diff --git a/docs/LANES/LANE_B_NOTES.md b/docs/LANES/LANE_B_NOTES.md
index 412d3df..476ad09 100644
--- a/docs/LANES/LANE_B_NOTES.md
+++ b/docs/LANES/LANE_B_NOTES.md
@@ -277,6 +277,19 @@ inferring it from a fetch.
    of hovering over it. And `folded` (the 0.42× X squash that makes the primitive's flight geometry
    sit) is **1 for the GLB**, which is already the perch pose.
 
+3. **THE FETCH IS ARMED BY `createMagpie()`, NOT BY THE IMPORT — and that is the classic covenant.**
+   `index.html` imports this module unconditionally and gates only the *construction*, so
+   `furniture.js`'s module-scope load shape would have put a **brand-new GLB request on the
+   `?classic=1` boot** — a fetch delta on the one boot that is not allowed one. Asserted on the
+   **network log**, not on the code:
+
+| boot | magpie GLB requests | `state.asset` |
+|---|---|---|
+| default (and `?magpie=1`) | **1** | `glb`, 894 tris |
+| `?classic=1` | **0** | *(never constructed)* |
+| `?magpie=0` | **0** | *(never constructed)* |
+| `?noassets=1` | **0** | `primitive`, 182 tris |
+
 **A defect my own edit introduced into ANOTHER LANE'S TOOL, caught by running it.** A module-scope
 `loadGLB` fires GLTFLoader's fetch path under node, and Lane E's `pipeline/dump_bird.mjs` imports this
 module unmodified — `ReferenceError: ProgressEvent is not defined`, E's A/B tool dead, my fault. The