craft-update-self

craft-update-self is a skill for Claude Code, Codex from derjochenmeyer/claude-code-craft. It costs 25 tokens per session (922 once invoked), scanned D, original, MIT.

An update checker for a group of installed Claude Code craft skills. It compares local versions with versions available from the project's online source and can apply updates.

In plain words
What is it for?
Checking skill versions, detecting newly available craft skills, and updating the installed set when requested.
Why use it?
It helps reveal outdated or missing skills so the project's Claude Code toolkit does not quietly fall behind.

Skill for Claude CodeCodex

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/derjochenmeyer/claude-code-craft/craft-update-self
Any agent
npx skills add derjochenmeyer/claude-code-craft --skill craft-update-self
Clone the repo
git clone --depth 1 https://github.com/derjochenmeyer/claude-code-craft

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 craft-update-self

README.md
[![agentmods](https://agentmods.dev/badge/skills/derjochenmeyer/claude-code-craft/craft-update-self.svg)](https://agentmods.dev/skills/derjochenmeyer/claude-code-craft/craft-update-self)
Your own site
<a href="https://agentmods.dev/skills/derjochenmeyer/claude-code-craft/craft-update-self"><img src="https://agentmods.dev/badge/skills/derjochenmeyer/claude-code-craft/craft-update-self.svg" alt="Measured on agentmods" height="20"></a>
Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 922 The whole file, excluding the scripts and references it only reads on demand.
Security scan D 3 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 $0.00025 $0.00922
Opus 5 $0.00013 $0.00461
Sonnet 5 $0.00005 $0.00184
Haiku 4.5 $0.00003 $0.00092

Measured 4d ago against content hash 1fbd5db8b73d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade D, and why

craft-update-self scanned grade D with 3 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -fsSL https://raw.githubusercontent.com/derjochenmeyer/claude-code-craft-statusline/main/install.sh | bash

Enumerates other installed skillsmediumAgent snooping

Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.

## Step 1: Read installed skills

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

remote_ver=$(curl -sf "$GITHUB_RAW/skills/$skill/SKILL.md" | grep "^version:" | head -1 | awk '{print $2}')
skills/craft-update-self/SKILL.md · 132 lines

How it starts

The opening of the file, as written. The whole thing — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.

craft-update-self

Check for updates to your installed craft skills. Completes in a single response.

Usage

/craft-update-self          check for updates, show what is available
/craft-update-self apply    check and apply all updates in one go

Step 1: Read installed skills

SKILLS_DIR="$HOME/.claude/skills"
GITHUB_RAW="https://raw.githubusercontent.com/derjochenmeyer/claude-code-craft/main"

SKILLS=(
  craft-project-setup
  craft-project-status
  craft-project-audit
  craft-project-audit-full
  craft-project-dream
  craft-project-remember
  craft-project-explore
  craft-global-audit
  craft-session-solidify
  craft-update-self
)

for skill in "${SKILLS[@]}"; do
  target="$SKILLS_DIR/$skill/SKILL.md"
  if [[ -f "$target" ]]; then
    local_ver=$(grep "^version:" "$target" | head -1 | awk '{print $2}')
  else
    local_ver="not installed"
  fi
  remote_ver=$(curl -sf "$GITHUB_RAW/skills/$skill/SKILL.md" | grep "^version:" | head -1 | awk '{print $2}')
  echo "$skill|$local_ver|${remote_ver:-unavailable}"
done

The statusline lives in its own repo and tracks its own version — this skill only manages craft skills. To update the statusline, re-run its installer:

curl -fsSL https://raw.githubusercontent.com/derjochenmeyer/claude-code-craft-statusline/main/install.sh | bash

Step 2: Compare versions and classify

For each skill, classify as:

  • up to date: local version == remote version
  • update available: local version != remote version (and both are valid semver)
  • new skill: skill is not installed locally but exists on GitHub
  • unavailable: could not fetch remote version (network issue or skill removed)

Do NOT classify "unavailable" as an update. Skip it silently.


Step 3: Output

No apply arg — check only

Show a compact table:

craft skills                  installed    latest

  craft-project-setup         1.0.0        1.0.0   ✅
  craft-project-status        1.0.0        1.0.0   ✅
  craft-project-audit         1.0.0        1.0.0   ✅
  craft-global-audit          1.0.0        1.0.1   ⬆️  update available
  craft-update-self           —            1.0.0   ✨  new skill

Read the full file on GitHub · 132 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. 4d ago First seen · 132 lines · 25 tokens per session scan D 1fbd5db8b73d

Subscribe to this mod's changes

craft-update-self is a skill published in the GitHub repository derjochenmeyer/claude-code-craft (2 stars, last pushed 4mo ago), licensed MIT. It adds 25 tokens to every session and 922 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it D with 3 findings (downloads and executes remote code, enumerates other installed skills, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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