## 1. Implementation
- [x] 1.1 Add screenshot and OCR configuration options.
- [x] 1.2 Capture active-window screenshots through a Windows adapter and testable abstraction.
- [x] 1.3 Save screenshots to the configured assistant-context attachments folder.
- [x] 1.4 Append timestamped screenshot markdown blocks to assistant context.
- [x] 1.5 Add optional OCR/vision processing with timeout and default prompt.
- [x] 1.6 Wait for pending screenshot OCR before summary generation.
- [x] 1.7 Register a configurable screenshot hotkey.

## 2. Verification
- [x] 2.1 Cover screenshot save/link behavior.
- [x] 2.2 Cover disabled and configured OCR behavior.
- [x] 2.3 Cover summary waiting for pending OCR.
- [x] 2.4 Run relevant tests and strict OpenSpec validation.