Peer
Built at Meta Global AI Developer Hackathon · Oct 26, 2026 · Remote

Coding agents are great at finishing tasks, but they finish them without you. Developers approve diffs they never really thought through, consequential decisions (a new dependency, a public API change) slip by unnoticed, and the people who most need to grow, learn nothing from the work. Peer is a desktop coding workspace (macOS and Linux) that puts a collaboration layer between you and the coding agent you already use: OpenCode, Claude Code or Codex. On every turn, Peer decides whether the agent should execute, discuss, explain, or let you lead, and it enforces that in application state instead of relying on prompting alone. - Collaborate mode works like a senior teammate: it proposes approaches with trade-offs and does the mechanical work itself. "Discuss first" locks code changes until you say proceed. - Learn mode keeps you thinking: edits stay locked until you engage, and the agent asks for your hypothesis and gives hints before the full answer. - Peer detects consequential decisions itself (new dependencies, public API changes) and pauses the tool call before it runs. - Safety is separate: destructive commands always ask, in every mode. Everything runs locally, with your own agent logins. Automate tedious work. Collaborate on meaningful work. Preserve the thinking that makes developers grow.