PDFToMD/phases/6-cli-runtime-resume/step2.md

Step 2: resume-state

Read First

• /AGENTS.md
• /PLAN.md
• /PROGRESS.md
• /docs/HARNESS.md
• /docs/IMPLEMENTATION_PLAN.md
• /docs/CONVERSION_POLICY.md
• /phases/6-cli-runtime-resume/step1.md

Task

Implement runtime resume state for successful and failed chunks.

Resume state is a runtime artifact, not a document output sidecar.

Sprint Contract

• Done means: conversion can skip completed chunks and retry failed chunks using a local state file in tests.
• Hard thresholds: state format is deterministic; stale state is detected; resume does not skip chunks when input/options changed materially.
• Files owned: src/pdftomd/resume.py, runtime integration/tests, PROGRESS.md, phase index.
• Dependencies: Progress/logging and chunk renderer contracts.

Acceptance Criteria

python scripts\validate_workspace.py
.\venv\python.exe -m pytest tests

Verification

1. Run the acceptance commands.
2. Confirm state files are written only under temp/runtime cache paths in tests.
3. Update PROGRESS.md and this phase index.

Do Not

• Do not treat resume state as part of generated document output.
• Do not skip chunks after parser/version-relevant option changes.
• Do not create hidden global state.