WIP: open/subscribe repos before anchored cold-start reads (branche, non mergée)

Défaut visé : sur une session verifier fraîche (reconnexion), la lecture ancrée
tape des repos pas encore ouverts dans self.repos → 0 ligne. Nouveau module
`open-repo.ts` : `ensureReposOpen`/`ensureRepoOpen` ouvrent/souscrivent un repo
via la primitive existante `subscribeDoc` (doc_subscribe) et attendent le push
d'état initial (borné, sans polling) AVANT la lecture ancrée. Câblé en amont de
`readUnion` (read-model) et `readScopeIndex` (store-registry). Idempotent par
session (Set des NURI ouverts + Map in-flight ; ré-ouverture si la session
injectée change). No-op si le `ng` injecté n'a pas doc_subscribe (fake unitaire).

État — NON MERGÉ, incomplet :
- AIDE le PROTECTED : la participation remonte au cold-start (mesuré app, timing
  un peu bruité).
- N'ADRESSE PAS l'accueil PUBLIC : `readScopeIndex` de l'index public rend 0 même
  côté écrivain même-session — le fix ouvre le repo mais l'index reste vide. Le
  code d'index lib est prouvé scope-symétrique, donc la cause du public est
  ailleurs (broker/store ou chemin app), À MESURER SOUS BROKER (actuellement
  injoignable). Nécessité du fix elle-même non prouvée en e2e lib (broker down).

gate broker-indépendant : tsc --noEmit propre ; bun test 91 pass (worker).
Inclut le scaffolding e2e de repro reconnexion (broker/run/sdk-entry).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/client/e2e/broker.ts

@@ -13,6 +13,7 @@ import { chromium, type BrowserContext, type Page, type Frame } from "playwright
 import { execSync } from "node:child_process";
 import * as http from "node:http";
 import * as fs from "node:fs";
+import * as os from "node:os";
 import * as path from "node:path";
 import { fileURLToPath } from "node:url";
 
@@ -139,6 +140,46 @@ export async function launchWalletContext(): Promise<BrowserContext> {
   });
 }
 
+/**
+ * Launch a persistent context on a FRESH, EMPTY profile dir (its own userDataDir).
+ * Empty local storage ⇒ empty verifier repo cache ⇒ the reconnection cold-start:
+ * the same wallet's repos are on the broker but NOT in this profile's IndexedDB, so
+ * a session over it starts with an empty `self.repos`. Caller must import the wallet
+ * (see {@link importWalletViaFile}) before opening the SDK page. Returns the context
+ * and the dir so the caller can clean it up.
+ */
+export async function launchCleanProfileContext(): Promise<{ ctx: BrowserContext; dir: string }> {
+  const dir = fs.mkdtempSync(path.join(os.tmpdir(), "ng-eventually-clean-"));
+  const ctx = await chromium.launchPersistentContext(dir, {
+    headless: true,
+    executablePath: resolveChromePath(),
+    args: LAUNCH_ARGS,
+  });
+  return { ctx, dir };
+}
+
+/**
+ * Import a `.ngw` wallet FILE into the current (clean) profile via the standalone
+ * nextgraph.eu "Import a Wallet File" flow, then unlock it with the password. After
+ * this the profile holds the wallet — but NOT the repos' local cache — so the next
+ * SDK session over it hits the broker-only cold-start. Adapted from the Festipod
+ * app's `importWalletViaFile` (the proven real-broker wallet-file import).
+ */
+export async function importWalletViaFile(page: Page, ngwPath: string): Promise<void> {
+  await page.goto("https://nextgraph.eu/#/wallet/login", { waitUntil: "domcontentloaded" });
+  // Let the SPA render + attach the file input (uploading too early → EncryptionError).
+  await page.waitForTimeout(3000);
+  await page.locator('input[type=file]').waitFor({ state: "attached", timeout: 15000 });
+  await page.setInputFiles('input[type=file]', ngwPath);
+  const passwordInput = page.locator('input[type=password]').first();
+  await passwordInput.waitFor({ state: "visible", timeout: 15000 });
+  await passwordInput.fill(WALLET_PASSWORD);
+  await passwordInput.press("Enter");
+  const confirm = page.getByRole("button", { name: /Confirm/i });
+  if (await confirm.isVisible({ timeout: 2000 }).catch(() => false)) await confirm.click().catch(() => {});
+  await page.waitForTimeout(8000); // unlock + verifier bootstrap from the broker
+}
+
 /**
  * Navigate through the broker (nextgraph.net redirect) to load `appUrl` in the
  * broker iframe; unlock the dedicated wallet if a login is shown; return the app

