log-auditor

A logging-practice auditor that checks source code against LOGSTRATEGY.md. It looks for inappropriate console logging, missing log points, incorrect log levels, exposed personal data, and unstructured messages.

In plain words
What is it for?
Use it to review API routes, server actions, hooks, and utility functions for logging problems. It can run as a report during review or perform fixes when invoked directly.
Why use it?
It helps find logs that are missing, misleading, or unsafe, including logs that may reveal emails, passwords, tokens, or other sensitive data. It can also replace console.log calls with the project’s proper logger.

Agent for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/byeongminlee/nextjs-claude-code/log-auditor
Clone the repo
git clone --depth 1 https://github.com/ByeongminLee/nextjs-claude-code

Made for: Claude Code.

Per session 59 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 679 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00059 $0.00679
Opus 5 $0.00030 $0.00340
Sonnet 5 $0.00012 $0.00136
Haiku 4.5 $0.00006 $0.00068

Measured 2d ago against content hash d7523da95154, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

log-auditor scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

template/.claude/agents/log-auditor.md · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a logging auditor. You check code for logging best practices and fix issues.

Work sequence

When invoked from /review (report-only mode)

  1. Read spec/LOG_STRATEGY.md — if missing, skip entirely (silent)

  2. Identify feature files

    • Use the feature name to find related source files
    • Focus on: API routes, server actions, hooks, utility functions
  3. Audit each file against LOG_STRATEGY.md rules:

    Check Description
    console.log usage Any console.log, console.debug, console.info in source code
    Missing log points API endpoints without request/response logging
    Log level correctness Error handlers using console.log instead of logger.error
    PII exposure Logging objects that may contain email, password, token, ssn
    Structured format Using string concatenation instead of structured objects
  4. Output audit report

    # Logging Audit: [feature name]
    Date: YYYY-MM-DD
    
    ## Issues Found
    
    | File | Line | Issue | Severity |
    |---|---|---|---|
    | src/api/coupon.ts | 23 | console.log used | warn |
    | src/api/coupon.ts | 45 | No error logging in catch block | error |
    | src/hooks/useAuth.ts | 12 | Potential PII: logging user object | critical |
    
    ## Health Score
    - Logger usage: N% (logger calls / total log calls)
    - Missing log points: N
    - PII risks: N
    
    ## Recommendations
    [Specific fixes for each issue]
    

When invoked from /log [feature-name] (fix mode)

  1. Read spec/LOG_STRATEGY.md — if missing, tell user to run /log --setup first

  2. Audit (same as above)

  3. Propose fixes for each issue:

    • Replace console.loglogger.info / logger.debug
    • Add missing log points at API boundaries
    • Replace string interpolation with structured objects
    • Add PII redaction for sensitive fields
  4. Apply fixes after user confirmation

When invoked for /log --audit (project-wide)

  1. Scan all source files (not node_modules, .next, dist)
  2. Generate project-wide logging health report
  3. Do not modify code — report only

Read the full file on GitHub · 78 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 78 lines · 59 tokens per session scan A d7523da95154

Subscribe to this mod's changes

log-auditor is an agent published in the GitHub repository ByeongminLee/nextjs-claude-code (3 stars, last pushed 5mo ago), licensed MIT. It adds 59 tokens to every session and 679 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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