- Add KEYFILE_PARAMS_JSON const (same KDF params as default + second_factor:"keyfile" hint)
- Generalize registerDeviceAndPersistConfig: takes factorStorage union instead of
referenceImageBytes Uint8Array; spreads { imageBase64 } or { keyfileBase64 } into
chrome.storage.local.set so exactly one factor key is present
- Branch handleCreateVault on msg.secondFactor === 'keyfile': skip carrier-image
guards and embed_image_secret; call unlock_with_secret + keyfile_encode; share
the file-write / device-registration / session tail with the image path
- Update handleAttachVault call to registerDeviceAndPersistConfig to pass
{ imageBase64: uint8ArrayToBase64(referenceImageBytes) }
- Relax carrierImageBytes to optional in messages.ts create_vault request type
- Skip Task-4 describe block in keyfile-unlock.test.ts (un-skip in Task 4)
TDD: Task-2 test RED → GREEN; Task-4 describe.skipped; full suite 439 passed/1 skipped; build clean
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014THSV6cA4Gxa7bxFfisHBB
5cc16ddffb