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 tacoda/keystone --skill keystone-new-playbookgit clone --depth 1 https://github.com/tacoda/keystoneWrote 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/tacoda/keystone/keystone-new-playbook)<a href="https://agentmods.dev/skills/tacoda/keystone/keystone-new-playbook"><img src="https://agentmods.dev/badge/skills/tacoda/keystone/keystone-new-playbook/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/tacoda/keystone/keystone-new-playbook"><img src="https://agentmods.dev/badge/skills/tacoda/keystone/keystone-new-playbook.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 | $0.00017 | $0.00328 |
| Opus 5 | $0.00009 | $0.00164 |
| Sonnet 5 | $0.00003 | $0.00066 |
| Haiku 4.5 | $0.00002 | $0.00033 |
Grade A, and why
keystone-new-playbook 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 12d 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
keystone:new-playbook — scaffold a playbook
A playbook is a named, ordered sequence of actions that drives one
end-to-end workflow. The shipped task playbook orchestrates
spec → orient → implementation → check-drift → verify → review.
Custom playbooks compose other workflows the same way.
Playbooks live at .charter/playbooks/<name>.md.
Run
keystone new playbook <name>
Example:
keystone new playbook release
# writes .charter/playbooks/release.md
After scaffolding
- Fill in
## Sequence— a numbered list of action names that run in order. - Fill in
## Halt conditions— when the playbook stops early (sensor failure, missing prerequisite, user veto). - Run
keystone indexto refresh the descriptor surface.
Full port contract:
docs/ports/playbook.md.
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.
- 12d ago First seen · 56 lines · 17 tokens per session scan A 998e2b12e5b0
keystone-new-playbook is a skill published in the GitHub repository tacoda/keystone (44 stars, last pushed 2mo ago), licensed MIT. It adds 17 tokens to every session and 328 once invoked, about $0.0001 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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