diff --git a/apps/web/src/components/app-shell.tsx b/apps/web/src/components/app-shell.tsx
index 3d924b6..54aee87 100644
--- a/apps/web/src/components/app-shell.tsx
+++ b/apps/web/src/components/app-shell.tsx
@@ -14,6 +14,7 @@ import { EventToastBridge } from "./event-toast-bridge";
 import { NotificationCenter } from "./notification-center";
 import { Icon } from "./icon";
 import { MobileNav } from "./mobile-nav";
+import { StartToolFAB } from "./start-tool-fab";
 import type { IconName } from "../utils/icons";
 
 const NAV_ITEMS: {
@@ -170,6 +171,7 @@ export const AppShell = () => {
 								}
 							/>
 						)}
+						<StartToolFAB />
 					</div>
 				</NotificationProvider>
 			</ToastProvider>
diff --git a/apps/web/src/components/start-tool-fab.tsx b/apps/web/src/components/start-tool-fab.tsx
new file mode 100644
index 0000000..4741fb7
--- /dev/null
+++ b/apps/web/src/components/start-tool-fab.tsx
@@ -0,0 +1,123 @@
+/** Floating action button to start a tool from any page. */
+
+import { useState } from "react";
+import { Icon } from "./icon";
+import { ToolStarter } from "./tool-starter";
+import type { Workspace } from "../types/workspace";
+import { listAllWorkspaces } from "../api/workspaces";
+
+export function StartToolFAB() {
+	const [open, setOpen] = useState(false);
+	const [workspaces, setWorkspaces] = useState<Workspace[]>([]);
+	const [workspacesLoading, setWorkspacesLoading] = useState(false);
+	const [selectedWorkspace, setSelectedWorkspace] = useState<Workspace | null>(
+		null,
+	);
+
+	const handleOpen = async () => {
+		setOpen(true);
+		setWorkspacesLoading(true);
+		try {
+			const data = await listAllWorkspaces();
+			setWorkspaces(data);
+		} catch {
+			// ignore
+		} finally {
+			setWorkspacesLoading(false);
+		}
+	};
+
+	const handleClose = () => {
+		setOpen(false);
+		setSelectedWorkspace(null);
+	};
+
+	return (
+		<>
+			<button
+				className="start-tool-fab"
+				onClick={handleOpen}
+				title="Start a new tool"
+				type="button"
+				aria-label="Start a new tool"
+			>
+				<Icon name="play" size="md" />
+			</button>
+
+			{open && (
+				<div className="modal-overlay" onClick={handleClose}>
+					<div
+						className="modal-content start-tool-modal"
+						onClick={(e) => e.stopPropagation()}
+					>
+						<div className="modal-header">
+							<h3>Start Tool</h3>
+							<button
+								className="ghost-button small"
+								onClick={handleClose}
+								type="button"
+								aria-label="Close"
+							>
+								<Icon name="close" size="sm" />
+							</button>
+						</div>
+
+						{workspacesLoading ? (
+							<p className="muted">Loading workspaces...</p>
+						) : workspaces.length === 0 ? (
+							<p className="muted">
+								No workspaces yet.{" "}
+								<a href="/workspaces">Create a workspace first</a>.
+							</p>
+						) : !selectedWorkspace ? (
+							<div className="form-group">
+								<label htmlFor="fab-workspace-select">
+									Select a workspace
+								</label>
+								<select
+									id="fab-workspace-select"
+									value=""
+									onChange={(e) => {
+										const ws = workspaces.find(
+											(w) => w.id === e.target.value,
+										);
+										if (ws) setSelectedWorkspace(ws);
+									}}
+								>
+									<option value="">Choose a workspace...</option>
+									{workspaces.map((ws) => (
+										<option key={ws.id} value={ws.id}>
+											{ws.project_name} / {ws.repo_name} / {ws.name}
+										</option>
+									))}
+								</select>
+							</div>
+						) : (
+							<>
+								<div className="tool-starter-header">
+									<h4>
+										{selectedWorkspace.project_name} /{" "}
+										{selectedWorkspace.repo_name} /{" "}
+										{selectedWorkspace.name}
+									</h4>
+									<button
+										className="ghost-button small"
+										onClick={() => setSelectedWorkspace(null)}
+										type="button"
+									>
+										Change
+									</button>
+								</div>
+								<ToolStarter
+									workspace={selectedWorkspace}
+									onStarted={handleClose}
+									onCancel={() => setSelectedWorkspace(null)}
+								/>
+							</>
+						)}
+					</div>
+				</div>
+			)}
+		</>
+	);
+}
diff --git a/apps/web/src/pages/dashboard.tsx b/apps/web/src/pages/dashboard.tsx
index b511002..aafee58 100644
--- a/apps/web/src/pages/dashboard.tsx
+++ b/apps/web/src/pages/dashboard.tsx
@@ -8,17 +8,10 @@ import {
 	type Session as SessionApi,
 	type InstanceHealth,
 } from "../api/sessions";
-import { listProjects } from "../api/projects";
-import { listRepositories, type GitRepository } from "../api/git_repositories";
-import { listToolTypes, type ToolType } from "../api/tool_types";
-import { updateUserConfig } from "../api/settings";
-import type { ProjectWithRepos } from "../types";
 import {
-	EmptyState,
 	ErrorState,
 	LoadingState,
 } from "../components/data-states";
-import { CreateSessionForm } from "../components/create-session-form";
 import { SessionList } from "../components/session-list";
 import { useInstanceActions } from "../hooks/use-instance-actions";
 
