fix(routing): make bindings dynamic by calling loadConfig() per-message (#11372)

src/discord/monitor.tool-result.accepts-guild-messages-mentionpatterns-match.test.ts

@@ -10,6 +10,7 @@ const updateLastRouteMock = vi.fn();
 const dispatchMock = vi.fn();
 const readAllowFromStoreMock = vi.fn();
 const upsertPairingRequestMock = vi.fn();
+const loadConfigMock = vi.fn();
 
 vi.mock("./send.js", () => ({
   sendMessageDiscord: (...args: unknown[]) => sendMock(...args),
@@ -30,6 +31,13 @@ vi.mock("../pairing/pairing-store.js", () => ({
   readChannelAllowFromStore: (...args: unknown[]) => readAllowFromStoreMock(...args),
   upsertChannelPairingRequest: (...args: unknown[]) => upsertPairingRequestMock(...args),
 }));
+vi.mock("../config/config.js", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("../config/config.js")>();
+  return {
+    ...actual,
+    loadConfig: (...args: unknown[]) => loadConfigMock(...args),
+  };
+});
 vi.mock("../config/sessions.js", async (importOriginal) => {
   const actual = await importOriginal<typeof import("../config/sessions.js")>();
   return {
@@ -50,6 +58,7 @@ beforeEach(() => {
   });
   readAllowFromStoreMock.mockReset().mockResolvedValue([]);
   upsertPairingRequestMock.mockReset().mockResolvedValue({ code: "PAIRCODE", created: true });
+  loadConfigMock.mockReset().mockReturnValue({});
   __resetDiscordChannelInfoCacheForTest();
 });
 
@@ -685,6 +694,7 @@ describe("discord tool result dispatch", () => {
       },
       bindings: [{ agentId: "support", match: { channel: "discord", guildId: "g1" } }],
     } as ReturnType<typeof import("../config/config.js").loadConfig>;
+    loadConfigMock.mockReturnValue(cfg);
 
     const handler = createDiscordMessageHandler({
       cfg,

src/discord/monitor/message-handler.preflight.ts

@@ -17,6 +17,7 @@ import { formatAllowlistMatchMeta } from "../../channels/allowlist-match.js";
 import { resolveControlCommandGate } from "../../channels/command-gating.js";
 import { logInboundDrop } from "../../channels/logging.js";
 import { resolveMentionGatingWithBypass } from "../../channels/mention-gating.js";
+import { loadConfig } from "../../config/config.js";
 import { logVerbose, shouldLogVerbose } from "../../globals.js";
 import { recordChannelActivity } from "../../infra/channel-activity.js";
 import { enqueueSystemEvent } from "../../infra/system-events.js";
@@ -218,8 +219,9 @@ export async function preflightDiscordMessage(
     earlyThreadParentType = parentInfo.type;
   }
 
+  // Fresh config for bindings lookup; other routing inputs are payload-derived.
   const route = resolveAgentRoute({
-    cfg: params.cfg,
+    cfg: loadConfig(),
     channel: "discord",
     accountId: params.accountId,
     guildId: params.data.guild_id ?? undefined,