diff --git a/bin/cli/runtime/nativeDeps.mjs b/bin/cli/runtime/nativeDeps.mjs
index 2a0787bd04b5..1dc442270e32 100644
--- a/bin/cli/runtime/nativeDeps.mjs
+++ b/bin/cli/runtime/nativeDeps.mjs
@@ -52,6 +52,31 @@ export function hasModule(name) {
   return existsSync(join(runtimeModules(), name, "package.json"));
 }
 
+/**
+ * Probe whether a native addon (.node) file can actually be dlopen'd by the Node runtime that
+ * is going to load it. Runs in a throwaway subprocess so a real ABI mismatch (which can segfault
+ * the process instead of throwing) never takes down the caller — only the probe subprocess.
+ */
+function probeNativeBinaryLoadable(binary) {
+  try {
+    const res = spawnSync(
+      process.execPath,
+      [
+        "-e",
+        "try { require(process.argv[1]); process.exit(0); } catch (e) { process.exit(1); }",
+        binary,
+      ],
+      { timeout: 10_000, stdio: "ignore" }
+    );
+    // status === 0 means require() (and therefore dlopen) succeeded. Anything else — a thrown
+    // ERR_DLOPEN_FAILED/NODE_MODULE_VERSION mismatch (status 1) or a crash (status null with a
+    // signal, e.g. SIGSEGV) — means the binary is not safe to load.
+    return res.status === 0;
+  } catch {
+    return false;
+  }
+}
+
 export function isBetterSqliteBinaryValid() {
   const binary = join(
     runtimeModules(),
@@ -68,10 +93,18 @@ export function isBetterSqliteBinaryValid() {
     closeSync(fd);
     const magic = buf.toString("hex");
     const os = platform();
-    if (os === "linux") return magic.startsWith("7f454c46"); // ELF
-    if (os === "darwin") return magic.startsWith("cffaedfe") || magic.startsWith("cefaedfe"); // Mach-O
-    if (os === "win32") return magic.startsWith("4d5a"); // PE/MZ
-    return true;
+    let formatOk;
+    if (os === "linux") formatOk = magic.startsWith("7f454c46"); // ELF
+    else if (os === "darwin")
+      formatOk = magic.startsWith("cffaedfe") || magic.startsWith("cefaedfe"); // Mach-O
+    else if (os === "win32") formatOk = magic.startsWith("4d5a"); // PE/MZ
+    else formatOk = true;
+    if (!formatOk) return false;
+    // File-format magic bytes alone do not guarantee the binary was built for the Node ABI
+    // (NODE_MODULE_VERSION) that will load it — a stale/foreign-ABI binary passes the header
+    // check and then crashes (segfault) on load instead of triggering a rebuild. Actually
+    // attempt to load it, isolated in a subprocess.
+    return probeNativeBinaryLoadable(binary);
   } catch {
     return false;
   }
diff --git a/changelog.d/fixes/2413-preserve-agent-headers.md b/changelog.d/fixes/2413-preserve-agent-headers.md
new file mode 100644
index 000000000000..6353f5dd778f
--- /dev/null
+++ b/changelog.d/fixes/2413-preserve-agent-headers.md
@@ -0,0 +1 @@
+- **fix(executors):** forward agent-supplied `X-Session-ID`/`X-Title` metadata headers to upstream providers — previously dropped for every client outside the `x-opencode-*` allowlist. (thanks @chitholian) (#7104)
diff --git a/changelog.d/fixes/2493-better-sqlite3-abi-validation.md b/changelog.d/fixes/2493-better-sqlite3-abi-validation.md
new file mode 100644
index 000000000000..dba246809de5
--- /dev/null
+++ b/changelog.d/fixes/2493-better-sqlite3-abi-validation.md
@@ -0,0 +1 @@
+- **fix(cli):** the runtime self-heal now verifies a cached `better-sqlite3` native binary actually loads for the running Node before trusting it — the old check only inspected the file's magic bytes (ELF/Mach-O/PE header), so a binary built for a different Node ABI passed validation and segfaulted the process on first use instead of triggering a rebuild. (thanks @mrprohack) (#7105)
diff --git a/open-sse/utils/opencodeHeaders.ts b/open-sse/utils/opencodeHeaders.ts
index 4e1221877cdb..8569c8512c4d 100644
--- a/open-sse/utils/opencodeHeaders.ts
+++ b/open-sse/utils/opencodeHeaders.ts
@@ -12,6 +12,15 @@ const OPENCODE_HEADER_KEYS = [
   "x-opencode-client",
 ] as const;
 
