The engineering control plane for Cursor
Local-first repository intelligence for AI coding agents  Arc Index, Arc Graph, blast-radius impact analysis, and a precise Cursor MCP server that stays on your machine.
Repository intelligence, evidence-first
Arcframe is local-first developer tooling that answers operational questions with labeled confidence  Confirmed, Strongly inferred, Weakly inferred, Unknown  instead of unverifiable certainty. Index and graph live under .arcframe/; core analysis never requires an Arcframe cloud upload.
Arc Index, Arc Graph, and impact
Build an incremental Arc Index of files and symbols, then an Arc Graph of imports, dependencies, tests, and routes. Ask for dependents and dependencies when you need blast radius / impact analysis before a refactor  the same engines power the CLI, Cursor MCP tools, and agent context packs.
Cursor MCP for coding agents
Wire Arcframe as a Cursor MCP server so agents call precise tools for symbols, graph edges, context budgets, memory, health, and review  not a single dump-everything endpoint. Give AI coding agents grounded repository context without leaving your workstation.
Install
Clone the monorepo, build, initialize Arcframe in a project, then start the MCP server for Cursor.
pnpm install && pnpm build
node ./cli/dist/bin.js init
node ./servers/mcp/dist/index.js