Nightly 2026-08-20 (2nd run): the GGUF import stops paying for the payload twice

README.md

@@ -92,7 +92,10 @@ It exists because two local-first apps — **[laurelane](https://github.com/phys
   in 136.1 s, and layer 5 / expert 37's `gate_proj` read straight from the raw shard bytes is
   **bit-identical to slot 37 of the fused bank across all 2 097 152 values**. The fuse streams to a
   temp file rather than RAM, so a checkpoint this size costs the model's footprint, not the model plus
-  a second copy of itself.
+  a second copy of itself. The **GGUF** path streams the same way: its dequant plans the whole output
+  before reading a payload byte, then writes header + f32 tensors straight to a temp file that
+  `burn-store` mmaps back, so loading the 1B-7B costs **26.5 GB of measured private commit — the model
+  alone** — where the old in-RAM dequant paid for the payload twice on top of it.
 - **All three models are parity-verified** — the two-leg P7 gate passes for Qwen2.5-1.5B on the
   reference GPU: single-forward top-5 logits match a Candle f32 reference (max |Δlogit| 2.7e-5,
   `tests/parity_qwen2.rs` + the committed `tools/candle-probe` fixture) and a 24-token greedy sequence

crates/mummu-bench/tests/budget_moe.rs

@@ -34,7 +34,8 @@ const DECODE_STEPS: usize = 4;
 const LOAD_BUDGET_SECS: f64 = 300.0;
 
 #[test]
-#[ignore = "needs the OLMoE Q4_K_M GGUF (MUMMU_OLMOE_GGUF_PATH) and ~40 GB free RAM"]
+#[ignore = "needs the OLMoE Q4_K_M GGUF (MUMMU_OLMOE_GGUF_PATH), ~30 GB free COMMIT \
+            and ~28 GB of scratch disk beside the gguf"]
 fn olmoe_moe_cpu_decode_stays_inside_its_budget() {
     let Some(path) = std::env::var_os("MUMMU_OLMOE_GGUF_PATH").map(PathBuf::from) else {
         panic!("set MUMMU_OLMOE_GGUF_PATH to the OLMoE-1B-7B q4_k_m gguf");