metrics, traces, profiles, and diagnostics | Static analysis cannot establish frequency, reachability, or operational impact | Call-path analysis with an explicit static-only limitation |
| Current external behavior | Official specifications, vendor documentation, and release notes | A finding depends on current API, runtime, or standard behavior | Primary-source web research; otherwise mark `UNVERIFIED` |

Start with summary-level discovery and narrow before reading deeply. Run only repository-defined or clearly safe diagnostic commands; never publish, deploy, migrate production data, rotate secrets, or rewrite files during the audit.

## Evidence Rules

- A pattern match is a candidate, not a finding. Confirm reachability, context, and consequence.
- Runtime failure or deterministic command output outweighs static suspicion; static evidence remains valid when execution is unavailable and the limitation is explicit.
- Generated, vendored, fixture, migration-history, and intentionally compatible code require context-specific treatment.
- External best practice is actionable only when it addresses a concrete repository defect or risk.
- Score or count only findings with distinct root causes; deduplicate symptoms that share one correction.

## Checklist

### 1. Establish Scope and Baseline

- [ ] Detect languages, frameworks, package managers, entrypoints, deployment model, generated areas, and the repository's supported verification commands.
- [ ] Classify each runtime surface as long-running service, CLI, library, job, serverless function, or platform-managed component before requiring probes, telemetry, signal handling, or shutdown behavior.
- [ ] Read applicable instructions and identify security boundaries, critical business paths, public interfaces, and irreversible operations.
- [ ] Inspect Git state so the audit does not overwrite, misattribute, or ignore unrelated user changes.
- [ ] Establish build, lint, type, test, and smoke baseline where feasible; record commands, environment, exit status, and relevant output.
- [ ] Define exclusions and depth based on risk rather than scanning every file with equal effort.
- [ ] Keep the audit read-only. Allow only permitted caches and build artifacts and disclose them when created.

### 2. Audit Security and Delivery Boundaries

- [ ] Search for committed secrets, unsafe credential patterns, sensitive defaults, debug bypasses, and accidental exposure through logs or errors.
- [ ] For credential findings, never expose the raw value: distinguish live material from placeholders, fixtures, examples, and allowlisted fingerprints; report only the type, location, and redacted evidence, and recommend revocation, rotation, or history remediation only for confirmed exposure without performing it during the audit.
- [ ] Trace untrusted input into SQL, shell, templates, HTML, file paths, URLs, deserialization, redirects, and other injection-sensitive sinks.
- [ ] Check authentication, authorization, tenant or ownership isolation, privilege transitions, insecure direct object access, and default-deny behavior.
- [ ] Check validation at trust boundaries, canonicalization, size and rate limits, unsafe file operations, and destructive-action confirmation or guards.
- [ ] Verify security findings against actual call paths, framework behavior, configuration, and current official guidance before assigning severity.
- [ ] Inspect compiler, linter, type checker, tests, packaging, and CI configuration for skipped gates, ignored failures, environment drift, and non-reproducible delivery.
- [ ] Verify that successful packaging produces the intended entrypoints, assets, metadata, target platform, and deployable artifact; exit code zero alone does not prove a shippable build.
- [ ] Find stale skip, quarantine, allow-failure, continue-on-error, and warning-suppression paths that make required signals appear green.
- [ ] Check configuration completeness, required environment validation, unsafe fallbacks, missing examples, and differences between local, CI, and deployment settings.

