skill: add usb-sniffer — wire-level capture with the ataradov hardware tap

Fourth view in the USB debugging toolset (usbmon = host URBs, usb-debug =
host reasoning, usb-target-debug = device firmware, usb-sniffer = what
actually crossed D+/D-). Covers the ataradov/usb-sniffer analyzer:
headless pcapng capture (--speed ls/fs/hs, --fold, --limit self-exit),
Wireshark/tshark analysis recipes, and the wire realities that bite:
downstream broadcast, sniffer self-capture noise, xHCI devnum != wire
address, tap-point-dependent reset visibility (hub choreography anchors),
FS-behind-HS-hub splits. Every recipe hardware-validated on the rig,
including the capture-window floor (a 3 s window provably misses the
enumeration ladder; 3M packets minimum).

Two udev files with distinct audiences, not one:
- examples/device/99-tinyusb-examples.rules (renamed from 99-tinyusb.rules):
  the user-facing rules the examples need — cafe VID access, hidraw, the
  ModemManager blacklist, a couple of board probes. getting_started.rst,
  the webusb_serial README and its source comment point here.
- tools/88-tinyusb.rules: the HIL rig's private probe/analyzer allowlist,
  now with the sniffer (6666:6620 + blank FX2LP 04b4:8613). Installed on
  the rig only; the usb-sniffer skill references it.

1 files changed, 0 insertions, 21 deletions

diff --git a/examples/device/99-tinyusb.rules b/examples/device/99-tinyusb.rules
deleted file mode 100644
index d306bada5..000000000
--- a/examples/device/99-tinyusb.rules
+++ /dev/null
@@ -1,21 +0,0 @@
-# Copy this file to the location of your distribution's udev rules, for example on Ubuntu:
-#   sudo cp 99-tinyusb.rules /etc/udev/rules.d/
-# Then reload udev configuration by executing:
-#   sudo udevadm control --reload-rules
-#   sudo udevadm trigger
-
-# Check SUBSYSTEM
-SUBSYSTEMS=="hidraw", KERNEL=="hidraw*", MODE="0666", GROUP="dialout"
-
-# Rule applies to all TinyUSB example
-ATTRS{idVendor}=="cafe", MODE="0666", GROUP="dialout"
-
-# Rule to blacklist TinyUSB example from being manipulated by ModemManager.
-SUBSYSTEMS=="usb", ATTRS{idVendor}=="cafe", ENV{ID_MM_DEVICE_IGNORE}="1"
-
-# Xplained Pro SamG55 Device
-SUBSYSTEMS=="usb", ATTRS{idVendor}=="03eb", ATTRS{idProduct}=="2111", MODE="0666", GROUP="users", ENV{ID_MM_DEVICE_IGNORE}="1"
-SUBSYSTEMS=="tty", ATTRS{idVendor}=="03eb", ATTRS{idProduct}=="2111", MODE="0666", GROUP="users", ENV{ID_MM_DEVICE_IGNORE}="1"
-
-# TI Stellaris/Tiva-C Launchpad ICDI
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1cbe", ATTRS{idProduct}=="00fd", MODE="0666"