darwin

A self-improving coding-agent harness — MiMo-Code's feature set (reference spec: docs/SPEC.md) re-implemented as a plugin, first for opencode v1, then for Claude Code. Not a fork: 100% feature parity via plugin APIs where possible, with documented exceptions (docs/FEASIBILITY.md).

Status: work in progress. The opencode plugin exists; the Claude Code port ships skills only so far, and nothing is published to npm. MIT licensed.

• docs/RUNDOWN.md — every capability × limits × keep/toss verdict (decision doc)
• docs/SPEC.md — complete MiMo-Code specification (vendored @ 092e42f, 2026-08-29)
• docs/FEASIBILITY.md — plugin-parity mapping + concerns
• docs/PLAN.md — porting plan (opencode first, then Claude Code)

Install (Claude Code, skills only)

The bundled skills are installable as a Claude Code plugin. This is skills only: the host-agnostic harness (memory, scheduler, economics) is not ported to Claude Code yet.

/plugin marketplace add alliecatowo/claude-code-darwin
/plugin install darwin@darwin

Status

Pre-release and unpublished (no npm package or release yet). Port status:

Host	Package	State
opencode v1	packages/opencode	In progress; shared logic lives in packages/core
Claude Code	packages/claude	Not started (phase 2, see docs/PLAN.md); no Claude Code plugin exists in this repo yet

packages/core is host-agnostic and has tests (bun test packages/core).

Development

npm ci                     # install (npm workspaces)
npm run typecheck          # tsc over packages/core and packages/opencode
bun test packages/core     # unit tests (store, memory, scheduler, goal, economics); Bun 1.4+

packages/core uses bun:sqlite, so tests need Bun; CI runs both commands on every push and pull request. Agents working in this repo: see .opencode/ and docs/PLAN.md.