diff --git a/apps/desktop/package.json b/apps/desktop/package.json
index 52c5114f1e3..0153ae2449b 100644
--- a/apps/desktop/package.json
+++ b/apps/desktop/package.json
@@ -32,5 +32,5 @@
     "tailwindcss": "^4.0.0",
     "vite-plus": "catalog:"
   },
-  "productName": "TritonAI Code"
+  "productName": "TritonAI Harness"
 }
diff --git a/apps/desktop/scripts/electron-launcher.mjs b/apps/desktop/scripts/electron-launcher.mjs
index 9fe3fa23135..1bda7c846fe 100644
--- a/apps/desktop/scripts/electron-launcher.mjs
+++ b/apps/desktop/scripts/electron-launcher.mjs
@@ -1,4 +1,4 @@
-// This file mostly exists because we want dev mode to say "TritonAI Code (Dev)" instead of "electron"
+// This file mostly exists because we want dev mode to say "TritonAI Harness (Dev)" instead of "electron"
 
 import { spawnSync } from "node:child_process";
 import {
@@ -26,7 +26,7 @@ const repoRoot = resolve(desktopDir, "..", "..");
 const devBundleIdSuffix = basename(repoRoot)
   .toLowerCase()
   .replaceAll(/[^a-z0-9]+/g, "");
-export const APP_DISPLAY_NAME = isDevelopment ? "TritonAI Code (Dev)" : "TritonAI Code";
+export const APP_DISPLAY_NAME = isDevelopment ? "TritonAI Harness (Dev)" : "TritonAI Harness";
 export const APP_BUNDLE_ID = isDevelopment
   ? `edu.ucsd.ai.tritonai-code.dev.${devBundleIdSuffix || "local"}`
   : "edu.ucsd.ai.tritonai-code";
diff --git a/apps/desktop/src/app/DesktopApp.ts b/apps/desktop/src/app/DesktopApp.ts
index 69167e75bb5..41cca978623 100644
--- a/apps/desktop/src/app/DesktopApp.ts
+++ b/apps/desktop/src/app/DesktopApp.ts
@@ -120,7 +120,7 @@ const handleFatalStartupError = Effect.fn("desktop.startup.handleFatalStartupErr
   const wasQuitting = yield* Ref.getAndSet(state.quitting, true);
   if (!wasQuitting) {
     yield* electronDialog.showErrorBox(
-      "TritonAI Code failed to start",
+      "TritonAI Harness failed to start",
       `Stage: ${stage}\n${message}${detail}`,
     );
   }
diff --git a/apps/desktop/src/app/DesktopAppIdentity.test.ts b/apps/desktop/src/app/DesktopAppIdentity.test.ts
index 661ccb4000e..9cd4239c6e4 100644
--- a/apps/desktop/src/app/DesktopAppIdentity.test.ts
+++ b/apps/desktop/src/app/DesktopAppIdentity.test.ts
@@ -179,8 +179,8 @@ describe("DesktopAppIdentity", () => {
         const identity = yield* DesktopAppIdentity.DesktopAppIdentity;
         yield* identity.configure;
 
-        assert.deepEqual(calls.setName, ["TritonAI Code"]);
-        assert.equal(calls.setAboutPanelOptions[0]?.applicationName, "TritonAI Code");
+        assert.deepEqual(calls.setName, ["TritonAI Harness"]);
+        assert.equal(calls.setAboutPanelOptions[0]?.applicationName, "TritonAI Harness");
         assert.equal(calls.setAboutPanelOptions[0]?.applicationVersion, "1.2.3");
         assert.equal(calls.setAboutPanelOptions[0]?.version, "0123456789ab");
         assert.deepEqual(calls.setDockIcon, ["/icon.png"]);
diff --git a/apps/desktop/src/app/DesktopEnvironment.ts b/apps/desktop/src/app/DesktopEnvironment.ts
index 969707c8e15..d67837f52ab 100644
--- a/apps/desktop/src/app/DesktopEnvironment.ts
+++ b/apps/desktop/src/app/DesktopEnvironment.ts
@@ -81,7 +81,7 @@ export class DesktopEnvironment extends Context.Service<
   DesktopEnvironmentShape
 >()("@t3tools/desktop/app/DesktopEnvironment") {}
 
-const APP_BASE_NAME = "TritonAI Code";
+const APP_BASE_NAME = "TritonAI Harness";
 
 function resolveDesktopAppStageLabel(input: {
   readonly isDevelopment: boolean;
diff --git a/apps/desktop/src/ssh/DesktopSshPasswordPrompts.ts b/apps/desktop/src/ssh/DesktopSshPasswordPrompts.ts
index e55896b0a86..c5cbe7fd394 100644
--- a/apps/desktop/src/ssh/DesktopSshPasswordPrompts.ts
+++ b/apps/desktop/src/ssh/DesktopSshPasswordPrompts.ts
@@ -16,7 +16,8 @@ import * as IpcChannels from "../ipc/channels.ts";
 import * as ElectronWindow from "../electron/ElectronWindow.ts";
 
 const DEFAULT_SSH_PASSWORD_PROMPT_TIMEOUT_MS = 3 * 60 * 1000;
-const WINDOW_UNAVAILABLE_MESSAGE = "TritonAI Code window is not available for SSH authentication.";
+const WINDOW_UNAVAILABLE_MESSAGE =
+  "TritonAI Harness window is not available for SSH authentication.";
 
 type DesktopSshPasswordPromptResolutionInput =
   typeof DesktopSshPasswordPromptResolutionInputSchema.Type;
diff --git a/apps/desktop/src/window/DesktopApplicationMenu.ts b/apps/desktop/src/window/DesktopApplicationMenu.ts
index 2a070146b71..733888de804 100644
--- a/apps/desktop/src/window/DesktopApplicationMenu.ts
+++ b/apps/desktop/src/window/DesktopApplicationMenu.ts
@@ -53,7 +53,7 @@ const checkForUpdatesFromMenu: Effect.Effect<
     yield* electronDialog.showMessageBox({
       type: "info",
       title: "You're up to date!",
-      message: `TritonAI Code ${updateState.currentVersion} is currently the newest version available.`,
+      message: `TritonAI Harness ${updateState.currentVersion} is currently the newest version available.`,
       buttons: ["OK"],
     });
   } else if (updateState.status === "error") {
diff --git a/apps/server/src/bin.ts b/apps/server/src/bin.ts
index 9203c2c4d1f..bd000b9a4e4 100644
--- a/apps/server/src/bin.ts
+++ b/apps/server/src/bin.ts
@@ -40,7 +40,7 @@ const connectUnavailableCommand = Command.make("connect").pipe(
 
 export const makeCli = ({ cloudEnabled = hasCloudPublicConfig } = {}) =>
   Command.make("t3", { ...sharedServerCommandFlags }).pipe(
-    Command.withDescription("Run the TritonAI Code server."),
+    Command.withDescription("Run the TritonAI Harness server."),
     Command.withHandler((flags) => runServerCommand(flags)),
     Command.withSubcommands([
       startCommand,
diff --git a/apps/server/src/cli/server.ts b/apps/server/src/cli/server.ts
index 7a567794307..f671481a8a2 100644
--- a/apps/server/src/cli/server.ts
+++ b/apps/server/src/cli/server.ts
@@ -19,13 +19,13 @@ export const runServerCommand = (
   });
 
 export const startCommand = Command.make("start", { ...sharedServerCommandFlags }).pipe(
-  Command.withDescription("Run the TritonAI Code server."),
+  Command.withDescription("Run the TritonAI Harness server."),
   Command.withHandler((flags) => runServerCommand(flags)),
 );
 
