diff --git a/CHANGELOG.md b/CHANGELOG.md
index e93f8af..5aea2e9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+- Reopen large audit logs without overflowing the JavaScript function argument limit, preserving all history and subsequent appends.
 - Make concurrent sign-in starts share one account and reject missing production email configuration without logging sign-in tokens.
 - Snapshot protocol messages across asynchronous checks so caller mutations cannot replace guarded plaintext, verified ciphertext, recipients, or replay identifiers.
 - Add receiver-owned directional friendship permissions with signed updates, bidirectional migration defaults, and preserved queued delivery and receipts; thanks @jason-allen-oneal (#12).
diff --git a/docs/security.md b/docs/security.md
index 9225675..4cae366 100644
--- a/docs/security.md
+++ b/docs/security.md
@@ -35,4 +35,6 @@ discarding an incomplete final record. A complete final record without its newli
 is preserved and durably separated before further writes. Corrupt middle records
 remain errors.
 
+Reopening an audit log verifies and retains its full chain, including histories larger than the JavaScript function argument limit; subsequent appends continue from the verified head.
+
 Read the full [design](DESIGN.md) for envelope fields, review semantics, and key recovery.
diff --git a/packages/protocol/src/node.test.ts b/packages/protocol/src/node.test.ts
index 2244792..0804fca 100644
--- a/packages/protocol/src/node.test.ts
+++ b/packages/protocol/src/node.test.ts
@@ -2,7 +2,7 @@ import { appendFile, mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { afterEach, describe, expect, it } from "vitest";
-import { appendAudit, verifyChain } from "./audit.js";
+import { appendAudit, createAuditEntry, verifyChain } from "./audit.js";
 import { generateIdentity } from "./identity.js";
 import { JsonlAuditStore, FileReplayStore } from "./node.js";
 import { signReceipt } from "./receipts.js";
@@ -24,6 +24,27 @@ async function temporaryDirectory(prefix: string): Promise<string> {
 }
 
 describe("Node stores", () => {
+  it("reopens and extends an audit log larger than the function argument limit", async () => {
+    const directory = await temporaryDirectory("reef-audit-large-");
+    const path = join(directory, "audit.jsonl");
+    const count = 150_000;
+    const lines: string[] = [];
+    let head = { hash: "", seq: 0 };
+    for (let index = 0; index < count; index++) {
+      const entry = createAuditEntry("synthetic", { id: index }, 10, auditKey, head);
+      lines.push(JSON.stringify(entry));
+      head = { hash: entry.entryHash, seq: entry.event.seq };
+    }
+    await writeFile(path, `${lines.join("\n")}\n`);
+    const reopened = new JsonlAuditStore(path, auditKey);
+    const appended = await reopened.appendEvent("after-reopen", { id: count }, 11);
+    expect(appended.event.seq).toBe(count + 1);
+    expect(appended.prevHash).toBe(head.hash);
+    const entries = await reopened.entries();
+    expect(entries).toHaveLength(count + 1);
+    expect(verifyChain(entries)).toBe(true);
+  }, 30_000);
+
   it("persists serialized audit JSONL", async () => {
     const directory = await temporaryDirectory("reef-audit-");
     const path = join(directory, "audit.jsonl");
diff --git a/packages/protocol/src/node.ts b/packages/protocol/src/node.ts
index 78decd2..95e5dbe 100644
--- a/packages/protocol/src/node.ts
+++ b/packages/protocol/src/node.ts
@@ -47,7 +47,7 @@ export class JsonlAuditStore implements AuditStore {
     if (this.#loaded) return;
     const entries = await readJsonl<AuditEntry>(this.path);
     if (!verifyChain(entries)) throw new Error("invalid audit chain");
-    this.#entries.push(...entries);
+    for (const entry of entries) this.#entries.push(entry);
     const last = entries.at(-1);
     this.#head = { hash: last?.entryHash ?? "", seq: last?.event.seq ?? 0 };
     this.#loaded = true;