### 3. Audit Maintainability and Dependencies

- [ ] Find evidence-backed duplication across functions, handlers, modules, configuration, and integration code; distinguish shared domain concepts from coincidental similarity.
- [ ] Identify over-abstraction, unused extension points, excessive factories or wrappers, parallel mechanisms, and custom utilities that duplicate declared platform capabilities.
- [ ] Before merging duplication or removing an abstraction, check lifecycle and ownership boundaries, intentional decoupling, dependency injection or test seams, framework requirements, public extension contracts, and expected independent evolution.
- [ ] Inspect complexity hotspots, long methods, god modules, deep nesting, excessive parameters, boolean-mode APIs, misleading names, and mixed responsibilities.
- [ ] Check algorithms for early-exit mistakes, duplicate-key loss, boundary errors, unbounded work, repeated scans, mutation during iteration, and hidden shared state.
- [ ] Check hardcoded operational values, URLs, timeouts, limits, identifiers, and environment-specific behavior that should be explicit configuration or named policy.
- [ ] Trace one concept across external contracts, DTOs, services, persistence, and storage; flag synonym or casing drift only when no explicit serializer, code-generation, or ORM boundary mapping explains it.
- [ ] Audit dependency vulnerabilities, support status, license or runtime constraints, duplicate packages, unused packages, and credible replacement or removal opportunities.
- [ ] Verify vulnerability findings against the installed version and whether the vulnerable API or feature is reachable; distinguish affected code from a package merely present in the lockfile.
- [ ] Recommend native, existing-dependency, or external replacements only after checking required feature parity, migration surface, maintenance, license, security history, and domain-specific behavior.
- [ ] Find unreachable code, unused imports and exports, commented-out implementations, obsolete flags, dead compatibility shims, and replacement code left beside its successor.
- [ ] Confirm dead-code findings against reflection, registration, framework discovery, configuration, serialization, templates, and external entrypoints before reporting deletion as safe.

### 4. Audit Diagnosability, Concurrency, and Lifecycle

- [ ] Check whether logs are structured, correctly leveled, actionable, correlated across a request or job, and free of secrets and excessive payload data.
- [ ] Verify that correlation context crosses outbound calls, queues, retries, scheduled work, and detached async boundaries instead of existing only in the first request log.
- [ ] Check metrics, traces, health signals, and error context for critical paths; require observability only where operators need it to detect or diagnose failure.
- [ ] Trace shared mutable state, lock ordering, atomicity, async task ownership, cancellation, retries, and race windows on reachable concurrent paths.
- [ ] Inspect read-modify-write across await or yield points and build a resource/accessor timeline for shared files, subprocesses, terminal or OS resources, and repeated user triggers; include accessors outside the current process.
- [ ] Check blocking I/O or synchronous waits in async paths, unbounded concurrency, orphan tasks, deadlocks, TOCTOU hazards, and thread-unsafe resources.
- [ ] Inspect startup ordering, dependency readiness, configuration validation, fail-fast behavior, signal handling, graceful shutdown, and in-flight work draining.
- [ ] Inventory resources acquired during startup and runtime, then match each to idempotent cleanup in safe reverse dependency order on success, failure, timeout, cancellation, and repeated shutdown signals.
- [ ] Keep probe semantics distinct: liveness proves the process can recover without checking fragile dependencies, while readiness withholds traffic until required dependencies and initialization are usable; neither probe should create material load or side effects.

### 5. Validate Findings and Report

- [ ] Research external APIs, standards, vulnerabilities, and runtime behavior only when they can change a finding, using official sources matching the relevant version.
- [ ] Filter framework conventions, generated code, bounded administrative paths, tests, examples, and documented tradeoffs before confirming a candidate.
- [ ] Reproduce high-severity issues with a safe command, test, minimal call trace, or complete static failure path whenever possible.
- [ ] Apply a materiality and acceptable-alternative gate to every candidate. Require a concrete failure, security, delivery, operability, or recurring maintenance impact at the repository's evidenced scale. Reject nitpicks, personal taste, theoretical purity, generic best practice, hypothetical scale, and a merely different implementation when the current tradeoff is reasonable; when several designs work, require the outcome or constraint rather than one preferred style.
- [ ] Put a directly relevant Markdown practice link in every finding's required resolution: prefer current official documentation or a specification, and use reputable primary engineering material only when official sources do not resolve the tradeoff. Open and verify the source; it must support the proposed mechanism,

Review the source

Skill source recorded

Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.

