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thePR0M3TH3ANandClaude Opus 5
51f1358da4
The TUI had a QR action that answered "QR rendering is not available in this
build". The stated reason was that a QR library is not worth a dependency in a
process holding unlocked seeds — which is true, and is why this implements the
encoder instead: byte mode, versions 1-40, all four error-correction levels,
zero dependencies.
A wrong QR code is worse than no QR code. It scans cleanly, yields the wrong
secret, and the user finds out when their 2FA stops working — so this is
verified rather than eyeballed:
- The block-structure table was extracted programmatically from qrcode's
RS_BLOCK_TABLE rather than transcribed. 160 rows of three-number triples
are exactly the kind of data a human copies wrong once and never notices.
- qr.json holds reference matrices from that library, and the tests compare
EVERY module — 10 cases spanning all four EC levels and versions 1 to 17,
including past version 7 where version-information blocks start being
written.
- Generation moved into scripts/generate_ts_port_fixtures.py, so the
fixture-drift CI job proves the committed fixture came from the committed
generator, like every other fixture. Regenerating produced byte-identical
output for all pre-existing fixtures.
Two things are pinned so the comparison is between implementations rather than
between configurations. Byte mode is forced, because the reference
auto-selects alphanumeric for an all-uppercase string — a different encoding
of the same text, not a different answer. And the mask is pinned, because the
two disagree about mask SELECTION: the spec scores the finished symbol, while
the reference scores one with its format modules blanked and its dark module
light (makeImpl(test=True, ...)), which is not a legal symbol. All eight masks
produce valid scannable codes, so the selection rule is checked as a property
instead of reproducing a known quirk to make an equality assertion pass. At a
pinned mask the matrices are identical, which is what establishes that the
data encoding, Reed-Solomon, interleaving, placement, format and version
information are all correct.
In the TUI, TOTP entries encode their otpauth:// URI so an authenticator can
consume them; everything else encodes its own value. Secret Mode suppresses
the code entirely — a QR code is the secret in a form a camera reads from
across a room, so the setting that exists to keep secrets off the screen
applies here more than anywhere — and an entry too large to encode says so
rather than looking unavailable.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01Vtx94nXDmNgXEeThUZP4QN