feat: add DGR-001 performance contract

.scratch/distributed-gguf-runtime/issues/01-lock-the-safetensors-versus-gguf-performance-contract.md

@@ -13,6 +13,10 @@ Status: ready-for-agent
 
 As a runtime engineer, I need a controlled baseline so that GGUF work proceeds from measured speed, memory, and quality rather than reputation.
 
+## Baseline model target
+
+Use the smallest *DeepSeek-family* GGUF that still points toward DeepSeek-V4-Flash. Current choice: **DeepSeek-V2-Lite GGUF Q2_K** (~6.5GB, `deepseek2` architecture). Reserve smaller non-DeepSeek fallback models only for loader plumbing smoke tests if needed; they do not count as the DGR-001 architecture-aligned baseline.
+
 ## Expected durable outputs
 
 - Benchmark harness and deterministic tests