 export const serveCommand = Command.make("serve", { ...sharedServerCommandFlags }).pipe(
   Command.withDescription(
-    "Run the TritonAI Code server without opening a browser and print headless pairing details.",
+    "Run the TritonAI Harness server without opening a browser and print headless pairing details.",
   ),
   Command.withHandler((flags) =>
     runServerCommand(flags, {
diff --git a/apps/server/src/mcp/McpHttpServer.ts b/apps/server/src/mcp/McpHttpServer.ts
index 6cde2017a9e..95b2520fd5b 100644
--- a/apps/server/src/mcp/McpHttpServer.ts
+++ b/apps/server/src/mcp/McpHttpServer.ts
@@ -180,7 +180,7 @@ export const PreviewToolkitRegistrationLive = Layer.mergeAll(
 );
 
 const McpTransportLive = McpServer.layerHttp({
-  name: "T3 Code",
+  name: "TritonAI Harness",
   version: packageJson.version,
   path: "/mcp",
 }).pipe(Layer.provide(McpAuthMiddlewareLive));
diff --git a/apps/server/src/provider/CodexDeveloperInstructions.ts b/apps/server/src/provider/CodexDeveloperInstructions.ts
index b46a4ce1ba3..5f8e8f69369 100644
--- a/apps/server/src/provider/CodexDeveloperInstructions.ts
+++ b/apps/server/src/provider/CodexDeveloperInstructions.ts
@@ -1,8 +1,8 @@
 const T3_CODE_BROWSER_TOOL_INSTRUCTIONS = `
 
-## T3 Code collaborative browser
+## TritonAI Harness collaborative browser
 
-You are running inside T3 Code. The \`t3-code\` MCP server is the product-native collaborative browser shared with the user. When it exposes \`preview_*\` tools, prefer those tools for browser navigation, inspection, interaction, screenshots, and recordings.
+You are running inside TritonAI Harness. The \`t3-code\` MCP server is the product-native collaborative browser shared with the user. When it exposes \`preview_*\` tools, prefer those tools for browser navigation, inspection, interaction, screenshots, and recordings.
 
 For browser work, first call \`preview_status\`. If no automation-capable preview is attached, call \`preview_open\` before concluding that the browser is unavailable. Then use \`preview_navigate\`, \`preview_snapshot\`, and the focused interaction tools. Prefer snapshot-provided locators over coordinates.
 
diff --git a/apps/server/src/provider/Layers/ClaudeProvider.ts b/apps/server/src/provider/Layers/ClaudeProvider.ts
index 84744dddd39..e7674453015 100644
--- a/apps/server/src/provider/Layers/ClaudeProvider.ts
+++ b/apps/server/src/provider/Layers/ClaudeProvider.ts
@@ -648,7 +648,7 @@ export const checkClaudeProviderStatus = Effect.fn("checkClaudeProviderStatus")(
         version: null,
         status: "warning",
         auth: { status: "unknown" },
-        message: "Claude is disabled in TritonAI Code settings.",
+        message: "Claude is disabled in TritonAI Harness settings.",
       },
     });
   }
@@ -802,7 +802,7 @@ export const makePendingClaudeProvider = (
           version: null,
           status: "warning",
           auth: { status: "unknown" },
-          message: "Claude is disabled in TritonAI Code settings.",
+          message: "Claude is disabled in TritonAI Harness settings.",
         },
       });
     }
diff --git a/apps/server/src/provider/Layers/CodexProvider.ts b/apps/server/src/provider/Layers/CodexProvider.ts
index dced7f81be4..57b1e43491b 100644
--- a/apps/server/src/provider/Layers/CodexProvider.ts
+++ b/apps/server/src/provider/Layers/CodexProvider.ts
@@ -274,7 +274,7 @@ export function buildCodexInitializeParams(): CodexSchema.V1InitializeParams {
   return {
     clientInfo: {
       name: "t3code_desktop",
-      title: "TritonAI Code Desktop",
+      title: "TritonAI Harness Desktop",
       version: packageJson.version,
     },
     capabilities: {
@@ -331,7 +331,7 @@ const probeCodexAppServerProvider = Effect.fn("probeCodexAppServerProvider")(fun
   const initialize = yield* client.request("initialize", {
     clientInfo: {
       name: "t3code_desktop",
-      title: "TritonAI Code Desktop",
+      title: "TritonAI Harness Desktop",
       version: "0.1.0",
     },
     capabilities: {
@@ -407,7 +407,7 @@ const makePendingCodexProvider = (
           version: null,
           status: "warning",
           auth: { status: "unknown" },
-          message: "Codex is disabled in TritonAI Code settings.",
+          message: "Codex is disabled in TritonAI Harness settings.",
         },
       });
     }
@@ -492,7 +492,7 @@ export const checkCodexProviderStatus = Effect.fn("checkCodexProviderStatus")(fu
         version: null,
         status: "warning",
         auth: { status: "unknown" },
-        message: "Codex is disabled in TritonAI Code settings.",
+        message: "Codex is disabled in TritonAI Harness settings.",
       },
     });
   }
diff --git a/apps/server/src/provider/Layers/CursorProvider.ts b/apps/server/src/provider/Layers/CursorProvider.ts
index 71993483486..54da3e6d0b3 100644
--- a/apps/server/src/provider/Layers/CursorProvider.ts
+++ b/apps/server/src/provider/Layers/CursorProvider.ts
@@ -85,7 +85,7 @@ export function buildInitialCursorProviderSnapshot(
           version: null,
           status: "warning",
           auth: { status: "unknown" },
-          message: "Cursor is disabled in TritonAI Code settings.",
+          message: "Cursor is disabled in TritonAI Harness settings.",
         },
       });
     }
@@ -990,7 +990,7 @@ export const checkCursorProviderStatus = Effect.fn("checkCursorProviderStatus")(
         version: null,
         status: "warning",
         auth: { status: "unknown" },
-        message: "Cursor is disabled in TritonAI Code settings.",
+        message: "Cursor is disabled in TritonAI Harness settings.",
       },
     });
   }
diff --git a/apps/server/src/provider/Layers/GrokProvider.ts b/apps/server/src/provider/Layers/GrokProvider.ts
index 35611398b4b..41e3a3d59bf 100644
--- a/apps/server/src/provider/Layers/GrokProvider.ts
+++ b/apps/server/src/provider/Layers/GrokProvider.ts
@@ -73,7 +73,7 @@ export function buildInitialGrokProviderSnapshot(
           version: null,
           status: "warning",
           auth: { status: "unknown" },
-          message: "Grok is disabled in T3 Code settings.",
+          message: "Grok is disabled in TritonAI Harness settings.",
         },
       });
     }
@@ -183,7 +183,7 @@ export const checkGrokProviderStatus = Effect.fn("checkGrokProviderStatus")(func
         version: null,
         status: "warning",
         auth: { status: "unknown" },
-        message: "Grok is disabled in T3 Code settings.",
+        message: "Grok is disabled in TritonAI Harness settings.",
       },
     });
   }
diff --git a/apps/server/src/provider/Layers/OpenCodeAdapter.ts b/apps/server/src/provider/Layers/OpenCodeAdapter.ts
index 838c821e570..0ebe639616c 100644
--- a/apps/server/src/provider/Layers/OpenCodeAdapter.ts
+++ b/apps/server/src/provider/Layers/OpenCodeAdapter.ts
@@ -1132,7 +1132,7 @@ export function makeOpenCodeAdapter(
                     )
                   : yield* runOpenCodeSdk("session.create", () =>
                       client.session.create({
-                        title: `TritonAI Code ${input.threadId}`,
+                        title: `TritonAI Harness ${input.threadId}`,
                         permission: buildOpenCodePermissionRules(input.runtimeMode),
                       }),
                     );
diff --git a/apps/server/src/provider/Layers/OpenCodeExternalSessionSync.test.ts b/apps/server/src/provider/Layers/OpenCodeExternalSessionSync.test.ts
index 3e26e7bbe9d..3be4c5da096 100644
--- a/apps/server/src/provider/Layers/OpenCodeExternalSessionSync.test.ts
+++ b/apps/server/src/provider/Layers/OpenCodeExternalSessionSync.test.ts
@@ -222,7 +222,12 @@ describe("OpenCodeExternalSessionSync", () => {
         makeSession({
           sessionId: "session-t3-owned",
           directory: KNOWN_PROJECT_ROOT,
-          title: `TritonAI Code ${ThreadId.make("existing-t3-thread")}`,
+          title: `TritonAI Harness ${ThreadId.make("existing-t3-thread")}`,
+        }),
+        makeSession({
+          sessionId: "session-t3-owned-legacy",
+          directory: KNOWN_PROJECT_ROOT,
+          title: `TritonAI Code ${ThreadId.make("existing-legacy-t3-thread")}`,
         }),
       ];
       const harness = makeHarnessLayer(sessions);
@@ -231,9 +236,9 @@ describe("OpenCodeExternalSessionSync", () => {
         const sync = yield* OpenCodeExternalSessionSync;
         const result = yield* sync.syncOnce;
         expect(result).toMatchObject({
-          discoveredCount: 4,
+          discoveredCount: 5,
           importedCount: 2,
-          skippedCount: 2,
+          skippedCount: 3,
           failedInstanceCount: 0,
         });
 
