Add the window identification overlay

Every profile launches the same Claude Desktop binary with the same icon
and title, so with two or more open there was no way to tell which window
belonged to which profile at a glance. WindowOverlay pins a small tag —
profile name, in that profile's own dot colour — to each running managed
profile's window, tracked live via AXObserver notifications rather than
polling. Only a persistent process can hold a watcher like that, which is
exactly the gap the old one-shot CLI could never close.

Shown for every running managed profile, not just when two or more are
up: the tag is an identity marker, not merely a disambiguator. Never
shown on "default", which isn't a shannoncoat profile at all.

Positioned top-right, since top-left is where a window's close/minimize/
zoom controls live. Draggable in case that still obstructs something in a
particular layout, on a .nonactivatingPanel so dragging it doesn't steal
focus from the window underneath, with the offset persisted.

Attachment retries for ~3s rather than requiring the target's first
window to already exist: a cold Electron launch can take a second or more
between the process starting — which is what triggers the update, via
NSWorkspace's launch notification — and its first window existing. Losing
that race previously meant the tag silently never appeared at all.

Also ignores CHECKPOINT.md, a local session-handoff note.

.github/workflows/release.yml

@@ -0,0 +1,47 @@
+name: Release
+
+# Two ways in: a manually pushed version tag, or a direct call from
+# tag-on-version-bump.yml (which fires on VERSION changes on main). The
+# workflow_call path exists because pushes made with the default
+# GITHUB_TOKEN don't trigger other workflows' `on.push` — a tag pushed by
+# that workflow wouldn't reach this one's `tags:` trigger on its own.
+on:
+  push:
+    tags:
+      - "*"
+  workflow_call:
+    inputs:
+      tag:
+        required: true
+        type: string
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.tag || github.ref }}
+
+      - name: Build shannoncoat.app
+        run: ./build.sh
+        env:
+          # This workflow only ever runs against a tag (see the trigger
+          # comment above) — told to build.sh directly rather than having
+          # it re-derive that via `git describe`, which needs full tag
+          # refs a CI runner's checkout isn't guaranteed to have fetched.
+          SHANNONCOAT_RELEASE_BUILD: "1"
+
+      - name: Zip app bundle
+        run: ditto -c -k --sequesterRsrc --keepParent ".build/shannoncoat.app" "shannoncoat.app.zip"
+
+      - name: Publish release
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ inputs.tag || github.ref_name }}
+          files: |
+            shannoncoat.app.zip
+          generate_release_notes: true

.github/workflows/tag-on-version-bump.yml

@@ -0,0 +1,49 @@
+name: Tag on version bump
+
+on:
+  push:
+    branches: [main]
+    paths: ["VERSION"]
+
+permissions:
+  contents: write
+
+jobs:
+  tag:
+    runs-on: ubuntu-latest
+    outputs:
+      tag: ${{ steps.tag.outputs.tag }}
+      created: ${{ steps.tag.outputs.created }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      # Guards against re-tagging on a no-op push (e.g. VERSION edited then
+      # reverted to the same value in a later commit) — only pushes a tag
+      # that doesn't exist yet.
+      - name: Create tag if new
+        id: tag
+        run: |
+          VERSION="$(tr -d '[:space:]' < VERSION)"
+          TAG="$VERSION"
+          echo "tag=$TAG" >> "$GITHUB_OUTPUT"
+          if git rev-parse "$TAG" >/dev/null 2>&1; then
+            echo "Tag $TAG already exists, skipping."
+            echo "created=false" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git tag -a "$TAG" -m "Release $TAG"
+          git push origin "$TAG"
+          echo "created=true" >> "$GITHUB_OUTPUT"
+
+  release:
+    needs: tag
+    if: needs.tag.outputs.created == 'true'
+    uses: ./.github/workflows/release.yml
+    with:
+      tag: ${{ needs.tag.outputs.tag }}
+    permissions:
+      contents: write

