Add Open Library book metadata CLI

Goal

Add a Printing Press CLI for Open Library book/author/edition metadata.

Free source

• Open Library APIs.

Agent jobs

• Resolve ISBNs, editions, covers, authors, and subjects.
• Build book/research bibliographies.
• Find adjacent books by subject or author.

Proposed command shape

• open-library-pp-cli isbn 9780131103627 --agent
• open-library-pp-cli book "Designing Data-Intensive Applications" --agent
• open-library-pp-cli author "Ursula K. Le Guin" --agent
• open-library-pp-cli editions <work-id> --agent
• open-library-pp-cli subjects "distributed systems" --agent

Non-goals

No borrowing, account actions, or write-side catalog edits.\n\n## Implementation path\n\nThis is a new CLI candidate, so do not hand-build it directly in this published library repo. Run it through the canonical Printing Press generation flow in cli-printing-press, keep manuscripts/proofs, then publish into this repo with the publish flow.\n\n## Acceptance criteria\n\n- Research notes explain the source/API/feed contract, rate limits, auth needs, and freshness behavior.\n- CLI exposes a small agent-native command set, not a raw endpoint dump.\n- --json / --agent output is stable and compact.\n- If the source benefits from history, add local SQLite sync plus since/diff commands.\n- Skill includes high-signal recipes and clear non-goals.\n- Dogfood proves at least three realistic agent workflows.