Check-in [6759506ea8]

clearsign and pgp-command join zit settings as repo-local values fossil never propagates: pgp-command is a command line this machine executes, which fossil classifies sensitive for that reason. Config frame gains shape v4 for the command string; clearsign rides the existing flags byte. Precedence is ZIT_PGP_COMMAND, then the setting, then fossil's default.

zit serve now answers reqconfig for a named group, and clone requests and adopts /shun. A clone that dropped the table would re-accept content its origin was ordered to remove on the next sync with any peer; the #73 scale run also traced 12 spurious phantoms to the same loss. Verified both directions against stock fossil 2.28.

scripts/roundtrip-fossil.sh is the fossil -> zit -> fossil differential, run in CI on a built corpus: zig build e2e can only spawn zit, so nothing in the Zig suite can assert a stock fossil accepts what zit served. check-in: 57a9e0fc6b user: dmestas tags: trunk

frames was the one bulk reader still calling the uncached content(), so a delta base was reconstructed once per referencing delta rather than once per run — superlinear work against a linear stream, on corpora that are ~90% deltas after a fossil import.

libfossil (17,449 artifacts): 12.4s -> 2.34s real, 12.0s -> 2.25s user. Output byte-identical, peak RSS down 362MB -> 314MB. memoize_undeltaed stays off: the sweep reads each artifact once, and bases are memoized regardless of their own frame kind, which is the win. closed check-in: 2e3bb0b9db user: dmestas tags: frames-memo