synthesis v2: extend shard spectrum to full dive set (13 spectra); re-fold into SHARD-WP-0002

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>

workplans/SHARD-WP-0002-federation-architecture.md

@@ -8,7 +8,7 @@ status: active
 owner: tegwick
 topic_slug: whynot
 created: "2026-06-08"
-updated: "2026-06-13"
+updated: "2026-06-14"
 depends_on:
   - SHARD-WP-0001
 state_hub_workstream_id: "2af4c46d-cbfd-40ea-a94b-d9e60b0f9945"
@@ -35,12 +35,14 @@ union does*; the adapter contract decides *what a backend must expose to partici
 The two are co-dependent (the capability matrix T10 consumes the contract vocabulary
 T11 defines), so they live in one workplan.
 
-The cross-dive synthesis (`research/260614-shard-spectrum-synthesis/findings.md`)
-reframes the contract around **eleven capability spectra** (addressing, content
-identity, structure, history, native query, translation, attachment mode, operational
-envelope, access grant, write granularity, content types) — positions on a spectrum
-anchored at both ends by a real system, with federation ops degrading by position —
-rather than a flat verb checklist.
+The cross-dive synthesis (`research/260614-shard-spectrum-synthesis/findings.md`, **v2
+2026-06-14** — extended to the full dive set incl. Joplin, Logseq, the CRDT cohort
+Anytype/AFFiNE/AppFlowy, and Trilium) reframes the contract around **thirteen capability
+spectra** (addressing, content identity, **identity-vs-placement**, structure, history,
+**merge model**, native query, translation, attachment mode, operational envelope, access
+grant, **content opacity**, write granularity) — positions on a spectrum anchored at both
+ends by a real system, with federation ops degrading by position — rather than a flat verb
+checklist.
 
 ## Context
 
@@ -63,10 +65,18 @@ rather than a flat verb checklist.
     MetadataCache derived index, dual attach, ecosystem popularity)
   - `research/260614-notion-deep-dive/findings.md` (closed SaaS, external-API-only,
     DB schema+relations, operational envelope, scoped grant)
-  - `research/260614-shard-spectrum-synthesis/findings.md` (**synthesis**: the eleven
+  - `research/260614-joplin-deep-dive/findings.md` (SQLite-local, interchange/sync-mirror
+    attach, E2EE content opacity, local-REST)
+  - `research/260614-logseq-deep-dive/findings.md` (block-graph on plain files, in-file
+    `id::`, derived Datalog index, file→SQLite substrate migration)
+  - `research/260614-localfirst-workspaces-deep-dive/findings.md` (Anytype/AFFiNE/AppFlowy:
+    CRDT substrate, native merge, P2P/E2EE, CRDT-replica attach)
+  - `research/260614-trilium-deep-dive/findings.md` (note cloning → DAG / identity≠placement,
+    inherited+templated computed metadata, HTML-native, scripting+ETAPI, per-item opacity)
+  - `research/260614-shard-spectrum-synthesis/findings.md` (**synthesis v2**: the thirteen
     capability spectra, shard family matrix, UC→task fold-in)
-- Use cases: `spec/UseCaseCatalog.md` § A (UC-26–UC-59; UC-34–UC-43 are the
-  engine-attachment cases, UC-44–UC-59 the conceptual + modern-tool cases)
+- Use cases: `spec/UseCaseCatalog.md` § A (UC-26–UC-67; UC-34–UC-43 are the
+  engine-attachment cases, UC-44–UC-67 the conceptual + modern-tool cases)
 - Aspiration: `INTENT.md` (orchestrator, not engine; mechanism over policy;
   capability-aware adapters; Markdown-first, backend-neutral)
 - Related workplan: `SHARD-WP-0001` (page resolution, namespaces, overlays,
@@ -91,16 +101,16 @@ decision records only.
 | Consensus presets | Spread, merge, designated canonical — policy not core | UC-07, UC-27 |
 | Capability matrix | Which federation ops require which adapter capabilities | UC-02–UC-07 |
 
