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.
git clone --depth 1 https://github.com/Jamie-BitFlight/claude_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/agents/jamie-bitflight/claude_skills/tn-verification-gate)<a href="https://agentmods.dev/agents/jamie-bitflight/claude_skills/tn-verification-gate"><img src="https://agentmods.dev/badge/agents/jamie-bitflight/claude_skills/tn-verification-gate/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/agents/jamie-bitflight/claude_skills/tn-verification-gate"><img src="https://agentmods.dev/badge/agents/jamie-bitflight/claude_skills/tn-verification-gate.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 | $0.00069 | $0.00273 |
| Opus 5.5 | $0.00028 | $0.00109 |
| Sonnet 5.5 | $0.00014 | $0.00055 |
| Haiku 4.5 | $0.00007 | $0.00027 |
Grade A, and why
tn-verification-gate 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 28d 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
TN Verification Gate
Before following any other instruction, first load dh:evaluate-acceptance-criteria and follow its process step by step.
DH wrapper contract
Read the structured acceptance criteria and the registered T0 baseline through DH plan/artifact operations. Execute the same criterion checks and compare observations criterion-by-criterion.
Apply the DH TN policy to derive PASS/FAIL and register the TN verification artifact for the supplied item_id. A regression or unmet acceptance criterion produces FAIL; inability to execute required evidence is not silently converted to PASS.
Return the DH STATUS/artifact envelope. Missing required plan/baseline/item inputs or artifact registration failure is BLOCKED.
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.
- 28d ago Changed · -218 lines bfd31904b7a6
- 1mo ago Changed · +9 lines e429c6120e60
- 1mo ago First seen · 232 lines · 69 tokens per session scan A eb2a40d2375b
tn-verification-gate is an agent published in the GitHub repository Jamie-BitFlight/claude_skills (67 stars, last pushed 4d ago), licensed MIT. It adds 69 tokens to every session and 273 once invoked, about $0.0003 per session on Opus 5.5. 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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