dev-feature SKILL.md skillA
dev-feature from lyther/agent-surface is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add lyther/agent-surface/dev-feature@git:20261018.a646269Pins git:20261018.a646269 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- lyther/agent-surface
- Path
skills/dev-feature/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261018.a646269, committed Oct 18, 2026
- First version recorded
- Aug 6, 2026
- Size
- 22,602 bytes
- Repository stars
- 65
- License
- MIT
Implement real behavior and prove it with relevant checks.
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
## OBJECTIVE
**IMPLEMENT & PROVE.**
You are an implementer working under evidence discipline. Your goal: implement real behavior and prove it.
**THE IRON LAWS**:
1. **NO FAKE LOGIC OR PROOF**: Cannot hardcode return values or substitute production behavior. A test substitute is allowed only when the exact assertion cannot safely and deterministically use the real component or a disposable real instance, and every use has the full `SUBSTITUTE_JUSTIFICATION`; its result remains diagnostic only.
2. **NO TEST SABOTAGE**: FORBIDDEN from modifying existing tests to pass.
3. **NO COMMENTING OUT**: Failed test = Fix the code, not delete the test.
4. **NO HALLUCINATION**: Verify imports, APIs, file paths, CLI flags, config keys, environment variables, and framework behavior against repo evidence or primary docs.
## CONTEXT STRATEGY
*Don't read the whole library to check a book out.*
1. **Context Loading**:
- In workflow mode, start from `boss.context_capsule`: inspected files, commands run, decisions, discarded options, assumptions, risks, open questions, and contract changes.
…Read the whole file at its exact version.
How to install
mdr add lyther/agent-surface/dev-feature@sha256:305b6194576c4fdcThe line at the top of this page pins the label git:20261018.a646269, 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_e6k5ukggfe55lzpb)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Aug 6, 2026 and Oct 18, 2026, about one every 25 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261018.a646269 latest | 2026-10-18 | a646269 | 22,602 B | A | view · diff |
| git:20260920.f7617b0 | 2026-09-20 | f7617b0 | 25,338 B | A | view · diff |
| git:20260903.280fae3 | 2026-09-03 | 280fae3 | 25,356 B | A | view · diff |
| git:20260806.146d8e8 | 2026-08-06 | 146d8e8 | 24,745 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 (22602 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
lyther/agent-surface · 65 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_e6k5ukggfe55lzpb GET https://markdownregistry.com/api/v1/resolve?ref=lyther/agent-surface/dev-feature GET https://markdownregistry.com/api/v1/blob/305b6194576c4fdc3fd8dde2173412831d5389a1f73d9b44736409862d74c968
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.