-### Adapter-contract topics (T11–T15, from engine deep dives)
+### Adapter-contract topics (T11–T16, from engine + modern-tool dives)
 
 | Topic | Key tradeoff | Primary UCs |
 |-------|--------------|-------------|
-| Adapter contract & capabilities | Eleven spectra (not flat verbs); write granularity; operational envelope; access grant | UC-02, UC-35, UC-38, UC-57 |
-| Structured page model | Typed frontmatter vs sidecar vs blob; bodiless / multi-record; DB schema+relations; non-Markdown assets; query-defined pages | UC-34, UC-39, UC-55, UC-58, UC-54 |
-| History portability | Supplement (DB-internal, incl. Notion) vs import (open file history) | UC-36, UC-41 |
-| Adapter binding | Three modes (file-store / in-engine-host / external-API); per-binding choice; backend-swap; scoped grant | UC-38, UC-40, UC-43, UC-50, UC-57 |
-| Syntax translation | Lossless round-trip vs **lossy-with-fidelity-report** vs read-only degradation | UC-42, UC-59, UC-03 |
-| Addressing, identity & navigation (T16) | Span addressing; content identity; transclusion-as-reference; dimensional/query views | UC-44, UC-45, UC-46, UC-47, UC-48, UC-51, UC-52, UC-54 |
+| Adapter contract & capabilities | **Thirteen spectra** (not flat verbs); write granularity; operational envelope; access grant; **merge model**; **content opacity** | UC-02, UC-35, UC-38, UC-57, UC-61, UC-64 |
+| Structured page model | Typed frontmatter vs sidecar vs blob; bodiless / multi-record; DB schema+relations; **computed (inherited/templated) metadata**; non-Markdown assets; query-defined pages; **multi-placement (DAG) identity** | UC-34, UC-39, UC-55, UC-58, UC-54, UC-66, UC-67 |
+| History portability | Supplement (DB-internal incl. Notion/Joplin/Trilium; **CRDT-log**) vs import (open file history) | UC-36, UC-41 |
+| Adapter binding | **Full mode taxonomy**: file-store (native *or* interchange/sync-mirror) / in-engine-host / local-REST / external-API / **CRDT-replica** / **P2P-no-central-endpoint**; per-binding choice; backend-swap / substrate-migration | UC-38, UC-40, UC-43, UC-50, UC-57, UC-60, UC-62, UC-64, UC-65 |
+| Syntax translation | Lossless round-trip vs **lossy-with-fidelity-report** (HTML/blocks/CRDT) vs read-only degradation | UC-42, UC-59, UC-03 |
+| Addressing, identity & navigation (T16) | Span addressing; content identity; **identity≠placement**; transclusion-as-reference; **derived query index**; dimensional/query views | UC-44, UC-45, UC-46, UC-47, UC-48, UC-51, UC-52, UC-54, UC-63, UC-66 |
 
 ---
 
@@ -362,25 +372,32 @@ already separates store backend from core behind a stable interface).
 