packages/client/e2e/run.ts

@@ -12,12 +12,17 @@
  * (waitForFunction on a counter), never a blind sleep.
  */
 
+import * as fs from "node:fs";
+import * as os from "node:os";
+import * as path from "node:path";
 import type { Frame, Page, BrowserContext } from "playwright";
 import {
   buildBundle,
   serveHarness,
   ensureWallet,
   launchWalletContext,
+  launchCleanProfileContext,
+  importWalletViaFile,
   setupBrokerPage,
 } from "./broker";
 
@@ -280,6 +285,80 @@ async function main(): Promise<void> {
       const cleared = await sdk<string | null>(frame, "identityClear");
       check("IdentityStore set→get→clear", setr === "@ident-user" && got === "@ident-user" && cleared === null, `set=${setr} get=${got} cleared=${cleared}`);
     });
+
+    // ── reconnection cold-start (real-broker regression) ─────────────────────
+    // Phase 1 (THIS session): seed — create a per-entity doc under (id, protected)
+    // and write a marker triple (`protected` carries participations). Also EXPORT the
+    // wallet `.ngw` so phase 2 can re-import the SAME wallet into a CLEAN browser
+    // profile.
+    //
+    // Phase 2 (the faithful reconnect): import the wallet into a BRAND-NEW empty
+    // profile dir (no local IndexedDB copy of the repos) and open a fresh SDK session
+    // over it — the repos exist on the BROKER but NOT in this profile's local cache,
+    // so this is a true reconnect (not a same-profile relaunch, which masks the gap by
+    // eagerly rehydrating repos from local storage). Then re-read purely from the
+    // wallet and assert the marker comes back.
+    //
+    // FINDING (recorded, see the digest): on THIS SDK/broker version the marker also
+    // comes back WITHOUT the open-before-read heal — the broker-login bootstrap opens
+    // the user's repos before the read (the `rawAnchoredNoOpen` detail below shows the
+    // bare anchored query already resolves rows). So this test is a real-broker
+    // REGRESSION guard for reconnection reads, NOT a fail-without-the-fix proof; the
+    // cold-start the fix targets was diagnosed in the app and does not reproduce
+    // through this harness's login path.
+    console.log("\n── reconnection cold-start (real-broker regression) ──");
+    await step("fresh session (clean profile, same wallet) re-reads a persisted entity doc", async () => {
+      const reconId = "@recon-" + Date.now();
+      const scope = "protected";
+      const seed = await sdk<any>(frame, "reconnectSeed", reconId, scope);
+      check(
+        "seed: entity doc created + listed in the seeding session",
+        seed.listedInSeed.includes(seed.entityNuri),
+        `entity=${String(seed.entityNuri).slice(0, 24)}… listedInSeed=${seed.listedInSeed.length} origSession=${info?.session_id}`,
+      );
+
+      // Export the wallet file and materialize it for the clean-profile import.
+      const exp = await sdk<any>(frame, "exportWalletFile");
+      const ngwPath = path.join(os.tmpdir(), `ng-eventually-recon-${Date.now()}.ngw`);
+      fs.writeFileSync(ngwPath, Buffer.from(exp.b64, "base64"));
+
+      let cleanCtx: BrowserContext | null = null;
+      let cleanDir: string | null = null;
+      let cleanPage: Page | null = null;
+      try {
+        const launched = await launchCleanProfileContext();
+        cleanCtx = launched.ctx;
+        cleanDir = launched.dir;
+        cleanPage = await cleanCtx.newPage();
+        cleanPage.on("pageerror", (e) => console.error("[iframe error:clean]", e.message));
+        cleanPage.on("console", (m) => { if (m.type() === "error") console.error("[iframe console:clean]", m.text()); });
+
+        // Import the SAME wallet into the empty profile (broker-only repos), then open
+        // the SDK page in a fresh broker session over it.
+        await importWalletViaFile(cleanPage, ngwPath);
+        const cleanFrame = await setupBrokerPage(cleanPage, url);
+        await cleanFrame.waitForFunction(() => (window as any).__sdk !== undefined, { timeout: 30000 });
+        await cleanFrame.waitForFunction(() => (window as any).__sdk.status() === "connected", { timeout: 60000 });
+        const cleanInfo = await sdkGet<any>(cleanFrame, "sessionInfo");
+        check(
+          "clean-profile session connected (fresh verifier, broker-only repos)",
+          cleanInfo?.session_id !== undefined && cleanInfo?.session_id !== null,
+          `session=${cleanInfo?.session_id}`,
+        );
+
+        const r = await sdk<any>(cleanFrame, "reconnectRead", reconId, scope, seed.entityNuri, seed.marker);
+        check(
+          "fresh clean-profile session re-reads the persisted marker (reconnection regression)",
+          r.markerPresent === true,
+          `rawAnchoredNoOpen=${r.rawRowCount} listed=${r.listedCount} foundEntity=${r.foundEntity} subjects=${r.subjectCount} markerPresent=${r.markerPresent}`,
+        );
+      } finally {
+        try { if (cleanPage) await cleanPage.close(); } catch { /* ignore */ }
+        try { if (cleanCtx) await cleanCtx.close(); } catch { /* ignore */ }
+        try { if (cleanDir) fs.rmSync(cleanDir, { recursive: true, force: true }); } catch { /* ignore */ }
+        try { fs.rmSync(ngwPath, { force: true }); } catch { /* ignore */ }
+      }
+    });
   } finally {
     try { if (page) await page.close(); } catch { /* ignore */ }
     try { if (ctx) await ctx.close(); } catch { /* ignore */ }

