Add live GPS momentum weights

docs/compaction-handoff.md

@@ -2,6 +2,32 @@
 
 Current date/time context: 2026-06-27, local timezone America/Chicago.
 
+## 2026-06-27 Live Momentum Knob Installed
+
+- Installed a new telemetry/control DLL at about `03:21` local while the game was
+  cold. Installed size: `16899519` bytes.
+- Active installed config:
+  `solver_weights.bin = 1.0` and `momentum_weights.bin = 8.0`.
+- The plugin log beside the DLL was truncated to zero after install:
+  `red4ext/plugins/EdgeWeightGPS/EdgeWeightGPS.log`.
+- `momentum_weights.bin` is one little-endian `float32`, hot-polled every
+  500 ms. `0.0` disables the fixed ordinary-edge penalty; `8.0` is the current
+  prototype; larger values are stress tests. Presets are in
+  `presets/momentum/` and can be written live with
+  `python3 tools/write_momentum_weights.py <preset>`.
+- New presets:
+  `vanilla=0.0`, `mild=4.0`, `default=8.0`, `strong=16.0`,
+  `silly=80.0`, `pathological=250.0`.
+- The `gps-momentum-summary` line now waits for a nonzero result route-record
+  count before marking a query as summarized. It should report
+  `gpsResultRouteCount` directly instead of showing `0` from the staging fetch.
+- Build verification passed:
+  `toolbox run -c 2077 ./tools/build_red4ext_shim.sh`.
+- Next test should start with current `momentum=8.0`, then while the game is
+  open switch to `vanilla` and `silly` on one or two fixed routes to confirm
+  live A/B behavior. Good candidates from the last run: The Damned/Dogtown
+  pathological route and the SW Badlands fuel station route.
+
 ## 2026-06-27 Momentum Telemetry Test Installed
 
 - Installed telemetry DLL at about `03:04` local while the game was cold.