.gitignore

@@ -0,0 +1,144 @@
+# Icon generation: raw Claude.app icon assets extracted as source material
+# for icon/generate-icon.swift — the derived composite (icon/AppIcon.icns)
+# is committed, but Anthropic's own unmodified icon files aren't.
+icon/claude-src/
+icon/AppIcon.iconset/
+
+# Session handoff notes — local only, never committed
+CHECKPOINT.md
+
+# Local reference material (e.g. nested checkouts of other projects) — not
+# part of this project, never meant to be committed.
+.scratch/
+
+# Xcode
+#
+# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
+
+## User settings
+xcuserdata/
+
+## Obj-C/Swift specific
+*.hmap
+
+## App packaging
+*.ipa
+*.dSYM.zip
+*.dSYM
+
+## Playgrounds
+timeline.xctimeline
+playground.xcworkspace
+
+# Swift Package Manager
+#
+# Add this line if you want to avoid checking in source code from Swift Package Manager dependencies.
+# Packages/
+# Package.pins
+# Package.resolved
+# *.xcodeproj
+#
+# Xcode automatically generates this directory with a .xcworkspacedata file and xcuserdata
+# hence it is not needed unless you have added a package configuration file to your project
+# .swiftpm
+
+.build/
+
+# CocoaPods
+#
+# We recommend against adding the Pods directory to your .gitignore. However
+# you should judge for yourself, the pros and cons are mentioned at:
+# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
+#
+# Pods/
+#
+# Add this line if you want to avoid checking in source code from the Xcode workspace
+# *.xcworkspace
+
+# Carthage
+#
+# Add this line if you want to avoid checking in source code from Carthage dependencies.
+# Carthage/Checkouts
+
+Carthage/Build/
+
+# fastlane
+#
+# It is recommended to not store the screenshots in the git repo.
+# Instead, use fastlane to re-generate the screenshots whenever they are needed.
+# For more information about the recommended setup visit:
+# https://docs.fastlane.tools/best-practices/source-control/#source-control
+
+fastlane/report.xml
+fastlane/Preview.html
+fastlane/screenshots/**/*.png
+fastlane/test_output
+
+# AI agents and assistants
+#
+# Some common agent instruction and project configuration files are listed
+# below as commented-out examples. They are often intentionally committed and
+# shared with a team, so only uncomment them if they are local-only in your
+# project.
+
+# GEMINI.md
+# WARP.md
+# CRUSH.md
+# QWEN.md
+
+# OpenAI Codex
+# AGENTS.md
+# .codex/
+
+# Aider
+# .aider.input.history
+# .aider.chat.history.md
+# .aider.llm.history
+# .aider.tags.cache.v*
+# .aiderignore
+
+# Claude Code
+.claude/*.local.json
+.claude/**/*.log
+CLAUDE.local.md
+# .claude/
+
+# Gemini CLI
+# gemini-debug.log
+# .gemini-clipboard/
+# .gemini/
+
+# Cursor AI
+# .cursorrules
+# .cursor/
+# .cursor.json
+# .cursor-settings.yaml
+
+# Continue
+# .continue/
+# .continuerc.json
+
+# Cline
+# .cline/
+# .clinerules
+# cline.json
+
+# Other agent/editor project config
+# .warp/
+# .crush/
+# .codeium/
+# .deepseek/
+# .amazon-codewhisperer/
+# .tabnineignore
+# .tabnine/
+
+# GitHub Copilot
+# .github/copilot-instructions.md
+
+# Windsurf Editor
+# .windsurfrules
+# .windsurf/
+
+# Replit AI Development
+# .replit
+# replit.nix