diff --git a/apps/server/src/provider/Layers/OpenCodeExternalSessionSync.ts b/apps/server/src/provider/Layers/OpenCodeExternalSessionSync.ts
index f2c2d5ca9be..299ed6a0618 100644
--- a/apps/server/src/provider/Layers/OpenCodeExternalSessionSync.ts
+++ b/apps/server/src/provider/Layers/OpenCodeExternalSessionSync.ts
@@ -37,7 +37,7 @@ import {
 } from "../Services/OpenCodeExternalSessionSync.ts";
 
 const OPENCODE_PROVIDER = ProviderDriverKind.make("opencode");
-const T3_OWNED_SESSION_TITLE_PREFIX = "TritonAI Code ";
+const T3_OWNED_SESSION_TITLE_PREFIXES = ["TritonAI Harness ", "TritonAI Code "] as const;
 const DEFAULT_SYNC_INTERVAL_MS = 60_000;
 const DEFAULT_SESSION_LIST_LIMIT = 200;
 
@@ -109,7 +109,7 @@ export function matchOpenCodeSessionToProject(
 }
 
 export function isT3OwnedOpenCodeSession(session: OpenCodeExternalSessionSummary): boolean {
-  return session.title.startsWith(T3_OWNED_SESSION_TITLE_PREFIX);
+  return T3_OWNED_SESSION_TITLE_PREFIXES.some((prefix) => session.title.startsWith(prefix));
 }
 
 export function externalThreadIdForOpenCodeSession(input: {
diff --git a/apps/server/src/provider/Layers/OpenCodeProvider.ts b/apps/server/src/provider/Layers/OpenCodeProvider.ts
index fc83653f711..8d7aa4a62c2 100644
--- a/apps/server/src/provider/Layers/OpenCodeProvider.ts
+++ b/apps/server/src/provider/Layers/OpenCodeProvider.ts
@@ -418,8 +418,8 @@ export const makePendingOpenCodeProvider = (
             auth: { status: "unknown" },
             message:
               openCodeSettings.serverUrl.trim().length > 0
-                ? "OpenCode is disabled in TritonAI Code settings. A server URL is configured."
-                : "OpenCode is disabled in TritonAI Code settings.",
+                ? "OpenCode is disabled in TritonAI Harness settings. A server URL is configured."
+                : "OpenCode is disabled in TritonAI Harness settings.",
           },
         }),
         openCodeSettings,
@@ -495,8 +495,8 @@ export const checkOpenCodeProviderStatus = Effect.fn("checkOpenCodeProviderStatu
           status: "warning",
           auth: { status: "unknown" },
           message: isExternalServer
-            ? "OpenCode is disabled in TritonAI Code settings. A server URL is configured."
-            : "OpenCode is disabled in TritonAI Code settings.",
+            ? "OpenCode is disabled in TritonAI Harness settings. A server URL is configured."
+            : "OpenCode is disabled in TritonAI Harness settings.",
         },
       }),
       openCodeSettings,
@@ -532,7 +532,7 @@ export const checkOpenCodeProviderStatus = Effect.fn("checkOpenCodeProviderStatu
           [
             "Unable to determine OpenCode version from `opencode --version` output.",
             commandDetail ? `Output: ${commandDetail}` : null,
-            `TritonAI Code requires OpenCode v${MINIMUM_OPENCODE_VERSION} or newer.`,
+            `TritonAI Harness requires OpenCode v${MINIMUM_OPENCODE_VERSION} or newer.`,
           ]
             .filter(Boolean)
             .join(" "),
diff --git a/apps/server/src/provider/Layers/ProviderRegistry.test.ts b/apps/server/src/provider/Layers/ProviderRegistry.test.ts
index 422bf8205d1..2f9d3ab7eb2 100644
--- a/apps/server/src/provider/Layers/ProviderRegistry.test.ts
+++ b/apps/server/src/provider/Layers/ProviderRegistry.test.ts
@@ -1609,7 +1609,7 @@ it.layer(Layer.mergeAll(NodeServices.layer, ServerSettingsService.layerTest(), T
               assert.strictEqual(cursorProvider?.status, "disabled");
               assert.strictEqual(
                 cursorProvider?.message,
-                "Cursor is disabled in TritonAI Code settings.",
+                "Cursor is disabled in TritonAI Harness settings.",
               );
               assert.strictEqual(cursorSpawned, false);
             }).pipe(Effect.provide(runtimeServices));
@@ -1624,7 +1624,7 @@ it.layer(Layer.mergeAll(NodeServices.layer, ServerSettingsService.layerTest(), T
           assert.strictEqual(status.enabled, false);
           assert.strictEqual(status.status, "disabled");
           assert.strictEqual(status.installed, false);
-          assert.strictEqual(status.message, "Codex is disabled in TritonAI Code settings.");
+          assert.strictEqual(status.message, "Codex is disabled in TritonAI Harness settings.");
         }),
       );
     });
diff --git a/apps/server/src/provider/Layers/ProviderService.ts b/apps/server/src/provider/Layers/ProviderService.ts
index c71fb3c9d2c..d034a883b38 100644
--- a/apps/server/src/provider/Layers/ProviderService.ts
+++ b/apps/server/src/provider/Layers/ProviderService.ts
@@ -556,7 +556,7 @@ const makeProviderService = Effect.fn("makeProviderService")(function* (
         if (!instanceInfo.enabled) {
           return yield* toValidationError(
             "ProviderService.startSession",
-            `Provider instance '${resolvedInstanceId}' is disabled in TritonAI Code settings.`,
+            `Provider instance '${resolvedInstanceId}' is disabled in TritonAI Harness settings.`,
           );
         }
         const persistedBinding = Option.getOrUndefined(yield* directory.getBinding(threadId));
diff --git a/apps/server/src/provider/providerMaintenanceRunner.ts b/apps/server/src/provider/providerMaintenanceRunner.ts
index d59a1093b96..c1b9e1b29a1 100644
--- a/apps/server/src/provider/providerMaintenanceRunner.ts
+++ b/apps/server/src/provider/providerMaintenanceRunner.ts
@@ -361,9 +361,9 @@ export const make = Effect.fn("ProviderMaintenanceRunner.make")(function* () {
                 startedAt,
                 finishedAt,
                 message: couldNotVerify
-                  ? "Update command completed, but TritonAI Code could not verify the provider version."
+                  ? "Update command completed, but TritonAI Harness could not verify the provider version."
                   : stillOutdated
-                    ? "Update command completed, but TritonAI Code still detects an outdated provider version."
+                    ? "Update command completed, but TritonAI Harness still detects an outdated provider version."
                     : "Provider updated.",
                 output: commandOutput(result),
               }),
diff --git a/apps/server/src/provider/providerStatusCache.test.ts b/apps/server/src/provider/providerStatusCache.test.ts
index b4376542f27..fd83c31dec8 100644
--- a/apps/server/src/provider/providerStatusCache.test.ts
+++ b/apps/server/src/provider/providerStatusCache.test.ts
@@ -159,7 +159,7 @@ it.layer(NodeServices.layer)("providerStatusCache", (it) => {
       version: null,
       status: "disabled",
       auth: { status: "unknown" },
-      message: "Codex is disabled in TritonAI Code settings.",
+      message: "Codex is disabled in TritonAI Harness settings.",
     });
 
