creating-skills SKILL.md skillA
creating-skills from letta-ai/letta-code is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add letta-ai/letta-code/creating-skills@git:20261030.9d1220bPins git:20261030.9d1220b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- letta-ai/letta-code
- Path
src/skills/builtin/creating-skills/SKILL.md- Versions recorded
- 6
- Latest version
- git:20261030.9d1220b, committed Oct 30, 2026
- First version recorded
- Dec 22, 2025
- Size
- 21,307 bytes
- Repository stars
- 3,759
- License
- Apache-2.0
Guide for creating effective skills. Use when creating a new skill or updating an existing one that extends Letta Code's capabilities with specialized knowledge, workflows, or tool integrations, whether a user asks for it or a reusable workflow is worth capturing.
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
# Creating Skills This skill provides guidance for creating effective skills in Letta Code. For the complete official specification, see [agentskills.io](https://agentskills.io/specification). ## About Skills Skills are modular, self-contained packages that extend Letta Code's capabilities by providing specialized knowledge, workflows, and tools. Think of them as "onboarding guides" for specific domains or tasks—they transform a Letta Code agent from a general-purpose agent into a specialized agent equipped with procedural knowledge that no model can fully possess. ### What Skills Provide 1. Specialized workflows - Multi-step procedures for specific domains 2. Tool integrations - Instructions for working with specific file formats or APIs 3. Domain expertise - Company-specific knowledge, schemas, business logic 4. Bundled resources - Scripts, references, and assets for complex and repetitive tasks ## Core Principles ### Concise is Key The context window is a public good. Skills share the context window with everything else the Letta Code agent needs: system prompt, conversation history, other Skills' metadata, and the actual user request. …
Read the whole file at its exact version.
How to install
mdr add letta-ai/letta-code/creating-skills@sha256:db83ee9bb4794664The line at the top of this page pins the label git:20261030.9d1220b, 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_53fdjans2cpkomkh)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between Dec 22, 2025 and Oct 30, 2026, about one every 62 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261030.9d1220b latest | 2026-10-30 | 9d1220b | 21,307 B | A | view · diff |
| git:20261018.ded135a | 2026-10-18 | ded135a | 19,095 B | A | view · diff |
| git:20260327.6f188dd | 2026-03-27 | 6f188dd | 18,563 B | A | view · diff |
| git:20260105.d962356 | 2026-01-05 | d962356 | 18,453 B | A | view · diff |
| git:20251229.3e4212d | 2025-12-29 | 3e4212d | 18,429 B | A | view · diff |
| git:20251222.899966f | 2025-12-22 | 899966f | 18,428 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 (21307 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
letta-ai/letta-code · 3,759 stars · license Apache-2.0 · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_53fdjans2cpkomkh GET https://markdownregistry.com/api/v1/resolve?ref=letta-ai/letta-code/creating-skills GET https://markdownregistry.com/api/v1/blob/db83ee9bb479466444382d4efc7f4eb952c770db46a2c859cab418302bcf507e
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.
More from letta-ai/letta-code
Every file in letta-ai/letta-code