discover-acs SKILL.md skillA
discover-acs from swingerman/engineer is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add swingerman/engineer/discover-acs@git:20261020.53d8135Pins git:20261020.53d8135 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- swingerman/engineer
- Path
engineer/skills/discover-acs/SKILL.md- Versions recorded
- 6
- Latest version
- git:20261020.53d8135, committed Oct 20, 2026
- First version recorded
- May 20, 2026
- Size
- 9,120 bytes
- Repository stars
- 162
- License
- MIT
Use when a Ready feature needs its acceptance criteria discovered before specs are written. Triggers — "/engineer.discover-acs", "/engineer.acceptance-criteria", "discover ACs", "what must this feature do", "figure out acceptance criteria".
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
# discover-acs Discover a feature's acceptance criteria — Checkpoint 2. ACs are **decisions about what behaviors must work**, in **domain language**. They precede the Given/When/Then formalization that `atdd:atdd` produces. Separating AC discovery (divergent decisions) from spec formalization (convergent encoding) is what protects domain language from leaking into implementation language. ## When to use On a feature with `autonomy_level` set and `status` of `ready` (greenfield) or `in-progress`/`done` (onboarded existing work). Produces `acs.md`. **Two modes:** - **Greenfield** — `status: ready`, no existing spec. Discover ACs from scratch via the four-pass interview. - **Reverse-engineer** — onboarded feature (`in-progress`/`done`) that already has a spec (a Speckit `spec.md`, a design doc, shipped code). Extract candidate ACs from the existing material, then interview only for the gaps it leaves. **Not for:** a parked feature (`discuss` to promote first); a feature that already has a complete `acs.md` (`feature-edit`); producing Given/When/Then specs (`atdd:atdd`); deciding whether to build the feature (`discuss`). ## Workflow …
Read the whole file at its exact version.
How to install
mdr add swingerman/engineer/discover-acs@sha256:8d259f624b575270The line at the top of this page pins the label git:20261020.53d8135, 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_d55rliuhy6x6w7zb)
8 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between May 20, 2026 and Oct 20, 2026, about one every 31 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261020.53d8135 latest | 2026-10-20 | 53d8135 | 9,120 B | A | view · diff |
| git:20260823.7f6ca14 | 2026-08-23 | 7f6ca14 | 9,011 B | A | view · diff |
| git:20260729.715119e | 2026-07-29 | 715119e | 8,295 B | A | view · diff |
| git:20260604.4191d6a | 2026-06-04 | 4191d6a | 7,482 B | A | view · diff |
| git:20260528.0c6f513 | 2026-05-28 | 0c6f513 | 6,222 B | A | view · diff |
| git:20260520.cd41431 | 2026-05-20 | cd41431 | 5,846 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 (9120 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
swingerman/engineer · 162 stars · license MIT · pushed 2026-10-27 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_d55rliuhy6x6w7zb GET https://markdownregistry.com/api/v1/resolve?ref=swingerman/engineer/discover-acs GET https://markdownregistry.com/api/v1/blob/8d259f624b5752701f101d629e44dc01199a113014a12c5a6642a4960139d6eb
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.