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 Stijnman/grok-custom-skills --skill skill-collection-bootstrappergit clone --depth 1 https://github.com/Stijnman/grok-custom-skillsWrote 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/stijnman/grok-custom-skills/skill-collection-bootstrapper)<a href="https://agentmods.dev/skills/stijnman/grok-custom-skills/skill-collection-bootstrapper"><img src="https://agentmods.dev/badge/skills/stijnman/grok-custom-skills/skill-collection-bootstrapper/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/stijnman/grok-custom-skills/skill-collection-bootstrapper"><img src="https://agentmods.dev/badge/skills/stijnman/grok-custom-skills/skill-collection-bootstrapper.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 | $0.00048 | $0.00531 |
| Opus 5 | $0.00024 | $0.00266 |
| Sonnet 5 | $0.00010 | $0.00106 |
| Haiku 4.5 | $0.00005 | $0.00053 |
Grade A, and why
skill-collection-bootstrapper 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.
What it actually says
Skill Collection Bootstrapper
When to Use
- User says bootstrap skills or task matches this capability
- User says complete skill collection or task matches this capability
- User says install skill repo or task matches this capability
Workflow
- Inventory SKILL.md files vs README skill list; report missing names.
- Run skill-rubric-reviewer on stubs scoring below 30/50.
- Regenerate or patch weak skills; validate frontmatter and required sections.
- Show diff summary before install; require user approval to overwrite existing skills.
- Copy approved skills to ~/.grok/skills/ or workspace .grok/skills/.
- Update SKILLS_INDEX.md if maintaining a repo.
Integrations
skill-rubric-reviewerskill-evolverhitl-approvergoal-verifier
Error Handling
| Failure | Response |
|---|---|
| Name collision | List conflicts; default to skip unless user approves overwrite. |
| Validation fail | Block install for failed SKILL.md; report path and errors. |
Gotchas
- Never overwrite bundled skills without explicit user approval.
Safety & Ethics (Publication-Ready)
This skill is designed for public distribution. Constraints:
- User must approve before overwriting installed skills.
- No execution of untrusted scripts from skill folders during bootstrap.
- Validate SKILL.md structure before install.
Prohibited actions
- No unauthorized access, malware, or harmful automation
- No silent exfiltration of data, credentials, or telemetry
- No destructive system changes without hitl-approver
- No publication of user PII or environment secrets in outputs
Example
Input: User request matching triggers above. Output: Structured result per workflow; local artifacts only unless user opts in.
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.
- 9d ago First seen · 67 lines · 48 tokens per session scan A 9eb355424f10
skill-collection-bootstrapper is a skill published in the GitHub repository Stijnman/grok-custom-skills (9 stars, last pushed yesterday), licensed MIT. It adds 48 tokens to every session and 531 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 2026-09-03.
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