Phase E: Cognitive Architecture

[DeveshParagiri]

Summary

• Conviction self-awareness: Agents now see their conviction trajectory ("I've been firm about this and getting more certain")
• Repetition detection: When consecutive reasoning is >70% similar (trigram Jaccard), agents get a deepening nudge
• THINK vs SAY: At high fidelity, explicit prompt guidance to separate internal monologue from public statement

Changes

• extropy/simulation/text_utils.py (NEW) - trigram Jaccard similarity utility
• extropy/simulation/reasoning.py - conviction trajectory, repetition nudge, THINK/SAY instructions
• tests/test_text_utils.py (NEW) - 9 unit tests

Fidelity Matrix

Feature	Low	Medium	High
Conviction self-awareness	✅	✅	✅
Repetition detection	✅	✅	✅
THINK vs SAY instructions	❌	❌	✅

Test Plan

• 9 new tests for trigram Jaccard similarity
• 811 total tests passing
• Lint clean

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