diff --git a/docs/SYNC.md b/docs/SYNC.md
index 20d2d89..f711883 100644
--- a/docs/SYNC.md
+++ b/docs/SYNC.md
@@ -167,6 +167,7 @@ yyyy-mm-dd  @handle  T-x.y  what was done
 ```
 
 ```
+2026-05-15  @jay  T-1.0  Server refactor scaffold. server/ dir with legacy-server.ts, route placeholders, upgrade.ts. index.ts updated. Legacy files tagged.
 2026-05-15  @worker-phase0  T-0.*  Phase 0 spike complete. tmux+pipe-pane PoC validated. GREEN LIGHT for Phase 1. Report: reference/PHASE-0-report.md. Branch: feat/spike-stream (kept for reference, not merged).
 2026-05-15  @worker-phase0.5  T-0.5  Phase 0.5 spike complete. tmux control mode validated. VERDICT: Path B recommended. Report: reference/PHASE-0.5-report.md. Branch: feat/spike-tmux-cc (kept for reference, not merged).
 ```
diff --git a/extensions/remote-control/auth.ts b/extensions/remote-control/auth.ts
index 9d7ac7b..29feb6a 100644
--- a/extensions/remote-control/auth.ts
+++ b/extensions/remote-control/auth.ts
@@ -1,3 +1,4 @@
+// LEGACY: to be removed after auth/ refactor (T-1.3)
 /**
  * Authentication helpers for remote-control.
  *
diff --git a/extensions/remote-control/config.ts b/extensions/remote-control/config.ts
index 91fc99c..0ee7967 100644
--- a/extensions/remote-control/config.ts
+++ b/extensions/remote-control/config.ts
@@ -1,3 +1,4 @@
+// LEGACY: to be replaced by T-1.7 config
 /**
  * Configuration management for remote-control.
  *
diff --git a/extensions/remote-control/html.ts b/extensions/remote-control/html.ts
index 7abd0bd..2644b60 100644
--- a/extensions/remote-control/html.ts
+++ b/extensions/remote-control/html.ts
@@ -1,3 +1,4 @@
+// LEGACY: to be removed after Phase 2
 /**
  * Inline web UI for remote-control.
  *
diff --git a/extensions/remote-control/index.ts b/extensions/remote-control/index.ts
index b4e074b..40b2ca0 100644
--- a/extensions/remote-control/index.ts
+++ b/extensions/remote-control/index.ts
@@ -23,7 +23,7 @@ import {
   readRemoteControlConfig,
 } from "./config.js";
 import { type RawMessage, serializeMessage } from "./messages.js";
-import { type RemoteServer, startServer } from "./server.js";
+import { type RemoteServer, startServer } from "./server/server.js";
 
 // ── Extension entry point ────────────────────────────────────────────────────
 
diff --git a/extensions/remote-control/messages.ts b/extensions/remote-control/messages.ts
index 975b362..9a525d7 100644
--- a/extensions/remote-control/messages.ts
+++ b/extensions/remote-control/messages.ts
@@ -1,3 +1,4 @@
+// LEGACY: to be removed after Phase 2
 /**
  * Wire protocol types and message serialization for remote-control.
  *
diff --git a/extensions/remote-control/server.ts b/extensions/remote-control/server/legacy-server.ts
similarity index 99%
rename from extensions/remote-control/server.ts
rename to extensions/remote-control/server/legacy-server.ts
index a9f52cc..201728d 100644
--- a/extensions/remote-control/server.ts
+++ b/extensions/remote-control/server/legacy-server.ts
@@ -1,3 +1,4 @@
+// LEGACY: to be removed after Phase 2 — replaced by server/server.ts + route modules
 /**
  * HTTP + WebSocket server for remote-control.