+/**
+ * Common agent-metadata headers used by non-OpenCode clients (custom agents/
+ * providers) for upstream request tracking and attribution. Forwarded the same
+ * way as the x-opencode-* set: case-insensitive lookup, client value wins.
+ * Added for 9router#2413 — these were previously dropped for every client
+ * outside the OpenCode allowlist.
+ */
+const AGENT_METADATA_HEADER_KEYS = ["x-session-id", "x-title"] as const;
+
 /**
  * Case-insensitive lookup for a header in a headers record.
  */
@@ -26,6 +35,8 @@ function findHeader(headers: Record<string, string>, name: string): string | und
  * 1. Forwards User-Agent from clientHeaders via `setUserAgentHeader()`
  * 2. Forwards x-opencode-session, x-opencode-request, x-opencode-project,
  *    x-opencode-client headers (case-insensitive match)
+ * 3. Forwards x-session-id, x-title agent-metadata headers (case-insensitive
+ *    match) — common conventions used by non-OpenCode agent clients (9router#2413)
  *
  * @param headers - The outbound headers record to mutate
  * @param clientHeaders - The client-provided headers to forward from
@@ -60,6 +71,14 @@ export function forwardOpencodeClientHeaders(
     }
   }
 
+  // 2b. Forward agent-metadata headers (x-session-id, x-title) — 9router#2413
+  for (const headerName of AGENT_METADATA_HEADER_KEYS) {
+    const value = findHeader(clientHeaders, headerName);
+    if (value) {
+      headers[headerName] = value;
+    }
+  }
+
   // 3. OpencodeExecutor-only: synthesize session/request id from fallback headers
   if (options?.synthesizeRequestId && !headers["x-opencode-session"]) {
     const sessionAffinity =
diff --git a/tests/unit/cli-runtime.test.ts b/tests/unit/cli-runtime.test.ts
index 46a3e3204cc3..293f6a393344 100644
--- a/tests/unit/cli-runtime.test.ts
+++ b/tests/unit/cli-runtime.test.ts
@@ -71,20 +71,60 @@ test("buildEnvWithRuntime preserva NODE_PATH existente", async () => {
   assert.ok(env.NODE_PATH.includes("/existing/path"), "NODE_PATH original deve ser preservado");
 });
 
