docs-sync-checker

docs-sync-checker is a skill for Claude Code from notque/vexjoy-agent. It costs 12 tokens per session (2,532 once invoked), scanned A, original, MIT.

A documentation checker compares the files in a project with the tools and entries listed in its README. It reports missing or outdated documentation and can produce machine-readable results for CI/CD, which automatically checks changes.

In plain words
What is it for?
Use it to scan documentation, cross-reference filesystem entries, report missing or extra entries, calculate a documentation sync score, and suggest fixes.
Why use it?
It helps detect documentation drift so the README does not quietly become inconsistent with the project.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python3 scripts/docs-catalog.py --check.

Good fit Use it to scan documentation, cross-reference filesystem entries, report missing or extra entries, calculate a documentation sync score, and suggest fixes.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/notque/vexjoy-agent
agentmods
npx agentmods add skills/notque/vexjoy-agent/docs-sync-checker

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for docs-sync-checker

README.md
[![agentmods](https://agentmods.dev/badge/skills/notque/vexjoy-agent/docs-sync-checker/github.svg)](https://agentmods.dev/skills/notque/vexjoy-agent/docs-sync-checker)
Your own site
<a href="https://agentmods.dev/skills/notque/vexjoy-agent/docs-sync-checker"><img src="https://agentmods.dev/badge/skills/notque/vexjoy-agent/docs-sync-checker/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for docs-sync-checker

Your own site · 80×15
<a href="https://agentmods.dev/skills/notque/vexjoy-agent/docs-sync-checker"><img src="https://agentmods.dev/badge/skills/notque/vexjoy-agent/docs-sync-checker.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 12 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,532 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Agent Snooping · line 212
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
How audits are shown
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 5.1 $0.00012 $0.02532
Opus 5.5 $0.00005 $0.01013
Sonnet 5.5 $0.00002 $0.00506
Haiku 4.5 $0.00001 $0.00253

Measured 25d ago against content hash 23474c146fbd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

docs-sync-checker 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 25d ago.

The scan reads SKILL.md. This mod also ships 4 executable files (scripts/generate_report.py, scripts/parse_docs.py, scripts/scan_tools.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/meta/docs-sync-checker/SKILL.md · 272 lines

How it starts

The opening of the file, as written. The whole thing — 272 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Documentation Sync Checker Skill

Deterministic 4-phase drift detector that compares the filesystem against README entries. Each phase (Scan, Cross-Reference, Detect, Report) has a gate that must pass before proceeding. The skill produces a sync score (percentage of tools properly documented) and actionable fix suggestions for every detected issue.

This skill checks documentation presence and absence only -- it does not judge description quality, generate documentation content, resolve merge conflicts, validate cross-references, or track when drift occurred. Suggested fixes use YAML descriptions verbatim; content generation and quality assessment require different skills.

Optional flags: --auto-fix (experimental, requires explicit opt-in), --strict (exit code 1 on issues), --format json (machine-readable output for CI/CD).


Instructions

Phase 1: SCAN

Goal: Discover all skills, agents, and commands in the repository filesystem. All discovery (file existence checks, YAML parsing, markdown extraction) must be deterministic -- no AI judgment on content quality.

Step 1: Run the scan script

python3 skills/meta/docs-sync-checker/scripts/scan_tools.py --repo-root $HOME/vexjoy-agent

Step 2: Validate discovery results

For each tool type, verify:

Skills (skills/**/SKILL.md):

  • File has opening --- and closing --- YAML delimiters
  • YAML contains non-empty name and description fields
  • name field matches directory name (e.g., skills/code-quality/code-linting/ has name: code-linting)

Agents (agents/*.md):

  • File has valid YAML frontmatter with name field
  • Filename (without .md) matches YAML name value

Commands (commands/**/*.md):

  • File exists as markdown in commands/ directory
  • Namespaced commands in subdirectories (e.g., commands/code/cleanup.md) are detected

Step 3: Validate the docs routing catalog

Every docs/*.md file (outside archive/ and images/) carries frontmatter with summary and read_when — the on-demand load triggers for docs, matching what skills/INDEX.json gives skills.

Read the full file on GitHub · 272 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. 26d ago Changed · -214 lines · +12 tokens per session 9498162ffb16
  2. 27d ago Changed · -5 lines 23474c146fbd
  3. 1mo ago First seen · 277 lines · 12 tokens per session scan A 398b4c74dbbd

Subscribe to this mod's changes

docs-sync-checker is a skill published in the GitHub repository notque/vexjoy-agent (442 stars, last pushed today), licensed MIT. It adds 12 tokens to every session and 2,532 once invoked, about $0.0000 per session on Opus 5.5. 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 2026-09-03.

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