xhci.c and repl.c's USB attach/detach path printed every xHCI command submission, completion, and BOT transfer step unconditionally via console_println()/console_puts() -- floods the serial log on every boot, regardless of whether anyone is debugging the USB stack. Converted every "xhci:"-prefixed line to log_message() with a level chosen by what it reports, not blanket debug: - LOG_ERROR: allocation/mapping failures, timeouts, command failures, CSW signature/tag mismatches, CSW FAILED/PHASE ERROR, "not implemented" refusals, every "deferred ... setup failed" path - LOG_WARN: dropped/skipped conditions (command ring busy, tracked-port range exceeded), unrecognized media (bad version/CRC), TUR retry - LOG_DEBUG: routine progress (command submitted, succeeded, transfer completed, port connected) and expected outcomes (recognized/blank media) Default log level is LOG_INFO, so the LOG_DEBUG chatter that was the actual complaint is now silent by default and re-enabled with --log-level=debug; LOG_ERROR/LOG_WARN stay visible so real faults aren't buried. xhci_log_hex32() now routes through log_message(LOG_DEBUG, ...) instead of console_puts()/console_println() directly -- kept its own zero-padded 8-digit hex formatting rather than switching to log_message()'s %x (which has no width control), since register values lining up in the log is the reason this helper exists. console.h dropped from xhci.c, no longer used directly. Verified functionally unchanged, not just "still boots": all three architectures reach zuse)ok>, log_message()-instrumented lines are gone from the default-level log (grep -c xhci == 0 on all three, versus dozens before), and the USB thumbdrive path still works end to end -- "Zuse: identity confirmed from attached thumbdrive" appears on all three boots exactly as before. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019YcT3H2PQeyujrzjqS3Var