An assignment and a registration each change exactly one key and raise exactly
one event; the same records written again change nothing (hq issue 652, the
package's done-when). Listed as a store test, so the merge check runs it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The writer behind the assignments and declared-config mirrors (hq issue 652,
ADR 0289, design 54 §2-3): filled from the bucket on its first pass, it
compares each value byte for byte, writes by compare-and-set, purges a key
whose record is gone with a marker that lives a day, and says each write once
after it succeeded.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>