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.
npx skills add JeonJe/claude-plugins --skill skillbookgit clone --depth 1 https://github.com/JeonJe/claude-pluginsWrote 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.
[](https://agentmods.dev/skills/jeonje/claude-plugins/skillbook)<a href="https://agentmods.dev/skills/jeonje/claude-plugins/skillbook"><img src="https://agentmods.dev/badge/skills/jeonje/claude-plugins/skillbook/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.
<a href="https://agentmods.dev/skills/jeonje/claude-plugins/skillbook"><img src="https://agentmods.dev/badge/skills/jeonje/claude-plugins/skillbook.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00039 | $0.00510 |
| Opus 5.5 | $0.00016 | $0.00204 |
| Sonnet 5.5 | $0.00008 | $0.00102 |
| Haiku 4.5 | $0.00004 | $0.00051 |
Grade A, and why
skillbook 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 1mo 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.
What it actually says
Skillbook - Pokemon Pokedex-style Skill Dashboard
Use Cases
1. Open Dashboard (default)
- Input: "skillbook", "skill stats", "open dashboard"
- Action: Generate and open web dashboard in browser
- Output: Pokemon card UI + charts + achievement badges
2. Query Specific Skill
- Input: "gg skill stats"
- Action: Highlight skill in dashboard
- Output: Skill card + usage history
3. Category Overview
- Input: "study skills overview"
- Action: Filter by category
- Output: Filtered skill list + progress
4. Terminal Mode
- Input: "skillbook terminal stats"
- Action: Text-based output in CLI
- Output: Compact skill list with levels and rarity
5. Install/Setup
- Input: "skillbook install", "setup skillbook"
- Action: Run automatic installer (setup hooks, config, files)
- Output: Installation status with component verification
6. Uninstall
- Input: "skillbook uninstall"
- Action: Remove hooks and optionally skill files
- Output: Uninstallation summary
7. Check Status
- Input: "skillbook status"
- Action: Verify all components are correctly installed
- Output: Component health check table
Don't use when
- Skill quality audit -> use skill-audit instead
- Editing skill definitions -> edit SKILL.md directly
Execution
Default (dashboard):
python3 <SKILL_DIR>/skillbook.py dashboard
Install:
python3 <SKILL_DIR>/skillbook.py install
Uninstall:
python3 <SKILL_DIR>/skillbook.py uninstall
Check status:
python3 <SKILL_DIR>/skillbook.py status
Runs immediately on skill invocation, outputs directly.
Data
Stats file: ~/.claude/skillbook-stats.json (default)
Custom location: create ~/.claude/skillbook.config.json:
{
"statsFile": "~/your/path/skill-stats.json"
}
statsFile must be under your home directory (~).
What ships with it
7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 1mo ago First seen · 86 lines · 39 tokens per session scan A ce0e00c68f66
skillbook is a skill published in the GitHub repository JeonJe/claude-plugins (3 stars, last pushed 4d ago), licensed MIT. It adds 39 tokens to every session and 510 once invoked, about $0.0002 per session on Opus 5.5. 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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