Review before install: Avoid automatic install

Dependency or permission surface needs review
Permission surface may require sandboxing
Financial research output is not financial advice; require human review before any live investment decision
The skill is quite verbose and may be heavy for simple audits, but this is a quality trade-off rather than a defect.

Open full audit

Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.

Start with one small task

1Read the source. Confirm the input, expected output, dependencies and permissions.
2Ask your agent for a plan. Approve setup and any costs before running a small isolated test.
3Check the output and changed files. Report only what actually ran; keep the source revision for reproduction.

Check the source for dependencies, API keys and third-party costs. A public repository does not mean every service is free.

Source & trust

Indexed

Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.

License: MIT
Version: 1.0.0
Last GitHub push: Aug 29, 2026
Registry updated: Sep 1, 2026
Instruction path: plugins/codebase-audit-suite/skills/ln-22-codebase-auditor/SKILL.md

Version reported in registry metadata; check source releases before relying on it.

Quality

75/100

Strong

Trust

59/100

Do not auto-install

Audit

77/100

Needs review

Agent access

This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.

Open install API LLM text format Open manifest Auto-resolve Plan

More details

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  "trust": {
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    "version": "trust-score-v4",
    "install_policy": "block",
    "evidence": {
      "stars": "554 GitHub stars",
      "repoActivity": "554 stars, 83 forks",
      "lastPushed": "10d since push",
      "license": "MIT",
      "repository": "https://github.com/levnikolaevich/claude-code-skills/tree/master/plugins/codebase-audit-suite/skills/ln-22-codebase-auditor",
      "install": "npx skills add levnikolaevich/claude-code-skills --skill ln-22-codebase-auditor",
      "installSafety": "standard package or runtime install path",
      "permissionSurface": "secrets or environment access, shell or command execution",
      "documentation": "Strong README/SKILL.md context",
      "agentOutcomes": "No agent outcome data yet"
    },
    "outcome_evidence": {
      "total": 0,
      "successes": 0,
      "failures": 0,
      "not_relevant": 0,
      "success_rate": null,
      "recent_success_rate": null,
      "recent_failure_rate": null,
      "install_attempts": 0,
      "install_success_rate": null,
      "risk_blocked": 0,
      "setup_required": 0,
      "avg_output_quality": null,
      "production_outcomes": 0,
      "last_outcome_at": null,
      "label": "No agent outcome data yet"
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      "Financial research output is not financial advice; require human review before any live investment decision.",
      "Quality score needs review",
      "Permission surface needs review: secrets or environment access, shell or command execution",
      "Dependency/runtime risk: command execution surface, credential or environment access",
      "Permission surface: secrets or environment access, shell or command execution"
    ]
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  "agent_proven": {
    "version": "agent-proven-v1",
    "score": 0,
    "tier": "unproven",
    "label": "Needs first agent run",
    "summary": "No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.",
    "metrics": {
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      "successfulOutcomes": 0,
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      "installAttempts": 0,
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      "successRate": null,
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      "recentFailureRate": null,
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      "avgTimeToUsefulMs": null,
      "productionOutcomes": 0,
      "humanReviewRequired": 0,
      "uniqueAgents": 0,
      "lastOutcomeAt": null
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    "signals": [],
    "penalties": [
      "No real agent outcome evidence yet"
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  "audit": {
    "score": 77,
    "risk_level": "needs_review",
    "risk_label": "Needs review",
    "warnings": [
      "Dependency or permission surface needs review",
      "Permission surface may require sandboxing",
      "Financial research output is not financial advice; require human review before any live investment decision",
      "The skill is quite verbose and may be heavy for simple audits, but this is a quality trade-off rather than a defect.",
      "The excerpt is truncated; the full checklist and rules are not visible, but the provided content is coherent and complete enough for evaluation.",