packages/client/e2e/sdk-entry.ts

@@ -70,7 +70,11 @@ configureStoreRegistry({
   // The registry (+ subscribe/inbox/discovery/read-model) reach the session
   // through this. It resolves once the broker connects.
   getSession: async () => {
-    const s = await sessionReady;
+    // Read the CURRENT session (mutable): a fresh session (session_stop+session_start
+    // for the reconnection cold-start test) swaps `session` in place, and the SDK must
+    // route reads/opens through the NEW session_id. Fall back to the first-connect
+    // promise until the initial session lands.
+    const s = session ?? (await sessionReady);
     return {
       sessionId: s.session_id,
       privateStoreId: s.private_store_id,
@@ -107,6 +111,23 @@ const identity = new IdentityStore(
         }
       : null,
 
+  /**
+   * Export the CURRENT wallet as a `.ngw` file, base64-encoded so it can cross the
+   * frame.evaluate bridge back to Node. Used by the reconnection cold-start test to
+   * re-import the SAME wallet into a CLEAN browser profile (empty local repo storage)
+   * — the only faithful way to force the broker-only cold-start (a fresh profile has
+   * no local IndexedDB copy of the repos to eagerly rehydrate).
+   */
+  async exportWalletFile() {
+    const ws = await (realNg as any).get_wallets();
+    const walletName = Object.keys(ws ?? {})[0];
+    const file = await (realNg as any).wallet_get_file(walletName);
+    const bytes = file instanceof Uint8Array ? file : new Uint8Array(file);
+    let bin = "";
+    for (let i = 0; i < bytes.length; i++) bin += String.fromCharCode(bytes[i]!);
+    return { walletName, b64: btoa(bin), len: bytes.length };
+  },
+
   // ── docs primitives ──────────────────────────────────────────────────────
   async docCreate() {
     const s = await sessionReady;
@@ -443,6 +464,84 @@ const identity = new IdentityStore(
       leaksB: listA.includes(dB1),
     };
   },
+  /**
+   * RECONNECTION cold-start seed (phase 1, run in the FIRST session).
+   *
+   * Create a per-entity document under (id, scope) — which also appends its NURI to
+   * the account's scope-index document — and write a marker triple INTO the entity
+   * doc (anchored default graph, the canonical shape). Poll until listMyEntityDocs
+   * sees it, so the index append has actually landed on the broker before we tear
+   * the session down. Returns everything the FRESH session needs to re-find it
+   * purely from the persistent wallet: only `id` + `scope` are load-bearing (the
+   * fresh session re-resolves the account from the shim); entityNuri/marker are the
+   * expected values to assert against.
+   */
+  async reconnectSeed(id: string, scope: "public" | "protected" | "private") {
+    storeRegistry.resetRegistryCache();
+    const s = await sessionReady;
+    const entityNuri = await storeRegistry.createEntityDoc(id, scope);
+    const marker = "recon-" + Date.now();
+    await docs.sparqlUpdate(
+      s.session_id,
+      `INSERT DATA { <urn:e2e:recon:subject> <urn:e2e:recon:marker> "${marker}" }`,
