docs(quartz): measure link vocabulary coverage; the fallback must read tag shapes

EventFactory types 410 classes. The draft classifies about 150, about 110
carry no references, and about 150 carry references but are unclassified.
Only 12 of those implement a hint provider, so a fallback built from hint
providers alone would drop the rest. The REFERENCE default now also reads
generic e/E/q, p/P and a/A tags by shape. A coverage test is planned so that
every EventFactory kind must be classified, REFERENCE-only or link-free.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Pu8Fpp4KbXaiax8YTYxhJm

quartz/plans/2026-09-29-graph-link-vocabulary.md

@@ -66,8 +66,11 @@ Rules the vocabulary follows:
    complaint about the person) is not `REPORTED_AUTHOR` (the author of reported content), and
    `FOLLOW` (the kind 3 social graph) is not `SUBSCRIBED` (every other follow-like list).
 5. **Nothing is invisible before it is classified.** A class that implements no `LinkProvider`
-   gets a default derived from its hint providers: every linked id becomes a `REFERENCE` link
-   with `via` = the tag it came from. Classifying a kind later is an additive change.
+   gets a default `REFERENCE` link (with `via` = the tag it came from) for every id its hint
+   providers name AND every generic reference tag whose value has the right shape: `e`/`E`/`q`
+   with a 64-hex id, `p`/`P` with a 64-hex key, `a`/`A` with a valid address. The shape half is
+   not optional: most kinds Quartz types implement no hint provider (measured below), and without
+   it their references would vanish. Classifying a kind later is an additive change.
 6. **Values that qualify a link ride on it** (`props`): a report's type, an assertion's rank, a
    zap request's amount. They are what a query filters on after choosing the relation.
 7. **Names are Nostr's own words for the slot.** A relation names what the TARGET is to the
@@ -272,9 +275,36 @@ These were already catalogued in neo4j-eventstore's `docs/appendix-providers.md`
 New: two classes claim kind **1010**, `experimental/edits/TextNoteModificationEvent` and
 `nip51Lists/goodWikiRelayList/GoodWikiRelayListEvent`. `EventFactory` can only type one of them.
 
+## Coverage
+
+Measured on 2026-09-29: `EventFactory` types **410** classes. The measurement is a text scan, so
+the split below is approximate; an exact per-class table is plan step 2a.
+- **~150 are classified above.** That covers the NIPs the graph already interprets.
+- **~110 carry no references.** Settings, metadata, relay and server lists, key packages,
+  ephemeral auth. They need nothing beyond `AUTHOR` (and `ADDRESS`).
+- **~150 carry references and are not classified yet.** Only 12 of them implement a hint
+  provider; the rest reach the graph only through the shape half of rule 5. The largest groups:
+  - `buzz/` (~65 kinds: streams, workflows, jobs, huddles, forums, DMs, moderation);
+  - NIP-29 groups (9000–9010, 39000–39005);
+  - NIP-43 and buzz relay membership;
+  - NIP-47 wallet connect and NIP-46 remote signer traffic;
+  - WebRTC calls (25050–25055);
+  - NIP-71 videos (21, 22, 34235, 34236);
+  - file metadata (1063, 1065);
+  - chess (64, Jester);
+  - clink, cashu, contextvm, marmot;
+  - app data and handlers (78, 30078, 31990);
+  - music playlists, interactive stories, attestations, workouts, geocaching, list items
+    (9999 / 39999), torrents (2003).
+
+**Enforced, not hoped for:** a Quartz test walks every `EventFactory` kind and fails unless the
+class is one of: classified (implements `LinkProvider`), explicitly `REFERENCE`-only, or
+explicitly link-free. A new kind then cannot land without a decision about its links.
+
 ## Plan
 
 1. This review: the vocabulary, the model, the open questions. Done except the two open points.
+   - 2a. The exact per-class coverage table (all 410), generated, as an appendix to this plan.
 2. Quartz: `nip01Core/links/` and the default from the hint providers; then `links()` for the
    kinds the graph already interprets (NIP-10, 18, 22, 25, 56, 57, 85, 51, 58, 72, 09), each with
    a golden test. The upstream fixes above land with them.