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 HetCreep/CoalMine --skill gold-standardgit clone --depth 1 https://github.com/HetCreep/CoalMineWrote 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/hetcreep/coalmine/gold-standard)<a href="https://agentmods.dev/skills/hetcreep/coalmine/gold-standard"><img src="https://agentmods.dev/badge/skills/hetcreep/coalmine/gold-standard/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/hetcreep/coalmine/gold-standard"><img src="https://agentmods.dev/badge/skills/hetcreep/coalmine/gold-standard.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 | $0.00080 | $0.03753 |
| Opus 5 | $0.00040 | $0.01877 |
| Sonnet 5 | $0.00016 | $0.00751 |
| Haiku 4.5 | $0.00008 | $0.00375 |
Grade A, and why
gold-standard 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 6d 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 — 152 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Gold Standard
Language: Generate EVERYTHING at runtime in the user's language — questions, answer options, menu labels, recommendations, report narrative. Detect from their messages; never default to English just because this file is English. English is allowed only for technical terms: commands, paths, code identifiers, severity labels (CRITICAL/HIGH/MEDIUM/LOW), and tier names (Light/Standard/Heavy).
Config reads — every config key, always the CASCADE, never the bare project file: ~/.claude/.coalmine.json first, then the project config (own agent dir → other known agent dirs → legacy <gitroot>/.coalmine.json), project wins per key. A bare project read is ABSENT on a machine configured only globally, so it silently yields defaults.
Answer: "For a project that does THIS — are rules/standards/features 100% vs world-class? If not, what's missing?"
Four acts: AUDIT → FILL → ADOPT → CONFORM. Stop at any.
Manual /gold-standard = interactive setup: read references/wizard.md (dual-audience — layman 1-question default · programmer order→bill→pay). The auto/keyword path (the Triggers table) skips it.
Triggers
| Keyword | Act |
|---|---|
| "audit rules" / "gold-standard" / "are we world-class" | AUDIT |
| "fill gaps" / "complete our rules" | FILL |
| "work by these rules" / "follow from now on" | ADOPT |
| "conform old code" / "retrofit" | CONFORM |
"fill and adopt" / ACTION=fill-adopt |
AUDIT → FILL → summary → ADOPT → offer CONFORM |
Consent gates (G1–G6, declared)
| # | what it gates | when it fires | Agent lane | Hook lane |
|---|---|---|---|---|
| G1 | model tier | before work starts | ask_question, 3 tiers, wait for pick |
suppressed — auto-Light, no tier question |
| G2 | ADOPT | before treating the ruleset as binding | ask_question |
ask_question |
| G3 | CONFORM fix | before each fix | ask_question |
ask_question |
| G4 | RE-VALIDATE change | any re-stamp / rewrite / delete / consistency-fix | ask_question |
ask_question |
| G5 | entanglement hand-off | after the report, cross-domain finding | ask_question, once |
ask_question, once |
| G6 | self error-report | skill misbehaves | offer, never auto-submit | offer, never auto-submit |
What ships with it
4 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.
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.
- 6d ago Changed · +2 lines 642a26f6ed1e
- 10d ago First seen · 150 lines · 80 tokens per session scan A a00cf1e07806
gold-standard is a skill published in the GitHub repository HetCreep/CoalMine (12 stars, last pushed today), licensed Apache-2.0. It adds 80 tokens to every session and 3,753 once invoked, about $0.0004 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.
Other skills, from other repositories
flockion_code_review
Reviews Flockion code, diffs, pull requests, generated files, and refactors for correctness, simplicity, maintainability, file size, type safety, accessibility, security, observability, and overengineering. Use for TypeScript, React, Python, APIs, agents, YAML, Bicep, GitHub Actions, and cloud automation code.
agent-watchdog
Use when asked to watch, babysit, audit, review, compare, or fix another agent's work from a Codex session ID, Claude Code session/transcript, chat/thread link, PR, branch, log, or pasted run summary. Monitor until the other agent is done or blocked, reconstruct what the user asked, independently investigate the same…
comet-verify
Comet Phase 4: Verify and Close. Invoke with /comet-verify. Verify implementation matches design, handle development branch.
new-skill
Scaffold a new brooks-lint analysis skill so it passes npm run validate and npm run evals on the first try — generates skills/{name}/SKILL.md (with the mandatory "Do NOT trigger for:" clause and a Process section citing guide step ranges) plus skills/{name}/{name}-guide.md (sequentially numbered steps), then appends…
brooks-sweep
Full-sweep mode: runs a unified analysis across all quality dimensions — code decay, architecture, tech debt, and test quality — then applies fixes directly to the codebase. Safe changes are auto-applied; risky changes are confirmed before execution. Drawing on twelve classic engineering books. Triggers when: user…
re0-merge
Review and land an external contribution the way this suite does: gate it against the thesis, land it with the author's credit intact, complete a new skill rather than merging it raw, then approve, credit, and explain before closing. Use when reviewing a pull request, as any collaborator or maintainer, not only the…