+      entityNuri,
+    );
+    // Wait until the index append + the triple are visible in THIS session (the
+    // session that created them — where the repos are already open), so we know the
+    // data is persisted before the fresh session tries to read it back.
+    let listed: string[] = [];
+    for (let i = 0; i < 15; i++) {
+      storeRegistry.resetRegistryCache();
+      listed = await storeRegistry.listMyEntityDocs(id, scope);
+      if (listed.includes(entityNuri)) break;
+      await new Promise((r) => setTimeout(r, 1000));
+    }
+    return { id, scope, entityNuri, marker, listedInSeed: listed };
+  },
+  /**
+   * RECONNECTION read (phase 2, run in a FRESH session over the SAME wallet). First a
+   * DIAGNOSTIC raw anchored read with NO open (rawRowCount), then re-resolve the
+   * account's entity docs of `scope` (listMyEntityDocs → readScopeIndex) and readUnion
+   * them, purely from the persistent wallet — nothing from phase 1's session state
+   * carries over. The SDK's open-before-read heal (open-repo.ts) opens each repo via
+   * doc_subscribe before the anchored reads. NB: on the SDK/broker version tested here
+   * the broker-login bootstrap already opens the user's repos, so rawRowCount is
+   * non-zero even without the heal — this is a reconnection REGRESSION guard, not a
+   * fail-without-the-fix proof (see run.ts's reconnection step comment).
+   */
+  async reconnectRead(id: string, scope: "public" | "protected" | "private", entityNuri: string, marker: string) {
+    // DIAGNOSTIC: a RAW anchored read of the entity doc with NO open at all, first
+    // thing in the fresh session — reports how many rows the bare anchored query
+    // resolves for a not-yet-opened repo (the premise: 0 until opened). Uses the
+    // low-level docs primitive directly, bypassing readUnion's open step.
+    const s = session ?? (await sessionReady);
+    let rawRowCount = -1;
+    try {
+      const raw: any = await docs.sparqlQuery(s.session_id, "SELECT ?s ?p ?o WHERE { ?s ?p ?o }", undefined, entityNuri);
+      rawRowCount = Array.isArray(raw) ? raw.length : (raw?.results?.bindings?.length ?? 0);
+    } catch (e: any) {
+      rawRowCount = -2; // threw (e.g. RepoNotFound / InvalidNuri)
+    }
+
+    storeRegistry.resetRegistryCache();
+    const listed = await storeRegistry.listMyEntityDocs(id, scope);
+    const subjects = await readModel.readUnion(listed.length ? listed : [entityNuri]);
+    const markers: string[] = [];
+    for (const subj of subjects) {
+      for (const vals of Object.values(subj.props)) {
+        for (const v of vals) markers.push(v);
+      }
+    }
+    return {
+      rawRowCount,
+      listed,
+      listedCount: listed.length,
+      foundEntity: listed.includes(entityNuri),
+      subjectCount: subjects.length,
+      markerPresent: markers.includes(marker),
+      markers,
+    };
+  },
   async scopeResolvers() {
     const priv = await storeRegistry.resolveScopeGraph("private");
     const prot = await storeRegistry.resolveScopeGraph("protected");

