ghostclaw: Skill for Claude Code

.claude/skills/add-update-check/SKILL.md

add-update-check is a skill for Claude Code from b1rdmania/ghostclaw. It costs 33 tokens per session (577 once invoked), scanned A, original, MIT.

A scheduled monthly check for new commits in the GhostClaw code repository. A commit is a saved change in version control.

In plain words
What is it for?
Fetching the latest repository history, counting new commits, summarizing them, and notifying you in the main chat.
Why use it?
It tells you when updates are available while leaving the decision to review and apply them to you. It never updates the system automatically.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions Claude Code.

This is b1rdmania/ghostclaw's own configuration. It tells Claude Code how to work on ghostclaw itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything ghostclaw configures →

Reuse

Borrowing it

Nothing to install: this file belongs to b1rdmania/ghostclaw. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/b1rdmania/ghostclaw/main/.claude/skills/add-update-check/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/b1rdmania/ghostclaw

Made for: Claude Code.

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 add-update-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/b1rdmania/ghostclaw/add-update-check.svg)](https://agentmods.dev/skills/b1rdmania/ghostclaw/add-update-check)
Your own site
<a href="https://agentmods.dev/skills/b1rdmania/ghostclaw/add-update-check"><img src="https://agentmods.dev/badge/skills/b1rdmania/ghostclaw/add-update-check.svg" alt="Measured on agentmods" height="20"></a>
Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 577 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 $0.00033 $0.00577
Opus 5 $0.00016 $0.00289
Sonnet 5 $0.00007 $0.00115
Haiku 4.5 $0.00003 $0.00058

Measured 8d ago against content hash 5d37a1552a27, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

add-update-check 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 8d 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.

.claude/skills/add-update-check/SKILL.md · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Add Update Check

Registers a monthly scheduled task that checks the GhostClaw repo for new commits and notifies the user if updates are available.

Setup

Find the main group's chat JID:

sqlite3 store/messages.db "SELECT jid FROM registered_groups WHERE folder = 'main' LIMIT 1;"

Register the task:

CHAT_JID="<main chat JID>"
cat > data/ipc/main/tasks/update_check_$(date +%s).json << EOF
{
  "type": "schedule_task",
  "prompt": "Check for GhostClaw updates.\n\n1. Run: git fetch origin 2>&1\n2. Run: git log HEAD..origin/main --oneline\n3. If there are new commits, message the user with how many and a one-line summary of each.\n4. If no new commits, respond with <internal>GhostClaw is up to date</internal> and nothing else.\n\nWhen notifying about updates, always include:\n- Number of new commits\n- One-line summary of each\n- Remind them: 'Review the changes with git diff HEAD..origin/main — then run /update-ghostclaw in Claude Code to apply safely (it backs up, migrates, rebuilds, and restarts).'\n- Remind them to review for security — this code runs with full system access.",
  "schedule_type": "cron",
  "schedule_value": "0 10 * * 1",
  "context_mode": "isolated",
  "targetJid": "$CHAT_JID"
}
EOF

This runs at 10am on the every Monday.

What the user sees

If updates are available:

3 new GhostClaw commits available:

  • abc1234 Add heartbeat disk usage threshold config
  • def5678 Fix Telegram reconnection on network change
  • ghi9012 Update Grammy to 1.25

Review the changes before applying. This code runs with full system access. Run git diff HEAD..origin/main to see the full diff. When ready, run /update-ghostclaw in Claude Code to apply safely.

If up to date: silence (wrapped in <internal> tags).

Security note

This skill deliberately does NOT auto-update. The user must:

  1. Review the diff
  2. Understand what changed
  3. Run /update-ghostclaw to apply safely (or apply manually)

GhostClaw runs bare metal with no sandboxing. Blindly pulling code is a security risk.

Read the full file on GitHub · 58 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. 8d ago First seen · 58 lines · 33 tokens per session scan A 5d37a1552a27

Subscribe to this mod's changes

add-update-check is a skill published in the GitHub repository b1rdmania/ghostclaw (92 stars, last pushed 4mo ago), licensed MIT. It adds 33 tokens to every session and 577 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 2026-08-30.

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