docs-drift-review

docs-drift-review is a skill for Claude Code, Codex from yarlson/yarstack. It costs 34 tokens per session (288 once invoked), scanned A, original, MIT.

A skill for checking whether documentation still matches a code or configuration change. Documentation includes material such as READMEs, instructions, API descriptions, examples, and command help.

In plain words
What is it for?
Use it to review affected documentation, report specific mismatches, and—when authorized—update the relevant source documents or regenerate generated help.
Why use it?
It finds statements that became incorrect after an implementation changed.

Skill for Claude CodeCodex

Part of the yarstack plugin — 38 skills shipped together

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 skills/yarlson/yarstack/docs-drift-review
Any agent
npx skills add yarlson/yarstack --skill docs-drift-review
Clone the repo
git clone --depth 1 https://github.com/yarlson/yarstack

Made for: Claude Code, Codex.

Or install yarstack, the plugin that ships this one along with the rest of its 38 skills.

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-drift-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/yarlson/yarstack/docs-drift-review.svg)](https://agentmods.dev/skills/yarlson/yarstack/docs-drift-review)
Your own site
<a href="https://agentmods.dev/skills/yarlson/yarstack/docs-drift-review"><img src="https://agentmods.dev/badge/skills/yarlson/yarstack/docs-drift-review.svg" alt="Measured on agentmods" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 288 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 $0.00034 $0.00288
Opus 5 $0.00017 $0.00144
Sonnet 5 $0.00007 $0.00058
Haiku 4.5 $0.00003 $0.00029

Measured 4d ago against content hash 3c6aa6636bf8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

docs-drift-review 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 4d 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.

plugins/yarstack/skills/docs-drift-review/SKILL.md · 25 lines

What it actually says

Documentation Drift Review

Own change-scoped documentation accuracy through separate inspection and repair stages.

Workflow

  1. Confirm the changed behavior and whether the task authorizes documentation edits or only a read-only drift report.
  2. Identify canonical, generated, mirrored, and external documentation describing the changed surface.
  3. Compare implementation with README files, instructions, APIs, schemas, operational docs, examples, templates, and command help in scope.
  4. Report concrete drift with the affected claim, implementation evidence, canonical owner, and required correction.
  5. When edits are authorized, update only directly affected canonical documents in their existing style.
  6. Change generated documentation or help at its source and regenerate it through the repository's established command.
  7. For authorized prose edits, use text-improve on the final changed text without expanding the drift scope.

Use docs-review for broader documentation quality, repo-context-document for deliberate docs/context/ work, plan-update for plan mechanics, and spec-update for semantic contract decisions.

Do not restructure documentation, hand-edit generated content, change product behavior, or modify external documentation without authority.

Finish with changed documents, an evidenced no-change result, or unresolved owner decisions.

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. 4d ago First seen · 25 lines · 34 tokens per session scan A 3c6aa6636bf8

Subscribe to this mod's changes

docs-drift-review is a skill published in the GitHub repository yarlson/yarstack (3 stars, last pushed 7d ago), licensed MIT. It adds 34 tokens to every session and 288 once invoked, about $0.0002 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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