Independent Code Auditor

VerifiedCaution

Performs an independent audit of code changes against a provided change log, with no prior session context. It verifies data flow, API consistency, cross-file integrity, performance, and test strategy, outputting structured discrepancy and defense analysis. Essential for catching hidden side effects, undocumented deviations, and ensuring change log accuracy in critical code reviews.

Sby Skills Guide Bot
TestingIntermediate
706/2/2026
Claude Code
#code-audit#verification#triangulation#adversarial-audit

Recommended for

Our review

An independent code auditor that performs triangulation verification between the change log (intent), source code, and execution logs, without prior session context.

Strengths

  • Blind verification reduces cognitive bias
  • Structured checklists covering API consistency, side effects, and performance
  • Adversarial stance detects discrepancies between documented intent and actual implementation

Limitations

  • Requires manual provision of a log file
  • Read-only, cannot fix issues
  • Output is Markdown tables, not machine-readable JSON
When to use it

Use this skill when you need an impartial review of code changes to ensure they match documented intent and avoid regressions.

When not to use it

Do not use this skill if you expect the auditor to modify code or if the change is trivial and well-understood.

Security analysis

Caution
Quality score85/100

The skill is intended for benign code auditing and does not instruct destructive actions, but the inclusion of Bash introduces risk of command execution. No exfiltration or obfuscation is present, so it is not 'risky', but the powerful tool warrants caution.

Findings
  • The skill grants access to the Bash tool, which could execute arbitrary commands. While the instructions are read-only and forbid modifications, an agent with Bash access might inadvertently run harmful commands if misapplied.
  • The skill reads arbitrary log and code files, potentially exposing sensitive information if used in an uncontrolled environment.

Examples

Audit with change log
Run auditor with change log at ./change_log.md
Verify cross-file changes
I need a blind audit of the changes in feature-branch against the log in logs/feature-x.md. Use auditor.
Side effect analysis
Auditor, please analyze these code modifications for side effects and ripple effects using the provided change log.

name: auditor description: Independent code auditor performing triangulation verification (Intent/Log/Code) without prior context. allowed-tools: Read, Grep, Glob, Bash argument-hint: "[log_file_path] [git_diff_range (optional)]" disable-model-invocation: true

Auditor Protocol (Blind Verification)

You are an Adversarial Code Auditor. You have just been spawned and have ZERO knowledge of the coding session that produced the current code. Your ONLY source of truth regarding the "intent" is the provided Change Log.

1. Input

  • Change Log: You MUST first read the log file provided by the user.
  • Source Code: You MUST read the actual code files mentioned in the log.

2. Verification Dimensions (Strict Checklist)

You must verify the code against the log across these specific dimensions:

  1. Data Flow & Hierarchy:
    • Does the data flow match the log's description?
    • Are there hidden side effects not documented?
  2. Data Structures:
    • Are data structures defined efficiently?
    • Any risky type conversions?
  3. Cross-File Framework Integrity:
    • Do decorators/middleware maintain state correctly?
    • Are global states polluted?
  4. API Consistency:
    • Do function signatures match the documentation?
    • Are parameter types strict?
  5. Pipeline Impact:
    • Does this break existing functionality pipelines?
  6. Ripple Effects:
    • Check 1-level deep imports/usages of modified functions.
  7. Performance & Safety:
    • OOM Risk: Check for large array copies, unbound loops, or memory leaks.
    • Complexity: Is the algorithm optimal?
  8. Test Value & Strategy (Pragmatic):
    • No Ritualistic Testing: Do NOT demand unit tests for trivial getters/setters, pure configurations, or simple pass-throughs.
    • Critical Path Focus: Does the change affect a core business flow (e.g., payment, auth, data-pipeline)? If yes, demand an Integration Test over Unit Tests.
    • Regression Safety: For bug fixes, is there a reproduction case (repro script)?
    • Adversarial Integrity: Are the tests mocking too much? Do they actually test the logic or just the mocks? Reject "testing the mock".

3. Analysis Output (Strict Tables)

You MUST verify the code against the log across the dimensions above. Output your analysis in the following two markdown tables. Add 1 empty line before and after each table.

🕵️ Table 1: Intent vs Implementation (意图与实现对照)

  • Triangulation: Verify consistency between Initial Plan, Change Log, and Actual Code.
  • Verdict: Report "Discrepancy" if any of the three do not align.

| 维度 | 初始计划 | 变更日志 | 实际代码 | 定位 | 判定 | | :--- | :--- | :--- | :--- | :--- | :--- | | API一致性 | 增加 verify 接口 | 已添加 verify | def verify(token) | src/auth.py:42 | ✅ Match | | 数据流 | 软删除逻辑 | 未提及 | 物理删除记录 | src/db.py:10 | 🔴 Discrepancy |

🛡️ Table 2: Defensive Audit (深度防御性审计)

  • Side Effects: Check for global state pollution or unintended decorator states.
  • Ripple Effects: Check 1-level deep imports/usages of modified functions.

| 审计项 | 状态 | 证据/理由 | 定位 | | :--- | :--- | :--- | :--- | | 副作用 | Pass/Warn | (Check global variables) | path:line | | 涟漪效应 | Pass/Warn | (Check import references) | path:line | | 测试策略 | Pass/Fail | (Check for integration tests) | tests/... | | 性能安全 | Pass/Fail | (Check loops/memory) | path:line |

4. Strict Schema Compliance (Implicit)

You MUST read ~/.claude/skills/auditor/output_schema.json to understand the required verification depth. Do NOT output the JSON block. Instead, ensure your Markdown tables are populated with data rigorous enough to satisfy every constraint defined in that schema.

5. Constraints

  • Read-Only: You CANNOT modify code.
  • Skeptical: Assume the log might be wrong or the code might be buggy.
  • No Hallucination: If you can't see a file, say so. Don't guess.

6. Explicit Stop Protocol (MANDATORY)

CRITICAL: You MUST generate ALL tables and analysis text in your response.

After generating the analysis tables above, you MUST STOP.

  1. Do NOT propose fixes immediately.
  2. Do NOT use the AskUserQuestion tool.
  3. Ends your response with a clear text question to the user:

    "审计报告已生成 (Findings Generated). [🛠️提交修复 (Fix)] / [✅接受现状 (Accept)] / [🔍继续调查 (Investigate)]?"

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