     assert.deepStrictEqual(
diff --git a/apps/server/src/serverRuntimeStartup.ts b/apps/server/src/serverRuntimeStartup.ts
index 9732c3a1ebd..5e40e94edfb 100644
--- a/apps/server/src/serverRuntimeStartup.ts
+++ b/apps/server/src/serverRuntimeStartup.ts
@@ -452,7 +452,7 @@ export const makeServerRuntimeStartup = Effect.gen(function* () {
         const startupBrowserTarget = yield* resolveStartupBrowserTarget;
         if (serverConfig.mode !== "desktop") {
           yield* Effect.logInfo(
-            "Authentication required. Open TritonAI Code using the pairing URL.",
+            "Authentication required. Open TritonAI Harness using the pairing URL.",
           ).pipe(Effect.annotateLogs({ pairingUrl: startupBrowserTarget }));
         }
         yield* runStartupPhase("browser.open", maybeOpenBrowser(startupBrowserTarget));
diff --git a/apps/server/src/startupAccess.ts b/apps/server/src/startupAccess.ts
index 1357f70ef13..09e1a319c87 100644
--- a/apps/server/src/startupAccess.ts
+++ b/apps/server/src/startupAccess.ts
@@ -121,7 +121,7 @@ export const renderTerminalQrCode = (value: string, margin = 2): string => {
 
 export const formatHeadlessServeOutput = (accessInfo: HeadlessServeAccessInfo): string =>
   [
-    "TritonAI Code server is ready.",
+    "TritonAI Harness server is ready.",
     `Connection string: ${accessInfo.connectionString}`,
     `Token: ${accessInfo.token}`,
     `Pairing URL: ${accessInfo.pairingUrl}`,
diff --git a/apps/server/src/textGeneration/OpenCodeTextGeneration.ts b/apps/server/src/textGeneration/OpenCodeTextGeneration.ts
index db0a148f43b..dc78fc31136 100644
--- a/apps/server/src/textGeneration/OpenCodeTextGeneration.ts
+++ b/apps/server/src/textGeneration/OpenCodeTextGeneration.ts
@@ -260,7 +260,7 @@ export const makeOpenCodeTextGeneration = Effect.fn("makeOpenCodeTextGeneration"
               : {}),
           });
           const session = await client.session.create({
-            title: `TritonAI Code ${input.operation}`,
+            title: `TritonAI Harness ${input.operation}`,
             permission: [{ permission: "*", pattern: "*", action: "deny" }],
           });
           if (!session.data) {
diff --git a/apps/server/src/vcs/GitVcsDriver.ts b/apps/server/src/vcs/GitVcsDriver.ts
index 418c753daf2..39617ecc679 100644
--- a/apps/server/src/vcs/GitVcsDriver.ts
+++ b/apps/server/src/vcs/GitVcsDriver.ts
@@ -627,9 +627,9 @@ export const makeVcsDriverShape = Effect.fn("makeGitVcsDriverShape")(function* (
       const commitEnv: NodeJS.ProcessEnv = {
         ...process.env,
         GIT_INDEX_FILE: tempIndexPath,
-        GIT_AUTHOR_NAME: "TritonAI Code",
+        GIT_AUTHOR_NAME: "TritonAI Harness",
         GIT_AUTHOR_EMAIL: "t3code@users.noreply.github.com",
-        GIT_COMMITTER_NAME: "TritonAI Code",
+        GIT_COMMITTER_NAME: "TritonAI Harness",
         GIT_COMMITTER_EMAIL: "t3code@users.noreply.github.com",
       };
 
diff --git a/apps/web/index.html b/apps/web/index.html
index 876a0f3c4af..5c053148a18 100644
--- a/apps/web/index.html
+++ b/apps/web/index.html
@@ -92,13 +92,13 @@
         object-fit: contain;
       }
     </style>
-    <title>TritonAI Code</title>
+    <title>TritonAI Harness</title>
   </head>
   <body>
     <div id="root">
       <div id="boot-shell">
-        <div id="boot-shell-card" aria-label="TritonAI Code splash screen">
-          <img id="boot-shell-logo" src="/apple-touch-icon.png" alt="TritonAI Code" />
+        <div id="boot-shell-card" aria-label="TritonAI Harness splash screen">
+          <img id="boot-shell-logo" src="/apple-touch-icon.png" alt="TritonAI Harness" />
         </div>
       </div>
     </div>
diff --git a/apps/web/src/branding.test.ts b/apps/web/src/branding.test.ts
index 1ae8bd50b78..f3989757f20 100644
--- a/apps/web/src/branding.test.ts
+++ b/apps/web/src/branding.test.ts
@@ -20,9 +20,9 @@ describe("branding", () => {
       value: {
         desktopBridge: {
           getAppBranding: () => ({
-            baseName: "TritonAI Code",
+            baseName: "TritonAI Harness",
             stageLabel: "Nightly",
-            displayName: "TritonAI Code (Nightly)",
+            displayName: "TritonAI Harness (Nightly)",
           }),
         },
       },
@@ -30,9 +30,9 @@ describe("branding", () => {
 
     const branding = await import("./branding");
 
-    expect(branding.APP_BASE_NAME).toBe("TritonAI Code");
+    expect(branding.APP_BASE_NAME).toBe("TritonAI Harness");
     expect(branding.APP_STAGE_LABEL).toBe("Nightly");
-    expect(branding.APP_DISPLAY_NAME).toBe("TritonAI Code (Nightly)");
+    expect(branding.APP_DISPLAY_NAME).toBe("TritonAI Harness (Nightly)");
   });
 
   it("normalizes hosted app channel metadata", async () => {
@@ -43,7 +43,7 @@ describe("branding", () => {
     expect(branding.HOSTED_APP_CHANNEL).toBe("nightly");
     expect(branding.HOSTED_APP_CHANNEL_LABEL).toBe("Nightly");
     expect(branding.APP_STAGE_LABEL).toBe("Nightly");
-    expect(branding.APP_DISPLAY_NAME).toBe("TritonAI Code (Nightly)");
+    expect(branding.APP_DISPLAY_NAME).toBe("TritonAI Harness (Nightly)");
   });
 
