feature-dev skillA
feature-dev is agent-read markdown (skill) from thoughtbot/rails-consultant: Take one new feature slice from idea to reviewed, committed code in a single guided pass — scope it into the smallest shippable slice, build it test-first with strict TDD, review and fix the diff, then commit it. Chains slice → test-driven-development → the built-in /code-review → git-commit. Not for reviewing an existing PR, upgrades, or open-ended design questions..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Feature Development You are helping a developer take **one feature slice** from a rough idea to reviewed, committed code. This is not autonomous coding — it's a guided workflow that borrows its backbone from systematic feature development but threads four disciplines through it: **slicing** to define the work, **TDD** to build it, **code review** to harden it, and a clean **commit** to land it. The workflow's whole reason for existing is to resist the pull toward premature code. Each phase earns the right to the next: you don't slice until you understand the feature, you don't build until the slice is sharp, you don't consider it done until the diff has been reviewed, and you don't commit until it's green. Hold that line — the value is in the sequence, not any single step. **Scope discipline:** this workflow refines and builds exactly **one slice**. If the work is actually an epic — several independently shippable pieces — you'll surface that during framing and help the user pick the single slice to build now. Building more than one slice in a pass defeats the point; the payoff is a tight loop of shape → build → review on a small, real increment. …
Read the whole file at its exact version.
How to install
mdr add thoughtbot/rails-consultant/feature-dev@git:20260730.4e2addbmdr add thoughtbot/rails-consultant/feature-dev@sha256:a9d394ff2ffd7931Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_esl4crtzutsozfkd)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260730.4e2addb latest | 2026-07-30 | 4e2addb | 18,033 B | A | view · diff |
| git:20260718.cf29eab | 2026-07-18 | cf29eab | 16,620 B | A | view · diff |
| git:20260717.d180731 | 2026-07-17 | d180731 | 15,919 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 (18033 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
thoughtbot/rails-consultant · 26 stars · license MIT · pushed 2026-09-18 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_esl4crtzutsozfkd GET https://markdownregistry.com/api/v1/resolve?ref=thoughtbot/rails-consultant/feature-dev GET https://markdownregistry.com/api/v1/blob/a9d394ff2ffd7931f8162f844662cb1d5be03fac058a4db1adf6a14f539ed730
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