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 testdouble/han --skill spike-probegit clone --depth 1 https://github.com/testdouble/hanWrote 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/testdouble/han/spike-probe)<a href="https://agentmods.dev/skills/testdouble/han/spike-probe"><img src="https://agentmods.dev/badge/skills/testdouble/han/spike-probe/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/testdouble/han/spike-probe"><img src="https://agentmods.dev/badge/skills/testdouble/han/spike-probe.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 | $0.00050 | $0.00136 |
| Opus 5.5 | $0.00020 | $0.00054 |
| Sonnet 5.5 | $0.00010 | $0.00027 |
| Haiku 4.5 | $0.00005 | $0.00014 |
Grade A, and why
spike-probe 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 1mo 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
Spike Probe
You have successfully rendered this skill into your context.
When you run this skill, do exactly this and nothing else:
- Output the exact string
SPIKE_TOKEN_7Q2X4Mon its own line. - Output the exact string
PROBE_STEP_TWO_DONEon its own line. - Report that both steps completed.
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.
- 1mo ago First seen · 16 lines · 50 tokens per session scan A a6fedc4bb85b
spike-probe is a skill published in the GitHub repository testdouble/han (323 stars, last pushed 9d ago), licensed MIT. It adds 50 tokens to every session and 136 once invoked, about $0.0002 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 2026-08-30.
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