   it("ignores unknown hosted app channels", async () => {
diff --git a/apps/web/src/branding.ts b/apps/web/src/branding.ts
index ce428339c51..efa40757739 100644
--- a/apps/web/src/branding.ts
+++ b/apps/web/src/branding.ts
@@ -15,7 +15,7 @@ export const HOSTED_APP_CHANNEL =
   hostedAppChannel === "latest" || hostedAppChannel === "nightly" ? hostedAppChannel : null;
 export const HOSTED_APP_CHANNEL_LABEL =
   HOSTED_APP_CHANNEL === "nightly" ? "Nightly" : HOSTED_APP_CHANNEL === "latest" ? "Latest" : null;
-export const APP_BASE_NAME = injectedDesktopAppBranding?.baseName ?? "TritonAI Code";
+export const APP_BASE_NAME = injectedDesktopAppBranding?.baseName ?? "TritonAI Harness";
 export const APP_STAGE_LABEL =
   injectedDesktopAppBranding?.stageLabel ??
   HOSTED_APP_CHANNEL_LABEL ??
diff --git a/apps/web/src/cloud/linkEnvironment.ts b/apps/web/src/cloud/linkEnvironment.ts
index cdc127566e6..f2af06e602b 100644
--- a/apps/web/src/cloud/linkEnvironment.ts
+++ b/apps/web/src/cloud/linkEnvironment.ts
@@ -84,7 +84,7 @@ function ensureRelayClientAvailable(
     if (status.status === "available") return;
     if (status.status === "unsupported") {
       return yield* new CloudEnvironmentLinkError({
-        message: `T3 Code cannot install the relay client automatically on ${status.platform}-${status.arch}.`,
+        message: `TritonAI Harness cannot install the relay client automatically on ${status.platform}-${status.arch}.`,
       });
     }
 
@@ -106,7 +106,7 @@ function ensureRelayClientAvailable(
       return yield* new CloudEnvironmentLinkError({
         message:
           installed.status === "unsupported"
-            ? `T3 Code cannot install the relay client automatically on ${installed.platform}-${installed.arch}.`
+            ? `TritonAI Harness cannot install the relay client automatically on ${installed.platform}-${installed.arch}.`
             : "The relay client is still unavailable after installation.",
       });
     }
diff --git a/apps/web/src/components/RightPanelTabs.tsx b/apps/web/src/components/RightPanelTabs.tsx
index ead306f7c90..0df1a21706a 100644
--- a/apps/web/src/components/RightPanelTabs.tsx
+++ b/apps/web/src/components/RightPanelTabs.tsx
@@ -50,7 +50,7 @@ interface RightPanelTabsProps {
 }
 
 const SURFACE_DISABLED_REASONS = {
-  browser: "Browser previews are only available in the T3 Code desktop app.",
+  browser: "Browser previews are only available in the TritonAI Harness desktop app.",
   files: "Files are only available when a project is open.",
   diff: "Diff is only available for server threads in Git repositories.",
 } as const;
diff --git a/apps/web/src/components/Sidebar.tsx b/apps/web/src/components/Sidebar.tsx
index e5ea133e23a..0fc96124df3 100644
--- a/apps/web/src/components/Sidebar.tsx
+++ b/apps/web/src/components/Sidebar.tsx
@@ -2681,7 +2681,7 @@ const SidebarChromeHeader = memo(function SidebarChromeHeader({
                 TritonAI
               </span>
               <span className="tritonai-wordmark-badge rounded-full px-1.5 py-0.5 text-[8px] font-medium uppercase tracking-[0.18em] transition-colors">
-                Code
+                Harness
               </span>
             </Link>
           }
diff --git a/apps/web/src/components/SplashScreen.tsx b/apps/web/src/components/SplashScreen.tsx
index d2021347f7d..fc10ddd18de 100644
--- a/apps/web/src/components/SplashScreen.tsx
+++ b/apps/web/src/components/SplashScreen.tsx
@@ -3,9 +3,13 @@ export function SplashScreen() {
     <div className="flex min-h-screen items-center justify-center bg-background">
       <div
         className="flex size-24 items-center justify-center"
-        aria-label="TritonAI Code splash screen"
+        aria-label="TritonAI Harness splash screen"
       >
-        <img alt="TritonAI Code" className="size-16 object-contain" src="/apple-touch-icon.png" />
+        <img
+          alt="TritonAI Harness"
+          className="size-16 object-contain"
+          src="/apple-touch-icon.png"
+        />
       </div>
     </div>
   );
diff --git a/apps/web/src/components/clerk/DesktopClerkSignIn.tsx b/apps/web/src/components/clerk/DesktopClerkSignIn.tsx
index dc8b432e1c7..d7e606f30a3 100644
--- a/apps/web/src/components/clerk/DesktopClerkSignIn.tsx
+++ b/apps/web/src/components/clerk/DesktopClerkSignIn.tsx
@@ -51,7 +51,7 @@ export function DesktopClerkSignInCard({
       }
     >
       <DesktopClerkHeader
-        title="Sign in to T3 Code"
+        title="Sign in to TritonAI Harness"
         subtitle="Welcome back! Please sign in to continue"
       />
       {oauthOptions.length === 0 ? (
diff --git a/apps/web/src/components/cloud/RelayClientInstallDialog.tsx b/apps/web/src/components/cloud/RelayClientInstallDialog.tsx
index 78282f65915..0f9ea7ae956 100644
--- a/apps/web/src/components/cloud/RelayClientInstallDialog.tsx
+++ b/apps/web/src/components/cloud/RelayClientInstallDialog.tsx
@@ -69,8 +69,8 @@ export function RelayClientInstallDialog() {
           </DialogTitle>
           <DialogDescription>
             {isInstalling
-              ? "T3 Code is preparing this environment for secure access through T3 Connect."
-              : "T3 Code needs the relay client to make this environment available through T3 Connect."}
+              ? "TritonAI Harness is preparing this environment for secure access through T3 Connect."
+              : "TritonAI Harness needs the relay client to make this environment available through T3 Connect."}
           </DialogDescription>
         </DialogHeader>
         <DialogPanel scrollFade={false}>
@@ -91,14 +91,14 @@ export function RelayClientInstallDialog() {
                 value={activeStepIndex + 1}
               />
               <p className="text-xs leading-relaxed text-muted-foreground">
-                Keep T3 Code open while the relay client is installed.
+                Keep TritonAI Harness open while the relay client is installed.
               </p>
             </div>
           ) : (
             <div className="rounded-xl border border-border/70 bg-muted/35 p-3">
               <p className="text-sm font-medium text-foreground">Managed relay client</p>
               <p className="mt-1 text-sm leading-relaxed text-muted-foreground">
-                T3 Code will download and install version{" "}
+                TritonAI Harness will download and install version{" "}
                 {view.status === "confirming" ? view.version : ""} locally.
               </p>
             </div>
diff --git a/apps/web/src/components/desktop/SshPasswordPromptDialog.tsx b/apps/web/src/components/desktop/SshPasswordPromptDialog.tsx
index 4b413a67cd4..a62853e9680 100644
--- a/apps/web/src/components/desktop/SshPasswordPromptDialog.tsx
+++ b/apps/web/src/components/desktop/SshPasswordPromptDialog.tsx
@@ -161,7 +161,7 @@ export function SshPasswordPromptDialog() {
           <DialogDescription>
             T3 needs your SSH password to connect to{" "}
             {target ? <code>{target}</code> : "the remote host"}. The password is passed to the
-            local SSH process for this connection attempt and is not saved by TritonAI Code.
+            local SSH process for this connection attempt and is not saved by TritonAI Harness.
           </DialogDescription>
         </DialogHeader>
         <DialogPanel className="space-y-3" scrollFade={false}>
diff --git a/apps/web/src/components/desktopUpdate.logic.test.ts b/apps/web/src/components/desktopUpdate.logic.test.ts
index 5ad031f49bb..0692c21cf7d 100644
--- a/apps/web/src/components/desktopUpdate.logic.test.ts
+++ b/apps/web/src/components/desktopUpdate.logic.test.ts
@@ -213,7 +213,7 @@ describe("desktop update UI helpers", () => {
         availableVersion: "1.1.0",
         downloadedVersion: "1.1.1",
       }),
-    ).toContain("Install update 1.1.1 and restart TritonAI Code?");
+    ).toContain("Install update 1.1.1 and restart TritonAI Harness?");
   });
 