Sources/AppDelegate.swift

@@ -0,0 +1,310 @@
+// Menu bar behavior: title dots, per-profile menu, Manage Profiles window.
+// Reads live state from LiveState (push-based, no polling) and calls
+// ProfileStore/ClaudeControl in-process — no subprocess, no text parsing.
+import AppKit
+
+final class AppDelegate: NSObject, NSApplicationDelegate, NSMenuDelegate, LiveStateDelegate {
+    let statusItem = NSStatusBar.system.statusItem(withLength: NSStatusItem.variableLength)
+    let menu = NSMenu()
+    let liveState = LiveState()
+    private var currentInfos: [ProfileInfo] = []
+    private var collisionAlertShown = false
+    private var windowOverlays: [String: WindowOverlay] = [:]
+    private var pendingWindowOverlays: Set<String> = []
+
+    func applicationDidFinishLaunching(_ notification: Notification) {
+        menu.delegate = self
+        menu.autoenablesItems = false
+        statusItem.menu = menu
+        statusItem.button?.image = menuBarIcon()
+        statusItem.button?.imagePosition = .imageLeft
+
+        liveState.delegate = self
+        ManageWindowController.shared.onProfilesChanged = { [weak self] in self?.liveState.reconcile() }
+        liveState.reconcile()
+
+        // Launching this app fresh with nothing running means there's no
+        // menu-bar title/dots to click yet — offer a picker up front
+        // instead of leaving the user to discover the dropdown.
+        if currentInfos.filter(\.running).isEmpty {
+            showStartupPicker(currentInfos)
+        }
+
+        UpdateChecker.checkAutomaticallyIfDue()
+    }
+
+    // Claude's own app icon (bundled as Contents/Resources/AppIcon.icns —
+    // currently a placeholder, see icon/generate-icon.swift), scaled down
+    // for the menu bar.
+    private func menuBarIcon() -> NSImage {
+        let source = NSApp.applicationIconImage ?? NSImage(named: NSImage.applicationIconName) ?? NSImage()
+        let resized = NSImage(size: NSSize(width: 18, height: 18))
+        resized.lockFocus()
+        source.draw(in: NSRect(x: 0, y: 0, width: 18, height: 18), from: .zero, operation: .sourceOver, fraction: 1.0)
+        resized.unlockFocus()
+        return resized
+    }
+
+    // MARK: - LiveStateDelegate
+
+    func liveStateDidChange(_ infos: [ProfileInfo]) {
+        collisionAlertShown = false
+        currentInfos = infos
+        applyTitle(infos)
+        ManageWindowController.shared.update(infos)
+        updateWindowOverlays(infos)
+    }
+
+    // Shown on every running *managed* profile — never on "default",
+    // which isn't a shannoncoat profile at all, just the real underlying
+    // Claude install. Removing an entry here deinits its WindowOverlay,
+    // which tears down its AXObserver and hides the tag panel.
+    private func updateWindowOverlays(_ infos: [ProfileInfo]) {
+        let managed = infos.filter { $0.running && $0.profile.name != "default" }
+        let managedNames = Set(managed.map(\.profile.name))
+        windowOverlays = windowOverlays.filter { managedNames.contains($0.key) }
+        pendingWindowOverlays.formIntersection(managedNames)
+
+        for info in managed
+        where windowOverlays[info.profile.name] == nil && !pendingWindowOverlays.contains(info.profile.name) {
+            guard let pid = info.pid else { continue }
+            let name = info.profile.name
+            pendingWindowOverlays.insert(name)
+            WindowOverlay.attach(profileName: name, color: ProfileColor.dotColor(for: name), pid: pid) { [weak self] overlay in
+                guard let self else { return }
+                pendingWindowOverlays.remove(name)
+                // The profile may have quit again while this was retrying
+                // for its window — don't attach a stale overlay if so.
+                guard currentInfos.contains(where: { $0.profile.name == name && $0.running }) else { return }
+                windowOverlays[name] = overlay
+            }
+        }
+    }
+
+    // Two profiles sharing a dir is a fatal misconfiguration (would
+    // silently merge their Claude sessions) — surfaced with an alert
+    // rather than crashing the app outright, since that would leave the
+    // user with no way to fix it short of hand-editing files blind.
+    func liveStateFoundCollisions(_ collisions: [ProfileStore.DirCollision]) {
+        guard !collisionAlertShown else { return }
+        collisionAlertShown = true
