feat(host): tokenpulse setup command + smarter serial autodetect#4
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- 'tokenpulse setup': one-shot registration into ~/.claude/settings.json. Detects the serial port, wraps the existing statusLine command as TOKENPULSE_INNER (passthrough preserved), backs up settings.json, idempotent (no-op if already configured). Flags: --yes, --serial, --settings. - autodetectSerial now prefers the TokenPulse board (serial 'TP_*') over a bare first /dev/cu.usbmodem* match, so a second usbmodem / ROM JTAG port in download mode isn't grabbed. - Fix Makefile host-install (go install named the binary 'host', not 'tokenpulse'). - README: document setup + autodetect. go test + vet pass; setup verified on a temp settings.json (idempotency + wrap).
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Answers two UX questions about the host tool.
1.
tokenpulse setup— register into settings.jsongo installhas no post-install hook, so "auto-prompt on install" isn't possible — instead, a one-shot command:tokenpulse setup # prompts before writing; --yes / --serial / --settings~/.claude/settings.json, wraps the existingstatusLinecommand asTOKENPULSE_INNER(passthrough preserved), sets statusLine totokenpulse statusline.settings.json→.bakbefore writing.2. Smarter serial autodetect
autodetectSerialalready globbed/dev/cu.usbmodem*and took the first match. Now it prefers the TokenPulse board (device serialTP_*) so a second usbmodem device — or the ROM USB-JTAG port when the board is in download mode — isn't grabbed by mistake. Falls back to first match.Also
Makefilehost-install(go install .named the binaryhost, nottokenpulse; nowgo build -o …/bin/tokenpulse).Verification
go vet+go testpass (new unit tests for buildStatusLineCommand / extract+setStatusLineCommand / autodetect preference / idempotency).setupexercised on a temp settings.json: idempotency (already-configured → no-op, no backup) and fresh wrap (existing command preserved as inner, port filled, permissions intact, backup written).