Delete the obsolete pre-MVP roadmap and task references now that Git preserves that development history, while retaining current V2 operational and architecture guidance.
Remove behavior-neutral server and UI plumbing that has no remaining caller: unused workspace options and cached endpoint state, redundant auto-accept metadata, an unused PTY get adapter, and a one-use message-loading helper. Keep lifecycle proof, restore gates, timeline projection, and targeted invalidation because they still enforce runtime behavior.
Validated with server and UI typechecks, the full server suite (308 passed, 3 skipped), focused UI matrices, browser-conditioned UI tests, production server/UI build, diff checks, caller searches, and an independent regression review.
Replace the V1 SDK, custom plugin, and per-workspace runtimes with the pinned OpenCode V2 client and one shared service. Model workspaces through native locations and route sessions, messages, events, files, VCS, permissions, questions, providers, commands, and MCP directly through V2 APIs.
Remove the legacy plugin and background-process layers, use native Shell and PTY support, preserve server-side Git mutations where V2 lacks parity, and update the UI, packaging, CI, architecture documentation, and translations for the new model.
Add focused coverage for shared-service ownership, Windows and WSL startup, proxy boundaries, worktree event routing, native event normalization, provider authentication, voice instructions, and location-scoped requests. Server and UI typechecks pass; remaining security review items and the real opencode2 smoke test are documented in MIGRATION_V2.md and will be completed before the draft PR is marked ready.
