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phases/1-core-runtime-contracts/step0.md

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+# Step 0: input-normalization-slug
+
+## Read First
+- /AGENTS.md
+- /PLAN.md
+- /PROGRESS.md
+- /docs/HARNESS.md
+- /docs/IMPLEMENTATION_PLAN.md
+- /docs/ARCHITECTURE.md
+- /docs/CONVERSION_POLICY.md
+- /phases/0-harness-foundation/index.json
+
+## Task
+Implement deterministic input normalization and document slug generation for local PDF paths.
+
+Cover `pathlib` handling for Korean filenames, spaces, relative paths, absolute paths, and long Windows paths. The API should not invoke Marker, Nougat, PyMuPDF, or any conversion logic.
+
+## Sprint Contract
+- Done means: the core package has a tested function or small module that normalizes input PDF paths and produces stable document slugs.
+- Hard thresholds: same input path and options produce the same slug; non-PDF paths fail clearly; Korean and spaced paths are tested; no parser import is introduced.
+- Files owned: `src/pdftomd/`, `tests/`, `PROGRESS.md`, `phases/1-core-runtime-contracts/index.json`.
+- Dependencies: Phase 0 package skeleton and model contracts.
+
+## Acceptance Criteria
+```powershell
+python scripts\validate_workspace.py
+.\venv\python.exe -m pytest tests
+```
+
+## Verification
+1. Run the acceptance commands.
+2. Confirm `PROGRESS.md` records the handoff and validation result.
+3. Update this phase index step to `completed`, `blocked`, or `error`.
+
+## Do Not
+- Do not implement PDF parsing.
+- Do not write conversion output.
+- Do not add UI code.