Unnamed repository; edit this file 'description' to name the repository. http://cgit.235523.xyz/tinyusb.git/atom/docs/superpowers/plans/2026-07-14-usb-target-debug-handoff.md?h=codex%2Fclass-reference-docs 2026-07-17T09:48:00Z 2026-07-17T09:48:00Z hathach thach@tinyusb.org 2026-07-16T07:09:59Z urn:sha1:f5d155256b9e6d743d7c5bd6c7e34e36ae0970df Completes the debugging toolset (usbmon = what the host exchanged, usb-debug = why the host acted, usb-sniffer = what crossed the wire): TU_LOG/RTT capture, per-probe GDB autopsy without reset, RAM ring-buffer event trace, J-Link DWT_PCSR PC-sampling, dual-side capture posture, and board-lock rig discipline. Includes the implementation plan it executes. Hard-won warnings baked in from real bring-up sessions: volatile ring buffers vs -Os dead-store elimination, RTT NO_BLOCK_SKIP post-mortem limits (no overwrite mode exists), DHCSR validity anchors for register snapshots, release-lock-before-hil_test, and that a marginal just-recabled link can fake a deterministic firmware bug. Also ignore .claude/worktrees/.