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M13: txt2img path through runner (#31)
* M13: txt2img path through runner — contract test and verification - Add test_txt2img_runner_contract.py verifying txt2img invokes ProcessingRunner - No routing changes: process_images already delegates to runner (M10) - Update M13_plan, M13_toolcalls, M13_run1 - Scope: UI txt2img only; API/img2img in M14/M15 Made-with: Cursor * docs(M13): add CI run1 results — smoke tests pass Made-with: Cursor
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150
docs/milestones/M13/M13_plan.md
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docs/milestones/M13/M13_plan.md
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# M13 — txt2img Execution via Runner
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Phase: Phase III — Runner & Service Boundary
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Status: Planned
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---
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# 1. Intent / Target
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Route the **txt2img execution path** through `ProcessingRunner` explicitly.
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Right now the runner exists but is still only used by the internal `process_images` wrapper. M13 makes the runner the **true execution surface** for txt2img while preserving behavior.
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### Architectural impact
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Before:
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```
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UI/API
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│
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process_images
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│
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runner
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```
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After:
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```
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UI/API
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│
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Runner
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│
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Pipeline
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```
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This begins the **UI/runtime separation** that Serena is aiming for.
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---
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# 2. Scope Boundaries
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## In scope
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• Route txt2img path via runner
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• Preserve existing request objects
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• No UI or API behavior changes
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## Out of scope
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• API runner
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• queue runner
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• cancellation
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• progress reporting
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---
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# 3. Invariants
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| Surface | Requirement | Verification |
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|---------------|---------------|--------------|
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| CLI behavior | unchanged | smoke tests |
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| API responses | unchanged | smoke tests |
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| Output images | identical | quality tests|
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| Extensions | unaffected | extension tests |
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---
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# 4. Verification Plan
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CI must remain green.
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Expected checks:
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| Check | Expected |
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|-------|----------|
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| Linter | pass |
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| Smoke Tests | pass |
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| Quality Tests | pass (post-merge) |
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| Coverage | ≥ 40% |
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---
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# 5. Implementation Steps
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1. **Verify routing** — txt2img path calls `process_images` only; no direct `process_images_inner` in `modules/txt2img.py`. ✓
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2. **Confirm delegation** — `process_images` delegates to `ProcessingRunner().run(ProcessingRequest(p))` inside profiler block. ✓
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3. **Add contract test** — `test/quality/test_txt2img_runner_contract.py` verifies txt2img path invokes runner. ✓
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4. **No routing changes required** — Runner already sits behind `process_images` (M10–M12). Verification milestone.
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Key principle: txt2img call path must flow through `ProcessingRunner.run()` while preserving identical behavior.
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---
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# 6. Risk & Rollback Plan
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Risk level: **Low** (routing verification milestone; runner already used by process_images)
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Rollback: revert txt2img routing commit; restore direct process_images path.
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---
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# 7. Deliverables
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Code:
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```
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modules/runtime/runner.py
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modules/processing.py
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```
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Tests:
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```
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test/quality/test_processing_runner.py
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test/quality/test_txt2img_runner_contract.py # M13 contract test
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```
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Docs:
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```
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docs/milestones/M13/M13_plan.md
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docs/milestones/M13/M13_toolcalls.md
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docs/milestones/M13/M13_run1.md
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docs/milestones/M13/M13_summary.md
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docs/milestones/M13/M13_audit.md
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```
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Ledger:
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```
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docs/serena.md
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```
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Tag:
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```
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v0.0.13-m13
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```
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---
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# 8. Exit Criteria
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M13 closes when:
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• PR CI passes
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• post-merge Quality Tests pass
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• txt2img routed through runner merged
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• ledger updated
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• tag created
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104
docs/milestones/M13/M13_run1.md
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docs/milestones/M13/M13_run1.md
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# M13 Run 1 — CI Analysis
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**Milestone:** M13 — txt2img execution via runner
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**Branch:** m13-txt2img-runner
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**PR:** [#31](https://github.com/m-cahill/serena/pull/31)
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**Baseline:** v0.0.12-m12 (46cf6d1c)
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---
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## 0. Workflow Run — Actual Results
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| Item | Value |
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|------|-------|
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| **Workflow** | Smoke Tests |
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| **Run ID** | [23038170275](https://github.com/m-cahill/serena/actions/runs/23038170275) |
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| **Trigger** | pull_request (#31) |
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| **Branch** | m13-txt2img-runner |
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| **Commit** | 142f0bbe |
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| **Status** | ✓ completed |
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| **Conclusion** | ✓ success |
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| **Duration** | 2m 45s |
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### Job: smoke tests
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| Step | Result |
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|------|--------|
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| Verify repository | ✓ |
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| Verify base branch | ✓ |
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| Checkout Code | ✓ |
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| Set up Python 3.10 | ✓ |
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| Cache models | ✓ |
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| Install test dependencies | ✓ |
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| Install runtime dependencies | ✓ |
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| Create stub repositories | ✓ |
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| Setup environment | ✓ |
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| Smoke startup | ✓ |
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| Start test server | ✓ |
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| **Run smoke tests** | ✓ |
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| Kill test server | ✓ |
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| Upload main app output | ✓ |
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**Annotation:** Node.js 20 actions deprecation warning (informational; not merge-blocking).