   it("falls back to generic install confirmation copy when no version is available", () => {
@@ -222,7 +222,7 @@ describe("desktop update UI helpers", () => {
         availableVersion: null,
         downloadedVersion: null,
       }),
-    ).toContain("Install update and restart TritonAI Code?");
+    ).toContain("Install update and restart TritonAI Harness?");
   });
 });
 
diff --git a/apps/web/src/components/desktopUpdate.logic.ts b/apps/web/src/components/desktopUpdate.logic.ts
index ccaab1ce5d4..5e0b98fbe59 100644
--- a/apps/web/src/components/desktopUpdate.logic.ts
+++ b/apps/web/src/components/desktopUpdate.logic.ts
@@ -44,12 +44,12 @@ export function getArm64IntelBuildWarningDescription(state: DesktopUpdateState):
 
   const action = resolveDesktopUpdateButtonAction(state);
   if (action === "download") {
-    return "This Mac has Apple Silicon, but TritonAI Code is still running the Intel build under Rosetta. Download the available update to switch to the native Apple Silicon build.";
+    return "This Mac has Apple Silicon, but TritonAI Harness is still running the Intel build under Rosetta. Download the available update to switch to the native Apple Silicon build.";
   }
   if (action === "install") {
-    return "This Mac has Apple Silicon, but TritonAI Code is still running the Intel build under Rosetta. Restart to install the downloaded Apple Silicon build.";
+    return "This Mac has Apple Silicon, but TritonAI Harness is still running the Intel build under Rosetta. Restart to install the downloaded Apple Silicon build.";
   }
-  return "This Mac has Apple Silicon, but TritonAI Code is still running the Intel build under Rosetta. The next app update will replace it with the native Apple Silicon build.";
+  return "This Mac has Apple Silicon, but TritonAI Harness is still running the Intel build under Rosetta. The next app update will replace it with the native Apple Silicon build.";
 }
 
 export function getDesktopUpdateButtonTooltip(state: DesktopUpdateState): string {
@@ -80,7 +80,7 @@ export function getDesktopUpdateInstallConfirmationMessage(
   state: Pick<DesktopUpdateState, "availableVersion" | "downloadedVersion">,
 ): string {
   const version = state.downloadedVersion ?? state.availableVersion;
-  return `Install update${version ? ` ${version}` : ""} and restart TritonAI Code?\n\nAny running tasks will be interrupted. Make sure you're ready before continuing.`;
+  return `Install update${version ? ` ${version}` : ""} and restart TritonAI Harness?\n\nAny running tasks will be interrupted. Make sure you're ready before continuing.`;
 }
 
 export function getDesktopUpdateActionError(result: DesktopUpdateActionResult): string | null {
diff --git a/apps/web/src/components/preview/PreviewPanel.tsx b/apps/web/src/components/preview/PreviewPanel.tsx
index 92db1c2cd9b..a40ae64cf1d 100644
--- a/apps/web/src/components/preview/PreviewPanel.tsx
+++ b/apps/web/src/components/preview/PreviewPanel.tsx
@@ -21,7 +21,7 @@ export function PreviewPanel({ mode, threadRef, tabId, configuredUrls, visible }
       <PreviewPanelShell mode={mode}>
         <div className="flex min-h-0 flex-1 flex-col items-center justify-center gap-3 p-8 text-center">
           <p className="max-w-sm text-sm text-muted-foreground">
-            Preview is only available in the T3 Code desktop app.
+            Preview is only available in the TritonAI Harness desktop app.
           </p>
         </div>
       </PreviewPanelShell>
diff --git a/apps/web/src/components/settings/ConnectionsSettings.tsx b/apps/web/src/components/settings/ConnectionsSettings.tsx
index 13698b0e9f0..a66681aefb2 100644
--- a/apps/web/src/components/settings/ConnectionsSettings.tsx
+++ b/apps/web/src/components/settings/ConnectionsSettings.tsx
@@ -3035,8 +3035,8 @@ export function ConnectionsSettings() {
                 </AlertDialogTitle>
                 <AlertDialogDescription>
                   {pendingDesktopServerExposureMode === "network-accessible"
-                    ? "TritonAI Code will restart to expose this environment over the network."
-                    : "TritonAI Code will restart and limit this environment back to this machine."}
+                    ? "TritonAI Harness will restart to expose this environment over the network."
+                    : "TritonAI Harness will restart and limit this environment back to this machine."}
                 </AlertDialogDescription>
               </AlertDialogHeader>
               <AlertDialogFooter>
@@ -3080,7 +3080,7 @@ export function ConnectionsSettings() {
               <AlertDialogHeader>
                 <AlertDialogTitle>Disable Tailscale HTTPS?</AlertDialogTitle>
                 <AlertDialogDescription>
-                  TritonAI Code will restart the local backend without Tailscale Serve.
+                  TritonAI Harness will restart the local backend without Tailscale Serve.
                 </AlertDialogDescription>
               </AlertDialogHeader>
               <AlertDialogFooter>
@@ -3118,8 +3118,8 @@ export function ConnectionsSettings() {
               <DialogHeader>
                 <DialogTitle>Set up Tailscale HTTPS?</DialogTitle>
                 <DialogDescription>
-                  TritonAI Code will restart the local backend with Tailscale Serve enabled and ask
-                  Tailscale to proxy HTTPS traffic to this backend.
+                  TritonAI Harness will restart the local backend with Tailscale Serve enabled and
+                  ask Tailscale to proxy HTTPS traffic to this backend.
                 </DialogDescription>
               </DialogHeader>
               <DialogPanel className="space-y-4">
diff --git a/apps/web/src/components/settings/KeybindingsSettings.tsx b/apps/web/src/components/settings/KeybindingsSettings.tsx
index f80a2e96896..67498c8de83 100644
--- a/apps/web/src/components/settings/KeybindingsSettings.tsx
+++ b/apps/web/src/components/settings/KeybindingsSettings.tsx
@@ -246,8 +246,8 @@ function UnknownWhenVariableWarning({
         }
       />
       <TooltipPopup side="top" className="max-w-72 whitespace-normal leading-relaxed">
-        TritonAI Code does not recognize this condition yet. It can still be saved, but it may not
-        match unless the runtime provides it.
+        TritonAI Harness does not recognize this condition yet. It can still be saved, but it may
+        not match unless the runtime provides it.
       </TooltipPopup>
     </Tooltip>
   );
@@ -1238,8 +1238,8 @@ export function KeybindingsSettingsPanel() {
           <div className="flex items-start gap-2 border-b border-warning/20 bg-warning/5 px-3 py-2.5 text-[12px] leading-relaxed text-muted-foreground sm:px-4">
             <InfoIcon className="mt-0.5 size-3.5 shrink-0 text-warning" />
             <p>
-              Some shortcuts may be claimed by the browser before TritonAI Code sees them. Use the
-              desktop app for better keybinding support.
+              Some shortcuts may be claimed by the browser before TritonAI Harness sees them. Use
+              the desktop app for better keybinding support.
             </p>
           </div>
         ) : null}
diff --git a/apps/web/src/components/settings/SettingsPanels.browser.tsx b/apps/web/src/components/settings/SettingsPanels.browser.tsx
index 208749f2264..e8a20e47c12 100644
--- a/apps/web/src/components/settings/SettingsPanels.browser.tsx
+++ b/apps/web/src/components/settings/SettingsPanels.browser.tsx
@@ -1073,7 +1073,9 @@ describe("GeneralSettingsPanel observability", () => {
     await expect.element(page.getByText("Enable network access?")).toBeInTheDocument();
     await expect
       .element(
-        page.getByText("TritonAI Code will restart to expose this environment over the network."),
+        page.getByText(
+          "TritonAI Harness will restart to expose this environment over the network.",
+        ),
       )
       .toBeInTheDocument();
     await page.getByRole("button", { name: "Restart and enable", exact: true }).click();
diff --git a/apps/web/src/components/settings/SettingsPanels.tsx b/apps/web/src/components/settings/SettingsPanels.tsx
index 547da97c3a4..0ad0f7841f4 100644
--- a/apps/web/src/components/settings/SettingsPanels.tsx
+++ b/apps/web/src/components/settings/SettingsPanels.tsx
@@ -536,7 +536,7 @@ export function GeneralSettingsPanel() {
       <SettingsSection title="General">
         <SettingsRow
           title="Theme"
-          description="Choose how TritonAI Code looks across the app."
+          description="Choose how TritonAI Harness looks across the app."
           resetAction={
             theme !== DEFAULT_THEME ? (
               <SettingResetButton label="theme" onClick={() => setTheme(DEFAULT_THEME)} />
diff --git a/apps/web/src/components/settings/providerStatus.ts b/apps/web/src/components/settings/providerStatus.ts
index 57a604da09f..f5a7eb8cab2 100644
--- a/apps/web/src/components/settings/providerStatus.ts
+++ b/apps/web/src/components/settings/providerStatus.ts
@@ -40,7 +40,7 @@ export function getProviderSummary(provider: ServerProvider | undefined) {
       headline: "Disabled",
       detail:
         provider.message ??
-        "This provider is installed but disabled for new sessions in TritonAI Code.",
+        "This provider is installed but disabled for new sessions in TritonAI Harness.",
     };
   }
   if (!provider.installed) {
diff --git a/apps/web/src/firstRunOnboarding.test.ts b/apps/web/src/firstRunOnboarding.test.ts
index 07d6f2a458b..25ed361f4ab 100644
--- a/apps/web/src/firstRunOnboarding.test.ts
+++ b/apps/web/src/firstRunOnboarding.test.ts
@@ -13,9 +13,9 @@ import {
 } from "./firstRunOnboarding";
 
