v1.0.3

Hebbian direction in field observations

Primordial-soup experiment proved: valence-only = 0% agent improvement, valence + Hebbian direction = +27.2%.

FieldScan gains coupled_from field. Capabilities surfaced via Hebbian coupling now show their predecessor:

field: project tool:edit (78% success in this project, follows tool:search)

The field's relational dimension — directed edges discovered through co-excitation — now reaches agents for the first time.

Changes

• pheromone.rs: coupled_from: Option<String> on FieldScan, set in Phase 2 of scan_at_level and scan_with_fallback
• hooks.rs: render_field_observation renders directional info when coupled_from is set
• Backward compatible: existing serialization unaffected via serde(default)