Borrowing it
Nothing to install: this file belongs to openclosed-org/axum-harness. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/openclosed-org/axum-harness/main/.agents/skills/harness-grill/SKILL.mdgit clone --depth 1 https://github.com/openclosed-org/axum-harnessWrote 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/openclosed-org/axum-harness/harness-grill)<a href="https://agentmods.dev/skills/openclosed-org/axum-harness/harness-grill"><img src="https://agentmods.dev/badge/skills/openclosed-org/axum-harness/harness-grill/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/openclosed-org/axum-harness/harness-grill"><img src="https://agentmods.dev/badge/skills/openclosed-org/axum-harness/harness-grill.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 | $0.00049 | $0.00376 |
| Opus 5.5 | $0.00020 | $0.00150 |
| Sonnet 5.5 | $0.00010 | $0.00075 |
| Haiku 4.5 | $0.00005 | $0.00038 |
Grade A, and why
harness-grill 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 2mo 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
Harness Grill
Use this skill to reach shared understanding before code or docs change.
Workflow skills guide process. Ownership skills still decide writable boundaries.
Process
- Read
AGENTS.md,agent/codemap.yml,docs/architecture/north-star.md, anddocs/architecture/harness-philosophy.md. - Explore executable sources when they can answer the question. Do not ask the user to restate facts the codebase can show.
- Walk the decision tree one question at a time.
- For each question, provide your recommended answer and why.
- Use
declared,checked,tested, andprovenprecisely. - Record unresolved vocabulary in
docs/_local/**only when useful, without promoting it into tracked docs by default. - Offer an ADR only when the decision is hard to reverse, surprising without context, and a real trade-off.
Challenge Rules
- If user wording conflicts with
AGENTS.md,agent/codemap.yml, accepted ADRs, or executable evidence, call out the conflict directly. - If a claim conflicts with executable evidence, surface the mismatch and ask which should change.
- If the plan mixes current state, target state, file maps, and roadmap, recommend splitting before implementation.
- If optional lanes are becoming backend-core prerequisites, flag drift.
Stop Condition
Stop when the next implementation step, owner boundary, evidence expectation, and out-of-scope set are clear enough to hand to an ownership skill or agent brief.
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.
- 2mo ago First seen · 35 lines · 49 tokens per session scan A 38c669d38c26
harness-grill is a skill published in the GitHub repository openclosed-org/axum-harness (51 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 49 tokens to every session and 376 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.
harness-grill compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| harness-grillopenclosed-org/axum-harness | Skill | 51 | 5mo ago | Apache-2.0 | A | 49 | Claude Code, Codex |
| architecture-paradigm-microservicesathola/claude-night-market | Skill | 348 | yesterday | MIT | A | 33 | Claude Code |
| microservices-expertpersonamanagmentlayer/pcl | Skill | 44 | 11d ago | Apache-2.0 | A | 52 | Claude Code |
| architecture-governancebeyondnetcode/evolith_arch32 | Skill | 2 | 5d ago | MIT | A | 76 | Claude Code, Codex |
| microservices-patternsbooklib-ai/booklib | Skill | 40 | 7mo ago | MIT | A | 131 | Claude Code, Codex |
| distributed-feasibility-checkerbookforge-ai/bookforge-skills | Skill | 42 | 6mo ago | CC-BY-SA-4.0 | A | 86 | Claude Code |
| contract-testingproffesor-for-testing/agentic-qe | Skill | 525 | yesterday | MIT | A | 35 | Claude Code |