builtin-skill-format SKILL.md skillA
builtin-skill-format from noeigenstate/agentrix is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add noeigenstate/agentrix/builtin-skill-format@git:20261030.e4839ccPins git:20261030.e4839cc in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- noeigenstate/agentrix
- Path
skills/builtin-skill-format/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261030.e4839cc, committed Oct 30, 2026
- First version recorded
- Oct 29, 2026
- Size
- 3,315 bytes
- Repository stars
- 25
- License
- MIT
The strict format every built-in Agentrix skill (resources/skills/<name>/SKILL.md) must follow — fixed front matter fields and order, fixed body sections, explicit trigger timing. Use when adding or editing a built-in skill, or the code that loads, validates or delivers them.
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
# Built-in skill format Built-in skills are the system prompts Agentrix gives every Claude Code and Codex session it starts. They must be uniform so the app can validate, show and deliver them without special cases. The loader rejects a file that breaks this format, and `npm test` checks every file in `resources/skills/`. ## Front matter Exactly these keys, in this order, each on one line, no other keys, no quotes unless the value needs them: | Key | Value | | --- | --- | | `name` | kebab-case, equal to the folder name | | `description` | English, one paragraph: start with the trigger condition (`Use when …`, `Use before …`, `Use on …`, `Use at …` or `Use whenever …`), including first-open and yield-to-project conditions when applicable; then state what it does | | `trigger` | the default trigger: `always`, `auto` or `first-open` | | `when` | Chinese, one sentence: exactly when it takes effect (shown under 触发) | | `requires` | `none`, `any-agent` (Codex or Claude Code, at least one), `codex`, `claude` or `both` | | `title` | the Chinese name shown in Settings › 技能, 2–8 characters | | `summary` | Chinese, one or two sentences, at most 90 characters, what it makes agents do | …
Read the whole file at its exact version.
How to install
mdr add noeigenstate/agentrix/builtin-skill-format@sha256:ddb56bbd08a068f6The line at the top of this page pins the label git:20261030.e4839cc, 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_ij7xvykiu6fhymx7)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Oct 29, 2026 and Oct 30, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261030.e4839cc latest | 2026-10-30 | e4839cc | 3,315 B | A | view · diff |
| git:20261029.f313e5b | 2026-10-29 | f313e5b | 3,006 B | A | view · diff |
| git:20261029.be105a9 | 2026-10-29 | be105a9 | 2,751 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 (3315 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
noeigenstate/agentrix · 25 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ij7xvykiu6fhymx7 GET https://markdownregistry.com/api/v1/resolve?ref=noeigenstate/agentrix/builtin-skill-format GET https://markdownregistry.com/api/v1/blob/ddb56bbd08a068f67db0b6ef699ba3fa7fe6d9e127079f563e14da734a45ef83
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.