      "Financial research output is not financial advice; require human review before any live investment decision.",
      "Quality score needs review",
      "Permission surface needs review: secrets or environment access, shell or command execution"
    ]
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  "safety_gate": {
    "tier": "blocked",
    "label": "Blocked for auto-install",
    "auto_install_policy": "block",
    "auto_install_allowed": false,
    "human_review_required": true,
    "blocked": true,
    "recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
  },
  "quality": {
    "score": 75,
    "label": "Strong"
  },
  "supply": {
    "track": "Coding and developer agents",
    "scenario": "GitHub automation",
    "maintenance": "10d since push",
    "risk": "Needs review"
  },
  "alternative_skills": [],
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    "teams that need a vendor-supported SLA",
    "production agents without a repository review",
    "The skill is quite verbose and may be heavy for simple audits, but this is a quality trade-off rather than a defect.",
    "High-risk permission hints: Shell or command execution, Secrets or environment access",
    "Dependency or permission surface needs review",
    "Permission surface may require sandboxing",
    "Financial research output is not financial advice; require human review before any live investment decision",
    "The excerpt is truncated; the full checklist and rules are not visible, but the provided content is coherent and complete enough for evaluation."
  ],
  "agent_contract": {
    "task_input": "Use ln-22-codebase-auditor in an agent workflow",
    "recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first.",
    "install_policy": "block",
    "minimum_review_before_use": [
      "Trust: 67/100 Manual review",
      "Audit: 77/100 Needs review",
      "Safety: 33/100 Avoid automatic install",
      "Review repository, license, install command, and permission surface before production use."
    ],
    "expected_agent_output": {
      "selected_skill": "levnikolaevich-ln-22-codebase-auditor (ln-22-codebase-auditor)",
      "install_command": "npx skills add levnikolaevich/claude-code-skills --skill ln-22-codebase-auditor",
      "risk_summary": "Needs review; Blocked for auto-install; Review before production",
      "verification_result": "Report the smallest successful task, files touched, warnings, and any missing setup."
    }
  },
  "outcome_feedback": {
    "endpoint": "https://www.openagentskill.com/api/agent/outcome",
    "method": "POST",
    "requires_resolve_event_id": true,
    "event_id_source": "Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.",
    "expected_outcomes": [
      "success",
      "failed",
      "not_relevant",
      "blocked_by_risk",
      "setup_required"
    ],
    "payload_template": {
      "event_id": "<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>",
      "skill_slug": "levnikolaevich-ln-22-codebase-auditor",
      "task": "Use ln-22-codebase-auditor in an agent workflow",
      "agent": "codex",
      "outcome": "success",
      "install_used": true,
      "risk_blocked": false,
      "setup_required": false,
      "task_success": true,
      "output_quality": 4,
      "error_type": null,
      "human_review_required": false,
      "workspace": "sandbox",
      "time_to_useful_ms": 120000,
      "notes": "Report the smallest successful task, setup friction, files touched, and risk notes."
    }
  },
  "endpoints": {
    "web": "https://www.openagentskill.com/skills/levnikolaevich-ln-22-codebase-auditor",
    "api": "https://www.openagentskill.com/api/agent/skills/levnikolaevich-ln-22-codebase-auditor",
    "audit": "https://www.openagentskill.com/skills/levnikolaevich-ln-22-codebase-auditor/audit",
    "eval": "https://www.openagentskill.com/api/agent/evals?slug=levnikolaevich-ln-22-codebase-auditor&task=Use%20ln-22-codebase-auditor%20in%20an%20agent%20workflow&max_risk=medium",
    "resolve": "https://www.openagentskill.com/api/agent/resolve?task=Use%20ln-22-codebase-auditor%20in%20an%20agent%20workflow&agent=codex&max_risk=medium",
    "receipt": "https://www.openagentskill.com/api/agent/receipt?task=Use%20ln-22-codebase-auditor%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text",
    "install": "https://www.openagentskill.com/api/skills/levnikolaevich-ln-22-codebase-auditor/install",
    "manifest": "https://www.openagentskill.com/api/registry/manifest/levnikolaevich-ln-22-codebase-auditor"
  }
}

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Creator: levnikolaevich
Source: levnikolaevich/claude-code-skills
Indexed by: OpenAgentSkill community index

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