2 Commits

• Stabilize RMCP pid file cleanup test (#13881)

  ## What changed
  - The pid-file cleanup test now keeps polling when the pid file exists
  but is still empty.
  - Assertions only proceed once the wrapper has actually written the
  child pid.
  
  ## Why this fixes the flake
  - File creation and pid writing are not atomic as one logical action
  from the test’s point of view.
  - The previous test sometimes won the race and read the file in the tiny
  window after creation but before the pid bytes were flushed.
  - Treating “empty file” as “not ready yet” synchronizes the test on the
  real event we need: the wrapper has finished publishing the child pid.
  
  ## Scope
  - Test-only change.

  Ahmed Ibrahim · 2026-03-09 10:01:34 -07:00
  6052558a01
• Process-group cleanup for stdio MCP servers to prevent orphan process storms (#10710)

  This PR changes stdio MCP child processes to run in their own process
  group
  * Add guarded teardown in codex-rmcp-client: send SIGTERM to the group
  first, then SIGKILL after a short grace period.
  * Add terminate_process_group helper in process_group.rs.
  * Add Unix regression test in process_group_cleanup.rs to verify wrapper
  + grandchild are reaped on client drop.
  
  Addresses reported MCP process/thread storm: #10581

  Eric Traut · 2026-02-06 21:26:36 -08:00
  82c981cafc