Add post-generation similarity check to ThinkingEngine.think_once().
Problem: Timmy's thinking engine generates repetitive thoughts because
small local models ignore 'don't repeat' instructions in the prompt.
The same observation ('still no chat messages', 'Alexander's name is in
profile') would appear 14+ times in a single day's journal.
Fix: After generating a thought, compare it against the last 5 thoughts
using SequenceMatcher. If similarity >= 0.6, retry with a new seed up to
2 times. If all retries produce repetitive content, discard rather than
store. Uses stdlib difflib — no new dependencies.
Changes:
- thinking.py: Add _is_too_similar() method with SequenceMatcher
- thinking.py: Wrap generation in retry loop with dedup check
- test_thinking.py: 7 new tests covering exact match, near match,
different thoughts, retry behavior, and max-retry discard
+96/-20 lines in thinking.py, +87 lines in tests.
Kimi Agent
b30b5c6b57