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Agent skill

Update Docs

by cashew-labs in cashew-labs/libretto

Update AGENTS.md files based on session learnings about a topic.

MITAuto-check passedAgent Workflows

Install Update Docs

skills CLI
$ npx skills add cashew-labs/libretto --skill update-docs -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install cashew-labs/libretto update-docs --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/cashew-labs/libretto.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/update-docs .claude/skills/update-docs && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
update-docs
GitHub stars
904
Token cost
~278 tokens
SKILL.md length
121 words
Files
2 (incl. references)
Skills in repo
21
Repo updated
First seen
Licence
MIT

At a glance

Update AGENTS.md files based on session learnings about a topic.

  • Works in 5 steps: Review the conversation for learnings… → Determine where each learning belongs… → Check if the target AGENTS.md already… → …
  • Documenting patterns
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Conventions discovered during development

What it does

Update Docs is an agent skill from cashew-labs/libretto. Update AGENTS.md files based on session learnings about a topic. Use when documenting patterns, commands, or conventions discovered during development.

Its SKILL.md is about 280 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/updating-agents-docs.md`).

It sits in Agent Workflows, covering Agent instruction files. The repository describes itself as: The AI toolkit for building reliable browser automations. The licence is MIT.

When your agent uses it

  • Documenting patterns
  • Conventions discovered during development

Example prompts

  • “/update-docs”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Review the conversation for learnings about the specified topic
  2. Determine where each learning belongs (lowest common ancestor)
  3. Check if the target AGENTS.md already has related content
  4. Apply changes following the writing style in the guidelines
  5. List what was updated and why

What it can do on your machine

Read from SKILL.md and the folder at commit 41ab782. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Update Docs loads about 278 tokens when it runs, and up to ~1.3k if it reads all its reference files. Until then it costs about 41 tokens; SKILL.md has 121 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~41
When it runs · the whole SKILL.md, loaded when a task matches
~278
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from cashew-labs/libretto at commit 41ab782, republished under its MIT licence (© cashew-labs). 121 words, ~278 tokens.

Download SKILL.mdSave it as .claude/skills/update-docs/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
update-docs
description
Update AGENTS.md files based on session learnings about a topic. Use when documenting patterns, commands, or conventions discovered during development.

Update AGENTS.md files based on what was learned in this session about: $TOPIC

Read ./references/updating-agents-docs.md for full guidelines before proceeding.

Process

  1. Review the conversation for learnings about the specified topic:

    • Patterns or conventions discovered
    • Commands needed but not documented
    • Architectural insights
    • Common pitfalls encountered

  2. Determine where each learning belongs (lowest common ancestor):

    • Root AGENTS.md for repo-wide patterns
    • Package-level AGENTS.md for package-specific patterns
    • docs/*.md for detailed explanations

  3. Check if the target AGENTS.md already has related content:

    • If multiple related items exist, consider extracting to a docs/ page
    • If adding would make the file too long (>60 lines for root), extract to docs/

  4. Apply changes following the writing style in the guidelines

  5. List what was updated and why

© cashew-labs, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in .agents/skills/update-docs of cashew-labs/libretto.

  • SKILL.md
  • references/updating-agents-docs.md

Open the folder on GitHubat commit 41ab782

Compare with similar skills

Update Docs next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Update Docs compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Update Docs this skillcashew-labs/libretto904—~278Automated safety check: PassMIT
Using Agent Skillsaddyosmani/agent-skills103k4 repos~2.4kAutomated safety check: PassMIT
Claude ReflectBayramAnnakov/claude-reflect1.7k2 repos~627Automated safety check: PassMIT
Writing For Agentsbestofjs/bestofjs3.1k19 repos~2.7kAutomated safety check: PassMIT
Neat-Freak Knowledge CloseoutKKKKhazix/khazix-skills21k—~1.9kAutomated safety check: PassMIT
Task Observerrebelytics/one-skill-to-rule-them-all3.2k1 repos~12kAutomated safety check: PassCC-BY-4.0

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Categories

Questions about Update Docs

What does Update Docs do?

Update AGENTS.md files based on session learnings about a topic. Update Docs is an agent skill from cashew-labs/libretto.md files based on session learnings about a topic.

When should I use Update Docs?

Update Docs fits situations like: documenting patterns; conventions discovered during development.

How do I install Update Docs in Claude Code?

Run `npx skills add cashew-labs/libretto --skill update-docs -a claude-code`. Or copy the skill folder (.agents/skills/update-docs in cashew-labs/libretto) into .claude/skills/update-docs in your project. Claude Code loads it when a task matches its description.

How do I install Update Docs in Codex?

Run `npx skills add cashew-labs/libretto --skill update-docs -a codex`. Or copy the skill folder (.agents/skills/update-docs in cashew-labs/libretto) into .agents/skills/update-docs in your project. Codex loads it when a task matches its description.

Can I use Update Docs in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add cashew-labs/libretto --skill update-docs -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/update-docs, .gemini/skills/update-docs, .github/skills/update-docs and .opencode/skills/update-docs in your project.

What does Update Docs need to run?

SKILL.md names no scripts, command-line tools or credentials: Update Docs is instructions for the agent only.

Does Update Docs access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Update Docs safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Update Docs use?

Update Docs is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Update Docs use?

About 278 tokens (SKILL.md is roughly 1.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 988 tokens, read only when the agent opens those files.

What are the alternatives to Update Docs?

Skills that share tags, products or a category with Update Docs: Using Agent Skills (addyosmani/agent-skills, 103k stars), Claude Reflect (BayramAnnakov/claude-reflect, 1.7k stars), Writing For Agents (bestofjs/bestofjs, 3.1k stars) and Neat-Freak Knowledge Closeout (KKKKhazix/khazix-skills, 21k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Update Docs?

cashew-labs (a GitHub organization) maintains it in cashew-labs/libretto, which has 904 GitHub stars. The repository holds 21 skills in this directory. The repository was last updated on August 21, 2026.

Source: cashew-labs/libretto on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.