architect SKILL.md skillA
architect from sethgammon/citadel is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add sethgammon/citadel/architect@git:20260611.0f3f8e7Pins git:20260611.0f3f8e7 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- sethgammon/citadel
- Path
skills/architect/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260611.0f3f8e7, committed Jun 11, 2026
- First version recorded
- Mar 29, 2026
- Size
- 6,597 bytes
- Repository stars
- 929
- License
- MIT
Given a PRD, produces an implementation architecture: file tree, component breakdown, data model, and a phased build plan with end conditions that Archon can execute directly. Multi-candidate evaluation for key decisions.
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
# /architect — Implementation Architecture from PRD
## When to Use
**Don't use when:** you already have an architecture and want to implement it (use /marshal or /archon); you need a PRD first (use /prd before /architect).
- After /prd produces an approved PRD (greenfield or feature mode)
- When the user has a clear direction + existing codebase (no PRD needed)
- When /do routes a build request
- When the user has a spec and wants a build plan
## Inputs
One of:
1. A PRD file path (from /prd) — preferred, contains structured requirements
2. A user-provided spec or description + an existing codebase — sufficient
3. Neither — suggest /prd first, but don't hard-gate. If the user has a clear
direction ("add auth to my app"), that + the existing code IS the input.
## Mode Detection
**Greenfield mode**: PRD exists with `Mode: greenfield`, or no existing source files.
Produces a complete architecture from scratch.
**Feature mode**: PRD exists with `Mode: feature`, OR the user describes a feature
and the project has existing source files. The architecture describes changes to
existing code, not a standalone system.
In feature mode:
…Read the whole file at its exact version.
How to install
mdr add sethgammon/citadel/architect@sha256:009d7f5a9e1aa3f3The line at the top of this page pins the label git:20260611.0f3f8e7, 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_bth7ax5ahucinxs2)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Mar 29, 2026 and Jun 11, 2026, about one every 25 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260611.0f3f8e7 latest | 2026-06-11 | 0f3f8e7 | 6,597 B | A | view · diff |
| git:20260611.a647953 | 2026-06-11 | a647953 | 6,584 B | A | view · diff |
| git:20260503.631b94d | 2026-05-03 | 631b94d | 6,475 B | A | view · diff |
| git:20260329.6c378a2 | 2026-03-29 | 6c378a2 | 8,597 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 (6597 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
sethgammon/citadel · 929 stars · license MIT · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_bth7ax5ahucinxs2 GET https://markdownregistry.com/api/v1/resolve?ref=sethgammon/citadel/architect GET https://markdownregistry.com/api/v1/blob/009d7f5a9e1aa3f385e2877c0516c69af33ac5a71efcd5bac0554573dd602763
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.
More from sethgammon/citadel
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