dev-core SKILL.md skillA
dev-core 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-core@git:20260903.280fae3Pins git:20260903.280fae3 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-core/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260903.280fae3, committed Sep 3, 2026
- Size
- 5,028 bytes
- Repository stars
- 65
- License
- MIT
Implement the smallest runnable architectural spine after an independent RED spec, then stop before feature breadth.
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 Turn an accepted architecture and independently authored RED spec into one production-shaped vertical slice. Prove the real entry point, central ownership, and required dependency or data path without building the remaining product around them. `dev-core` is for architecture-heavy work where an early implementation decision will shape later development. Skip it for localized features, routine fixes, and mature code paths whose ownership and boundaries are already established. ## POSITION IN THE DEVELOPMENT PATH ```text arch-roadmap (family A) -> dev-spec (fresh family B) -> dev-core (family A, frontier model, xhigh or max when justified) -> pause -> dev-feature (family A at proportionate effort, or family C) ``` The family labels are relative roles, not fixed vendors. Prefer a different model family for `dev-spec` so it can challenge family A's assumptions. Model diversity reduces correlated blind spots; it does not replace requirement-derived expectations, independent oracles, or real execution. …
Read the whole file at its exact version.
How to install
mdr add lyther/agent-surface/dev-core@sha256:1b61a81208918f1eThe line at the top of this page pins the label git:20260903.280fae3, 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_7dpmg3mtticdxzn7)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 3, 2026.
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 (5028 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_7dpmg3mtticdxzn7 GET https://markdownregistry.com/api/v1/resolve?ref=lyther/agent-surface/dev-core GET https://markdownregistry.com/api/v1/blob/1b61a81208918f1e103071d5fbc5ba5ae0c22ed656252c5205a175fcade71087
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.