+        let lines = collisions.map { "\u{2022} \($0.kind): \"\($0.profileA)\" and \"\($0.profileB)\" both use \($0.dir)" }
+        let alert = NSAlert()
+        alert.alertStyle = .critical
+        alert.messageText = "shannoncoat: configuration error"
+        alert.informativeText = "Two profiles can't share a directory:\n\n" + lines.joined(separator: "\n")
+        alert.addButton(withTitle: "OK")
+        alert.runModal()
+    }
+
+    // Title reflects what's ACTUALLY running — one profile shows as a dot
+    // + name; several show as dots only, to keep the menu bar from growing
+    // unbounded, with the full list available via tooltip and the dropdown.
+    private func applyTitle(_ profiles: [ProfileInfo]) {
+        guard let button = statusItem.button else { return }
+        let running = profiles.filter(\.running)
+        switch running.count {
+        case 0:
+            button.attributedTitle = NSAttributedString(string: "")
+            button.toolTip = "Claude not running"
+        case 1:
+            let name = running[0].profile.name
+            let title = NSMutableAttributedString(
+                string: "\u{25cf} ", attributes: [.foregroundColor: ProfileColor.dotColor(for: name)])
+            title.append(NSAttributedString(string: name, attributes: [.foregroundColor: NSColor.labelColor]))
+            button.attributedTitle = title
+            button.toolTip = nil
+        default:
+            let title = NSMutableAttributedString()
+            for info in running {
+                title.append(NSAttributedString(
+                    string: "\u{25cf}", attributes: [.foregroundColor: ProfileColor.dotColor(for: info.profile.name)]))
+            }
+            button.attributedTitle = title
+            button.toolTip = running.map(\.profile.name).joined(separator: ", ")
+        }
+    }
+
+    // MARK: - Menu
+
+    func menuNeedsUpdate(_ menu: NSMenu) {
+        menu.removeAllItems()
+        liveState.reconcile() // correctness backstop; live updates are the primary mechanism
+        let profiles = currentInfos
+        let runningCount = profiles.filter(\.running).count
+
+        let header = NSMenuItem(
+            title: runningCount == 0 ? "Claude not running"
+                : runningCount == 1 ? "1 profile running" : "\(runningCount) profiles running",
+            action: nil, keyEquivalent: "")
+        header.isEnabled = false
+        menu.addItem(header)
+        menu.addItem(.separator())
+
+        let hint = NSMenuItem(title: "\u{21e7}-click to open alongside", action: nil, keyEquivalent: "")
+        hint.isEnabled = false
+        menu.addItem(hint)
+        menu.addItem(.separator())
+
+        for info in profiles {
+            // Click = exclusive switch (quits every other running profile).
+            // Shift-click = open alongside instead, without disturbing
+            // anything else that's running.
+            let title = info.profile.name == liveState.lastActiveName
+                ? "\(info.profile.name)  \u{21c6}" : info.profile.name
+            let item = NSMenuItem(title: title, action: #selector(pick(_:)), keyEquivalent: "")
+            item.target = self
+            item.representedObject = info.profile.name
+            item.image = ProfileColor.dotImage(for: info.profile.name, dimmed: !info.running)
+            item.state = info.running ? .on : .off
+            item.toolTip = info.running ? "Running — click to focus" : "Click to switch • Shift-click to open alongside"
+            menu.addItem(item)
+        }
+
+        menu.addItem(.separator())
+        let manageItem = NSMenuItem(
+            title: "Manage Profiles\u{2026}", action: #selector(openManageWindow), keyEquivalent: ",")
+        manageItem.keyEquivalentModifierMask = [.command]
+        manageItem.target = self
+        menu.addItem(manageItem)
+
+        let closeItem = NSMenuItem(title: "Close Profile", action: nil, keyEquivalent: "")
+        let closeMenu = NSMenu()
+        let closeable = profiles.filter(\.running)
+        if closeable.isEmpty {
+            let none = NSMenuItem(title: "(none running)", action: nil, keyEquivalent: "")
+            none.isEnabled = false
+            closeMenu.addItem(none)
+        } else {
+            for info in closeable {
+                let mi = NSMenuItem(title: info.profile.name, action: #selector(closeProfile(_:)), keyEquivalent: "")
