Schema Drift (I23)

Each harness version is one genome ribbon. Emerald bands are keys that stayed in the envelope. Cyan bands are keys that appeared. Rose hatched gaps are keys that disappeared. Amber bands are keys whose type changed. The amber curve is L1 distance: how far the shape distribution moved between versions.

Click a ribbon or any gene band. The inspector lists added, removed, and retyped keys side by side and lights the same row in the table. This view stores counts. Real key names appear only when a row actually carries them. Drift is not a compatibility verdict. A short sample is insufficient_sample.

Adjacent versions of one harness. Each side needs at least 5 non-refused envelopes.
L1 = Σ |p_later(key, type) − p_earlier(key, type)| over aligned pairs
added = keys present only on the later version
removed = keys present only on the earlier version
retyped = same key, different observed type set
A presence change is not a retype.
No valid pair: status Refused, reason insufficient_sample.
Some short pairs beside a valid pair: status Partial.
Unknown keys never enter the distribution.
Key-path drift is not a compatibility verdict.

Console encoding:
  emerald bands = retained envelope, count derived from 1 − min(L1, 1) when names are absent
  cyan = keys_added, rose hatch = keys_removed, amber = keys_retyped
  the waveform connects each row at x = L1 / 2 across the ribbon

Waiting for rows.