update-skills

update-skills is a skill for Claude Code from sbusso/claudeclaw. It costs 16 tokens per session (1,197 once invoked), scanned A, original, MIT.

A skill for checking installed skill branches in Git, a system for tracking changes, against their upstream versions.

In plain words
What is it for?
Use it to find available updates, select skills to update, merge those branches, and validate the result.
Why use it?
It shows whether installed skills have updates while protecting local work and requiring a clean working tree before merging.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: names the AskUserQuestion tool; mentions Claude Code.

Part of the claudeclaw plugin — 27 skills shipped together

Good fit Use it to find available updates, select skills to update, merge those branches, and validate the result.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sbusso/claudeclaw/update-skills
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 sbusso/claudeclaw --skill update-skills
Clone the repo
git clone --depth 1 https://github.com/sbusso/claudeclaw

Made for: Claude Code.

Or install claudeclaw, the plugin that ships this one along with the rest of its 27 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 update-skills

README.md
[![agentmods](https://agentmods.dev/badge/skills/sbusso/claudeclaw/update-skills/github.svg)](https://agentmods.dev/skills/sbusso/claudeclaw/update-skills)
Your own site
<a href="https://agentmods.dev/skills/sbusso/claudeclaw/update-skills"><img src="https://agentmods.dev/badge/skills/sbusso/claudeclaw/update-skills/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 update-skills

Your own site · 80×15
<a href="https://agentmods.dev/skills/sbusso/claudeclaw/update-skills"><img src="https://agentmods.dev/badge/skills/sbusso/claudeclaw/update-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,197 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 pass 7 Sept 2026
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 $0.00016 $0.01197
Opus 5 $0.00008 $0.00598
Sonnet 5 $0.00003 $0.00239
Haiku 4.5 $0.00002 $0.00120

Measured 9d ago against content hash 7433306d189f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

update-skills 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 9d 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.

Origin

Copies of this mod

8 near-identical copies found in the catalogue:

skills/update-skills/SKILL.md · 131 lines

How it starts

The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.

About

Skills are distributed as git branches (skill/*). When you install a skill, you merge its branch into your repo. This skill checks upstream for newer commits on those skill branches and helps you update.

Run /update-skills in Claude Code.

How it works

Preflight: checks for clean working tree and upstream remote.

Detection: fetches upstream, lists all upstream/skill/* branches, determines which ones you've previously merged (via merge-base), and checks if any have new commits.

Selection: presents a list of skills with available updates. You pick which to update.

Update: merges each selected skill branch, resolves conflicts if any, then validates with build + test.


Goal

Help users update their installed skill branches from upstream without losing local customizations.

Operating principles

  • Never proceed with a dirty working tree.
  • Only offer updates for skills the user has already merged (installed).
  • Use git-native operations. Do not manually rewrite files except conflict markers.
  • Keep token usage low: rely on git commands, only open files with actual conflicts.

Step 0: Preflight

Run:

  • git status --porcelain

If output is non-empty:

  • Tell the user to commit or stash first, then stop.

Check remotes:

  • git remote -v

If upstream is missing:

  • Ask the user for the upstream repo URL (default: https://github.com/sbusso/claudeclaw.git).
  • git remote add upstream <url>

Fetch:

  • git fetch upstream --prune

Step 1: Detect installed skills with available updates

List all upstream skill branches:

  • git branch -r --list 'upstream/skill/*'

For each upstream/skill/<name>:

  1. Check if the user has merged this skill branch before:
    • git merge-base --is-ancestor upstream/skill/<name>~1 HEAD — if this succeeds (exit 0) for any ancestor commit of the skill branch, the user has merged it at some point. A simpler check: git log --oneline --merges --grep="skill/<name>" HEAD to see if there's a merge commit referencing this branch.
    • Alternative: MERGE_BASE=$(git merge-base HEAD upstream/skill/<name>) — if the merge base is NOT the initial commit and the merge base includes commits unique to the skill branch, it has been merged.
    • Simplest reliable check: compare git merge-base HEAD upstream/skill/<name> with git merge-base HEAD upstream/main. If the skill merge-base is strictly ahead of (or different from) the main merge-base, the user has merged this skill.
  2. Check if there are new commits on the skill branch not yet in HEAD:
    • git log --oneline HEAD..upstream/skill/<name>
    • If this produces output, there are updates available.

Read the full file on GitHub · 131 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. 9d ago First seen · 131 lines · 16 tokens per session scan A 7433306d189f

Subscribe to this mod's changes

update-skills is a skill published in the GitHub repository sbusso/claudeclaw (192 stars, last pushed 27d ago), licensed MIT. It adds 16 tokens to every session and 1,197 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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