skill-optimizer SKILL.md skillA
skill-optimizer from garrytan/gbrain is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add garrytan/gbrain/skill-optimizer@v0.1.0Pins v0.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- garrytan/gbrain
- Path
skills/skill-optimizer/SKILL.md- Versions recorded
- 5
- Latest version
- v0.1.0, committed Oct 7, 2026
- First version recorded
- May 31, 2026
- Size
- 10,480 bytes
- Repository stars
- 31,074
- License
- MIT
Self-evolving skill optimization via SkillOpt-paper-grounded text-space optimizer.
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
# Skill Optimizer Self-evolving skill optimization. Treats SKILL.md as the trainable parameters of a frozen agent. Validation-gated, budget-capped, atomic-versioned. Based on SkillOpt (arXiv 2605.23904, Microsoft Research, May 2026). ## When to invoke this skill The user wants to: - Improve an existing skill's execution quality against a benchmark - Bootstrap a benchmark file for a new skill - Re-tune a skill after switching target models ## Iron Law - **Validation gating is MANDATORY.** Every candidate must clear median-of-3 + epsilon=0.05 margin against the sel-set before SKILL.md gets rewritten. - **Frontmatter mutation is FORBIDDEN.** The optimizer only edits the body. Routing surface (`triggers:`, `brain_first:`) stays invariant. - **Bundled skills require explicit opt-in AND an independent held-out set.** Skills shipping with gbrain cannot be auto-mutated. To rewrite one in place the user passes BOTH `--allow-mutate-bundled` AND `--held-out <path>` with at least 5 benchmark-disjoint tasks; without the held-out set the run hard-refuses (exit 2). Drop `--allow-mutate-bundled` (or pass `--no-mutate`, …
Read the whole file at its exact version.
How to install
mdr add garrytan/gbrain/skill-optimizer@sha256:1dea9a5257a60fb2The line at the top of this page pins the label v0.1.0, 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_pnpoj3szwmucjo3m)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between May 31, 2026 and Oct 7, 2026, about one every 32 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.1.0 latest | 2026-10-07 | 590bb9a | 10,480 B | A | view · diff |
| v0.1.0 | 2026-10-04 | 739e5cc | 10,479 B | A | view · diff |
| v0.1.0 | 2026-08-16 | df4feda | 9,783 B | A | view · diff |
| v0.1.0 | 2026-06-03 | d4211f4 | 8,999 B | A | view · diff |
| v0.1.0 | 2026-05-31 | eefe8b5 | 8,082 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 (10480 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
garrytan/gbrain · 31,074 stars · license MIT · pushed 2026-10-22 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_pnpoj3szwmucjo3m GET https://markdownregistry.com/api/v1/resolve?ref=garrytan/gbrain/skill-optimizer GET https://markdownregistry.com/api/v1/blob/1dea9a5257a60fb29a4c7701c92bce428025fb2321e950533f1367edfca1b8b0
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.