 - **Operation verbs:** `read, write, diff, merge, lock, version, publish, notify,
   transclude-source, translate-syntax, structured-payload` (reconcile with T10).
-- **Capability profile = the eleven spectra** (synthesis §2), each a *position* not a
+- **Capability profile = the thirteen spectra** (synthesis v2 §2), each a *position* not a
   boolean, so federation ops degrade by position:
-  1. addressing granularity (none → path → in-file span → store-UUID → portable tumbler)
+  1. addressing granularity (none → path → page-level store id → in-file span → in-file
+     block `id::` → store-UUID → portable tumbler)
   2. content identity (none → path/title → fingerprint → span-set)
-  3. structure (flat MD → frontmatter → %META% → DB objects → DB schema+relations)
-  4. history (none → internal-only → open-file → git-native)
-  5. native query (none → text → datalog → DB query)
-  6. translation (native → lossless → lossy-with-fidelity-report)
-  7. attachment mode (file-store → in-engine-host → external-API)
-  8. operational envelope (local/unbounded → rate-limited/eventually-consistent/paginated)
-  9. access grant (open → token → OAuth scoped+revocable)
-  10. write granularity (whole-file → per-page → per-block)
-  11. content types (Markdown-only → typed records → non-Markdown assets)
+  3. identity vs placement (path=identity → **identity separated from placement**:
+     Trilium note/branch; a page in many locations = a DAG)
+  4. structure (flat MD → frontmatter/`key::` → %META% → typed objects → DB
+     schema+relations → object-graph/ontology → **computed: inherited+templated**)
+  5. history (none → internal-only / **CRDT-log** → open-file → git-native)
+  6. **merge model** (none → git/text → conflict-notes/keep-both → **native-CRDT**)
+  7. native query (none → text → **build-your-own derived index** → datalog/graph → DB query)
+  8. translation (native → lossless → lossy-with-fidelity-report; incl. HTML)
+  9. attachment mode (file-store [native *or* interchange/sync-mirror] → in-engine-host →
+     local-REST → external-API → CRDT-replica → P2P/no-central-endpoint)
+  10. operational envelope (local/unbounded → realtime CRDT/WebSocket → rate-limited/
+      eventually-consistent/paginated)
+  11. access grant (open → token → OAuth scoped+revocable → P2P key/invite)
+  12. **content opacity** (plaintext → encrypted-at-rest whole-shard → **per-item**)
+  13. write granularity (whole-file → per-page/note → per-block)
 - Versioning/compatibility rules for the contract itself; capability discovery
   (static profile vs runtime negotiation).
 
 **Inputs:** `260608-wikiengines-overview` §3, §5; `260613-foswiki-deep-dive` §2, §6;
-`260614-shard-spectrum-synthesis` §2, §5. **Provides** the vocabulary T10's matrix
-consumes. **UCs:** UC-02, UC-35, UC-38, UC-57.
+`260614-shard-spectrum-synthesis` §2, §5 (v2). **Provides** the vocabulary T10's matrix
+consumes. **UCs:** UC-02, UC-35, UC-38, UC-57, UC-61, UC-64.
 
 **Tradeoffs:** Rich capability set (precise degradation) vs contract complexity;
 static profile vs runtime capability negotiation.
@@ -399,8 +416,9 @@ state_hub_task_id: "7334a4a4-ba75-4fac-a8b4-8350d342b299"
 Decide how the **backend-neutral, Markdown-first page model carries structured data
 without flattening**:
 
-The model must stretch **four ways at once** (synthesis §3): prose Markdown, typed
-records, non-Markdown assets, and reference/query-defined pages.
+The model must stretch **many ways at once** (synthesis v2 §3): prose Markdown, typed
+*and computed* records, non-Markdown assets, reference/query-defined pages, and
+**multi-placement (DAG) identity**.
 
 - Source shapes: XWiki XObjects against an XClass; TWiki/Foswiki DataForms stored as
   `%META:FIELD%` in text; Foswiki MetaDataPlugin **multiple records per topic**;
@@ -419,12 +437,22 @@ records, non-Markdown assets, and reference/query-defined pages.
 - **Query-defined / reference pages** (UC-44, UC-54): a page whose canonical form is a
   span manifest (Xanadu EDL) or a saved query (Dataview/Notion linked DB) — coordinate
   with T16.
+- **Computed metadata** (UC-67): Trilium attributes are **inherited (down the tree) +
+  templated**, so effective metadata = own + inherited + templated. Represent
+  **effective-vs-own with per-attribute provenance** (own / inherited-from / template);
+  decide materialize (snapshot) vs compute-live.
+- **Multi-placement / DAG identity** (UC-66): Trilium **note (identity) vs branch
+  (placement)** — a page may occupy several locations at once. Separate **page identity
+  from placement** (one entity, N placements/paths/shards); no single canonical path —
+  coordinate with T16 (the namespace-level clone/reference primitive).
 
 **Inputs:** `xwiki` §2.3; `twiki` §2.3; `foswiki` §4; `notion` §2–§3; `obsidian` §3;
-`shard-spectrum-synthesis` §3. **UCs:** UC-34, UC-39, UC-55, UC-58, UC-54, UC-44.
+`trilium` §2–§3; `localfirst-workspaces` §1–§3; `shard-spectrum-synthesis` §3 (v2).
+**UCs:** UC-34, UC-39, UC-55, UC-58, UC-54, UC-44, UC-66, UC-67.
 
