{"repo":"NousResearch/hermes-agent","public_id":"81995","display_label":"MCP stdio transport fail-fast on session/process death","summary":"These items address a bug where in-flight MCP tool calls remain attached to a dead stdio subprocess or restarted transport session until a full timeout expires, rather than failing immediately. The fixes introduce fail-fast behavior when the subprocess dies or the transport session restarts.","subsystem":"mcp","counts":{"members":3,"open_issues":0,"open_issues_distinct":0,"open_prs":0,"closed_issues":1,"merged_prs":0,"attempt_prs":2},"landed_fix":null,"resolution":{"state":"unresolved","by":null},"freshness":{"state":"never_verified","last_verified_at":null,"is_stale":false},"grouping":{"backbone":"STRUCTURAL_SPANNING","link_density":0.6666666666666666},"fix_edges":[],"members":[{"kind":"issue","number":81995,"title":"[Bug]: Stalled stdio MCP cold-spawn leaves in-flight tool call attached to dead subprocess for full 300s timeout — no fail-fast on supervisor respawn","url":null,"state":"closed"},{"kind":"pr","number":82071,"title":"fix(mcp): fail RPCs when transport sessions restart","url":null,"state":"closed","close_reason":{"refs":[{"kind":"pr","value":"#48069","number":48069}],"category":"duplicate_of","implication":"duplicate"},"merged":false},{"kind":"pr","number":82219,"title":"fix(mcp): fail-fast in-flight tool calls when stdio subprocess dies (#81995)","url":null,"state":"closed","close_reason":{"refs":[{"kind":"pr","value":"#48069","number":48069},{"kind":"pr","value":"#81995","number":81995},{"kind":"pr","value":"#82071","number":82071}],"category":"superseded_by_pr","implication":"superseded"},"merged":false}],"trust":{"default_tier":"verified","includes_suggested":false}}