lesson-record SKILL.md skillA
lesson-record from yarlson/yarstack is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add yarlson/yarstack/lesson-record@git:20261104.08c2224Pins git:20261104.08c2224 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- yarlson/yarstack
- Path
plugins/yarbrain/skills/lesson-record/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261104.08c2224, committed Nov 4, 2026
- First version recorded
- Nov 3, 2026
- Size
- 5,710 bytes
- Repository stars
- 3
- License
- MIT
Record reusable know-how from this session as a proposed Yarbrain lesson, report whether a used lesson worked, convert legacy v0.2 notes, and start the independent lesson gate. Use when the user corrects you or says "remember this", when the session found a working step order, a trap with a misleading error, or an unstated project rule, after you apply or disprove a Yarbrain lesson, when the yarbrain hook reports lessons that await the gate or legacy notes that await conversion, or when the…
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
# Record a Yarbrain Lesson Turn what this session learned into a small lesson that a future agent can apply without this conversation. You propose; an independent gate agent decides. You never judge your own lesson. ## Before anything Run `yarbrain status`. Act on the result: - Command not found: run this plugin's launcher by its path. It is `bin/yarbrain` two folders above this skill's folder. Use that path in place of `yarbrain` in every command of this session. - `no_vault`: ask the person once where the vault should live, then run `yarbrain init <path>`. Apply only the setup steps whose `host` is the host you run in: `claude-code` or `codex`. Edit exactly the file that the step names, never a project file, and tell the person what you changed. The host may ask them to approve each edit; if they decline one, or the edit fails, tell them the step and continue. - Any other error: follow its `fix` field. Exit code 4 means retry once; the first call exits 4 after it downloads the yarbrain CLI that this plugin pins. ## What qualifies Propose a lesson only when all of these hold: - A later session in this project, or in any project, would act differently …
Read the whole file at its exact version.
How to install
mdr add yarlson/yarstack/lesson-record@sha256:904d5fdd61445584The line at the top of this page pins the label git:20261104.08c2224, 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_i6vbegmbrvf7x5vo)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Nov 3, 2026 and Nov 4, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261104.08c2224 latest | 2026-11-04 | 08c2224 | 5,710 B | A | view · diff |
| git:20261103.54519f7 | 2026-11-03 | 54519f7 | 5,366 B | A | view · diff |
| git:20261103.563161d | 2026-11-03 | 563161d | 5,348 B | A | view · diff |
| git:20261103.0333fb7 | 2026-11-03 | 0333fb7 | 5,125 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 (5710 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
yarlson/yarstack · 3 stars · license MIT · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_i6vbegmbrvf7x5vo GET https://markdownregistry.com/api/v1/resolve?ref=yarlson/yarstack/lesson-record GET https://markdownregistry.com/api/v1/blob/904d5fdd6144558424383f772249c1ca36c7ddd105195238146af1db23090092
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.