 **Tradeoffs:** Lossless fidelity vs a uniform queryable model; diff/search over
-structured fields vs prose; one coherent model vs four content shapes.
+structured fields vs prose; one coherent model vs many content shapes; effective-vs-own
+metadata snapshot vs live computation.
 
 ---
 
@@ -440,18 +468,22 @@ state_hub_task_id: "6837862a-8f57-410d-9200-a6a5dcf1a7b9"
 Define how the **coordination journal** relates to an engine's native history (aligns
 with and refines T4):
 
-History is a spectrum (synthesis §2): `none → internal-only → open-file → git-native`.
+History is a spectrum (synthesis v2 §2): `none → internal-only / CRDT-log → open-file →
+git-native`.
 
-- **Adopt** — already git-native (Git folder/repo, Obsidian-with-Git): use as-is.
-- **Supplement** — engine history is DB-internal and non-portable
-  (Confluence, MediaWiki, XWiki `xwikircs`, **Notion** internal page history): the
-  journal begins now / mirrors forward (UC-36).
+- **Adopt** — already git-native (Git folder/repo, Obsidian-with-Git, Logseq files): use
+  as-is.
+- **Supplement** — engine history is non-portable: DB-internal (Confluence, MediaWiki,
+  XWiki `xwikircs`, **Notion**, **Joplin/Trilium** revisions) or a **CRDT update log**
+  (Anytype/AFFiNE/AppFlowy): the journal begins now / mirrors forward / snapshots the
+  replica (UC-36).
 - **Import** — engine history is an open file format (TWiki/yawex RCS `.txt,v`,
   Foswiki PlainFile timestamped copies): backfill into Git preserving author/timestamp
   (UC-41).
 - Authoritative journal vs mirror-reconciled-back; one-time vs continuous.
 
-**Inputs:** `xwiki` §2.4; `twiki` §2.1; `foswiki` §2.2; `notion` §4. **UCs:** UC-36, UC-41.
+**Inputs:** `xwiki` §2.4; `twiki` §2.1; `foswiki` §2.2; `notion` §4; `joplin` §1;
+`trilium` §1; `localfirst-workspaces` §4. **UCs:** UC-36, UC-41.
 
 **Tradeoffs:** Import fidelity vs effort; duplicated history vs single source of truth.
 
@@ -468,31 +500,47 @@ state_hub_task_id: "f8835969-d118-4738-952a-5e67e5209f3d"
 
 Decide **how and where an adapter binds to a backend**:
 
-**Three attachment modes** (synthesis §2, §3), with a backend possibly offering more
-than one — so attach mode is a **per-binding, capability-gated choice**, not a fixed
-property:
+**Full attachment-mode taxonomy** (synthesis v2 §2, §3), with a backend possibly
+offering more than one — so attach mode is a **per-binding, capability-gated choice**,
+not a fixed property:
 
