customizing-commands SKILL.md skillA
customizing-commands 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/customizing-commands@git:20261028.a8f8e4bPins git:20261028.a8f8e4b 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/customizing-commands/SKILL.md- Versions recorded
- 6
- Latest version
- git:20261028.a8f8e4b, committed Oct 28, 2026
- First version recorded
- May 25, 2026
- Size
- 3,730 bytes
- Repository stars
- 3,790
- License
- Apache-2.0
Creates, edits, and enables Letta Code mod-provided slash commands. Use when the user asks to add a custom /command, slash command, command shortcut, scoped conversation-backed command, or command-driven panel behavior.
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
# Customizing Commands
Use this as the command-specific entrypoint for local mod slash commands. For broader mod work, recipes live in `../creating-mods/references/commands.md`, `../creating-mods/references/architecture.md`, `../creating-mods/references/ui.md`, and `../creating-mods/references/plan-mode.md`.
Mod files live in:
```text
${LETTA_CONFIG_DIR:-$HOME/.letta}/mods/
```
Use a focused file name, e.g. `${LETTA_CONFIG_DIR:-$HOME/.letta}/mods/review.ts` or `${LETTA_CONFIG_DIR:-$HOME/.letta}/mods/commands.ts`.
## First decide whether a command is right
| User wants | Build |
| --- | --- |
| `/foo` sends a prompt or shows local output | Mod command |
| `/foo` starts a reusable agent workflow | Skill + thin mod command |
| Agent/model should autonomously call the capability | Mod tool, not a command |
| Command shows transient progress/results | Mod command + panel |
| Command needs model output while the main agent is busy | `runWhenBusy: true` command + forked `ctx.conversation` |
If the command is a reusable workflow like `/goal`, put the workflow instructions in a skill and keep the mod command as a small launcher/prompt.
## Workflow
…Read the whole file at its exact version.
How to install
mdr add letta-ai/letta-code/customizing-commands@sha256:0e1022e46b9616c4The line at the top of this page pins the label git:20261028.a8f8e4b, 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_arva6ixsl772ztp5)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between May 25, 2026 and Oct 28, 2026, about one every 31 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261028.a8f8e4b latest | 2026-10-28 | a8f8e4b | 3,730 B | A | view · diff |
| git:20260820.5234181 | 2026-08-20 | 5234181 | 3,630 B | A | view · diff |
| git:20260610.ff339bd | 2026-06-10 | ff339bd | 3,629 B | A | view · diff |
| git:20260606.1f73565 | 2026-06-06 | 1f73565 | 3,773 B | A | view · diff |
| git:20260527.3299161 | 2026-05-27 | 3299161 | 3,772 B | A | view · diff |
| git:20260525.4b4142a | 2026-05-25 | 4b4142a | 3,448 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 (3730 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 · 3,790 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_arva6ixsl772ztp5 GET https://markdownregistry.com/api/v1/resolve?ref=letta-ai/letta-code/customizing-commands GET https://markdownregistry.com/api/v1/blob/0e1022e46b9616c4070e1507cf6bb9158c29237ce1e4ea1aa45eb7a0bdf4d106
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.