docs(mcp): document new session reclamation behavior#13
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`MCP_MAX_SESSIONS` is now a soft cap: a new initialize at capacity evicts the least-recently-used session via LRU instead of returning `429 Too many active sessions`. `MCP_SESSION_TTL_SECONDS` now drives a local sweep on the serving pod in addition to the session-store TTL. Updates the env-var reference and the `/mcp` endpoint docs to match, and replaces the "session limits prevent exhaustion" line with one that notes runaway clients can no longer deny service to others under LRU.
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Summary
Companion docs update for nimblebrain#229.
MCP_MAX_SESSIONSis no longer a hard cap that returns429 Too many active sessions— it's a memory-budget knob with LRU eviction.MCP_SESSION_TTL_SECONDSnow also drives a local idle sweep on the serving pod (not just the session-store TTL).Pages updated
config/environment.mdx— rewrites theMCP_MAX_SESSIONSrow to reflect LRU and points operators at the[mcp] evicting transport reason=pressurelog line as the signal to raise the cap. TightensMCP_SESSION_TTL_SECONDSto mention the local sweep alongside the session-store TTL.api/mcp-endpoint.mdx— same change in the Sessions table; updates the "Session limits" security bullet so it doesn't claim 429 prevents runaway clients (LRU does, and more correctly).Builds cleanly via
npm run build. No content removed; no link targets changed.Test plan
npm run build— 72 pages built, no errors