# TNFR Observers — Canonical Module Hub (Single Source of Truth)

English-only hub for observer hooks and telemetry collectors.

- Canonical physics/invariants: `AGENTS.md`
- Grammar: `UNIFIED_GRAMMAR_RULES.md`
- Structural fields: `src/tnfr/physics/README.md`

## Scope
- Observation interfaces, event logging, and metric extraction
