using-t4 SKILL.md skillA
using-t4 from xenodeve/xeno-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add xenodeve/xeno-skills/using-t4@git:20260820.0baca5ePins git:20260820.0baca5e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- xenodeve/xeno-skills
- Path
skills/t4/using-t4/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260820.0baca5e, committed Aug 20, 2026
- First version recorded
- Aug 12, 2026
- Size
- 11,208 bytes
- Repository stars
- 2
- License
- MIT
Use at the start of any task in a T4-team repo (T4 Labs / Slow-Inc) to decide which T4 skill applies — setting up the repo, session-start memory and open-work, planning or shipping a feature, or recording a bug/decision/change — and to hand off to the companion skill ecosystems the team runs alongside (superpowers, matt pocock, 9arm). The entry-point map for the t4-* skill family; consult it before acting when you're unsure which T4 discipline or which external skill a task needs. Triggers…
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
<!--
MAINTAINERS — THIS FILE IS UNDER TWO MACHINE-ENFORCED CONSTRAINTS, AND THEY PULL AGAINST EACH OTHER.
1. SIZE — NO LONGER A CEILING ON THIS FILE (#182). This file was injected verbatim on every
session start and every compaction, at 8974 B against a 9000 B cap: twenty-six bytes spare.
It is not injected any more. `hooks/t4-directive.md` is, at ~1.3 KB, and it carries the five
phrases below. This file is now LOADED by the agent when it routes, so its size costs a
session only when it is actually read. Do not re-add a ceiling here without moving the guard.
2. CONTENT. The same test requires five exact phrases to survive every edit:
`Route first` · `Red flags` · `phase boundary` · `does not discharge` · `load the current one`.
The trap is that the fix for (1) breaks (2): you pay for an overrun by trimming a sentence, and three
of those five phrases sit inside prose that reads as trimmable. The two failures look nothing alike —
one says the output is 9033 B, the other says a device is missing — so measure after trimming rather
than assuming. Run: bash tests/hooks/test-dispatcher-content.sh
…Read the whole file at its exact version.
How to install
mdr add xenodeve/xeno-skills/using-t4@sha256:c849cef492964576The line at the top of this page pins the label git:20260820.0baca5e, 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_mpjphwgt6yes2wog)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Aug 12, 2026 and Aug 20, 2026, about one every 2 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260820.0baca5e latest | 2026-08-20 | 0baca5e | 11,208 B | A | view · diff |
| git:20260819.4b2b651 | 2026-08-19 | 4b2b651 | 10,840 B | A | view · diff |
| git:20260819.4c4dbf3 | 2026-08-19 | 4c4dbf3 | 9,943 B | A | view · diff |
| git:20260812.3d97e98 | 2026-08-12 | 3d97e98 | 9,709 B | A | view · diff |
| git:20260812.5547089 | 2026-08-12 | 5547089 | 9,700 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 (11208 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
xenodeve/xeno-skills · 2 stars · license MIT · pushed 2026-10-12 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_mpjphwgt6yes2wog GET https://markdownregistry.com/api/v1/resolve?ref=xenodeve/xeno-skills/using-t4 GET https://markdownregistry.com/api/v1/blob/c849cef492964576a07927e89f02168cd5fb81f0123b459f3100264113e05b5f
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.