@@ -37,10 +30,6 @@ export const HomePage = () => {
 	const [status, setStatus] = useState<HomeStatus>("loading");
 	const [summary, setSummary] = useState<DashboardSummary | null>(null);
 	const [sessions, setSessions] = useState<SessionView[]>([]);
-	const [projects, setProjects] = useState<ProjectWithRepos[]>([]);
-	const [repositories, setRepositories] = useState<GitRepository[]>([]);
-	const [toolTypes, setToolTypes] = useState<ToolType[]>([]);
-	const [selectedProject, setSelectedProject] = useState("");
 	const [tunnelHealth, setTunnelHealth] = useState<
 		Record<string, InstanceHealth>
 	>({});
@@ -49,17 +38,12 @@ export const HomePage = () => {
 	const loadHome = useCallback(async () => {
 		setStatus("loading");
 		try {
-			const [dashboard, sessionData, projectData, toolTypeData] =
-				await Promise.all([
-					getDashboardSummary(),
-					getUserSessions(),
-					listProjects(),
-					listToolTypes(),
-				]);
+			const [dashboard, sessionData] = await Promise.all([
+				getDashboardSummary(),
+				getUserSessions(),
+			]);
 			setSummary(dashboard);
 			setSessions(sessionData as SessionView[]);
-			setProjects(projectData);
-			setToolTypes(toolTypeData);
 			setStatus("ready");
 		} catch {
 			setStatus("error");
@@ -122,24 +106,6 @@ export const HomePage = () => {
 		return () => clearInterval(interval);
 	}, [safeSessions]);
 
-	useEffect(() => {
-		if (!selectedProject) {
-			setRepositories([]);
-			return;
-		}
-
-		const loadRepos = async () => {
-			try {
-				const data = await listRepositories(selectedProject);
-				setRepositories(data);
-			} catch {
-				setRepositories([]);
-			}
-		};
-
-		void loadRepos();
-	}, [selectedProject]);
-
 	const activeSessions = useMemo(
 		() =>
 			safeSessions.filter((session) =>
@@ -148,12 +114,6 @@ export const HomePage = () => {
 		[safeSessions],
 	);
 