-- **File-store direct** — read the on-disk store as a folder shard (Obsidian vault,
-  TWiki `data/`, DokuWiki, Git repo): offline, git-native, but risks inconsistent reads
-  under a running engine (UC-40, UC-53).
-- **In-engine hosted adapter** — adapter runs *inside* the engine via its extension API
-  (XWiki components/REST/UIX; TWiki/Foswiki plugin handlers; **Roam Depot**
-  `onload/onunload` over `roamAlphaAPI`; **Obsidian plugin** over `App.vault`): high
-  fidelity, needs deploy access (UC-38, UC-50).
-- **External-API only** — attach from outside via the backend's REST API, no in-engine
+- **File-store direct** — read the on-disk store as a folder shard, in two sub-kinds:
+  - *native store* — Obsidian vault, **Logseq** `pages/`+`journals/` (with a format
+    profile parsing `id::`/`key::`), TWiki `data/`, Git repo: offline, git-native, but
+    risks inconsistent reads under a running engine (UC-40, UC-53, UC-62).
+  - *interchange / sync mirror* — a tool's documented sync representation on a third-party
+    target (**Joplin** items on WebDAV/Nextcloud/S3): app-independent, read/projection/
+    overlay-mostly (the tool owns the format; never re-sync) (UC-60).
+- **In-engine hosted adapter** — adapter runs *inside* the app via its extension API
+  (XWiki components; TWiki/Foswiki handlers; **Roam Depot** over `roamAlphaAPI`;
+  **Obsidian plugin** over `App.vault`; **Logseq** plugin; **Trilium** scripting code
+  notes): high fidelity, needs deploy access (UC-38, UC-50).
+- **Local-REST** — a localhost API served by the running app (**Joplin** Data API;
+  **Trilium** ETAPI): app-must-run, token auth (UC-38, links UC-57).
+- **External-API only** — attach from outside via a remote REST API, no in-engine
   hosting (**Notion**): full write-through without deploy access, but bounded by the
   **operational envelope** (rate limit, eventual consistency, payload caps) and a
   **scoped, revocable access grant** that enforces no-silent-mutation (UC-57).
-- **Dual attach** — a backend offering several modes (Obsidian: file-store *or* plugin;
-  TWiki: file *or* API): pick per binding; declare which is authoritative (UC-53).
-- **Backend-swap tolerance** — shard identity/provenance survives a storage-format
-  change (Foswiki RCS↔PlainFile; folder→Git) (UC-43).
+- **CRDT replica** — hold a local CRDT replica (**Anytype/AFFiNE/AppFlowy**: any-sync/
+  Yjs/Yrs): the backend merges natively — respect CRDT semantics, don't git-merge; or a
+  self-host sync endpoint (AFFiNE/AppFlowy Cloud) (UC-64).
+- **P2P / no-central-endpoint** — bind a replica or a named peer/node, not a URL
+  (**Anytype** any-sync), content possibly E2EE (UC-65).
+- **Dual / multi attach** — a backend offering several modes (Obsidian/Logseq: file *or*
+  plugin; TWiki: file *or* API; Joplin: mirror *or* Data API): pick per binding; declare
+  which is authoritative (UC-53).
+- **Backend-swap / substrate-migration tolerance** — shard identity/provenance survives a
+  storage change (Foswiki RCS↔PlainFile; folder→Git; **Logseq file→SQLite DB-graph**) —
+  bind to capabilities, not to "it's files" (UC-43).
 
-**Inputs:** `twiki` §5, §6; `xwiki` §3; `foswiki` §2; `roam` §5; `obsidian` §4;
-`notion` §4, §6; `shard-spectrum-synthesis` §3. **UCs:** UC-38, UC-40, UC-43, UC-50, UC-53, UC-57.
+**Inputs:** `twiki` §5–§6; `xwiki` §3; `foswiki` §2; `roam` §5; `obsidian` §4;
+`notion` §4, §6; `joplin` §2, §4; `logseq` §4–§5; `localfirst-workspaces` §4; `trilium`
+§5; `shard-spectrum-synthesis` §3 (v2). **UCs:** UC-38, UC-40, UC-43, UC-50, UC-53,
+UC-57, UC-60, UC-62, UC-64, UC-65.
 
 **Tradeoffs:** Fidelity vs deploy access; consistency vs offline capability; external
-write-through vs rate-limit/eventual-consistency ceiling.
+write-through vs rate-limit/eventual-consistency ceiling; CRDT-replica liveness vs
+snapshot simplicity.
 
