refactor(exec-approvals): share socket default merge

src/gateway/server-methods/exec-approvals.ts

@@ -1,9 +1,9 @@
 import type { GatewayRequestHandlers, RespondFn } from "./types.js";
 import {
   ensureExecApprovals,
+  mergeExecApprovalsSocketDefaults,
   normalizeExecApprovals,
   readExecApprovalsSnapshot,
-  resolveExecApprovalsSocketPath,
   saveExecApprovals,
   type ExecApprovalsFile,
   type ExecApprovalsSnapshot,
@@ -134,18 +134,7 @@ export const execApprovalsHandlers: GatewayRequestHandlers = {
       return;
     }
     const normalized = normalizeExecApprovals(incoming as ExecApprovalsFile);
-    const currentSocketPath = snapshot.file.socket?.path?.trim();
-    const currentToken = snapshot.file.socket?.token?.trim();
-    const socketPath =
-      normalized.socket?.path?.trim() ?? currentSocketPath ?? resolveExecApprovalsSocketPath();
-    const token = normalized.socket?.token?.trim() ?? currentToken ?? "";
-    const next: ExecApprovalsFile = {
-      ...normalized,
-      socket: {
-        path: socketPath,
-        token,
-      },
-    };
+    const next = mergeExecApprovalsSocketDefaults({ normalized, current: snapshot.file });
     saveExecApprovals(next);
     const nextSnapshot = readExecApprovalsSnapshot();
     respond(

src/infra/exec-approvals.socket-defaults.test.ts

@@ -0,0 +1,32 @@
+import { describe, expect, it } from "vitest";
+import { mergeExecApprovalsSocketDefaults, normalizeExecApprovals } from "./exec-approvals.js";
+
+describe("mergeExecApprovalsSocketDefaults", () => {
+  it("prefers normalized socket, then current, then default path", () => {
+    const normalized = normalizeExecApprovals({
+      version: 1,
+      agents: {},
+      socket: { path: "/tmp/a.sock", token: "a" },
+    });
+    const current = normalizeExecApprovals({
+      version: 1,
+      agents: {},
+      socket: { path: "/tmp/b.sock", token: "b" },
+    });
+    const merged = mergeExecApprovalsSocketDefaults({ normalized, current });
+    expect(merged.socket?.path).toBe("/tmp/a.sock");
+    expect(merged.socket?.token).toBe("a");
+  });
+
+  it("falls back to current token when missing in normalized", () => {
+    const normalized = normalizeExecApprovals({ version: 1, agents: {} });
+    const current = normalizeExecApprovals({
+      version: 1,
+      agents: {},
+      socket: { path: "/tmp/b.sock", token: "b" },
+    });
+    const merged = mergeExecApprovalsSocketDefaults({ normalized, current });
+    expect(merged.socket?.path).toBeTruthy();
+    expect(merged.socket?.token).toBe("b");
+  });
+});

src/infra/exec-approvals.ts

@@ -241,6 +241,24 @@ export function normalizeExecApprovals(file: ExecApprovalsFile): ExecApprovalsFi
   return normalized;
 }
 
+export function mergeExecApprovalsSocketDefaults(params: {
+  normalized: ExecApprovalsFile;
+  current?: ExecApprovalsFile;
+}): ExecApprovalsFile {
+  const currentSocketPath = params.current?.socket?.path?.trim();
+  const currentToken = params.current?.socket?.token?.trim();
+  const socketPath =
+    params.normalized.socket?.path?.trim() ?? currentSocketPath ?? resolveExecApprovalsSocketPath();
+  const token = params.normalized.socket?.token?.trim() ?? currentToken ?? "";
+  return {
+    ...params.normalized,
+    socket: {
+      path: socketPath,
+      token,
+    },
+  };
+}
+
 function generateToken(): string {
   return crypto.randomBytes(24).toString("base64url");
 }

src/node-host/invoke.ts

@@ -12,12 +12,12 @@ import {
   evaluateShellAllowlist,
   requiresExecApproval,
   normalizeExecApprovals,
+  mergeExecApprovalsSocketDefaults,
   recordAllowlistUse,
   resolveExecApprovals,
   resolveSafeBins,
   ensureExecApprovals,
   readExecApprovalsSnapshot,
-  resolveExecApprovalsSocketPath,
   saveExecApprovals,
   type ExecAsk,
   type ExecApprovalsFile,
@@ -422,18 +422,7 @@ export async function handleInvoke(
       const snapshot = readExecApprovalsSnapshot();
       requireExecApprovalsBaseHash(params, snapshot);
       const normalized = normalizeExecApprovals(params.file);
-      const currentSocketPath = snapshot.file.socket?.path?.trim();
-      const currentToken = snapshot.file.socket?.token?.trim();
-      const socketPath =
-        normalized.socket?.path?.trim() ?? currentSocketPath ?? resolveExecApprovalsSocketPath();
-      const token = normalized.socket?.token?.trim() ?? currentToken ?? "";
-      const next: ExecApprovalsFile = {
-        ...normalized,
-        socket: {
-          path: socketPath,
-          token,
-        },
-      };
+      const next = mergeExecApprovalsSocketDefaults({ normalized, current: snapshot.file });
       saveExecApprovals(next);
       const nextSnapshot = readExecApprovalsSnapshot();
       const payload: ExecApprovalsSnapshot = {