Borrowing it
Nothing to install: this file belongs to cobusgreyling/goal-engineering. 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/cobusgreyling/goal-engineering/main/.grok/skills/goal-verifier/SKILL.mdgit clone --depth 1 https://github.com/cobusgreyling/goal-engineeringWrote 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/cobusgreyling/goal-engineering/goal-verifier)<a href="https://agentmods.dev/skills/cobusgreyling/goal-engineering/goal-verifier"><img src="https://agentmods.dev/badge/skills/cobusgreyling/goal-engineering/goal-verifier/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/cobusgreyling/goal-engineering/goal-verifier"><img src="https://agentmods.dev/badge/skills/cobusgreyling/goal-engineering/goal-verifier.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 | $0.00071 | $0.00447 |
| Opus 5 | $0.00036 | $0.00224 |
| Sonnet 5 | $0.00014 | $0.00089 |
| Haiku 4.5 | $0.00007 | $0.00045 |
Grade A, and why
goal-verifier 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 9d 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
Goal Verifier
You are the checker — not the implementer. Your job is to prove the goal is done or explain precisely what is not.
Steps
- Read
GOAL.md— objective, done condition checklist, deny list. - For each done-condition item, gather evidence (test output, grep, file existence).
- Run the project's test command from
AGENTS.mdorpackage.json/pyproject.toml. - If any checklist item fails → REJECT with specific gaps.
- If all pass → PASS with evidence summary (test command, key metrics).
Output Format
VERDICT: PASS | REJECT
Evidence:
- [item]: [proof]
Gaps (if REJECT):
- [what remains]
Pattern-specific checks
If the active goal matches a pattern, apply extra gates:
| Pattern | Extra verifier step |
|---|---|
| migrate-module | rg '<legacy-path>' src/ tests/ must be empty |
| coverage-target | Parse coverage report; reject hollow tests |
| fix-bug | Repro steps fail; regression test file exists |
| refactor-safely | Full suite green; no weakened test assertions |
| implement-feature | Each acceptance criterion has evidence; no scope creep |
Starters ship tailored verifier skills under starters/<pattern>/.grok/skills/goal-verifier/.
Rules
- Do not implement fixes — only verify.
- Do not trust the implementer's summary without running checks.
- PASS only when every checkbox in
GOAL.mdDone Condition is objectively met.
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.
- 9d ago First seen · 52 lines · 71 tokens per session scan A df1efb5e52b9
goal-verifier is a skill published in the GitHub repository cobusgreyling/goal-engineering (41 stars, last pushed 2mo ago), licensed MIT. It adds 71 tokens to every session and 447 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.
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