Jeffrey (Dongkyu) Kim d31157cba3 Reduce N-card number exposure in KTX booking ... Prefer N-card selection by list index so full card numbers are not echoed through JSON output or required in shell history. Keep direct card-number input as a compatibility escape hatch with an explicit warning.\n\nConstraint: PR #231 scope is limited to ktx-booking docs, helper, and tests.\nRejected: Require users to copy full card numbers from ncard-list | exposes sensitive identifiers in logs and shell history.\nConfidence: high\nScope-risk: narrow\nDirective: Keep N-card list outputs masked; prefer index-based selection for future reservation flows.\nTested: python3 -m py_compile scripts/ktx_booking.py scripts/test_ktx_booking.py; PYTHONPATH=scripts python3 -m unittest scripts.test_ktx_booking; npm run lint; npm run typecheck; npm test\nNot-tested: Live Korail N-card reservation; requires real user credentials and owned N-card.		2026-05-12 19:06:27 +09:00
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SKILL.md	Reduce N-card number exposure in KTX booking	2026-05-12 19:06:27 +09:00