diff --git a/src/config/types.agents-shared.ts b/src/config/types.agents-shared.ts
index 8a46eb0e23d..351aba6eb10 100644
--- a/src/config/types.agents-shared.ts
+++ b/src/config/types.agents-shared.ts
@@ -28,8 +28,6 @@ export type AgentSandboxConfig = {
   sessionToolsVisibility?: "spawned" | "all";
   /** Container/workspace scope for sandbox isolation. */
   scope?: "session" | "agent" | "shared";
-  /** @deprecated Legacy sandbox scope toggle; normalized to `scope` on load. */
-  perSession?: boolean;
   workspaceRoot?: string;
   /** Docker-specific sandbox settings. */
   docker?: SandboxDockerSettings;
diff --git a/src/config/types.browser.ts b/src/config/types.browser.ts
index 601720384dd..a1b9b707439 100644
--- a/src/config/types.browser.ts
+++ b/src/config/types.browser.ts
@@ -17,8 +17,6 @@ export type BrowserSnapshotDefaults = {
   mode?: "efficient";
 };
 export type BrowserSsrFPolicyConfig = {
-  /** @deprecated Legacy alias; normalized to `dangerouslyAllowPrivateNetwork` on load. */
-  allowPrivateNetwork?: boolean;
   /** If true, permit browser navigation to private/internal networks. Default: true */
   dangerouslyAllowPrivateNetwork?: boolean;
   /**
diff --git a/src/config/types.gateway.ts b/src/config/types.gateway.ts
index 14046b6834f..caa25a4e98c 100644
--- a/src/config/types.gateway.ts
+++ b/src/config/types.gateway.ts
@@ -75,16 +75,6 @@ export type TalkConfig = {
   provider?: string;
   /** Provider-specific Talk config keyed by provider id. */
   providers?: Record<string, TalkProviderConfig>;
-  /** @deprecated Legacy top-level Talk provider API key; normalized into talk.providers.<provider>.apiKey on load. */
-  apiKey?: SecretInput;
-  /** @deprecated Legacy top-level Talk voice id; normalized into talk.providers.<provider>.voiceId on load. */
-  voiceId?: string;
-  /** @deprecated Legacy top-level Talk voice aliases; normalized into talk.providers.<provider>.voiceAliases on load. */
-  voiceAliases?: Record<string, string>;
-  /** @deprecated Legacy top-level Talk model id; normalized into talk.providers.<provider>.modelId on load. */
-  modelId?: string;
-  /** @deprecated Legacy top-level Talk output format; normalized into talk.providers.<provider>.outputFormat on load. */
-  outputFormat?: string;
   /** Stop speaking when user starts talking (default: true). */
   interruptOnSpeech?: boolean;
   /** Milliseconds of user silence before Talk mode sends the transcript after a pause. */
diff --git a/src/config/types.slack.ts b/src/config/types.slack.ts
index 907a556be1e..e68e7b043db 100644
--- a/src/config/types.slack.ts
+++ b/src/config/types.slack.ts
@@ -162,8 +162,6 @@ export type SlackAccountConfig = {
    * - "progress": show progress status, then send final text
    */
   streaming?: SlackStreamingMode;
-  /** @deprecated Legacy draft streaming mode; normalized into `streaming` on load. */
-  streamMode?: "replace" | "status_final" | "append";
   /**
    * Slack native text streaming toggle (`chat.startStream` / `chat.appendStream` / `chat.stopStream`).
    * Used when `streaming` is `partial`. Default: true.
diff --git a/src/config/types.telegram.ts b/src/config/types.telegram.ts
index 448a7b683e5..2a68bf0f9df 100644
--- a/src/config/types.telegram.ts
+++ b/src/config/types.telegram.ts
@@ -1,5 +1,4 @@
 import type {
-  BlockStreamingChunkConfig,
   BlockStreamingCoalesceConfig,
   ContextVisibilityMode,
   DmPolicy,
@@ -158,12 +157,8 @@ export type TelegramAccountConfig = {
    * - "progress": alias that maps to "partial" on Telegram
    */
   streaming?: TelegramStreamingMode;
-  /** @deprecated Legacy preview streaming key; normalized into `streaming` on load. */
-  streamMode?: "off" | "partial" | "block" | "progress";
   /** Disable block streaming for this account. */
   blockStreaming?: boolean;
-  /** @deprecated Legacy chunking config from `streamMode: "block"`; ignored after migration. */
-  draftChunk?: BlockStreamingChunkConfig;
   /** Merge streamed block replies before sending. */
   blockStreamingCoalesce?: BlockStreamingCoalesceConfig;
   mediaMaxMb?: number;
diff --git a/src/gateway/protocol/index.test.ts b/src/gateway/protocol/index.test.ts
index ad452effd1f..fa65ed01a0b 100644
--- a/src/gateway/protocol/index.test.ts
+++ b/src/gateway/protocol/index.test.ts
@@ -89,11 +89,6 @@ describe("validateTalkConfigResult", () => {
                 },
               },
             },
-            apiKey: {
-              source: "env",
-              provider: "default",
-              id: "ELEVENLABS_API_KEY",
-            },
           },
         },
       }),
diff --git a/src/gateway/protocol/schema/channels.ts b/src/gateway/protocol/schema/channels.ts
index 2fe602de24f..8694aae5858 100644
--- a/src/gateway/protocol/schema/channels.ts
+++ b/src/gateway/protocol/schema/channels.ts
@@ -54,21 +54,11 @@ const ResolvedTalkConfigSchema = Type.Object(
   { additionalProperties: false },
 );
 
-const LegacyTalkConfigSchema = Type.Object(
-  {
-    ...talkProviderFieldSchemas,
-    interruptOnSpeech: Type.Optional(Type.Boolean()),
-    silenceTimeoutMs: Type.Optional(Type.Integer({ minimum: 1 })),
-  },
-  { additionalProperties: false },
-);
-
-const NormalizedTalkConfigSchema = Type.Object(
+const TalkConfigSchema = Type.Object(
   {
     provider: Type.Optional(Type.String()),
     providers: Type.Optional(Type.Record(Type.String(), TalkProviderConfigSchema)),
     resolved: ResolvedTalkConfigSchema,
-    ...talkProviderFieldSchemas,
     interruptOnSpeech: Type.Optional(Type.Boolean()),
     silenceTimeoutMs: Type.Optional(Type.Integer({ minimum: 1 })),
   },
@@ -79,7 +69,7 @@ export const TalkConfigResultSchema = Type.Object(
   {
     config: Type.Object(
       {
-        talk: Type.Optional(Type.Union([LegacyTalkConfigSchema, NormalizedTalkConfigSchema])),
+        talk: Type.Optional(TalkConfigSchema),
         session: Type.Optional(
           Type.Object(
             {