Fix duplicate hooks and summarization failures

[nick-titus]

Summary

• Fix duplicate SessionStart hook firing by removing explicit hooks declaration from plugin.json (auto-discovered by convention)
• Add SessionEnd hook for sync on session close
• Fix summarization failures: implement graceful fallback when session resume fails for old/expired sessions
• Add ISSUES-AND-FIXES.md documenting both issues and their fixes

Test plan

• Verified SessionStart hook fires once (not twice)
• Tested episodic-memory sync - summaries now generate via fallback instead of failing
• Build passes (npm run build)

🤖 Generated with Claude Code

[gemini-code-assist]

Summary of Changes

Hello @nick-titus, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly improves the stability and functionality of the episodic memory plugin by addressing critical issues related to hook execution and conversation summarization. It ensures hooks fire correctly, adds a new hook for better session management, and makes summarization more robust by preventing failures on old sessions.

Highlights

• Duplicate Hook Fix: The explicit declaration of the hooks.json file in plugin.json has been removed, resolving an issue where the SessionStart hook was firing twice due to auto-discovery loading it again.
• Session End Hook: A new SessionEnd hook has been added to hooks.json to automatically trigger episodic-memory sync when a session closes, ensuring timely synchronization.
• Summarization Reliability: The summarizer now includes a graceful fallback mechanism. If attempting to resume an old or expired session for summarization fails, it will now proceed with text-based summarization instead of failing entirely.
• Documentation: A new ISSUES-AND-FIXES.md file has been added, detailing the duplicate hook and summarization failure issues, their root causes, and the implemented solutions.

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[gemini-code-assist]

Code Review

This pull request effectively resolves two key issues: the duplicate firing of the SessionStart hook and summarization failures for older sessions. The solution for summarization, which introduces a graceful fallback to a text-based approach when a session resume fails, is well-implemented and robust. Additionally, adding a SessionEnd hook to sync conversations is a valuable enhancement. The new ISSUES-AND-FIXES.md documentation is a great addition for project maintainability. I have one suggestion to improve error logging for better debuggability in the future.

[gemini-code-assist]

While the fallback mechanism is great, the catch block currently swallows the error object without logging it. For better debugging, it would be beneficial to log the actual error that was caught. This can help distinguish between expected session expiration errors and other unexpected issues (e.g., network problems, API changes) in the future.

Suggested change

	console.log(` Session resume failed, using text-based summarization`);
	console.log(` Session resume failed, using text-based summarization. Error:`, error);