  *
diff --git a/extensions/remote-control/server/routes/commands.ts b/extensions/remote-control/server/routes/commands.ts
new file mode 100644
index 0000000..ee45179
--- /dev/null
+++ b/extensions/remote-control/server/routes/commands.ts
@@ -0,0 +1,6 @@
+// LEGACY placeholder — to be filled in by T-1.6 (slash-command registry)
+import type { Express } from "express";
+
+export function registerCommandsRoutes(_app: Express): void {
+  // TODO T-1.6: S-08 slash-command registry endpoint
+}
diff --git a/extensions/remote-control/server/routes/health.ts b/extensions/remote-control/server/routes/health.ts
new file mode 100644
index 0000000..9b627f9
--- /dev/null
+++ b/extensions/remote-control/server/routes/health.ts
@@ -0,0 +1,6 @@
+// LEGACY placeholder — to be filled in by T-1.7 (health endpoint)
+import type { Express } from "express";
+
+export function registerHealthRoutes(_app: Express): void {
+  // TODO T-1.7: S-12 health endpoint
+}
diff --git a/extensions/remote-control/server/routes/input.ts b/extensions/remote-control/server/routes/input.ts
new file mode 100644
index 0000000..84ee1c1
--- /dev/null
+++ b/extensions/remote-control/server/routes/input.ts
@@ -0,0 +1,6 @@
+// LEGACY placeholder — to be filled in by T-1.5 (input/send-keys route)
+import type { Express } from "express";
+
+export function registerInputRoutes(_app: Express): void {
+  // TODO T-1.5: S-03 send-keys endpoint
+}
diff --git a/extensions/remote-control/server/routes/sessions.ts b/extensions/remote-control/server/routes/sessions.ts
new file mode 100644
index 0000000..39334f0
--- /dev/null
+++ b/extensions/remote-control/server/routes/sessions.ts
@@ -0,0 +1,6 @@
+// LEGACY placeholder — to be filled in by T-1.6 (multi-session CRUD)
+import type { Express } from "express";
+
+export function registerSessionsRoutes(_app: Express): void {
+  // TODO T-1.6: S-09 sessions lifecycle endpoint
+}
diff --git a/extensions/remote-control/server/routes/side.ts b/extensions/remote-control/server/routes/side.ts
new file mode 100644
index 0000000..1436444
--- /dev/null
+++ b/extensions/remote-control/server/routes/side.ts
@@ -0,0 +1,6 @@
+// LEGACY placeholder — to be filled in by T-1.6 (state side-channel)
+import type { Express } from "express";
+
+export function registerSideRoutes(_app: Express): void {
+  // TODO T-1.6: S-07 state side-channel endpoint
+}
diff --git a/extensions/remote-control/server/routes/stream.ts b/extensions/remote-control/server/routes/stream.ts
new file mode 100644
index 0000000..cba883a
--- /dev/null
+++ b/extensions/remote-control/server/routes/stream.ts
@@ -0,0 +1,6 @@
+// LEGACY placeholder — to be filled in by T-1.5 (stream + binary stream + sequence)
+import type { Express } from "express";
+
+export function registerStreamRoutes(_app: Express): void {
+  // TODO T-1.5: S-02 binary stream, S-04 sequence resume, S-05 snapshot
+}
diff --git a/extensions/remote-control/server/server.ts b/extensions/remote-control/server/server.ts
new file mode 100644
index 0000000..66960bc
--- /dev/null
+++ b/extensions/remote-control/server/server.ts
@@ -0,0 +1,19 @@
+/**
+ * Server bootstrap — Phase 1 scaffold (T-1.0).
+ *
+ * Creates the HTTP + WebSocket server and wires up legacy routes.
+ * Route placeholders will be populated by T-1.5 / T-1.6 / T-1.7.
+ */
+import type {
+  ExtensionAPI,
+  ExtensionContext,
+} from "@earendil-works/pi-coding-agent";
+import { startServer as startLegacyServer } from "./legacy-server.js";
+export type { RemoteServer } from "./legacy-server.js";
+
+/**
+ * Start the remote-control server.
+ * Currently delegates to the legacy server; route modules will be
+ * wired in during T-1.5 – T-1.7.
+ */
+export { startLegacyServer as startServer };
diff --git a/extensions/remote-control/server/upgrade.ts b/extensions/remote-control/server/upgrade.ts
new file mode 100644
index 0000000..cb8986f
--- /dev/null
+++ b/extensions/remote-control/server/upgrade.ts
@@ -0,0 +1,31 @@
+// Legacy WebSocket upgrade routing — to be replaced in T-1.5/T-1.6.
+import type { IncomingMessage } from "node:http";
+import type { Socket } from "node:net";
+
+// Lightweight ws server interface (compatible with the ws package without types)
+interface WsServer {
+  handleUpgrade(
+    request: IncomingMessage,
+    socket: Socket,
+    head: Buffer,
+    cb: (ws: unknown) => void,
+  ): void;
+  emit(event: string, ...args: unknown[]): void;
+}
+
+/**
+ * Route WebSocket upgrade requests to the legacy server.
+ * In Phase 2 this will dispatch to topic/session-specific handlers.
+ */
+export function handleUpgrade(
+  wss: WsServer,
+  request: IncomingMessage,
+  socket: Socket,
+  head: Buffer,
+): void {
+  // T-1.5/T-1.6: inspect URL to route to stream/input/session handlers.
+  // For now, delegate everything to the legacy WebSocket server.
+  wss.handleUpgrade(request, socket, head, (ws) => {
+    wss.emit("connection", ws, request);
+  });
+}