preserve hardened USB smoke evidence

docs/transport-layer-validation-2026-08-17.md

@@ -99,3 +99,19 @@ sample gaps/resets, timestamp anomalies, sensor status, saturation flags, drops,
 and acquisition overruns. Sequence classification is wrap-aware. The capture
 tool also accepts `--wire PATH` to preserve every serial byte before parsing,
 including startup text, corrupt frames, and trailing fragments.
+
+For deterministic fresh-session validation, `capture_binary.py --reset` releases
+DTR/RTS, clears the prior input session, then pulses the C3 reset line while the
+same reader remains open. This follows ESP-IDF monitor's USB Serial/JTAG reset
+ordering and avoids a flash-to-capture port-open race.
+
+Commit `73e5680` was built, flashed, and then captured through this reset path.
+The result contains 1,184 contiguous samples, sequences 0 through 1,183, with
+zero packet/sample gaps, resets, CRC failures, reported drops, loop overruns,
+trailing bytes, or timestamp saturation. Raw-wire offline decoding produced CSV
+byte-for-byte identical to live rendering. Both artifacts are tracked:
+
+- `tests/fixtures/direct_usb_73e5680.trk`, SHA-256
+  `fd34bb3bf8f92a64960024f1287e553c03076ff3714fe629ec629bec81ddf821`
+- `tests/fixtures/direct_usb_73e5680.wire`, SHA-256
+  `82d6d17bbf0729e9bfc53f337ec9adf70bcb5e5898b039685eda5dfa19cf4eea`