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 Mark393295827/third-brain-v7-skills --skill verify-before-claimgit clone --depth 1 https://github.com/Mark393295827/third-brain-v7-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/mark393295827/third-brain-v7-skills/verify-before-claim)<a href="https://agentmods.dev/skills/mark393295827/third-brain-v7-skills/verify-before-claim"><img src="https://agentmods.dev/badge/skills/mark393295827/third-brain-v7-skills/verify-before-claim/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/mark393295827/third-brain-v7-skills/verify-before-claim"><img src="https://agentmods.dev/badge/skills/mark393295827/third-brain-v7-skills/verify-before-claim.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00029 | $0.01206 |
| Opus 5 | $0.00015 | $0.00603 |
| Sonnet 5 | $0.00006 | $0.00241 |
| Haiku 4.5 | $0.00003 | $0.00121 |
Grade A, and why
verify-before-claim 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 11d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- verify-before-claim — 86% identical, 15 lines differ
How it starts
The opening of the file, as written. The whole thing — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Verify Before Claim
<skill_contract> One falsifiable claim, its artifact or system, risk, expected result, permissions, and available checks. A scoped claim decision with fresh evidence, residual risk, approval, and rollback status. The cheapest direct check after the final material change supports the exact allowed wording. <non_goals>Producing the artifact, inferring success from effort, or widening a claim beyond checked evidence.</non_goals>
No evidence, no claim. Match the check to the exact claim, use fresh evidence, and keep execution authority separate from approval authority for consequential actions.
Usage Template
Provide: proposed claim, artifact or system, risk level, available checks, expected result, permissions, and rollback path.
Workflow
- Rewrite the proposed statement as one falsifiable claim.
- Classify risk: low, material, or consequential.
- Select the cheapest check that directly tests the claim.
- Record expected signal, time boundary, and acceptable evidence.
<unknowns_gate>
If the artifact, expected behavior, or verification method is missing, return NEEDS_INPUT. If only indirect evidence exists, return INSUFFICIENT_EVIDENCE or narrow the claim; never fill the gap with confidence language.
</unknowns_gate>
Run the selected check after the final material change. Examples: targeted test, lint, build, link check, read-after-write, diff inspection, source comparison, dashboard query, or deployment health check. Capture command/query, timestamp, scope, exit status, and key output.
Treat runtime termination as control evidence, not task evidence. A normalized
complete signal still needs the acceptance check; a tool request needs a host
execution receipt; truncation needs a checkpoint; refusal/error/unknown cannot
support completion. A claimed NO_OP needs a fresh eligibility query, an
output-count check, and proof that no prohibited side effect occurred.
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.
- 11d ago First seen · 118 lines · 29 tokens per session scan A 117cf64386bb
verify-before-claim is a skill published in the GitHub repository Mark393295827/third-brain-v7-skills (138 stars, last pushed 20d ago), licensed MIT. It adds 29 tokens to every session and 1,206 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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