 describe("firstRunOnboarding", () => {
-  it("is scoped to the TritonAI Code brand", () => {
-    expect(isTritonAiCodeBrand("TritonAI Code")).toBe(true);
-    expect(isTritonAiCodeBrand("T3 Code")).toBe(false);
+  it("is scoped to the TritonAI Harness brand", () => {
+    expect(isTritonAiCodeBrand("TritonAI Harness")).toBe(true);
+    expect(isTritonAiCodeBrand("TritonAI Code")).toBe(false);
   });
 
   it("uses the installer-created TritonAI home workspace", () => {
diff --git a/apps/web/src/routes/_chat.tsx b/apps/web/src/routes/_chat.tsx
index f28c80f0128..f8ad2303b1e 100644
--- a/apps/web/src/routes/_chat.tsx
+++ b/apps/web/src/routes/_chat.tsx
@@ -102,7 +102,7 @@ function ChatRouteGlobalShortcuts() {
             stackedThreadToast({
               type: "info",
               title: "Preview is desktop-only",
-              description: "Open T3 Code in the desktop app to use the in-app preview.",
+              description: "Open TritonAI Harness in the desktop app to use the in-app preview.",
             }),
           );
           return;
diff --git a/apps/web/src/tritonAiWorkspace.ts b/apps/web/src/tritonAiWorkspace.ts
index 42907fe917a..c59a94eb76d 100644
--- a/apps/web/src/tritonAiWorkspace.ts
+++ b/apps/web/src/tritonAiWorkspace.ts
@@ -1,9 +1,9 @@
-export const TRITONAI_FIRST_RUN_PROMPT = "How does TritonAI Code work, and how can it help me?";
+export const TRITONAI_FIRST_RUN_PROMPT = "How does TritonAI Harness work, and how can it help me?";
 export const TRITONAI_FIRST_RUN_WORKSPACE = "~/TritonAI";
 export const TRITONAI_CHATS_WORKSPACE = "~/.agents/ucsd/state/tritonai-code/chats";
 export const TRITONAI_CHATS_PROJECT_TITLE = "Chats";
 
-const TRITONAI_APP_BASE_NAME = "TritonAI Code";
+const TRITONAI_APP_BASE_NAME = "TritonAI Harness";
 
 export function isTritonAiCodeBrand(appBaseName: string): boolean {
   return appBaseName.trim() === TRITONAI_APP_BASE_NAME;
diff --git a/apps/web/src/versionSkew.test.ts b/apps/web/src/versionSkew.test.ts
index 9cea141f50f..045057becf4 100644
--- a/apps/web/src/versionSkew.test.ts
+++ b/apps/web/src/versionSkew.test.ts
@@ -20,7 +20,7 @@ describe("versionSkew", () => {
     expect(resolveVersionMismatch("9.9.9")).toEqual({
       clientVersion: APP_VERSION,
       serverVersion: "9.9.9",
-      hint: "Version mismatch. Try syncing the client and server to the same TritonAI Code version.",
+      hint: "Version mismatch. Try syncing the client and server to the same TritonAI Harness version.",
     });
   });
 
@@ -72,7 +72,7 @@ describe("versionSkew", () => {
     const mismatch = resolveVersionMismatch("9.9.9");
 
     expect(appendVersionMismatchHint("Socket closed.", mismatch)).toBe(
-      "Socket closed. Hint: Version mismatch. Try syncing the client and server to the same TritonAI Code version.",
+      "Socket closed. Hint: Version mismatch. Try syncing the client and server to the same TritonAI Harness version.",
     );
   });
 });
diff --git a/apps/web/src/versionSkew.ts b/apps/web/src/versionSkew.ts
index d2d9c10c473..9d055a596ae 100644
--- a/apps/web/src/versionSkew.ts
+++ b/apps/web/src/versionSkew.ts
@@ -39,7 +39,7 @@ export function resolveVersionMismatch(
   return {
     clientVersion: normalizedClientVersion,
     serverVersion: normalizedServerVersion,
-    hint: "Version mismatch. Try syncing the client and server to the same TritonAI Code version.",
+    hint: "Version mismatch. Try syncing the client and server to the same TritonAI Harness version.",
   };
 }
 
