adding-models SKILL.md skillA
adding-models 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/adding-models@git:20260904.5d21ac4Pins git:20260904.5d21ac4 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
.skills/adding-models/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260904.5d21ac4, committed Sep 4, 2026
- First version recorded
- Dec 22, 2025
- Size
- 4,197 bytes
- Repository stars
- 3,759
- License
- Apache-2.0
Guide for adding new LLM models to Letta Code. Use when the user wants to add support for a new model, needs to know valid model handles, or wants to update model-specific compatibility behavior. Covers runtime catalog sources, CI test matrices, and handle validation.
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
# Adding Models This skill guides you through adding a new LLM model to Letta Code. ## Quick Reference **Key files**: - `src/agent/remote-model-catalog.ts` - Runtime catalog loading and projection - `src/agent/model-catalog.ts` - Model lookup and compatibility aliases - `.github/workflows/ci.yml` - CI test matrix (optional) - `src/tools/manager.ts` - Toolset detection logic (rarely needed) ## Workflow ### Step 1: Find Valid Model Handles First identify the agent source. These inputs are deliberately different: | Agent source | Rows shown | Labels, presets, and capabilities | |---|---|---| | Cloud hosted | `GET /v1/models/catalog` only | `GET /v1/models/catalog` | | Cloud organization BYOK | BYOK rows from `GET /v1/models` | Match to catalog metadata using provider metadata and model name; retain the BYOK handle for selection | | Local | pi-ai inventory | pi-ai metadata | | Custom App Server | Server runtime inventory | Server runtime metadata | In Cloud mode, never use base/hosted rows from `GET /v1/models` to filter, supplement, delay, or provide a fallback for the hosted catalog. This once made …
Read the whole file at its exact version.
How to install
mdr add letta-ai/letta-code/adding-models@sha256:d1b63c141aaf8215The line at the top of this page pins the label git:20260904.5d21ac4, 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_hf6cwitd5mgngjzm)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Dec 22, 2025 and Sep 4, 2026, about one every 128 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260904.5d21ac4 latest | 2026-09-04 | 5d21ac4 | 4,197 B | A | view · diff |
| git:20260822.1f4d3e3 | 2026-08-22 | 1f4d3e3 | 3,266 B | A | view · diff |
| git:20251222.899966f | 2025-12-22 | 899966f | 3,296 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 (4197 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_hf6cwitd5mgngjzm GET https://markdownregistry.com/api/v1/resolve?ref=letta-ai/letta-code/adding-models GET https://markdownregistry.com/api/v1/blob/d1b63c141aaf82158e8d362f1fe6e10411c791fb75434df930e7f8a605b42879
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.