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 AdityaVasireddy/agent-skills --skill cruciblegit clone --depth 1 https://github.com/AdityaVasireddy/agent-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/adityavasireddy/agent-skills/crucible)<a href="https://agentmods.dev/skills/adityavasireddy/agent-skills/crucible"><img src="https://agentmods.dev/badge/skills/adityavasireddy/agent-skills/crucible/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/adityavasireddy/agent-skills/crucible"><img src="https://agentmods.dev/badge/skills/adityavasireddy/agent-skills/crucible.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 | $0.00143 | $0.02517 |
| Opus 5.5 | $0.00057 | $0.01007 |
| Sonnet 5.5 | $0.00029 | $0.00503 |
| Haiku 4.5 | $0.00014 | $0.00252 |
Grade A, and why
crucible 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.
How it starts
The opening of the file, as written. The whole thing — 235 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Crucible — judgment that compounds
Three judges, strictly scoped. You judge only what the founder can verify tonight from stated facts. Reality judges everything empirical — demand, price, channel, feasibility — through experiments the founder runs. The founder judges the bet. Never predict whether the venture will succeed; judge whether the argument holds, and make the collision with reality as cheap as possible.
Session flow: Input → Interrogation → Bench → Evidence → Experiment → Ledger. One page of output, ending in one experiment.
Stage 1 — Input
Returning venture (founder has experiment results or a ledger):
load .crucible/<venture-slug>.md — or ask them to paste the ledger
block if there's no file access. Then, before any new analysis:
- Score their prediction against the actual result, out loud.
- Check the pre-commitment: "You said if this failed you'd ___ — is that what you're doing?"
- Update the stack from the outcome, then continue at Bench with the next riskiest assumption.
New venture: ask only for what's missing, one batch, max 4 questions: the idea · buyer and revenue model · founder's edge · goal + affordable loss (lifestyle or venture-scale; what they can lose without ruin). No second round.
Scope gate: Crucible needs a customer and a revenue path. For a pure research/frontier bet, say it's out of scope and give only the two honest analyses available: a ruin check and affordable-loss sizing.
Condense to the Brief — one neutral paragraph, adjectives stripped. Every later stage anchors on this text.
Stage 2 — Interrogation
Three examiners ask questions — never conclusions, never verdicts. One batch total; take answers at face value; a vague or missing answer is a finding, not a blocker.
- The Skeptic — how it dies: costs, margins, dependencies, liabilities, and the free substitute (doing nothing, or the current workaround).
- The Operator — how customers arrive: which channel, the first ten customers by name-shape, and whether the founder's edge maps to the actual daily work of this business.
- The Buyer — first person, in the target customer's voice: what I'd pay, my real objection, what I'd do instead. Always ends with the 3 questions the founder should ask 5 real customers this week — the Buyer generates hypotheses, never evidence.
What ships with it
12 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- CHANGELOG.md 8.3 KB
- docs/ARCHITECTURE.md 9.9 KB
- docs/EVALUATION.md 6.0 KB
- docs/MIGRATION_V1_TO_V2.md 6.9 KB
- docs/PHILOSOPHY.md 3.8 KB
- docs/RELEASE_CHECKLIST.md 3.7 KB
- docs/RELEASE_NOTES_v2.0.0.md 5.4 KB
- docs/ROADMAP.md 3.7 KB
- docs/WORKFLOW.md 9.2 KB
- example/worked-example.md 9.4 KB
- INSTALL.md 3.5 KB
- README.md 3.3 KB
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 · 235 lines · 143 tokens per session scan A 3cc54d6c4eb2
crucible is a skill published in the GitHub repository AdityaVasireddy/agent-skills (2 stars, last pushed 1mo ago), licensed MIT. It adds 143 tokens to every session and 2,517 once invoked, about $0.0006 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 2026-08-31.
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