# 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.