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a6e993df25
- Append [Archived Context Summary] to system prompt instead of injecting it into the user message runtime context, improving KV cache reuse across turns and avoiding consecutive same-role messages. - _last_summary persists in metadata (no pop) for restart survival; summary is re-injected every turn via the stable system prompt. - Remove dynamic "Inactive for X minutes" from _format_summary — use static last_active timestamp instead to preserve KV cache stability. - Pass session_summary through build_messages() so both normal and ask_user paths receive the archived summary in the system prompt. - estimate_session_prompt_tokens now reads _last_summary from metadata to include the summary in token budget estimation. - Remove obsolete session_summary parameter from maybe_consolidate_by_tokens and estimate_session_prompt_tokens call sites in loop.py (summary flows through build_messages instead). - Ensure /new (session.clear()) clears _last_summary from metadata.