tegwick
714eaf6b5a
Extend the cross-dive synthesis from nine systems to the full fourteen (added Joplin, Logseq, the CRDT cohort Anytype/AFFiNE/AppFlowy, Trilium). Spectra grown 11 -> 13: new merge-model (none/git/conflict-notes/ native-CRDT) and content-opacity (plaintext/whole-shard-E2EE/per-item), plus identity-vs-placement emphasis (Trilium note/branch DAG), Logseq's in-file id:: addressing sweet spot, build-your-own derived query index, and a six-mode attachment taxonomy (file-store native/interchange-mirror, in-engine-host, local-REST, external-API, CRDT-replica, P2P). New through-lines: CRDT changes the merge math; identity != placement; metadata can be computed; attach surface != native store (+ substrate migration). UC fold-in extended UC-44-59 -> UC-44-67. Folded into SHARD-WP-0002: T11 thirteen spectra; T12 computed metadata + multi-placement/DAG identity; T13 CRDT-log supplement; T14 full six-mode attachment taxonomy; T15 HTML source model; T16 identity!=placement + derived index. Context inputs += four dives; acceptance UC-26-67. No new tasks, no new UCs (synthesis only). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
260614 — Shard spectrum synthesis (one capability model across the full dive set)
Date: 2026-06-14 · revised 2026-06-14 (v2)
What this is
A synthesis (no new external research) that reads every studied system across the
others and distills them into a single comparative model feeding the shard adapter
contract (SHARD-WP-0002).
v2 extends from nine systems to the full set and grows the spectra from eleven to thirteen. The systems: two conceptual ancestors (Xanadu, ZigZag), four engines (XWiki, TWiki, Foswiki + the wiki-engines landscape), and the modern note/PKB tools (Roam, Obsidian, Notion, Joplin, Logseq, Anytype, AFFiNE, AppFlowy, Trilium), against the federation/origin research.
Centerpieces:
- The shard family matrix — every candidate backend × {substrate, attach mode(s), addressing, structure, history, merge, query, →Markdown, opacity}, with Xanadu/ ZigZag as the ideal anchors.
- The thirteen capability spectra — the claim that the adapter contract should model positions on spectra, each anchored at both ends by a real system, with federation ops degrading by position. v2 adds content opacity (12th) and merge model (13th), plus emphasis on identity vs placement, and expands the attachment-mode spectrum (file-store native/interchange-mirror, in-engine-host, local-REST, external-API, CRDT-replica, P2P/no-central-endpoint).
- UC-44–UC-67 → workplan task mapping (T11–T16).
Contents
| Path | Role |
|---|---|
findings.md |
Family matrix, the thirteen spectra, cross-cutting through-lines, UC→task fold-in, recommendations/decisions, escalated open questions |
Status
Synthesis v2 complete. No new use cases (consolidation only). Feeds SHARD-WP-0002: T11
reframed around the thirteen spectra (incl. content-opacity + merge-model); T12
page-model breadth (prose + typed/computed records + non-Markdown assets +
query-defined + multi-placement/DAG identity); T13 history (incl. CRDT-log =
supplement); T14 full attachment-mode taxonomy (CRDT-replica + P2P + interchange-mirror
- local-REST added); T15 lossy-with-fidelity-report (incl. HTML); T16 (addressing, content identity, identity≠placement, derived index, dimensional/query). UC coverage extended UC-34–UC-59 → UC-34–UC-67.
New through-lines (v2): CRDT changes the merge math (native merge — never impose git
merge); identity ≠ placement (Trilium note/branch) is the model for multi-location/
multi-shard pages; metadata can be computed (inherited/templated), not just stored;
content opacity is per-item, not only whole-shard; the attach surface is not always the
native store (Joplin sync mirror; Logseq file-vs-DB and its substrate migration); the
block-graph-on-files sweet spot (Logseq id::) resolves the addressing tension.
Carried from v1: files-canonical/index-derived; fine-grained addressing is adoptable;
transclusion=clone=embed is one primitive; structure/history federate iff in-text; attach
mode is per-binding; Notion proves the platform can enforce no-silent-mutation.