principle-sequence-verifiable-units SKILL.md skillA

principle-sequence-verifiable-units from edbertchan/catstack is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add edbertchan/catstack/principle-sequence-verifiable-units@git:20260910.57b918f

Pins git:20260910.57b918f in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
edbertchan/catstack
Path
corpus/skills/principle-sequence-verifiable-units/SKILL.md
Versions recorded
2
Latest version
git:20260910.57b918f, committed Sep 10, 2026
First version recorded
Aug 25, 2026
Size
3,774 bytes
Repository stars
6
License
none declared

Apply to multi-step work (sweeps, migrations, runs of similar edits) and to how you stack commits and PRs. Break work into small units that each end in a verifiable state, check each before the next, and order delivery so the sequence proves itself to a reviewer.

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

# Sequence work into verifiable units

Order work as a sequence of small units, each ending in a state you can check, and don't advance until the current one is green. The same discipline runs at two altitudes, how you execute and how you deliver.

**Why:** A break caught at the unit that caused it is cheap to localize. A break caught after a batch is buried, and you have already built further on a broken base. Sequencing those same units into a delivery a reviewer can replay turns "trust me" into "watch it go red, then green."

**Execution.** In a sweep, migration, or any run of similar edits, verify each change before starting the next. Never batch the edits and verify once at the end. Each unit is a before/after bracket: known-good state, one change, run the check, then proceed. Rebase onto clean trunk first so every check measures against the real baseline. When a lever does the edits, the per-unit check is nearly free; run it anyway.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add edbertchan/catstack/principle-sequence-verifiable-units@sha256:538da180578a3021

The line at the top of this page pins the label git:20260910.57b918f, 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_xczsc56ivqujy73n.svg)](https://markdownregistry.com/a/art_xczsc56ivqujy73n)

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

Versions

The registry has recorded 2 versions of this file, between Aug 25, 2026 and Sep 10, 2026, about one every 17 days.

versioncommittedcommitsizeaudit
git:20260910.57b918f latest2026-09-10 57b918f 3,774 BA view · diff
git:20260825.847374d2026-08-25 847374d 3,373 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 (3774 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

edbertchan/catstack · 6 stars · license none declared · pushed 2026-10-22 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_xczsc56ivqujy73n
GET https://markdownregistry.com/api/v1/resolve?ref=edbertchan/catstack/principle-sequence-verifiable-units
GET https://markdownregistry.com/api/v1/blob/538da180578a3021bfd43651c8920a1ec973f38806f8b7f1546910ecd79132a9

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.

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Every file in edbertchan/catstack

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