MCP session reuse and host identity

Canonical docs live in the monorepo: intent discovery (primary seed route) and mcp-session-reuse.md (session / logical_session_ref contract). This page is a short pointer for the plasm-core doc site — do not treat older discover-first wording as current.

Flow (summary)

1. plasm_context session_mode: "new" + intent only when semantic auto-seed is enabled → host routes seeds (intent discovery); ready mints logical_session_ref + teaching TSV.
2. plasm / plasm_run with the same logical_session_ref.
3. discover_capabilities is secondary — browse / recover after hard_miss or pick explicit seeds.

Session identity is logical_session_ref only, selected via session_mode — not by the intent string. See the monorepo session-reuse doc for SessionReuseKey, extend, federation, and stale-binding rules.