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phases/1-core-runtime-contracts/step2.md

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+# Step 2: output-bundle-contract
+
+## Read First
+- /AGENTS.md
+- /PLAN.md
+- /PROGRESS.md
+- /docs/HARNESS.md
+- /docs/IMPLEMENTATION_PLAN.md
+- /docs/ARCHITECTURE.md
+- /docs/CONVERSION_POLICY.md
+- /phases/1-core-runtime-contracts/step0.md
+- /phases/1-core-runtime-contracts/step1.md
+
+## Task
+Define deterministic output bundle path rules for chunk Markdown files, image assets, anchors, and runtime artifacts.
+
+This is a contract step. It may include lightweight path helpers and tests, but it should not render Markdown or write parsed document content.
+
+## Sprint Contract
+- Done means: output directory, chunk file names, image asset names, and runtime log/state locations are modeled and tested.
+- Hard thresholds: document output sidecars remain out of scope; runtime logs/state are separated from Markdown bundle output; asset naming is deterministic.
+- Files owned: `src/pdftomd/`, `tests/`, `PROGRESS.md`, `phases/1-core-runtime-contracts/index.json`.
+- Dependencies: Steps 0 and 1.
+
+## Acceptance Criteria
+```powershell
+python scripts\validate_workspace.py
+.\venv\python.exe -m pytest tests
+```
+
+## Verification
+1. Run the acceptance commands.
+2. Confirm generated path contracts match `docs/ARCHITECTURE.md`.
+3. Update `PROGRESS.md` and this phase index.
+
+## Do Not
+- Do not implement the renderer.
+- Do not write files under `output/` in tests unless using a temp directory.
+- Do not create sidecar metadata output.