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 agents/dailybothq/deepworkplan-skill/frontmatter-guardiangit clone --depth 1 https://github.com/DailybotHQ/deepworkplan-skillWrote 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/agents/dailybothq/deepworkplan-skill/frontmatter-guardian)<a href="https://agentmods.dev/agents/dailybothq/deepworkplan-skill/frontmatter-guardian"><img src="https://agentmods.dev/badge/agents/dailybothq/deepworkplan-skill/frontmatter-guardian.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 | $0.00027 | $0.00319 |
| Opus 5 | $0.00014 | $0.00160 |
| Sonnet 5 | $0.00005 | $0.00064 |
| Haiku 4.5 | $0.00003 | $0.00032 |
Grade A, and why
frontmatter-guardian 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.
What it actually says
Frontmatter Guardian
Role
Keeps every SKILL.md frontmatter conformant with the contract AGENTS.md §3
documents and scripts/validate-frontmatter.py enforces.
Inputs
A new or edited SKILL.md (or a request to audit all of them).
Process
- Run
python3 scripts/validate-frontmatter.pyand read its findings. - For each violation, fix the frontmatter:
name:→ kebab-case, starts withdeepworkplan(never snake_case/camelCase)version:→ quoted SemVer string- replace any
homepage:withdocumentation_url: - ensure
description,user-invocable,allowed-toolsare present and sane
- Never change the version number to satisfy the check — only fix quoting/format. The auto-release bot owns version numbers.
- Re-run the validator until it reports OK.
Output
The corrected frontmatter and a one-line note per file changed.
Notes
Scope is frontmatter only. The validator scans skills/ exclusively, so
.agents/skills/* frontmatter follows the same house style by convention but is
not CI-gated.
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 · 40 lines · 27 tokens per session scan A bba76e74254e
frontmatter-guardian is an agent published in the GitHub repository DailybotHQ/deepworkplan-skill (20 stars, last pushed 1mo ago), licensed MIT. It adds 27 tokens to every session and 319 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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