letta-ai/letta-code · src/skills/builtin/generating-mod-envs/SKILL.md

generating-mod-envs skillA

generating-mod-envs is agent-read markdown (skill) from letta-ai/letta-code: Generates and reviews mod learning env JSON files for Letta Code local mods. Use when asked to teach, learn, or optimize a mod behavior; create, draft, validate, improve, or explain envs for `/mods learn --env`; or design evaluation scenarios, memory fixtures, requiredResultMarkers, requiredTraceMarkers, negative controls, and candidate diversity hints..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add letta-ai/letta-code/generating-mod-envs@git:20260628.2f084b9
Exact content
mdr add letta-ai/letta-code/generating-mod-envs@sha256:bfac6f1c460bd97e

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_3nwhoaclj5xhy744.svg)](https://markdownregistry.com/a/art_3nwhoaclj5xhy744)

0 badge views in 30 days

Versions

versioncommittedcommitsizeaudit
git:20260628.2f084b9 latest2026-06-28 2f084b9 6,129 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (6129 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

GitHub

letta-ai/letta-code · 3,370 stars · license Apache-2.0 · pushed 2026-09-18 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_3nwhoaclj5xhy744
GET https://markdownregistry.com/api/v1/resolve?ref=letta-ai/letta-code/generating-mod-envs
GET https://markdownregistry.com/api/v1/blob/bfac6f1c460bd97ebb9d6182fa7d6bdeb98b4f02447d098b85ad72978dc7572c

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.