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Artifact dc239c22980b90b705398a11fda30e502c1a83d0163eb061d29288b7c25fcb8b:

# Pinned drafts

The conformance suite reads these documents, never edits them. Each is a
byte-for-byte copy of a file under `docs/rfcs/` in the zit repository, taken
from the check-in below. The requirements tables in `../requirements/` pin
each copy by its SHA-256, so a refreshed copy fails the coverage test until
its table has been re-read against it.

The draft text is the authority. Since zit check-in `62a7d1bb3f`
(2026-10-20) every erratum is applied in its draft and zit keeps no
erratum files: each draft records its corrections in its own Changes
appendix ("Changes in This Revision").

Since zit check-in `68a3f76cb7` (2026-10-20) the artifact-format,
repo-state and sync-protocol drafts name themselves `-00` throughout, in
their headers, their cross-references and their reference entries, and the
copies here carry zit's file names. Against the `62a7d1bb3f` text, which
these copies replace, nothing but those names and the wording of the
Changes appendix's heading and introduction differs: no normative text
changed and no section number moved.

| File | zit check-in | zit artifact | SHA-256 |
|---|---|---|---|
| `draft-fossil-artifact-format-00.txt` | `68a3f76cb7` | `aa13f2e42c` | `0887d83d3c57c8b1…` |
| `draft-fossil-repo-state-00.txt` | `68a3f76cb7` | `140fdf2d3b` | `137f0a573498bf27…` |
| `draft-fossil-sync-protocol-00.txt` | `68a3f76cb7` | `62e9495f35` | `2195d9a18fe6bfaa…` |
| `draft-fossil-delta-format-00.txt` | `62a7d1bb3f` | `d8025d6d75` | `6a28ee7e2e146f80…` |
| `draft-fossil-submanifests-00.txt` | `e03d91943e57afa20c3fdeab159a23a8a5eab66c` (branch `horizon-rfc`) | `b9b19fa418` | `99ea094690fe1386…` |
| `draft-fossil-sparse-cone-00.txt` | `e6ee276c89` (branch `horizon-rfc`) | `c7ef80e7e1` | `2ecfc54f4b830938…` |
| `draft-fossil-horizon-00.txt` | `3a2df62515` (branch `horizon-rfc`) | `360f8c9d9b` | `037f9ad4cb1eeed0…` |

The delta-format and sub-manifest files are byte-identical at `68a3f76cb7`
and `62a7d1bb3f`. The delta-format draft is unchanged since `3f86ff4261`
(2026-10-17).

The sub-manifest draft (`draft-fossil-submanifests-00`) includes the sparse
canonical-rewrite correction merged into `horizon-rfc` at the exact check-in
above (2026-10-20). Sections 6.2 and 6.4 require canonical construction under
the requested k, including MAX-cut shifts, final-small-group merges and
propagation at every height. Opaque reuse requires verified compatible
partition evidence, not the mutable setting; missing necessary nodes must
be fetched or cause explicit refusal without a partial check-in. Appendix
A.6 supplies the required MAX, final-merge and different/unknown-k cases.
The earlier Appendix A byte vectors in `../testdata/submanifest/` remain
unchanged: they are zit's `src/rfc_vectors/` copies from `3f86ff4261`, each
with two leading `#` lines that the suite drops.

The sparse-cone and horizon drafts follow zit's `horizon-rfc` branch, where
the horizon draft lives; that branch merges trunk. The sparse-cone copy at
`e6ee276c89` carries the corrections of zit #257 to #260 and #262 (the
cone-served acknowledgement, the empty-cone refusal, structural retention
on compaction and local filtering, and the pull-inventory clarifications)
and retains the branch's §3.1
members-of-other-kinds and §6.2 outside-delta-base corrections. Its §4.2
now requires the complete canonical structural affected range and verified
partition basis, with fetch or explicit refusal when necessary nodes are
absent. Section 5.1 permits outside payloads to be absent but does not
require discarding already-held or demand-fetched payloads; §5.3 follows
the corrected canonical-writing contract. The horizon copy is pinned at
`3a2df62515` (2026-10-22). Against the `9bf7ebfe0f` copy it replaces
(`bbd1435674`, the revision zit's author called ready to implement
against, plus the zit#266 correction to §4.5, which binds the cluster
prohibition to an origin that serves at a horizon and has a clone request
what a horizon-ignorant origin's clusters name) it changes one rule: a
path cone elides sub-manifest nodes under either horizon, as the sparse
store of the sparse-cone draft's §5.1 does. Of the trees the horizon
keeps, every check-in's under a content horizon, only the nodes on paths
into the cone are held and an origin withholds the rest (§3.2, §4.1,
§5.1, §6.2); the derivation reads no node (§4.3); §6.2 states how the
origin's walk is bounded and kept; and §6.2.6 voids a cursor when an
appended tree makes an older withheld node kept. The other six drafts and
the sparse-cone text there are byte-identical at both check-ins. Its
Appendix C lists every change to the earlier text: that rule; the leaves
rule restated over P cards alone, with K closed under descendants
under both rules (§3.1, §3.4); the seed carrying T cards for every entry
of K, not C alone (§5.2.1); the cursor's announcements made only in reply
to a request that pulls (§6.2.6); and, from the revision before, the
cursor itself and the classification-memoization SHOULDs (§6.1, §6.2). The same
branch adds the pragma names these two drafts define (`cone`, `cone-not`,
and the `horizon` family) to the sync draft's §9 list of extension pragmas;
the sync draft here follows trunk, so that addition is pending.