-test("isBetterSqliteBinaryValid detecta ELF magic bytes (Linux)", async () => {
+test("isBetterSqliteBinaryValid rejeita binário com magic bytes válidos mas ABI incompatível (regressão #2493)", async () => {
+  // Regression for upstream 9router#2493: a binary that only "looks" native (correct ELF/Mach-O/PE
+  // header) but was built for a different Node ABI (NODE_MODULE_VERSION) must NOT be reported as
+  // valid — loading it crashes the process (segfault) instead of triggering a rebuild.
   const { getRuntimeNodeModules, isBetterSqliteBinaryValid } =
     await import("../../bin/cli/runtime/nativeDeps.mjs");
   const nm = getRuntimeNodeModules();
   const buildDir = join(nm, "better-sqlite3", "build", "Release");
   mkdirSync(buildDir, { recursive: true });
   const binary = join(buildDir, "better_sqlite3.node");
-  const buf = Buffer.from([0x7f, 0x45, 0x4c, 0x46, 0x00, 0x00, 0x00, 0x00]);
+  const { platform } = await import("node:os");
+  const os = platform();
+  // Correct file-format magic bytes for the current OS, but not a real, loadable native addon —
+  // this is exactly what the old magic-bytes-only check let through.
+  const magicByPlatform = {
+    linux: [0x7f, 0x45, 0x4c, 0x46],
+    darwin: [0xcf, 0xfa, 0xed, 0xfe],
+    win32: [0x4d, 0x5a],
+  };
+  const magic = magicByPlatform[os] ?? magicByPlatform.linux;
+  const buf = Buffer.concat([Buffer.from(magic), Buffer.alloc(64, 0)]);
   writeFileSync(binary, buf);
   const result = isBetterSqliteBinaryValid();
-  const { platform } = await import("node:os");
-  if (platform() === "linux") {
-    assert.equal(result, true, "ELF magic bytes devem ser válidos no Linux");
+  assert.equal(
+    result,
+    false,
+    "binário com header válido mas ABI/conteúdo incompatível deve ser inválido"
+  );
+  rmSync(join(nm, "better-sqlite3"), { recursive: true, force: true });
+});
+
+test("isBetterSqliteBinaryValid aceita um binário nativo real e carregável", async () => {
+  const { getRuntimeNodeModules, isBetterSqliteBinaryValid } =
+    await import("../../bin/cli/runtime/nativeDeps.mjs");
+  const { existsSync, copyFileSync } = await import("node:fs");
+  const realBinary = join(
+    process.cwd(),
+    "node_modules",
+    "better-sqlite3",
+    "build",
+    "Release",
+    "better_sqlite3.node"
+  );
+  if (!existsSync(realBinary)) {
+    // Ambient runtime without a compiled better-sqlite3 binary — nothing to assert here.
+    return;
   }
+  const nm = getRuntimeNodeModules();
+  const buildDir = join(nm, "better-sqlite3", "build", "Release");
+  mkdirSync(buildDir, { recursive: true });
+  const binary = join(buildDir, "better_sqlite3.node");
+  copyFileSync(realBinary, binary);
+  const result = isBetterSqliteBinaryValid();
+  assert.equal(result, true, "um binário real, compatível com o Node atual, deve ser válido");
   rmSync(join(nm, "better-sqlite3"), { recursive: true, force: true });
 });
 
diff --git a/tests/unit/refactor-opencodeHeaders.test.ts b/tests/unit/refactor-opencodeHeaders.test.ts
index b79865b30eee..19a5a1cdf6cd 100644
--- a/tests/unit/refactor-opencodeHeaders.test.ts
+++ b/tests/unit/refactor-opencodeHeaders.test.ts
@@ -116,6 +116,43 @@ describe("forwardOpencodeClientHeaders – x-opencode-* headers", () => {
   });
 });
 
+// ── agent metadata headers (X-Session-ID / X-Title) — 9router#2413 ─────────
+// Non-OpenCode agent clients (e.g. custom providers) commonly send X-Session-ID
+// and X-Title for upstream request tracking/attribution. These were previously
+// dropped for every client outside the x-opencode-* allowlist.
+
+describe("forwardOpencodeClientHeaders – X-Session-ID / X-Title", () => {
+  it("forwards X-Session-ID from client headers", () => {
+    const headers = h();
+    const clientHeaders = { "X-Session-ID": "sess-xyz" };
+    forwardOpencodeClientHeaders(headers, clientHeaders);
+    assert.equal(headers["x-session-id"], "sess-xyz");
+  });
+
+  it("forwards X-Title from client headers", () => {
+    const headers = h();
+    const clientHeaders = { "X-Title": "My Agent" };
+    forwardOpencodeClientHeaders(headers, clientHeaders);
+    assert.equal(headers["x-title"], "My Agent");
+  });
+
+  it("matches X-Session-ID / X-Title case-insensitively", () => {
+    const headers = h();
+    const clientHeaders = { "x-session-id": "sess-lower", "x-title": "lower title" };
+    forwardOpencodeClientHeaders(headers, clientHeaders);
+    assert.equal(headers["x-session-id"], "sess-lower");
+    assert.equal(headers["x-title"], "lower title");
+  });
+
+  it("still does NOT forward unrelated unknown headers", () => {
+    const headers = h();
+    const clientHeaders = { "X-Session-ID": "sess-1", "X-Random-Other": "nope" };
+    forwardOpencodeClientHeaders(headers, clientHeaders);
+    assert.equal(headers["x-session-id"], "sess-1");
+    assert.equal(headers["X-Random-Other"], undefined);
+  });
+});
+
 // ── synthesizeRequestId ─────────────────────────────────────────────────────
 
 describe("forwardOpencodeClientHeaders – synthesizeRequestId", () => {