packages/client/src/open-repo.ts

@@ -0,0 +1,158 @@
+/**
+ * open-repo — cold-start repo opening for the ANCHORED read path (polyfill-era).
+ *
+ * ── The cold-start defect this heals ──────────────────────────────────────
+ * The anchored read path (`read-model.ts` `readDoc`, `store-registry.ts`
+ * `readScopeIndex`) assumes the target repo is already in the verifier's
+ * `self.repos` — true within the session that CREATED the doc (every `doc_create`
+ * opens it), but FALSE on a FRESH session over the same persistent wallet
+ * (reconnection / new page / re-login). On that fresh session nothing has opened
+ * the user's scope-index or entity repos yet, so an anchored `sparql_query`
+ * resolves a repo absent from `self.repos` and silently returns 0 rows (never a
+ * `RepoNotFound`) — persisted documents read as empty.
+ *
+ * The circularity that made this self-inflicted: `doc_subscribe` WOULD open the
+ * repo, but the reactive layer only subscribes AFTER the listing produced NURIs —
+ * and the listing (`readScopeIndex`) is itself an anchored read of a not-yet-open
+ * index repo → 0 rows → nothing to subscribe → nothing ever opens. Verified fix
+ * (adversarial pass): on a fresh session, `doc_subscribe(<docNuri>)` THEN the
+ * anchored re-read returns the data. So we OPEN the repo before the anchored read.
+ *
+ * ── How we open ───────────────────────────────────────────────────────────
+ * We reuse the existing per-document primitive {@link subscribeDoc} (the typed
+ * wrapper over the platform's `doc_subscribe`) — NOT a parallel channel. The
+ * subscribe pushes the repo's initial `State` once it is opened/loaded; we await
+ * that first push (bounded) and treat it as "the repo is now in the session". The
+ * subscription is kept ALIVE for the whole session (that is what keeps the repo
+ * open) — it is a bootstrap open, distinct from any reactive subscription a caller
+ * later establishes for change signals.
+ *
+ * ── Idempotence / perf (once per session, no polling) ─────────────────────
+ * The registry opens each repo at most ONCE per session: `opened` records completed
+ * opens (a hit skips everything), `inFlight` de-dupes concurrent opens of the same
+ * repo. A brand-new page / module instance starts with an empty registry; and when
+ * the injected session id CHANGES within the same page (an in-page re-login /
+ * `session_stop`+`session_start`, whose new verifier has an empty `self.repos`) the
+ * registry auto-resets (`syncSession`) so repos are re-opened against the new session
+ * rather than wrongly skipped as "already open". No polling: we wait on the
+ * initial-state push, with a bounded fallback timeout so a missing push can't hang.
+ *
+ * ── Migration ─────────────────────────────────────────────────────────────
+ * At the real multi-store migration this becomes "open the user's store repo by
+ * cap" (a native broker fetch) done once at bootstrap; the anchored read then
+ * resolves a same-session repo directly. Polyfill-era, removed with the shim.
+ */
+
+import { getConfig, getStoreRegistryDeps } from "./polyfill";
+import { subscribeDoc, type Unsubscribe } from "./subscribe";
+import type { Nuri } from "./types";
+
+/** Repos whose bootstrap open has completed (initial state pushed or timed out). */
+const opened = new Set<Nuri>();
+/** In-flight opens, so concurrent `ensureRepoOpen(nuri)` share one subscription. */
+const inFlight = new Map<Nuri, Promise<void>>();
+/** Live bootstrap subscriptions, kept for the session (this is what holds repos open). */
+const held = new Map<Nuri, Unsubscribe>();
+/** The session id the current `opened`/`held` entries belong to. A change means a
+ *  new verifier session (fresh `self.repos`) → the registry must be invalidated. */
+let boundSessionId: string | number | null = null;
+
+/**
+ * Max wait (ms) for the initial-state push before proceeding with the read anyway.
+ * The push normally lands quickly once the repo loads; the timeout only guards the
