Decouples "many users" + "many server replicas" from "many machines" so the
platform is tenant-isolated and horizontally safe on the current single node.
- Per-signup workspaces (cm-auth): a new hosted-identity sign-in provisions and
owns its own workspace instead of joining the first. Config-gated by
auth.per_signup_workspace (default off); concurrent first-logins serialized by
a per-subject advisory lock so no duplicate workspaces.
- Terminal tickets in Postgres (migration 0016, hashed, single-use): any replica
can redeem a ticket minted by another. Drops the in-process ticket map.
- Container registry in Postgres (migration 0017, agent_containers): Terminal
and Sandbox managers resolve an agent's container through a shared registry,
so a 2nd replica reuses it instead of spawning a duplicate. node_id recorded
as 'local' (Phase 2 hook). Boot reconcile removes only true orphans, so
terminals now survive a redeploy (tmux sessions resume).
- Per-workspace quotas (cm-api/quota.rs): plan-tier caps on agents + live
containers, enforced at agent create + terminal spin-up (reconnects allowed),
returned as HTTP 402. New GET /api/quota surfaces usage vs limits.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
