doc-updater

doc-updater is a skill for Claude Code, Codex from myths-labs/muse. It costs 23 tokens per session (221 once invoked), scanned A, original, MIT.

A documentation-maintenance skill that checks a codebase and updates its maps and written guides to match the current implementation.

In plain words
What is it for?
Use it after significant code changes to update codemaps, README.md, PRD.md, CLAUDE.md, deployment guides, and related documentation.
Why use it?
It reduces the gap between what the code does and what the README or other documentation says.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md.

Good fit Use it after significant code changes to update codemaps, README.md, PRD.md, CLAUDE.md, deployment guides, and related documentation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/myths-labs/muse/doc-updater
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.

Any agent
npx skills add myths-labs/muse --skill doc-updater
Clone the repo
git clone --depth 1 https://github.com/myths-labs/muse

Made for: Claude Code, Codex.

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 doc-updater

README.md
[![agentmods](https://agentmods.dev/badge/skills/myths-labs/muse/doc-updater/github.svg)](https://agentmods.dev/skills/myths-labs/muse/doc-updater)
Your own site
<a href="https://agentmods.dev/skills/myths-labs/muse/doc-updater"><img src="https://agentmods.dev/badge/skills/myths-labs/muse/doc-updater/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 doc-updater

Your own site · 80×15
<a href="https://agentmods.dev/skills/myths-labs/muse/doc-updater"><img src="https://agentmods.dev/badge/skills/myths-labs/muse/doc-updater.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 221 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.
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 $0.00023 $0.00221
Opus 5 $0.00012 $0.00111
Sonnet 5 $0.00005 $0.00044
Haiku 4.5 $0.00002 $0.00022

Measured 10d ago against content hash fa678b4a497a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

doc-updater 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 10d 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.

skills/toolkit/doc-updater/SKILL.md · 27 lines

What it actually says

Doc Updater Skill

This skill adopts the persona of a documentation specialist to ensure docs match code reality.

Usage

Invoke helps to regenerate codemaps or update PRD.md, CLAUDE.md, or README.md after significant code changes.

Workflow

  1. Analyze: Scan file structure (list_dir) and read key entries (view_file).
  2. Codemap: Generate mental or physical map of modules.
  3. Update: Reword documentation to reflect actual implementation.

Key Targets (Examples)

  • README.md: Ensure features match implementation.
  • docs/deployment.md: Keep deployment steps current.
  • package.json: Dependency versions.

Documentation Best Practices

  • Single Source of Truth: Code is truth. Docs follow code.
  • Freshness: Include "Last Updated" dates.
  • Actionable: Commands must run.
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. 10d ago First seen · 27 lines · 23 tokens per session scan A fa678b4a497a

Subscribe to this mod's changes

doc-updater is a skill published in the GitHub repository myths-labs/muse (32 stars, last pushed 3d ago), licensed MIT. It adds 23 tokens to every session and 221 once invoked, about $0.0001 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 2026-08-30.

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