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Project Session Handoff State

This document tracks the project state at the end of each development session. It must be updated before pausing or concluding any session to ensure smooth continuation for the next agent/developer.

1. Last Updated

  • Date: 2026-06-30
  • Task Reference: Task 27: Suppress target window key inputs during transparency modal

2. Session Achievements

  • Target Window Input Suppression: Intercepted and swallowed keyboard inputs targeting the active window when the transparency modal is open, to prevent accidental typing from leaking into the background window.
  • Pure Swallow Checking Function: Created should_swallow_key helper function in src/platform/hook.rs to safely decide if keys should be swallowed. Modifier keys (Ctrl, Alt, Win, Shift) and Ctrl/Alt key combinations are preserved and not swallowed, avoiding stuck modifier states (such as stuck Shift keys after releasing the modal hotkey).
  • Deferred Keyboard Hook Release: Deferred releasing the keyboard hook until all physical keys (arrow keys, Enter, Escape, etc.) are physically released, preventing keys from getting stuck or repeating.
  • TDD & Unit Testing: Wrote a set of unit tests in src/platform/hook.rs and src/app/controller.rs verifying modifiers, active states, combination keys, and deferred hook release. All 50 tests pass successfully.
  • Hook Integration: Integrated should_swallow_key in keyboard_hook_proc to return LRESULT(1) for swallowed keys, matching active target window focus.

3. Current Task State

  • Active Task: Suppress target window key inputs.
  • Status: Complete.

4. Pending / Next Steps

  • None.

5. System State & Compile Verification

  • Code compiles: Yes (cargo check and cargo build successful)
  • Tests passing: Yes (cargo test successful: 50 tests passed)