 ---
 
@@ -513,18 +561,21 @@ Translation is a spectrum (synthesis §2): `native → lossless → lossy-with-f
   Markdown overlays back via **bidirectional, lossless translation** (UC-42).
 - Feasibility proof: Foswiki **WysiwygPlugin** (TML→HTML for editing, HTML→TML
   losslessly on save).
-- **Lossy-with-fidelity-report** (UC-59) — for proprietary models that do *not*
-  round-trip (**Notion** blocks/rich-text/databases; its own Markdown export is lossy):
-  translate lossily but **make fidelity loss visible** — a per-shard/per-page report of
-  what projects cleanly vs. degrades, with non-mappable elements preserved as
-  provenance/sidecar. Fidelity becomes data (union without erasure). Distinct from the
-  lossless case (UC-42).
+- **Lossy-with-fidelity-report** (UC-59) — for models that do *not* round-trip: **Notion**
+  blocks/rich-text/databases (export is lossy); **Trilium** **HTML** (CKEditor — more
+  tractable than blocks but still lossy); CRDT/object models. Translate lossily but **make
+  fidelity loss visible** — a per-shard/per-page report of what projects cleanly vs.
+  degrades, with non-mappable elements preserved as provenance/sidecar. Fidelity becomes
+  data (union without erasure). Distinct from the lossless case (UC-42).
+- **HTML as a source model** (Trilium) joins TML/Notion-blocks/CRDT in the translation
+  capability — HTML↔Markdown, lossy-aware.
 - **Graceful degradation:** when neither lossless nor acceptable lossy translation is
   available, the shard is a read-only/projection participant (UC-03), never silently
   corrupted.
 - Open: may overlays be stored in Markdown, or must they round-trip in native syntax?
 
-**Inputs:** `foswiki` §5; `twiki` §2.4; `xwiki` §2.5; `notion` §3. **UCs:** UC-42, UC-59, UC-03.
+**Inputs:** `foswiki` §5; `twiki` §2.4; `xwiki` §2.5; `notion` §3; `trilium` §4.
+**UCs:** UC-42, UC-59, UC-03.
 
