{"repo":"NousResearch/hermes-agent","public_id":"43044","display_label":"MCP orphan reaper PGID recycling safety fixes","summary":"These issues and PRs address a bug where the orphan MCP process reaper could send SIGTERM to unrelated processes if a process group ID (PGID) was recycled by the OS. The work involves adding per-process PID isolation, PGID ownership re-validation, and guards against this unsafe kill behavior.","subsystem":"gateway","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":131910,"merged_at":"2026-10-03T01:29:19+00:00"},"resolution":{"state":"resolved","by":"pr-131910"},"freshness":{"state":"verified","last_verified_at":"2026-10-03T01:29:19+00:00","is_stale":false},"grouping":{"backbone":"STRUCTURAL_SPANNING","link_density":0.5},"fix_edges":[{"issue_number":43044,"pr_number":131910,"tier":"verified","basis":"closing_ref","confidence":0.95,"recoverable_from_timeline":true,"pr_merged_at":"2026-10-03T01:29:19+00:00"}],"members":[{"kind":"issue","number":43044,"title":"Gateway orphan-MCP reaper can SIGTERM an unrelated process via a recycled PGID","url":null,"state":"closed"},{"kind":"pr","number":43046,"title":"fix(mcp): re-validate PGID ownership before killing orphaned process groups","url":null,"state":"closed","close_reason":{"refs":[{"kind":"pr","value":"#131910","number":131910}],"category":"implemented_elsewhere","implication":"superseded"},"merged":false},{"kind":"pr","number":43135,"title":"fix(mcp): guard orphan reaper against recycled PGID killing unrelated processes","url":null,"state":"closed","close_reason":{"category":"uncategorized","implication":"needs_llm"},"merged":false},{"kind":"pr","number":131910,"title":"fix(mcp): re-validate PGID ownership before killing orphaned process groups [risk 0.20]","url":null,"state":"merged","close_reason":{"category":"merged"},"merged":true,"is_fix_pr":true,"fix_tier":"verified","files_changed":["tests/tools/test_mcp_stability.py","tools/environments/local.py","tools/mcp_tool_lifecycle.py","tools/mcp_tool_transport.py"]}],"trust":{"default_tier":"verified","includes_suggested":false}}