+ * pathological case (a doc that never pushes), so a read is never blocked forever —
+ * it just proceeds (and yields 0 rows, exactly as before, for a genuinely-absent doc).
+ */
+const OPEN_TIMEOUT_MS = 8000;
+
+/** Reset the open registry (mainly for tests / a switched wallet). Tears down the
+ *  held bootstrap subscriptions so a subsequent open re-subscribes cleanly. */
+export function resetOpenedRepos(): void {
+  for (const unsub of held.values()) {
+    try {
+      unsub();
+    } catch {
+      /* ignore */
+    }
+  }
+  opened.clear();
+  inFlight.clear();
+  held.clear();
+  boundSessionId = null;
+}
+
+/**
+ * Invalidate the registry if the active session id changed since it was populated.
+ * A new session id means a new verifier with an EMPTY `self.repos`, so entries from
+ * the previous session must NOT suppress re-opening under the new one. Tolerant: if
+ * the session can't be resolved, keep the current registry (best effort).
+ */
+async function syncSession(): Promise<void> {
+  let sid: string | number | null = null;
+  try {
+    sid = (await getStoreRegistryDeps().getSession()).sessionId;
+  } catch {
+    return; // no session deps wired (unit fake path) — nothing to invalidate against
+  }
+  if (boundSessionId !== null && boundSessionId !== sid) resetOpenedRepos();
+  boundSessionId = sid;
+}
+
+/**
+ * Ensure `nuri`'s repo is OPEN in the current session before an anchored read,
+ * so the cold-start (fresh session, same persistent wallet) resolves it instead
+ * of returning 0 rows. Opens via {@link subscribeDoc} and awaits the initial state
+ * push (bounded). Idempotent: a repo already opened (or in flight) is not re-opened.
+ *
+ * Tolerant by construction: if the injected `ng` exposes no `doc_subscribe` (e.g.
+ * the fake `ng` in the unit suite), this is a no-op — the read proceeds unchanged.
+ * Never throws; a failed open just leaves the read to behave as it did before.
+ */
+export async function ensureRepoOpen(nuri: Nuri): Promise<void> {
+  if (!nuri) return;
+  // Drop the registry if the session changed (in-page re-login → fresh verifier).
+  await syncSession();
+  if (opened.has(nuri)) return;
+  const pending = inFlight.get(nuri);
+  if (pending) return pending;
+
+  // No reactive primitive on the injected ng (fake-ng unit suite): nothing to open.
+  const ng = getConfig().ng as { doc_subscribe?: unknown };
+  if (typeof ng.doc_subscribe !== "function") {
+    opened.add(nuri);
+    return;
+  }
+
+  const p = (async () => {
+    await new Promise<void>((resolve) => {
+      let settled = false;
+      const done = (): void => {
+        if (settled) return;
+        settled = true;
+        resolve();
+      };
+      // The bootstrap subscription is kept ALIVE for the session — holding it open
+      // is the whole point; we resolve on the FIRST push (the initial State), which
+      // means the repo is now loaded in the session.
+      const unsub = subscribeDoc(nuri, () => done());
+      held.set(nuri, unsub);
+      // Bounded fallback: proceed even if no push arrives (a genuinely-absent doc
+      // reads 0 rows anyway — same as before — never a hang). NO polling.
+      setTimeout(done, OPEN_TIMEOUT_MS);
+    });
+    opened.add(nuri);
+    inFlight.delete(nuri);
+  })();
+  inFlight.set(nuri, p);
+  return p;
+}
+
+/**
+ * Open a SET of repos before an anchored batch read, in parallel, each tolerant
+ * ({@link ensureRepoOpen} never throws). Empty / falsy entries are ignored.
+ */
+export async function ensureReposOpen(nuris: Nuri[]): Promise<void> {
+  const unique = [...new Set(nuris.filter(Boolean))];
+  if (unique.length === 0) return;
+  await Promise.all(unique.map((n) => ensureRepoOpen(n)));
+}

packages/client/src/read-model.ts

@@ -43,6 +43,7 @@
 
 import { docCreate, sparqlUpdate, sparqlQuery } from "./docs";
 import { getCaps, getCurrentUser, getStoreRegistryDeps } from "./polyfill";
+import { ensureReposOpen } from "./open-repo";
 import { assertNuri } from "./sparql";
 import type { Nuri } from "./types";
 
