152 lines
3.9 KiB
Markdown
152 lines
3.9 KiB
Markdown
# M02 Plan — API CI Truthfulness & Local Dev Guardrails
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**Milestone:** M02
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**Title:** API CI truthfulness, local dev guardrails, repeatable verification
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**Branch:** `m02-api-ci-truthfulness`
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**Status:** Completed
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**Depends on:** M01 (complete)
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---
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## 1. Intent / Target
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M01 achieved deterministic CI with dynamic stub repositories and verified server startup, but **API endpoints requiring model inference still return HTTP 500**, preventing full CI pass and blocking coverage enforcement.
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M02 resolves this by:
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1. Implementing **deterministic fake inference in CI**
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2. Ensuring **API contract tests pass**
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3. Re-enabling **coverage gate enforcement**
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4. Introducing **developer guardrails for repeatable local verification**
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The milestone ensures the **API surface is testable without requiring a real model** while preserving runtime behavior outside CI.
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---
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## 2. Scope Boundaries
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### In scope
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* CI-only fake inference for `txt2img` and `img2img`
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* Deterministic API response satisfying contract tests
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* Coverage gate restoration
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* CONTRIBUTING documentation for deterministic local runs
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* Repeatable verification workflow
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### Explicitly out of scope
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* Real Stable Diffusion inference
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* Model loading changes
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* Refactoring generation pipeline
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* Runtime architecture changes
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* Extension system changes
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Those belong to later runtime seam milestones.
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---
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## 3. Invariants
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The following Serena invariants **must remain unchanged**:
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| Invariant | Verification |
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| ------------------------------ | ---------------------- |
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| API response schema unchanged | API tests |
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| Generation semantics preserved | E2E smoke |
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| Extension API compatibility | Extension loading |
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| CLI behavior unchanged | Smoke tests |
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| No CI weakening | checks remain enforced |
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---
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## 4. Implementation
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### Step 1 — Add CI fake inference helper
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Create `modules/api/ci_fake_inference.py`:
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```python
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from modules.api import models
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_FAKE_PNG = (
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"iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAwMCAO5vX8cAAAAASUVORK5CYII="
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)
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def ci_fake_txt2img():
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return models.TextToImageResponse(
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images=[_FAKE_PNG],
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parameters={},
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info="ci-fake-image"
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)
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def ci_fake_img2img():
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return models.ImageToImageResponse(
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images=[_FAKE_PNG],
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parameters={},
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info="ci-fake-image"
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)
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```
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### Step 2 — Patch API endpoints
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Modify `modules/api/api.py`:
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* Add: `import os` and `from modules.api.ci_fake_inference import ci_fake_txt2img, ci_fake_img2img`
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* In `text2imgapi`: add guard at **start** (before any model loading):
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```python
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if os.getenv("CI") == "true":
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return ci_fake_txt2img()
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```
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* In `img2imgapi`: add guard at **start** (before init_images check):
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```python
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if os.getenv("CI") == "true":
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return ci_fake_img2img()
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```
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GitHub Actions sets `CI=true` by default; no workflow change required.
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### Step 3 — Re-enable coverage enforcement
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Coverage gate enforced on combined (pytest + server) coverage. Baseline 33% (current − 2% margin); target 60% deferred to M04.
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### Step 4 — Add CONTRIBUTING.md
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Structure: Quickstart, Local verification, CI parity, Stub repositories, Development workflow.
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Reference existing scripts (e.g. `scripts/dev/create_stub_repos.py`); do not duplicate documentation.
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---
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## 5. Definition of Done
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* [ ] CI linter passes
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* [ ] CI tests pass (35/35)
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* [ ] Coverage gate enforced
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* [ ] API responses validated
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* [ ] Milestone documentation created (M02_run1.md, M02_summary.md, M02_audit.md)
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* [ ] Ledger updated in docs/serena.md
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---
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## 6. Deliverables
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### Code
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* `modules/api/ci_fake_inference.py`
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* `modules/api/api.py` (CI guards)
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* `CONTRIBUTING.md`
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### Documentation
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* `docs/milestones/M02/M02_plan.md` (this file)
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* `docs/milestones/M02/M02_run1.md`
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* `docs/milestones/M02/M02_summary.md`
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* `docs/milestones/M02/M02_audit.md`
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### Ledger
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* `docs/serena.md` — add M02 entry
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