SolidSnake123/nanochat-corrected-four-capability-mix-20260716-r2

Nanochat Capability Mixture This corpus mixes depo_composition, brevo, world_state, tool_routing with deterministic documents balancing. Training and validation rows only are included; source test rows remain excluded. Exact source manifests are retained under provenance/, and source-aware validation can replay every selected row against the authoritative datasets.