@@ -88,11 +89,13 @@ async function sessionId(): Promise<string> {
  * This is O(1) in the doc's own size and independent of the rest of the (possibly
  * bloated / shared) session store — it never iterates other graphs.
  *
- * All same-session repos (every doc `doc_create`d this session — in the mono-wallet
+ * COLD-START (fresh session, same persistent wallet): the repo is NOT in
- * polyfill, all of them) are already in `self.repos`, so the anchored query resolves
+ * `self.repos` until something opens it, and an anchored query against an unopened
- * the repo directly with no separate open. A genuinely-absent repo throws
+ * repo silently returns 0 rows (never `RepoNotFound`). {@link readUnion} therefore
- * `RepoNotFound` here, in isolation, and the doc is skipped — never aborting the
+ * opens the batch's repos ({@link ensureReposOpen}) BEFORE this read runs, so the
- * others (unlike the ORM fan-out). Returns the doc's rows, or `[]` on failure.
+ * anchored query resolves a same-session repo directly. A genuinely-absent repo
+ * still yields `[]` (in isolation, never aborting the others). Returns the doc's
+ * rows, or `[]` on failure.
  *
  * At the real multi-store migration this becomes a real sync: opening a per-user
  * store repo by cap is a native broker fetch (`verifier.rs:1423` `OpenRepo` TODO).
@@ -137,6 +140,13 @@ export async function readUnion(docs: Nuri[]): Promise<UnionSubject[]> {
   const unique = [...new Set(docs.filter(Boolean))];
   if (unique.length === 0) return [];
 
+  // COLD-START heal (polyfill-era): on a fresh session over a persistent wallet the
+  // target repos are not yet in `self.repos`, so an anchored read would return 0
+  // rows. Open/subscribe each repo ONCE (idempotent, per session) and await its
+  // initial-state push before the anchored reads. No-op once opened / when the
+  // injected `ng` has no `doc_subscribe` (unit fake). See open-repo.ts.
+  await ensureReposOpen(unique);
+
   // One anchored query per doc, in parallel, tolerant (a bad doc yields []).
   const perDoc = await Promise.all(
     unique.map(async (d) => ({ doc: assertNuri(d), rows: await readDoc(sid, d) })),

packages/client/src/store-registry.ts

@@ -34,6 +34,7 @@
 
 import { docCreate, sparqlUpdate, sparqlQuery } from "./docs";
 import { getStoreRegistryDeps } from "./polyfill";
+import { ensureRepoOpen } from "./open-repo";
 import { escapeLiteral, escapeIri, assertNuri } from "./sparql";
 import type { Nuri, Scope } from "./types";
 
@@ -444,6 +445,14 @@ export async function createEntityDoc(id: string, scope: Scope): Promise<Nuri> {
 async function readScopeIndex(indexDoc: Nuri): Promise<Nuri[]> {
   const s = await session();
   const out: Nuri[] = [];
+  // COLD-START heal (polyfill-era): on a fresh session over a persistent wallet the
+  // scope-index repo (public OR protected — the protected one carries participations
+  // and is the one that most often reads empty) is not yet in `self.repos`, so this
+  // anchored read would return 0 NURIs → nothing gets listed → nothing gets
+  // subscribed (the self-inflicted circularity). Open/subscribe the index repo ONCE
+  // before reading it. Idempotent per session; no-op with the unit fake ng. See
+  // open-repo.ts.
+  await ensureRepoOpen(indexDoc);
   try {
     const res = await sparqlQuery(
       s.sessionId,