Architecture

One engine — surfaces are thin:

Package	Role
@arcframe/core	Config, paths, cache, events, DI, permissions, process
@arcframe/storage	SQLite (node:sqlite)
@arcframe/analyzer	Arc Index + language adapters + FS watcher
@arcframe/graph	Arc Graph + impact
@arcframe/memory	Memory, sessions, tasks, decisions
@arcframe/context	Budgeted context packs
@arcframe/engineering	Git, health, doctor, test/build/validate/review/changes
@arcframe/workflows	Arc Flows
cli	arc / arcframe
servers/mcp	MCP tools, resources, prompts

Optional accelerators live under native/ (Rust arcframe-hashwalk, Go arcframe-gitmeta). TypeScript remains the control plane; binaries are discovered via ARCFRAME_NATIVE_DIR / native/bin with JS fallback. See native/README.md.

Cursor plugin and docs/landing do not reimplement analysis.