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 agentmods add commands/kid-sid/claude-spellbook/skill-validategit clone --depth 1 https://github.com/kid-sid/claude-spellbookWrote 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/commands/kid-sid/claude-spellbook/skill-validate)<a href="https://agentmods.dev/commands/kid-sid/claude-spellbook/skill-validate"><img src="https://agentmods.dev/badge/commands/kid-sid/claude-spellbook/skill-validate.svg" alt="Measured on agentmods" 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 | $0.00000 | $0.01166 |
| Opus 5 | $0.00000 | $0.00583 |
| Sonnet 5 | $0.00000 | $0.00233 |
| Haiku 4.5 | $0.00000 | $0.00117 |
Grade A, and why
skill-validate scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 104 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Run local CI validation on all skills and agents in the spellbook — same checks as .github/workflows/ci.yml.
Instructions
Run the following checks and report results. Do NOT fix issues automatically — report them so the author can decide.
1. Skill Format Check
ERRORS=0
for skill in skills/*/skill.md; do
SKILL_ERRORS=0
head -1 "$skill" | grep -q "^---" || { echo " FAIL [$skill]: Missing frontmatter (first line must be ---)"; SKILL_ERRORS=1; }
grep -q "^name:" "$skill" || { echo " FAIL [$skill]: Missing name: field"; SKILL_ERRORS=1; }
grep -q "^description:" "$skill" || { echo " FAIL [$skill]: Missing description: field"; SKILL_ERRORS=1; }
grep -q "## When to Activate" "$skill" || { echo " FAIL [$skill]: Missing ## When to Activate section"; SKILL_ERRORS=1; }
grep -q "## Checklist" "$skill" || { echo " FAIL [$skill]: Missing ## Checklist section"; SKILL_ERRORS=1; }
grep -q "\- \[ \]" "$skill" || { echo " FAIL [$skill]: Checklist has no '- [ ]' items"; SKILL_ERRORS=1; }
[ $SKILL_ERRORS -eq 0 ] && echo " PASS [$skill]"
ERRORS=$((ERRORS + SKILL_ERRORS))
done
2. Agent Format Check
VALID_MODELS="sonnet opus haiku inherit"
VALID_COLORS="red blue green yellow purple orange"
for agent in .claude/agents/*.md; do
AGENT_ERRORS=0
head -1 "$agent" | grep -q "^---" || { echo " FAIL [$agent]: Missing frontmatter"; AGENT_ERRORS=1; }
grep -q "^name:" "$agent" || { echo " FAIL [$agent]: Missing name:"; AGENT_ERRORS=1; }
grep -q "^description:" "$agent" || { echo " FAIL [$agent]: Missing description:"; AGENT_ERRORS=1; }
grep -q "^tools:" "$agent" || { echo " FAIL [$agent]: Missing tools:"; AGENT_ERRORS=1; }
grep -q "^model:" "$agent" || { echo " FAIL [$agent]: Missing model:"; AGENT_ERRORS=1; }
MODEL=$(grep "^model:" "$agent" | head -1 | sed 's/model:[[:space:]]*//')
echo "$VALID_MODELS" | grep -qw "$MODEL" || { echo " FAIL [$agent]: model '$MODEL' not in ($VALID_MODELS)"; AGENT_ERRORS=1; }
[ $AGENT_ERRORS -eq 0 ] && echo " PASS [$agent]"
ERRORS=$((ERRORS + AGENT_ERRORS))
done
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.
- 4d ago First seen · 104 lines · 0 tokens per session scan A 369a5301f302
skill-validate is a command published in the GitHub repository kid-sid/claude-spellbook (187 stars, last pushed 29d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,166 tokens. 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.
Other commands, from other repositories
git
Git operations with intelligent commit messages and workflow optimization.
checklist
Generate a custom checklist for the current feature based on user requirements.
clarify
Identify underspecified areas in the current feature spec by asking up to 5 highly targeted clarification questions and encoding answers back into the spec.
specify
Create or update the feature specification from a natural language feature description.
analyze
Perform a non-destructive cross-artifact consistency and quality analysis across spec.md, plan.md, and tasks.md after task generation.
converge
Assess the current codebase against the feature's spec, plan, and tasks, then append any remaining unbuilt work as new tasks to tasks.md so implement can complete it.