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.