diff --git a/packages/contracts/src/relay.ts b/packages/contracts/src/relay.ts
index 5c8cc1ad001..88012461872 100644
--- a/packages/contracts/src/relay.ts
+++ b/packages/contracts/src/relay.ts
@@ -1006,7 +1006,7 @@ export const RelayApi = HttpApi.make("RelayApi")
     RelayDpopClientGroup,
     RelayServerGroup,
   )
-  .annotate(OpenApi.Title, "T3 Code Relay API")
+  .annotate(OpenApi.Title, "TritonAI Harness Relay API")
   .annotate(OpenApi.Version, "1.0.0")
   .annotate(
     OpenApi.Description,
diff --git a/packages/contracts/src/settings.ts b/packages/contracts/src/settings.ts
index 2f03b23cb4d..f3d7206a183 100644
--- a/packages/contracts/src/settings.ts
+++ b/packages/contracts/src/settings.ts
@@ -348,7 +348,7 @@ export const OpenCodeSettings = makeProviderSettingsSchema(
       Schema.withDecodingDefault(Effect.succeed("")),
       Schema.annotateKey({
         title: "Server URL",
-        description: "Leave blank to let TritonAI Code spawn the server when needed.",
+        description: "Leave blank to let TritonAI Harness spawn the server when needed.",
         providerSettingsForm: {
           placeholder: "http://127.0.0.1:4096",
           clearWhenEmpty: "omit",
diff --git a/packages/ssh/src/auth.ts b/packages/ssh/src/auth.ts
index 180689e10df..d7f73d82891 100644
--- a/packages/ssh/src/auth.ts
+++ b/packages/ssh/src/auth.ts
@@ -72,14 +72,14 @@ function joinSshAskpassPath(
 }
 
 export const ASKPASS_POSIX_SCRIPT = `#!/bin/sh
-# Invoked by ssh via SSH_ASKPASS when TritonAI Code re-runs ssh with a cached password
+# Invoked by ssh via SSH_ASKPASS when TritonAI Harness re-runs ssh with a cached password
 # from the renderer's in-app prompt. We never expose a native dialog here - if
 # T3_SSH_AUTH_SECRET is missing, that's a caller bug and we fail loudly.
 if [ "\${T3_SSH_AUTH_SECRET+x}" = "x" ]; then
   printf "%s\\n" "$T3_SSH_AUTH_SECRET"
   exit 0
 fi
-printf 'TritonAI Code ssh-askpass invoked without T3_SSH_AUTH_SECRET.\\n' >&2
+printf 'TritonAI Harness ssh-askpass invoked without T3_SSH_AUTH_SECRET.\\n' >&2
 exit 1
 `;
 
@@ -87,7 +87,7 @@ export const ASKPASS_WINDOWS_LAUNCHER_SCRIPT = `@echo off\r
 powershell -NoProfile -ExecutionPolicy Bypass -File "%~dp0ssh-askpass.ps1" %*\r
 `;
 
-export const ASKPASS_WINDOWS_SCRIPT = `# Invoked by ssh via SSH_ASKPASS (through ssh-askpass.cmd) when TritonAI Code re-runs\r
+export const ASKPASS_WINDOWS_SCRIPT = `# Invoked by ssh via SSH_ASKPASS (through ssh-askpass.cmd) when TritonAI Harness re-runs\r
 # ssh with a cached password from the renderer's in-app prompt. We never expose\r
 # a native dialog here - if T3_SSH_AUTH_SECRET is missing, that's a caller bug\r
 # and we fail loudly.\r
@@ -95,7 +95,7 @@ if ($null -ne $env:T3_SSH_AUTH_SECRET) {\r
   [Console]::Out.WriteLine($env:T3_SSH_AUTH_SECRET)\r
   exit 0\r
 }\r
-[Console]::Error.WriteLine("TritonAI Code ssh-askpass invoked without T3_SSH_AUTH_SECRET.")\r
+[Console]::Error.WriteLine("TritonAI Harness ssh-askpass invoked without T3_SSH_AUTH_SECRET.")\r
 exit 1\r
 `;
 
diff --git a/scripts/build-desktop-artifact.test.ts b/scripts/build-desktop-artifact.test.ts
index 5008a9a32bd..12ba6fe0262 100644
--- a/scripts/build-desktop-artifact.test.ts
+++ b/scripts/build-desktop-artifact.test.ts
@@ -30,10 +30,10 @@ it.layer(NodeServices.layer)("build-desktop-artifact", (it) => {
   });
 
   it("switches desktop packaging product names to nightly for nightly builds", () => {
-    assert.equal(resolveDesktopProductName("0.0.17"), "TritonAI Code");
+    assert.equal(resolveDesktopProductName("0.0.17"), "TritonAI Harness");
     assert.equal(
       resolveDesktopProductName("0.0.17-nightly.20260413.42"),
-      "TritonAI Code (Nightly)",
+      "TritonAI Harness (Nightly)",
     );
   });
 
diff --git a/scripts/build-desktop-artifact.ts b/scripts/build-desktop-artifact.ts
index 691d1e9b611..b04c5e5e4c9 100644
--- a/scripts/build-desktop-artifact.ts
+++ b/scripts/build-desktop-artifact.ts
@@ -738,8 +738,8 @@ export function resolveMockUpdateServerUrl(mockUpdateServerPort: number | undefi
 
 export function resolveDesktopProductName(version: string): string {
   return resolveDesktopUpdateChannel(version) === "nightly"
-    ? "TritonAI Code (Nightly)"
-    : (desktopPackageJson.productName ?? "TritonAI Code");
+    ? "TritonAI Harness (Nightly)"
+    : (desktopPackageJson.productName ?? "TritonAI Harness");
 }
 
 const createBuildConfig = Effect.fn("createBuildConfig")(function* (
@@ -753,7 +753,7 @@ const createBuildConfig = Effect.fn("createBuildConfig")(function* (
   const buildConfig: Record<string, unknown> = {
     appId: TRITONAI_DESKTOP_APP_ID,
     productName: resolveDesktopProductName(version),
-    artifactName: "T3-Code-${version}-${arch}.${ext}",
+    artifactName: "TritonAI-Harness-${version}-${arch}.${ext}",
     asarUnpack: [...DESKTOP_ASAR_UNPACK],
     directories: {
       buildResources: "apps/desktop/resources",
@@ -779,7 +779,7 @@ const createBuildConfig = Effect.fn("createBuildConfig")(function* (
       category: "public.app-category.developer-tools",
       protocols: [
         {
-          name: "TritonAI Code",
+          name: "TritonAI Harness",
           schemes: ["t3code"],
         },
       ],
@@ -976,7 +976,7 @@ const buildDesktopArtifact = Effect.fn("buildDesktopArtifact")(function* (
     t3codeCommitHash: commitHash,
     private: true,
     packageManager: rootPackageJson.packageManager,
-    description: "TritonAI Code desktop build",
+    description: "TritonAI Harness desktop build",
     author: "T3 Tools",
     main: "apps/desktop/dist-electron/main.cjs",
     build: yield* createBuildConfig(
@@ -1168,7 +1168,7 @@ const buildDesktopArtifactCli = Command.make("build-desktop-artifact", {
     Flag.optional,
   ),
 }).pipe(
-  Command.withDescription("Build a desktop artifact for TritonAI Code."),
+  Command.withDescription("Build a desktop artifact for TritonAI Harness."),
   Command.withHandler((input) => Effect.flatMap(resolveBuildOptions(input), buildDesktopArtifact)),
 );
 
diff --git a/scripts/dev-runner.ts b/scripts/dev-runner.ts
index d26281f3ceb..8b138a94dc6 100644
--- a/scripts/dev-runner.ts
+++ b/scripts/dev-runner.ts
@@ -490,7 +490,9 @@ const devRunnerCli = Command.make("dev-runner", {
     Argument.withDescription("Development mode to run."),
   ),
   t3Home: Flag.string("home-dir").pipe(
-    Flag.withDescription("Base directory for all TritonAI Code data (equivalent to T3CODE_HOME)."),
+    Flag.withDescription(
+      "Base directory for all TritonAI Harness data (equivalent to T3CODE_HOME).",
+    ),
     Flag.withFallbackConfig(optionalStringConfig("T3CODE_HOME")),
   ),
   noBrowser: Flag.boolean("no-browser").pipe(