deskctl/openspec/changes/stabilize-v0-2-foundation/tasks.md

1. Contract and protocol stabilization

• 1.1 Define the public window_id contract in shared types/protocol code and remove backend-handle assumptions from public runtime responses
• 1.2 Update daemon state and selector resolution to map window_id and refs to internal backend handles without exposing X11-specific IDs publicly
• 1.3 Update CLI text and JSON response handling to use the new public identity consistently

2. Cheap reads and diagnostics

• 2.1 Split backend window enumeration from screenshot capture and route list-windows through a read-only path with no screenshot side effects
• 2.2 Add a daemon-independent deskctl doctor command that probes X11 environment setup, socket health, window enumeration, and screenshot viability
• 2.3 Harden daemon startup and reconnect behavior with stale socket cleanup, health probing, and clearer failure messages

3. Validation and follow-through

• 3.1 Add unit tests for selector parsing, public ID resolution, and read-only behavior
• 3.2 Add X11 integration coverage for doctor, list-windows, and daemon recovery behavior
• 3.3 Update user-facing docs and examples to reflect the new contract, doctor, and the explicit X11 support boundary