-	const handleCreateSuccess = async (instance: { id: string }) => {
-		await updateUserConfig({ last_session_id: instance.id });
-		setSelectedProject("");
-		await loadHome();
-	};
-
 	return (
 		<section className="stack home-page">
 			<header className="home-hero card">
@@ -245,59 +205,20 @@ export const HomePage = () => {
 					<section className="card stack home-section">
 						<div className="page-header">
 							<div>
-								<p className="eyebrow">Available projects</p>
-								<h2>{projects.length}</h2>
+								<p className="eyebrow">Workspaces</p>
+								<h2>Quick access</h2>
 							</div>
 							<button
 								className="secondary-button"
 								type="button"
-								onClick={() => navigate("/projects")}
+								onClick={() => navigate("/workspaces")}
 							>
 								View all
 							</button>
 						</div>
-						{projects.length === 0 ? (
-							<EmptyState message="No projects yet." />
-						) : (
-							<div className="home-project-grid">
-								{projects.map((project) => (
-									<article
-										className="card project-card home-project-card"
-										key={project.id}
-									>
-										<div className="stack-sm">
-											<h3>{project.name}</h3>
-											{project.description && (
-												<p className="muted">{project.description}</p>
-											)}
-										</div>
-										<button
-											className="ghost-button small"
-											type="button"
-											onClick={() => navigate(`/projects/${project.id}`)}
-										>
-											Open Workspace
-										</button>
-									</article>
-								))}
-							</div>
-						)}
-					</section>
-
-					<section className="card stack home-section">
-						<div className="page-header">
-							<div>
-								<p className="eyebrow">Quick create</p>
-								<h2>Start a session</h2>
-							</div>
-						</div>
-						<CreateSessionForm
-							projects={projects}
-							repositories={repositories}
-							toolTypes={toolTypes}
-							onProjectChange={(projectId) => setSelectedProject(projectId)}
-							onSuccess={handleCreateSuccess}
-						/>
+						<p className="muted">
+							Use the floating button to start a tool in any workspace.
+						</p>
 					</section>
 
 					{safeSessions.filter((s) => ["stopped", "error"].includes(s.status))
diff --git a/apps/web/src/pages/sessions.tsx b/apps/web/src/pages/sessions.tsx
index ed50ef2..2442249 100644
--- a/apps/web/src/pages/sessions.tsx
+++ b/apps/web/src/pages/sessions.tsx
@@ -6,14 +6,11 @@ import {
 	checkInstanceHealth,
 } from "../api/sessions";
 import { getUserConfig } from "../api/settings";
-import { listAllWorkspaces } from "../api/workspaces";
 import { ErrorState, LoadingState } from "../components/data-states";
 import { SessionList } from "../components/session-list";
 import { SessionCard } from "../components/session-card";
-import { ToolStarter } from "../components/tool-starter";
 import { useInstanceActions } from "../hooks/use-instance-actions";
 import type { InstanceHealth } from "../api/sessions";
-import type { Workspace } from "../types/workspace";
 
 type SessionsStatus = "loading" | "ready" | "error";
 
@@ -22,12 +19,6 @@ export const SessionsPage = () => {
 	const [sessions, setSessions] = useState<Session[]>([]);
 	const [lastSessionId, setLastSessionId] = useState<string | null>(null);
 
-	const [workspaces, setWorkspaces] = useState<Workspace[]>([]);
-	const [workspacesLoading, setWorkspacesLoading] = useState(true);
-	const [selectedWorkspace, setSelectedWorkspace] = useState<Workspace | null>(
-		null,
-	);
-
 	const [tunnelHealth, setTunnelHealth] = useState<
 		Record<string, InstanceHealth>
 	>({});
@@ -51,21 +42,6 @@ export const SessionsPage = () => {
 		void loadSessions();
 	}, [loadSessions]);
 
-	// Load workspaces for the tool-starter flow
-	useEffect(() => {
-		const load = async () => {
-			try {
-				const data = await listAllWorkspaces();
-				setWorkspaces(data);
-			} catch {
-				// ignore
-			} finally {
-				setWorkspacesLoading(false);
-			}
-		};
-		void load();
-	}, []);
-
 	const {
 		loadingSessionId,
 		dirtyDeleteSession,
@@ -123,11 +99,6 @@ export const SessionsPage = () => {
 
 	const lastSession = sessions.find((s) => s.id === lastSessionId) ?? null;
 
