{
  "title": "Fix runner prompt delivery after partial stdin timeout",
  "reason": "Reviewer startup hangs waiting for stdin EOF: runner retries communicate(None) after a .2s partial-write timeout. Reproduced with delayed stdin reader and 80000-byte payload on Python 3.9.6; no S00-002 acceptance review was performed.",
  "reproduction": "state/evidence/S00-002-manual-security-stdin-20261015a.md",
  "role": "ci-cd",
  "reviewer_role": "qa",
  "scope": [
    "scripts/runner.py",
    "tests/tooling/test_automation.py"
  ],
  "outcome": "Reliable complete prompt delivery under startup delay and pipe backpressure, preserving runner lifecycle guarantees.",
  "steps": [
    "Read diagnostic evidence and reproduce delayed-reader partial-write timeout without launching a model.",
    "Fix only runner stdin delivery; retain fresh sessions, prompt budget, terminal-transition monitoring, timeout and process-tree cleanup.",
    "Add a deterministic delayed-reader large-prompt regression check and run focused runner tests plus make check.",
    "Record evidence/handoff/commit message and submit for independent review."
  ],
  "acceptance": [
    "A delayed stdin reader receives the complete large UTF-8 prompt and EOF without hanging.",
    "Timeout and terminal-transition process cleanup still work; no background source-writing descendants remain.",
    "Existing runner/tooling checks pass; no task scope, spec snapshots or product implementation is changed."
  ],
  "checks": [
    "Delayed-reader large UTF-8 prompt regression.",
    "Existing runner timeout, transition, scope and fresh-session tests.",
    "make check"
  ],
  "depends_on": [],
  "requires_user_input": false
}