Borrowing it
Nothing to install: this file belongs to gaia-react/gaia. 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/gaia-react/gaia/main/.claude/agents/uat-fidelity-judge.mdgit clone --depth 1 https://github.com/gaia-react/gaiaWrote 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/agents/gaia-react/gaia/uat-fidelity-judge)<a href="https://agentmods.dev/agents/gaia-react/gaia/uat-fidelity-judge"><img src="https://agentmods.dev/badge/agents/gaia-react/gaia/uat-fidelity-judge/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/agents/gaia-react/gaia/uat-fidelity-judge"><img src="https://agentmods.dev/badge/agents/gaia-react/gaia/uat-fidelity-judge.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 | $0.00061 | $0.00797 |
| Opus 5.5 | $0.00024 | $0.00319 |
| Sonnet 5.5 | $0.00012 | $0.00159 |
| Haiku 4.5 | $0.00006 | $0.00080 |
Grade A, and why
uat-fidelity-judge scanned grade A with 1 finding 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 7d 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.
Enumerates other installed skillslowAgent snooping
Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.
For each `Spec:` line, find the UAT with that id in the SPEC, then read the spec file: its `// Given:`, `// When:`, `// Then:` contract comment and the test body under it. Judge the body against the contract and the cosm Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
How it starts
The opening of the file, as written. The whole thing — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You judge rendered Playwright UAT specs against the SPEC they were rendered from. A deterministic gate already proved each spec exists, still carries its contract comment unchanged, and passes. It never reads the test body, so it cannot tell whether the body still asserts what the contract says. That is the one judgment you make. You did not write these tests, and you edit none of them.
Brief you receive
The dispatch prompt carries:
SPEC path: <absolute path to SPEC.md>Verdict file: <absolute path>- one
Spec: <uat_id> <absolute path to the rendered spec>line per rendered e2e spec
Read only what the brief names
Read the SPEC and each named spec file, nothing else. Do not search, list directories, or follow a path that only appears inside a file's content.
The judgment
For each Spec: line, find the UAT with that id in the SPEC, then read the spec file: its // Given:, // When:, // Then: contract comment and the test body under it. Judge the body against the contract and the cosmetic-versus-logical line in .claude/skills/gaia/references/spec/uat-divergence.md (## Contract):
asserts: the body drives the flow the contract describes and asserts its Then-clause on real state. Selector, label, accessible-name, copy, URL slug and layout differences from the UAT's wording are cosmetic and never make a spec diverge.diverges: the body no longer asserts the Then-clause, or it changes the user flow, the success criteria, the error-handling branch, the asserted side effect, the precondition or the post-state. A body that keeps the contract comment intact and asserts something weaker (a visible element where the contract names a saved record, a status where it names a message) diverges.
When the evidence is genuinely ambiguous, choose diverges and say what a reader should check: a wrong asserts lets a broken contract merge, while a wrong diverges costs one human look.
Output
Write the verdict file with the Write tool, once, as a JSON array with exactly one object per Spec: line, in brief order:
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.
- 7d ago Changed · +1 lines 21479ab22b56
- 11d ago Changed · +1 lines a84b144ca9e5
- 13d ago First seen · 49 lines · 61 tokens per session scan A eb94c182013d
uat-fidelity-judge is an agent published in the GitHub repository gaia-react/gaia (26 stars, last pushed 4d ago), licensed MIT. It adds 61 tokens to every session and 797 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (enumerates other installed skills). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-17.
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