v0.4.2 - Agent-visible hook warnings

Changes

Fix: Pi hook warnings now visible to agent (#2)

Previously, the Pi hook used ctx.ui.notify() which only showed notifications to the human user in the TUI. The agent never saw these warnings.

Fix: Changed from tool_call with ctx.ui.notify() to tool_result event that modifies bash output content directly. The warning is now appended to git add output so the agent sees it.

Claude Code: Switch to prompt-based hook

Changed from PostToolUse command hook to PreToolUse with type: 'prompt'. This is a cleaner integration - Claude evaluates the prompt and includes the reminder in its response.

Consistent warning message

All hooks now show the same message with a features.json reminder:

⚠️ Long-task-harness: .long-task-harness/long-task-progress.md is not staged.
   If relevant, also update features.json with completed/failed features.
   Update these files before committing to maintain session continuity.

Removed

• droid_install_hooks.py and droid_precommit_check.py - Droid hooks didn't work as expected
• claude_code_precommit_check.py - replaced by prompt-based hook