ocserve-http

The axum router implementing the opencode server wire contract (freeze 1.18.31): sessions, messages with cursor paging, SSE event streams with a byte-bounded ring, config/provider/agent/command derived routes, MCP control, permissions, questions, the question gate, and the error envelope.

Wire shapes are byte-locked by testdata/golden differential replay. See PLAN.md §3 (contract freeze) and §16–17 (route audits and divergences) in the repository root.