-	const handleToolStarted = async () => {
-		setSelectedWorkspace(null);
-		await loadSessions();
-	};
-
 	return (
 		<section className="stack sessions-page">
 			<div className="page-header">
@@ -173,71 +144,13 @@ export const SessionsPage = () => {
 						/>
 					</div>
 
-					{/* Create Session — workspace-first */}
+					{/* Create Session — use floating button */}
 					<div className="create-session-section">
 						<h2>Start New Tool</h2>
-						{workspacesLoading ? (
-							<p className="muted">Loading workspaces...</p>
-						) : workspaces.length === 0 ? (
-							<p className="muted">
-								No workspaces yet.{" "}
-								<a href="/workspaces">Create a workspace first</a>.
-							</p>
-						) : (
-							<div className="stack">
-								{!selectedWorkspace ? (
-									<div className="form-group">
-										<label htmlFor="workspace-select">
-											Select a workspace to start a tool in
-										</label>
-										<select
-											id="workspace-select"
-											value=""
-											onChange={(e) => {
-												const ws = workspaces.find(
-													(w) => w.id === e.target.value,
-												);
-												if (ws) setSelectedWorkspace(ws);
-											}}
-										>
-											<option value="">
-												Choose a workspace...
-											</option>
-											{workspaces.map((ws) => (
-												<option key={ws.id} value={ws.id}>
-													{ws.project_name} / {ws.repo_name} /{" "}
-													{ws.name}
-												</option>
-											))}
-										</select>
-									</div>
-								) : (
-									<div className="card">
-										<div className="tool-starter-header">
-											<h4>
-												{selectedWorkspace.project_name} /{" "}
-												{selectedWorkspace.repo_name} /{" "}
-												{selectedWorkspace.name}
-											</h4>
-											<button
-												className="ghost-button small"
-												onClick={() =>
-													setSelectedWorkspace(null)
-												}
-												type="button"
-											>
-												Change
-											</button>
-										</div>
-										<ToolStarter
-											workspace={selectedWorkspace}
-											onStarted={handleToolStarted}
-											onCancel={() => setSelectedWorkspace(null)}
-										/>
-									</div>
-								)}
-							</div>
-						)}
+						<p className="muted">
+							Use the floating button (bottom-right) to start a tool in any
+							workspace.
+						</p>
 					</div>
 
 					{/* Dirty Delete Confirmation Modal */}
diff --git a/apps/web/src/styles.css b/apps/web/src/styles.css
index 8428344..1f9171f 100644
--- a/apps/web/src/styles.css
+++ b/apps/web/src/styles.css
@@ -5615,3 +5615,57 @@ a:active,
 .tool-starter-header h4 {
 	margin: 0;
 }
+
+/* ─── Floating Action Button ─── */
+.start-tool-fab {
+	position: fixed;
+	bottom: 2rem;
+	right: 2rem;
+	z-index: 100;
+	width: 3.5rem;
+	height: 3.5rem;
+	border-radius: 50%;
+	background: var(--primary);
+	color: var(--primary-fg);
+	border: none;
+	box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
+	cursor: pointer;
+	display: flex;
+	align-items: center;
+	justify-content: center;
+	transition: transform 0.15s ease, box-shadow 0.15s ease;
+}
+
+.start-tool-fab:hover {
+	transform: scale(1.08);
+	box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
+}
+
+.start-tool-fab:active {
+	transform: scale(0.95);
+}
+
+.start-tool-modal {
+	max-width: 480px;
+	width: 90vw;
+}
+
+.modal-header {
+	display: flex;
+	justify-content: space-between;
+	align-items: center;
+	margin-bottom: var(--space-3);
+}
+
+.modal-header h3 {
+	margin: 0;
+}
+
+@media (max-width: 640px) {
+	.start-tool-fab {
+		bottom: 5rem; /* above mobile tab bar */
+		right: 1rem;
+		width: 3rem;
+		height: 3rem;
+	}
+}