Post-compaction context includes too much data, causing compaction loop

[blinkagent]

Description

There's a bug with the post-compaction context where sometimes it includes too much data (presumably file edit diffs), causing the chat to enter an essentially endless compaction loop.

Expected Behavior

After compaction, the context should be significantly reduced, allowing normal conversation to continue without immediately triggering another compaction.

Actual Behavior

The post-compaction context sometimes includes excessive data (likely file edit diffs), which keeps the context size high enough to trigger auto-compaction again, resulting in a compaction loop.

Related Work

There have been previous fixes for compaction loops:

• 🤖 fix: prevent compaction infinite loop and stale usage display #886 - Fixed infinite loop caused by message queue overwriting compaction metadata and stale usage display
• 🤖 fix: compaction stream validation and replay blocking #1247 - Fixed compaction stream validation and replay blocking issues

This appears to be a different root cause related to what content is included in the compaction summary.

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Reported via Slack