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hermes - 💡(How to fix) Fix Memory & profile injected identically every turn — propose diff-only on subsequent turns [1 pull requests]

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Problem: Memory and user profile are injected every turn as a frozen snapshot — same ~1,300 tokens, every turn, no way to reduce.

Fix: First turn gets the full snapshot. Subsequent turns inject nothing if unchanged, or only the diff (added/removed/changed entries) if memory was written mid-session. The cost drops from ~1,300 tokens/turn to ~0 for the typical turn where nothing changed.

Currently at: agent/system_prompt.py:304-313 (volatile tier, rebuilt every turn). Config has only binary on/off — no frequency control.

Related: #553 (diff-based injection proposal), #35575 (prefix caching reorder).

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hermes - 💡(How to fix) Fix Memory & profile injected identically every turn — propose diff-only on subsequent turns [1 pull requests]