generated from coulomb/repo-seed
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>
56 lines
3.1 KiB
Markdown
56 lines
3.1 KiB
Markdown
# 260614 — Shard spectrum synthesis (one capability model across the full dive set)
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Date: 2026-06-14 · **revised 2026-06-14 (v2)**
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## What this is
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A **synthesis** (no new external research) that reads every studied system *across* the
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others and distills them into a single comparative model feeding the **shard adapter
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contract** (`SHARD-WP-0002`).
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**v2** extends from nine systems to the full set and grows the spectra from eleven to
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**thirteen**. The systems: two conceptual ancestors (**Xanadu, ZigZag**), four engines
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(**XWiki, TWiki, Foswiki** + the wiki-engines landscape), and the modern note/PKB tools
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(**Roam, Obsidian, Notion, Joplin, Logseq, Anytype, AFFiNE, AppFlowy, Trilium**), against
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the federation/origin research.
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Centerpieces:
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- **The shard family matrix** — every candidate backend × {substrate, attach mode(s),
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addressing, structure, history, **merge**, query, →Markdown, **opacity**}, with Xanadu/
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ZigZag as the ideal anchors.
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- **The thirteen capability spectra** — the claim that the adapter contract should model
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*positions on spectra*, each anchored at both ends by a real system, with federation
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ops degrading by position. v2 adds **content opacity** (12th) and **merge model**
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(13th), plus emphasis on **identity vs placement**, and expands the attachment-mode
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spectrum (file-store native/interchange-mirror, in-engine-host, local-REST,
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external-API, CRDT-replica, P2P/no-central-endpoint).
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- **UC-44–UC-67 → workplan task mapping** (T11–T16).
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## Contents
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| Path | Role |
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|------|------|
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| `findings.md` | Family matrix, the thirteen spectra, cross-cutting through-lines, UC→task fold-in, recommendations/decisions, escalated open questions |
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## Status
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Synthesis v2 complete. No new use cases (consolidation only). Feeds `SHARD-WP-0002`: T11
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reframed around the **thirteen spectra** (incl. content-opacity + merge-model); T12
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page-model breadth (prose + typed/**computed** records + non-Markdown assets +
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query-defined + **multi-placement/DAG identity**); T13 history (incl. CRDT-log =
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supplement); T14 **full attachment-mode taxonomy** (CRDT-replica + P2P + interchange-mirror
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+ local-REST added); T15 lossy-with-fidelity-report (incl. HTML); T16 (addressing, content
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identity, **identity≠placement**, derived index, dimensional/query). UC coverage extended
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UC-34–UC-59 → **UC-34–UC-67**.
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**New through-lines (v2):** CRDT changes the merge math (native merge — never impose git
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merge); identity ≠ placement (Trilium note/branch) is the model for multi-location/
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multi-shard pages; metadata can be computed (inherited/templated), not just stored;
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content opacity is per-item, not only whole-shard; the attach surface is not always the
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native store (Joplin sync mirror; Logseq file-vs-DB and its substrate migration); the
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block-graph-on-files sweet spot (Logseq `id::`) resolves the addressing tension.
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**Carried from v1:** files-canonical/index-derived; fine-grained addressing is adoptable;
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transclusion=clone=embed is one primitive; structure/history federate iff in-text; attach
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mode is per-binding; Notion proves the platform can enforce no-silent-mutation.
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</content>
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