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---
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## 1. Implementation Summary
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M13 was a **verification milestone**. No routing changes were required because:
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- `process_images` already delegates to `ProcessingRunner().run(ProcessingRequest(p))` (M10)
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- `modules/txt2img.py` calls `process_images(p)` only (lines 83, 109) — no direct `process_images_inner` calls
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- txt2img → process_images → runner → process_images_inner flow was already in place
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### Changes Made
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| File | Change |
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|------|--------|
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| `test/quality/test_txt2img_runner_contract.py` | New contract test verifying txt2img path invokes runner |
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| `docs/milestones/M13/M13_plan.md` | Updated implementation steps, risk level, deliverables |
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| `docs/milestones/M13/M13_toolcalls.md` | Tool call log |
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### Code Diff Size
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~50 lines (new test file + doc updates). No changes to `modules/txt2img.py`, `modules/processing.py`, or `modules/runtime/runner.py`.
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---
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## 2. CI Results
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| Workflow | Trigger | Expected | Actual |
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|----------|---------|----------|--------|
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| Smoke Tests | PR | ✓ pass | ✓ pass (2m 45s) |
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| Quality Tests | Push to main | ✓ pass | Pending (post-merge) |
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| Coverage | Push to main | ≥ 40% | Pending (post-merge) |
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---
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## 3. Refactor Target
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- **Surface:** txt2img UI path → process_images → ProcessingRunner
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- **Posture:** Behavior-preserving
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- **Verification:** Contract test locks in runner invocation
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---
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## 4. Architectural Sign
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That routing required no changes is a **positive signal**: the runner seam introduced in M10–M12 is correctly positioned. All consumers (txt2img, img2img, API) that call `process_images` already flow through the runner.
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---
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## 5. Conclusion
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**Run 1 status: ✓ GREEN.** Smoke tests passed. PR #31 is ready for merge (with permission).
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---
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## 6. Next Steps
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1. ~~Await PR smoke CI pass~~ ✓ Done
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2. Merge PR (with permission)
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3. Verify quality tests pass on main (post-merge)
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4. Update ledger, create tag v0.0.13-m13
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5. Proceed to M14 (API integration)
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12
docs/milestones/M13/M13_toolcalls.md
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docs/milestones/M13/M13_toolcalls.md
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# M13 Toolcalls — txt2img Execution via Runner
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Implementation toolcalls for Cursor execution.
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| Timestamp | Tool | Purpose | Files/Target | Status |
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|-----------|------|---------|--------------|--------|
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| 2026-03-12 | read | Verify baseline tag, branch creation | git, conftest | Done |
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| 2026-03-12 | read | Verify txt2img routing, process_images delegation | txt2img.py, processing.py | Done |
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| 2026-03-12 | write | Add contract test | test/quality/test_txt2img_runner_contract.py | Done |
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| 2026-03-12 | search_replace | Update M13_plan implementation steps, risk, deliverables | docs/milestones/M13/M13_plan.md | Done |
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| 2026-03-12 | write | M13_run1 CI analysis | docs/milestones/M13/M13_run1.md | Done |
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| 2026-03-12 | run | Push branch, create PR | git push, gh pr | Done (PR link below) |
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55
test/quality/test_txt2img_runner_contract.py
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55
test/quality/test_txt2img_runner_contract.py
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"""M13 contract test: txt2img path uses ProcessingRunner.
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Verifies that the txt2img execution path flows through process_images → runner,
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not direct process_images_inner calls.
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"""
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from modules.runtime.runner import ProcessingRunner
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def test_txt2img_path_uses_runner(monkeypatch, initialize):
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"""txt2img path invokes ProcessingRunner when process_images is called."""
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from modules.processing import (
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StableDiffusionProcessingTxt2Img,
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process_images,
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Processed,
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)
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calls = []
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class TestRunner(ProcessingRunner):
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def execute(self, state):
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calls.append("runner_execute")
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return super().execute(state)
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monkeypatch.setattr(
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"modules.runtime.runner.ProcessingRunner",
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TestRunner,
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)
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# Minimal processing object matching txt2img path
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p = StableDiffusionProcessingTxt2Img(
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sd_model=None,
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prompt="test",
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override_settings={},
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steps=1,
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width=64,
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height=64,
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extra_generation_params={},
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)
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p.scripts = None
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p.comments = []
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# Mock process_images_inner to avoid full pipeline (model, device, etc.)
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def fake_inner(proc):
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return Processed(proc, [], seed=-1, info="", comments="")
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import modules.processing as proc_mod
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monkeypatch.setattr(proc_mod, "process_images_inner", fake_inner)
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# Mock model reload to avoid loading weights
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import modules.sd_models as sd_models_mod
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monkeypatch.setattr(sd_models_mod, "reload_model_weights", lambda: None)
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process_images(p)
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assert "runner_execute" in calls
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