verification-oracle SKILL.md skillA
verification-oracle from metraton/gaia is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add metraton/gaia/verification-oracle@git:20261006.f5d0899Pins git:20261006.f5d0899 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- metraton/gaia
- Path
skills/verification-oracle/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261006.f5d0899, committed Oct 6, 2026
- First version recorded
- Jul 22, 2026
- Size
- 4,248 bytes
- Repository stars
- 4
- License
- MIT
Use when re-running a task_gates entry (or a proposed contract verification block) whose verification_type is `command` or `code`, to deterministically re-execute the declared check and compare the actual result against the gate's expected value -- not for `semantic` or `self_review` gates, which need judgment rather than re-execution.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Verification Oracle Deterministic re-execution of a `command` or `code` gate: run the declared check again, observe whether it passes now, and return a verdict carrying the evidence that produced it. `command` and `code` are one mechanism with two labels -- both carry a runnable string, `evidence_shape` on a persisted gate or `command` on a contract's `evidence_report.verification` -- so the label changes what a reader expects (a suite versus a linter), not how the oracle runs it. For `semantic` and `self_review` gates, use `verification-rubric`. ## Position in the flow Upstream, the planner authored the gate: its claim in `evidence_type`, its check in `evidence_shape`. Upstream of that, the executor ran the check red before its change and green after, recording both as evidence tied to the gate. The oracle never invents what to check, only whether it holds. Downstream, its verdict decides whether the task derives as done and, through the evidence it leaves, whether an AC can close -- so a false pass here counts unfinished work as done one layer up. ## Process 1. **Confirm the type.** Only `command` and `code` apply. Re-running a …
Read the whole file at its exact version.
How to install
mdr add metraton/gaia/verification-oracle@sha256:2f6328dd1c8bf792The line at the top of this page pins the label git:20261006.f5d0899, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_4ku2ixavb627bhx2)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jul 22, 2026 and Oct 6, 2026, about one every 38 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261006.f5d0899 latest | 2026-10-06 | f5d0899 | 4,248 B | A | view · diff |
| git:20260923.bbc2f09 | 2026-09-23 | bbc2f09 | 4,106 B | A | view · diff |
| git:20260722.268971e | 2026-07-22 | 268971e | 5,844 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4248 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
metraton/gaia · 4 stars · license MIT · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4ku2ixavb627bhx2 GET https://markdownregistry.com/api/v1/resolve?ref=metraton/gaia/verification-oracle GET https://markdownregistry.com/api/v1/blob/2f6328dd1c8bf792f2f1e54232abc0d1c04f3898a1682ee3dffaeff6c0e0aba8
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.