---
name: cto-case-stage2-artificial-fixture-issues
tier: local
status: draft
owner: jp
source: sot/03-PROTOCOLS/CTO-CASE-STAGE2-ARTIFICIAL-FIXTURE-PRD.md
created: 2026-05-31
last_reviewed: 2026-05-31
lifecycle_classification: planning
core_promotion_status: not-promoted
description: Child-local issue sequence for Stage 2 Case artificial fixture proof.
---

# CTO Case Stage 2 Artificial Fixture Issues

Local planning SOT only. Not a Core Protocol. Not active Core authority.

## Issue Sequence

### CTO-WORK-011 - Stage 2 Artificial Fixture PRD

Type: AFK

Blocked by: CTO-WORK-010

User stories covered: CTO Case Candidate Backend PRD stories 4, 5, 7, 8, 9, 10, 11, 13.

What to build: Define the Stage 2 artificial fixture proof before implementation starts.

Acceptance criteria:

- [ ] PRD states Stage 2 allowed mutation scope is `copied artificial case only`.
- [ ] PRD requires Stage 1 validation before Stage 2.
- [ ] PRD requires `CTO_HARNESS_ALLOW_CASE=1` and `CTO_HARNESS_CASE_STAGE=2`.
- [ ] PRD defines allowed roots as `runtime_workspace_root` and `run_artifact_dir`.
- [ ] PRD keeps fake as the default validation lane.
- [ ] PRD forbids Target Repository, Case source, vendor source, external developer repo, Hermes WebUI, and Cortex Core mutation.
- [ ] PRD requires no-target-inspection proof from task contract, command arguments, runtime inputs, environment, and config.
- [ ] PRD requires full Harness Evidence Interface artifacts, digests, freshness proof, and allowed-write proof.
- [ ] PRD requires same-run fake baseline comparison.
- [ ] PRD requires no-diff, disallowed-file, failed-tests, missing-test-command, missing-required-event, and provider-unavailable failure fixtures.
- [ ] Local CTO validator checks Stage 2 PRD and issue artifact.

Allowed files: CTO child workspace planning docs and local validator only.

Validator: `python3 tools/validate_cto_child.py`

Done evidence: PRD, issue artifact, validator JSON, clean worktree, commit.

### CTO-WORK-012 - Stage 2 Harness Artificial Fixture Route

Type: AFK

Blocked by: CTO-WORK-011

User stories covered: CTO Case Candidate Backend PRD stories 4, 5, 7, 8, 9, 10, 11, 13.

What to build: In `/home/svrnty/workspaces/hermes/cto/harness`, implement the Stage 2 Case artificial fixture route behind the existing `case` engine seam.

Acceptance criteria:

- [ ] `case` remains disabled by default.
- [ ] `CTO_HARNESS_ALLOW_CASE=1` remains required.
- [ ] `CTO_HARNESS_CASE_STAGE=2` is required before artificial fixture Case execution.
- [ ] Missing Stage 2 gate emits blocked evidence and does not run Case.
- [ ] Passing Stage 2 run mutates only the copied artificial runtime workspace.
- [ ] No Target Repository path is inspected or copied.
- [ ] Task contract, command arguments, runtime inputs, environment, and config expose no Target Repository path.
- [ ] Writable roots are limited to `runtime_workspace_root` and `run_artifact_dir`.
- [ ] No files under harness source checkout, target repo, Case source, vendor source, external developer repositories, or Cortex Core are changed during execution.
- [ ] Required artifacts include `report.json`, `report.md`, `events.normalized.jsonl`, `trace.jsonl`, `patch.diff`, `test.log`, and backend raw logs under `backend/`.
- [ ] `report.json` records `backend: case`, `source_admission_status: not_admitted`, `case_process_started`, `allowed_writes_passed`, changed files, blockers, artifact digests, and freshness proof.
- [ ] Pass events include `run.started`, `task.contract.created`, `plan.updated`, `patch.applied`, `git.diff.checked`, `verification.completed`, and `run.completed`.
- [ ] Same-run fake baseline comparison records fake and Case artifact paths.
- [ ] Failure fixtures fail closed for no diff, disallowed file, failed tests, missing test command, missing required event, and provider unavailable.
- [ ] Fake remains the default validation lane and broad health remains green after focused Stage 2 validation.

Allowed files: Hermes CTO harness engine, artificial fixtures, focused Stage 2 validator, harness docs, and tests. WebUI, Core, Case source, vendor source, and Target Repositories are forbidden.

Validator: `python3 harness/runner/validate-case-stage2.py --harness-root harness --json`, then `harness/evals/health.sh --json`.

Done evidence: Stage 2 pass report, failure fixture reports, artifact digests, no-mutation proof, clean worktree, commit.

## Granularity Check

This is intentionally two slices: one planning route and one executable harness route. It is not over-granular because Stage 2 is the first Case execution boundary and must be reviewed before any copied-repo work.