close-spec SKILL.md skillA

This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.

close-spec from dzhng/duet-agent is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add dzhng/duet-agent/close-spec@git:20260721.6692189

Pins git:20260721.6692189 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
dzhng/duet-agent
Path
.agents/skills/close-spec/SKILL.md
Versions recorded
2
Latest version
git:20260721.6692189, committed Jul 21, 2026
First version recorded
Jul 17, 2026
Size
6,512 bytes
Repository stars
50
License
Apache-2.0

When a spec under specs/<feature>/ is done shipping (a write-spec build, or any planned task that produced a spec), archive it to specs/done/ and rewrite it from a build-plan into a durable rationale — the why, the principles, the invariants — pointing back to the real code for the how. Use when implementation has landed and the plan no longer matches what shipped, or the user says a feature/spec is finished. Pairs with [write-spec](../write-spec/SKILL.md) (the plan this closes) and…

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

# Close Spec

A spec is a **build plan** while you're building and a **rationale record**
once you've shipped. Closing flips it from one to the other. The plan was a
ladder of slices and predictions; the record is the layer of meaning the code
can't hold — why this exists, what it must never break, what you tried that
failed. The code is the single source of truth for *how*; the closed spec is
the source of truth for *why*, and a map into the code.

Do not summarize the implementation. Anyone can read the code. If a paragraph
restates what a function does, cut it and point at the function instead.

## Workflow

1. **Confirm it shipped.** The feature is merged or working in-tree and its
   tests/screenshot gates are green. If slices remain unverified, it isn't
   done — finish or [review](../review/SKILL.md) first.

2. **Diff plan against reality.** Read the spec's README and slices, then read
   what actually landed. Note every place the build diverged from the plan:
   dropped slices, renamed seams, a mechanic that turned out different, an
   assumption that broke. The divergences are the most valuable thing to
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add dzhng/duet-agent/close-spec@sha256:1037876ce3e240ac

The line at the top of this page pins the label git:20260721.6692189, 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_fyowji4lzrkjkzbt.svg)](https://markdownregistry.com/a/art_fyowji4lzrkjkzbt)

4 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 2 versions of this file, between Jul 17, 2026 and Jul 21, 2026, about one every 4 days.

versioncommittedcommitsizeaudit
git:20260721.6692189 latest2026-07-21 6692189 6,512 BA view · diff
git:20260717.934babf2026-07-17 934babf 6,436 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the 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 (6512 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

dzhng/duet-agent · 50 stars · license Apache-2.0 · pushed 2026-10-21 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_fyowji4lzrkjkzbt
GET https://markdownregistry.com/api/v1/resolve?ref=dzhng/duet-agent/close-spec
GET https://markdownregistry.com/api/v1/blob/1037876ce3e240ace93e6632587d21c2edf31b36e43cf12e11663a1157147aa8

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 dzhng/duet-agent

audit-agents SKILL.md skill
dzhng/duet-agent · .agents/skills/audit-agents/SKILL.md · Audit or rewrite AGENTS.md so it holds only lasting principles. Run it only when the user asks for it by name; never…
git:20261002.bbef714 · audit A · 50 stars
audit-choices SKILL.md skill
dzhng/duet-agent · .agents/skills/audit-choices/SKILL.md · Audit the choices an implementing agent made, not its diff — a pure decision audit that traces the session's history…
git:20260813.f2a4f7b · audit A · 50 stars
audit-tests SKILL.md skill
dzhng/duet-agent · .agents/skills/audit-tests/SKILL.md · Audit whether tests earn their maintenance cost and which suite owns each contract. Use when pruning redundant tests…
git:20261002.7680dea · audit A · 50 stars
claude SKILL.md skill
dzhng/duet-agent · .agents/skills/claude/SKILL.md · Use Claude Code as an independent `claude -p` subagent when the user explicitly asks for Claude, wants a second-agent…
git:20261015.0e6cd08 · audit A · 50 stars
code-review SKILL.md skill
dzhng/duet-agent · .agents/skills/code-review/SKILL.md · Review changed code for naming, stale references, unnecessary complexity, and comment quality. Use after completing…
git:20261021.e955131 · audit A · 50 stars
codex SKILL.md skill
dzhng/duet-agent · .agents/skills/codex/SKILL.md · Use the local Codex CLI as an independent second agent. Two branches — (1) proactively run `codex review` for a second…
git:20261020.37d28d9 · audit A · 50 stars
compare-screenshots SKILL.md skill
dzhng/duet-agent · .agents/skills/compare-screenshots/SKILL.md · Compare screenshots against the intended design, distinguishing approved references from historical baselines. Use for…
git:20261014.dcaa49d · audit A · 50 stars
debug-memory SKILL.md skill
dzhng/duet-agent · .agents/skills/debug-memory/SKILL.md · Reproduce observational-memory bugs (reflection, recall, observer, freshness, eviction) by dumping the live…
git:20260525.773900d · audit A · 50 stars
design-with-images SKILL.md skill
dzhng/duet-agent · .agents/skills/design-with-images/SKILL.md · Explore UI and visual design with image generation, then iterate the real implementation against the user-selected…
git:20261002.7680dea · audit A · 50 stars
eli5 SKILL.md skill
dzhng/duet-agent · .agents/skills/eli5/SKILL.md · Explain a technical spec or proposed change in plain language: what problem it solves, how the solution works, and…
git:20260813.f2a4f7b · audit A · 50 stars
eval-skills SKILL.md skill
dzhng/duet-agent · .agents/skills/eval-skills/SKILL.md · Eval and improve a skill against golden cases — run the target skill blind in a fresh, context-free subagent on each…
git:20260717.934babf · audit A · 50 stars
explore-unknowns SKILL.md skill
dzhng/duet-agent · .agents/skills/explore-unknowns/SKILL.md · Guide the user through a quadrant walk that maps the unknowns of a task — open by listing the known knowns, then work…
git:20261002.7578047 · audit A · 50 stars

Every file in dzhng/duet-agent

Other files named close-spec

close-spec SKILL.md skill
dzhng/skills · skills/engineering/close-spec/SKILL.md · When a spec under specs/<feature>/ is done shipping (a write-spec build, or any planned task that produced a spec)…
git:20260721.2ee48ec · audit A · 1,377 stars

Browse by kind, by grade A, or by owner.