testdouble/han · han-planning/skills/plan-a-feature/SKILL.md

plan-a-feature skillA

plan-a-feature is agent-read markdown (skill) from testdouble/han: Builds a feature specification from scratch through a relentless, evidence-based interview that walks the design tree decision-by-decision, resolving dependencies as it goes. Use when the user wants to plan, design, scope, specify, or flesh out a new feature, capability, or system behavior before implementation. Produces a feature specification focused on system behaviors, not implementation detail. Does not plan a restructure of code that already exists — use plan-a-change. Does not refine or s.

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.

How to install

Latest version
mdr add testdouble/han/plan-a-feature@git:20260915.ec2cb7c
Exact content
mdr add testdouble/han/plan-a-feature@sha256:01216f311bab9a7e

Pin 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_qhjppvfnfhiz6h47.svg)](https://markdownregistry.com/a/art_qhjppvfnfhiz6h47)

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Versions

versioncommittedcommitsizeaudit
git:20260915.ec2cb7c latest2026-09-15 ec2cb7c 36,430 BA view · diff
git:20260909.dde8d4a2026-09-09 dde8d4a 36,357 BA view · diff
git:20260909.f586d002026-09-09 f586d00 35,292 BA view · diff
git:20260908.1dc72b12026-09-08 1dc72b1 35,213 BA view · diff
git:20260819.cdb751e2026-08-19 cdb751e 36,703 BA view · diff
git:20260818.55bdb1d2026-08-18 55bdb1d 36,722 BA view · diff
git:20260807.92de3612026-08-07 92de361 36,608 BA view · diff
git:20260803.1cda9cd2026-08-03 1cda9cd 36,537 BA view · diff
git:20260731.e79299f2026-07-31 e79299f 36,565 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (36430 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

GitHub

testdouble/han · 267 stars · license MIT · pushed 2026-09-15 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_qhjppvfnfhiz6h47
GET https://markdownregistry.com/api/v1/resolve?ref=testdouble/han/plan-a-feature
GET https://markdownregistry.com/api/v1/blob/01216f311bab9a7e531288410de0474ba175481d6a210f8070d7f6e7798d8fb8