{
  "overall_correctness": "incorrect",
  "explanation": "Moving retirement before spawn fixes the newly reported orphan-on-retirement-error path, but preflight now destroys the previous process identity before knowing whether its replacement can launch. This can strand a recycled-PID corpse and cause an authenticated kill path to treat the unrelated process as the shell. Source inspection only; no runtime validation was run.",
  "confidence": 0.99,
  "findings": [
    {
      "title": "Preserve the old PID–birth identity until replacement succeeds",
      "body": "`prepare_shell_launch` deletes the old birth stamp while leaving the old `shell.pid`, before the subsequent spawn can fail. For the recycled live PID in the new missing-executable wake test, the first wake now returns the expected spawn error but permanently removes the evidence that the PID belongs to another process; the next wake or restore adopts that unrelated PID and leaves the actual shell down. More seriously, `kill_shell_at` reads a missing birth as legacy bare-PID custody (`RelayLiveness::Held`), so a later close—or one racing the preflight window—can kill the unrelated process that the previous stamp would have protected. Keep the old identity coherent through preparation and failed launches rather than exposing the old PID without its birth.",
      "priority": 1,
      "confidence": 0.99,
      "file_path": "C:/Users/decid/Documents/projects/spt-core/.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs",
      "line_start": 177,
      "line_end": 184
    }
  ]
}