 **Tradeoffs:** Translation coverage vs read-only floor; Markdown overlays (portable)
 vs native-syntax overlays (safe round-trip); lossy-but-usable vs read-only-but-faithful.
@@ -537,6 +588,7 @@ vs native-syntax overlays (safe round-trip); lossy-but-usable vs read-only-but-f
 id: SHARD-WP-0002-T16
 status: todo
 priority: medium
+state_hub_task_id: "b00ca669-59d6-454a-8d6e-f34694e35192"
 ```
 
 New thread from the conceptual (Xanadu, ZigZag) + modern-tool (Roam, Notion, Obsidian/
@@ -546,28 +598,35 @@ equivalence, and dimensional views depend on. Refines T8 (transclusion/projectio
 and T5 (union composition); consumes T11 capabilities.
 
 - **Span addressing** — a portable sub-page address. Adopt **native span IDs** where the
-  backend mints them (Roam `:block/uid`, Notion UUID) or carries them in-file (Obsidian
-  `^id`); fall back to **content fingerprint** or path+range otherwise. Open: wrap native
-  IDs in a shard-scoped address so they survive projection and don't collide across
-  shards (Xanadu tumbler is the unreached ideal). (UC-51, UC-44.)
+  backend mints them (Roam `:block/uid`, Notion/CRDT UUID, Joplin/Trilium page-level id)
+  or carries them in-file (Obsidian `^id`, **Logseq `id::` — block-level AND git-diffable,
+  the sweet spot**); fall back to **content fingerprint** or path+range otherwise. Open:
+  wrap native IDs in a shard-scoped address so they survive projection and don't collide
+  across shards (Xanadu tumbler is the unreached ideal). (UC-51, UC-44.)
 - **Content identity** — detect that two pages are the same / derived content by
   fingerprint or span-set overlap, **path-independently** — the equivalence mechanism
   UC-27 left open. Enables reverse transclusion (UC-45). (UC-46.)
+- **Identity vs placement** — separate **page identity from placement** (Trilium **note vs
+  branch**: a page cloned into many locations = a DAG). One entity, N placements (paths/
+  shards); no single canonical path — the namespace-level form of the clone/reference
+  primitive. (UC-66, UC-22.)
 - **Transclusion as one reference-not-copy primitive** — unify Xanadu transclusion,
-  ZigZag clone, Roam/Obsidian embed, Notion synced block over the addressable union
-  (synthesis §3). Compose-by-reference pages (UC-44) and reverse lookup (UC-45) are
-  views over it.
+  ZigZag clone, Roam/Obsidian/Logseq embed, Notion synced block, **Trilium note cloning**
+  over the addressable union (synthesis v2 §3). Compose-by-reference pages (UC-44) and
+  reverse lookup (UC-45) are views over it.
 - **Dimensional / query navigation** — model the union so each relationship (namespace,
   genealogy, version, shard, equivalence, links) is a navigable **dimension** (ZigZag),
   and a page can be **query-defined** (Dataview/Notion linked DB, UC-54). **Delegate**
-  view computation to a shard's native query engine where present (Roam Datalog, Notion
-  DB query, XWiki XWQL); else compute over the projection. (UC-47, UC-48, UC-52, UC-54.)
+  view computation to a shard's native query engine where present (Roam/Logseq Datalog,
+  Notion/AppFlowy DB query, XWiki XWQL); **else build a derived index over the
+  projection** (Logseq DataScript-over-files pattern, UC-63). (UC-47, UC-48, UC-52,
+  UC-54, UC-63.)
 - **Boundary:** this is a **derived lens over canonical files+journal**, never a new
   store (ZigZag dive §6); the many-to-many link graph stays a graph index, not a rank.
 
 **Inputs:** `xanadu` §2–§5; `zigzag` §2–§6; `roam` §2–§4, §7; `notion` §2; `obsidian`
-§2–§3; `shard-spectrum-synthesis` §3–§5. **UCs:** UC-44, UC-45, UC-46, UC-47, UC-48,
-UC-51, UC-52, UC-54.
+§2–§3; `logseq` §1–§3; `trilium` §2–§3; `shard-spectrum-synthesis` §3–§5 (v2).
+**UCs:** UC-44, UC-45, UC-46, UC-47, UC-48, UC-51, UC-52, UC-54, UC-63, UC-66.
 
 **Tradeoffs:** Native-ID adoption (cheap, backend-coupled) vs a portable address scheme
 (harder, uniform); core navigation API vs internal organizing concept; query delegation
@@ -580,14 +639,14 @@ UC-51, UC-52, UC-54.
 - `spec/FederationArchitecture.md` exists with all ten federation topic sections
   (T1–T10) and an explicit **decisions / deferred / open** table per topic.
 - The **adapter contract** section of `spec/TechnicalSpecificationDocument.md` exists,
-  populated by T11–T16, with the capability vocabulary (T11, the **eleven spectra**)
+  populated by T11–T16, with the capability vocabulary (T11, the **thirteen spectra**)
   reconciled against the T10 federation-ops matrix.
 - Each decision honors INTENT: mechanism over policy, union without erasure,
   overlay before mutation, no silent remote mutation, shard sovereignty,
   capability-aware adapters, Markdown-first / backend-neutral.
-- UC-26–UC-59 are traceable to architecture / adapter-contract sections
-  (UC-34–UC-43 to T11–T15; UC-44–UC-59 to T11–T16 per
-  `research/260614-shard-spectrum-synthesis/findings.md` §4).
+- UC-26–UC-67 are traceable to architecture / adapter-contract sections
+  (UC-34–UC-43 to T11–T15; UC-44–UC-67 to T11–T16 per
+  `research/260614-shard-spectrum-synthesis/findings.md` §4, v2).
 - Conflicts or dependencies on `SHARD-WP-0001` outputs are listed (e.g.
   namespace model affects equivalent-page identity; page model T12 affects
   resolution/overlays).
@@ -607,7 +666,7 @@ UC-51, UC-52, UC-54.
 
 **Adapter contract (T11–T16)** — can start in parallel with T1; T11 first as it
 frames the rest, and pair it with T10 (shared capability vocabulary):
-7. T11 contract & the eleven capability spectra (frames T12–T16; sync with T10)
+7. T11 contract & the thirteen capability spectra (frames T12–T16; sync with T10)
 8. T12 page model + T13 history portability (parallel; T13 aligns with T4)
 9. T14 binding + T15 syntax translation (parallel)
 10. T16 addressing, identity & navigation (refines T8/T5; finalize adapter-contract spec)