{"repo":"NousResearch/hermes-agent","public_id":"97245","display_label":"MCP keepalive wrongly respawns stdio servers on silent ping","summary":"A bug where the MCP keepalive mechanism incorrectly treats a stdio server's silent dropping of ping messages as a dead transport, triggering unnecessary respawns. Multiple fix attempts address distinguishing silent ping drops from actual transport failures.","subsystem":null,"counts":{"members":4,"open_issues":0,"open_issues_distinct":0,"open_prs":0,"closed_issues":1,"merged_prs":1,"attempt_prs":2},"landed_fix":{"status":"merged_to_main","basis":"structural","pr":101025,"merged_at":"2026-09-02T06:56:42+00:00"},"resolution":{"state":"resolved","by":"pr-101025"},"freshness":{"state":"verified","last_verified_at":"2026-09-02T06:56:42+00:00","is_stale":false},"grouping":{"backbone":"STRUCTURAL_SPANNING","link_density":0.5},"fix_edges":[{"issue_number":97245,"pr_number":101025,"tier":"verified","basis":"closing_ref","confidence":0.95,"recoverable_from_timeline":true,"pr_merged_at":"2026-09-02T06:56:42+00:00"}],"members":[{"kind":"issue","number":97245,"title":"MCP keepalive respawn-loops a healthy stdio server that never answers ping (silent drop ≠ -32601)","url":null,"state":"closed"},{"kind":"pr","number":97258,"title":"fix(mcp): treat silent ping drop as unsupported rather than dead transport (Closes #97245)","url":null,"state":"closed","close_reason":{"refs":[{"kind":"pr","value":"#97245","number":97245}],"category":"uncategorized","implication":"needs_llm"},"merged":false},{"kind":"pr","number":97267,"title":"fix(mcp): don't respawn a live stdio server on keepalive ping failure","url":null,"state":"closed","close_reason":{"refs":[{"kind":"pr","value":"#97245","number":97245},{"kind":"pr","value":"#96470","number":96470},{"kind":"pr","value":"#97258","number":97258}],"category":"implemented_elsewhere","implication":"superseded"},"merged":false},{"kind":"pr","number":101025,"title":"fix(mcp): keepalive no longer respawns a healthy stdio server that silently drops ping (#97245, salvage #97258)","url":null,"state":"merged","close_reason":{"category":"merged"},"merged":true,"is_fix_pr":true,"fix_tier":"verified","files_changed":["tests/tools/test_mcp_capability_gating.py","tools/mcp_tool.py"]}],"trust":{"default_tier":"verified","includes_suggested":false}}