Reflexion (Learn From Failures via Memory)

What Problem It Solves

When a system fails repeatedly in similar ways, you want it to write lessons and reuse them on retry.

Core Flow

flowchart TD
  A["Attempt"] --> V{"Verify OK?"}
  V -->|yes| O["Return"]
  V -->|no| L["Write lesson"]
  L --> M["Store in memory"]
  M --> A

Evolution Path

• Extends: Maker-Checker/CoVe by persisting lessons across runs
• In production: pair with session memory + evals to prevent regressions

Repo Reference

• Code: src/agent_patterns_lab/patterns/reflexion.py
• Example: examples/42_reflexion.py
• Tests: tests/test_reflexion.py