diu SKILL.md skillA
diu from edbertchan/catstack is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add edbertchan/catstack/diu@git:20261022.f578536Pins git:20261022.f578536 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- edbertchan/catstack
- Path
product/skills/diu/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261022.f578536, committed Oct 22, 2026
- First version recorded
- Aug 25, 2026
- Size
- 11,459 bytes
- Repository stars
- 6
- License
- none declared
Default communication rule, two parts. (1) Brevity: before finishing any response, check whether it would run over roughly 150 words or lean on unexplained jargon. If so, and the user has not explicitly asked for full technical detail in the same turn, replace it with an ELI5 answer under 40 words instead. Also triggers immediately on a literal ELI5 request in the user's message (eli5, ELI5, Eli5, "ELI 5" with a space, or an explicit word cap like "< 40 words"), even with no other context.…
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
# diu ## Why this exists Calibrated from ~24 real "eli5" requests mined from Claude Code and Codex CLI session history: the user asks for "eli5" constantly, almost always proactively in the same message as the question rather than as a follow-up complaint after a bad answer, most often on root-cause "why is this broken" debugging questions, architecture explanations, and PR summaries. The shape rules below were originally a separate opt-in skill (`i-have-adhd`, toggled on with `/i-have-adhd` and off with "stop adhd mode"). Mining showed the same underlying need shows up constantly without the toggle ever being invoked — buried answers, preamble, un-numbered multi-step instructions — so the structural half of that skill is now part of diu's default, always-on behavior instead of something to remember to turn on. ## Part 1: brevity trigger 1. Before sending a response, estimate its length and jargon density. 2. If it would exceed 150 words, or uses terms the user hasn't already used and hasn't asked to have explained at that depth, stop and rewrite it as ELI5: under 40 words, plain everyday language, lead with the outcome, no unexplained acronyms or jargon. …
Read the whole file at its exact version.
How to install
mdr add edbertchan/catstack/diu@sha256:8cc8d605762c4bc7The line at the top of this page pins the label git:20261022.f578536, 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.
[](https://markdownregistry.com/a/art_4favajsmeqrnydo4)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Aug 25, 2026 and Oct 22, 2026, about one every 29 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261022.f578536 latest | 2026-10-22 | f578536 | 11,459 B | A | view · diff |
| git:20260925.3b0c4d9 | 2026-09-25 | 3b0c4d9 | 9,691 B | A | view · diff |
| git:20260825.847374d | 2026-08-25 | 847374d | 8,936 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 (11459 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
edbertchan/catstack · 6 stars · license none declared · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4favajsmeqrnydo4 GET https://markdownregistry.com/api/v1/resolve?ref=edbertchan/catstack/diu GET https://markdownregistry.com/api/v1/blob/8cc8d605762c4bc7b26aed776da87c9989b08714cec342c5d3cb1236b1280407
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.