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impeccable SKILL.md skillA

impeccable from tibursocampos/agent-dev-toolkit is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add tibursocampos/agent-dev-toolkit/impeccable@git:20260812.5bb1935

Pins git:20260812.5bb1935 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: tibursocampos/agent-dev-toolkit
Path: scripts/validation/fixtures/antigravity-install-root/config/skills/impeccable/SKILL.md
Versions recorded: 2
Latest version: git:20260812.5bb1935, committed Aug 12, 2026
First version recorded: Jul 31, 2026
Size: 9,409 bytes
Repository stars: 6
License: MIT

Design, shape, critique, audit, and polish frontend UI; writes docs/DESIGN-BRIEF.md for stack handoff. Use for UI/UX design work or when invoking /impeccable.

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

## STOP - Read before ANY tool call

1. Read `{{GUARDRAILS_PATH}}`
2. Read `_shared/sdd-artifacts/SESSION.md`; load session-state for `$Cwd`
3. If the relevant gate is not approved: **STOP** - ask user **(pt-BR)** - do **NOT** Write/Shell
4. SDD/develop skills: after **ONE** step/task, **STOP** session - handoff only
5. This skill body is **English**; user-facing prompts may be **(pt-BR)**

### Step -1 - Gate check (report in chat before continuing)

```
Gate check:
[ ] guardrails.mdc read
[ ] SESSION.md read; session-state loaded
[ ] User confirmed current action (sim)
-> If any unchecked: STOP
```

---

Inspired by [pbakaus/impeccable](https://github.com/pbakaus/impeccable) — this skill is a **partial toolkit harness**, not a full port. See `docs/CREDITS.md`.

## Trigger

Use when user asks for `/impeccable`, `/impeccable`, or any Impeccable command (`shape`, `audit`, `polish`, `craft`, etc.).

**Invocation forms:**

| User says | Behavior |
|-----------|----------|
| `/impeccable` | Context-aware menu; no auto-run |
| `/impeccable <command> [target]` | Load `reference/<command>.md` and execute |
| `/impeccable-shape` | Alias: `shape` command |
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add tibursocampos/agent-dev-toolkit/impeccable@sha256:95a6e49479e8ca06

The line at the top of this page pins the label git:20260812.5bb1935, 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](https://markdownregistry.com/badge/art_5tayxp7rp27yryto.svg)](https://markdownregistry.com/a/art_5tayxp7rp27yryto)

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

Versions

The registry has recorded 2 versions of this file, between Jul 31, 2026 and Aug 12, 2026, about one every 12 days.

version	committed	commit	size	audit
git:20260812.5bb1935 latest	2026-08-12	5bb1935	9,409 B	A	view · diff
git:20260731.8534eac	2026-07-31	8534eac	8,452 B	A	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 (9409 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

tibursocampos/agent-dev-toolkit · 6 stars · license MIT · pushed 2026-10-21 · branch master

API

GET https://markdownregistry.com/api/v1/artifacts/art_5tayxp7rp27yryto
GET https://markdownregistry.com/api/v1/resolve?ref=tibursocampos/agent-dev-toolkit/impeccable
GET https://markdownregistry.com/api/v1/blob/95a6e49479e8ca068c85c0e844e2627ce29ed6814e3ccf1ccb2ca1c1550c2e25

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.