Second realised slice of the determinization-roadmap (ORCH-118 A5, needs-hybrid-fallback): on the `testing` stage for the self-hosting `orchestrator` repo the LLM `tester` agent is replaced by a deterministic test-runner (src/test_runner.py), intercepted in launch_job BEFORE _spawn (deploy-finalizer / post-deploy-monitor / staging-runner precedent). It runs the regression `python -m pytest <target>` in the task worktree via proc_group (tree-kill) + an optional read-only smoke (/health, /status, /queue + serial_gate), maps the exit-code -> result: PASS|FAIL via the existing self_deploy.map_exit_code_to_status contract, writes 13-test-report.md and initiates the EXISTING check_tests_passed gate exactly as a finished LLM-tester. Invariant (NFR-1): only the *producer* changes — the artifact contract (13-test-report.md / result:), the gate check_tests_passed / _parse_tests_verdict, STAGE_TRANSITIONS and the DB schema are byte-for-byte UNCHANGED. Additive, under a kill-switch (test_runner_enabled), never-raise, fail-closed, self-hosting scope, two-level outcome (tool-error DEFER, anti ORCH-110), hybrid (LLM strictly off-control-path). 52c-`status:` is aligned with the verdict (D6.1) so the three-field _parse_tests_verdict never false-negatives a PASS. Docs (ORCH-118 NFR-6, atomic with code): llm-call-sites.md (A5 implemented), llm-determinization-roadmap.md (rank 2 implemented), llm-usage-policy.md, README/internals/overview, tester.md, CLAUDE.md, CHANGELOG.md. Coverage: tests/test_orch116_test_runner.py (TC-01..TC-14); LLM anti-drift tests green. Full suite: 2137 passed. Refs: ORCH-116 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Work item: ORCH-116 Repo: orchestrator Branch: feature/ORCH-116-orch-replace-llm-tester-with-d Stage: development