+                mi.target = self
+                mi.representedObject = info.profile.name
+                closeMenu.addItem(mi)
+            }
+        }
+        closeItem.submenu = closeMenu
+        menu.addItem(closeItem)
+
+        menu.addItem(.separator())
+        let aboutItem = NSMenuItem(title: "About shannoncoat", action: #selector(showAbout), keyEquivalent: "")
+        aboutItem.target = self
+        menu.addItem(aboutItem)
+
+        menu.addItem(.separator())
+        let quitClaudeItem = NSMenuItem(title: "Quit Claude", action: #selector(quitClaude), keyEquivalent: "")
+        quitClaudeItem.target = self
+        menu.addItem(quitClaudeItem)
+
+        let quitSelfItem = NSMenuItem(title: "Quit shannoncoat", action: #selector(quitSelf), keyEquivalent: "q")
+        quitSelfItem.target = self
+        menu.addItem(quitSelfItem)
+    }
+
+    // Shown once at launch when nothing is running. A checklist rather
+    // than a single pick: unlike the menu's click/Shift-click (one
+    // profile, exclusive vs. alongside), there's nothing running yet to be
+    // "alongside" of, so this lets several profiles be selected to start
+    // together in one go.
+    private func showStartupPicker(_ profiles: [ProfileInfo]) {
+        guard !profiles.isEmpty else { return }
+        let alert = NSAlert()
+        alert.messageText = "Start Claude"
+        alert.informativeText = "Nothing is running. Choose which profiles to start:"
+        alert.addButton(withTitle: "Start")
+        alert.addButton(withTitle: "Cancel")
+
+        let rowHeight: CGFloat = 22
+        let container = NSView(frame: NSRect(x: 0, y: 0, width: 240, height: rowHeight * CGFloat(profiles.count)))
+        var checkboxes: [(box: NSButton, name: String)] = []
+        for (i, info) in profiles.enumerated() {
+            let y = rowHeight * CGFloat(profiles.count - 1 - i)
+            let box = NSButton(checkboxWithTitle: info.profile.name, target: nil, action: nil)
+            box.frame = NSRect(x: 0, y: y, width: 240, height: rowHeight)
+            box.state = info.profile.name == liveState.lastActiveName ? .on : .off
+            container.addSubview(box)
+            checkboxes.append((box, info.profile.name))
+        }
+        alert.accessoryView = container
+
+        guard alert.runModal() == .alertFirstButtonReturn else { return }
+
+        for (box, name) in checkboxes where box.state == .on {
+            guard let profile = profiles.first(where: { $0.profile.name == name })?.profile else { continue }
+            liveState.markActive(name)
+            ClaudeControl.launch(profile)
+        }
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) { [weak self] in self?.liveState.reconcile() }
+    }
+
+    // MARK: - Actions
+
+    @objc func pick(_ sender: NSMenuItem) {
+        guard let name = sender.representedObject as? String,
+              let profile = currentInfos.first(where: { $0.profile.name == name })?.profile
+        else { return }
+        liveState.markActive(name)
+        if NSApp.currentEvent?.modifierFlags.contains(.shift) == true {
+            openProfile(profile)
+        } else {
+            switchTo(profile)
+        }
+    }
+
+    private func openProfile(_ profile: ResolvedProfile) {
+        if let pid = ClaudeControl.pid(for: profile) {
+            ClaudeControl.focus(pid: pid) { _ in DispatchQueue.main.async { [weak self] in self?.liveState.reconcile() } }
+        } else {
+            ClaudeControl.launch(profile)
+            // The launch notification usually beats this, but a short
+            // explicit poke keeps the UI snappy even if it doesn't.
+            DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) { [weak self] in self?.liveState.reconcile() }
+        }
+    }
+
+    private func switchTo(_ profile: ResolvedProfile) {
+        let others = currentInfos.filter { $0.running && $0.profile.name != profile.name }
+        guard !others.isEmpty else { openProfile(profile); return }
+        var remaining = others.count
+        for info in others {
+            guard let pid = info.pid else { remaining -= 1; continue }
+            ClaudeControl.quit(pid: pid) { [weak self] _ in
+                remaining -= 1
+                if remaining == 0 {
+                    DispatchQueue.main.async { self?.openProfile(profile) }
+                }
+            }
+        }
+    }
+
+    @objc func closeProfile(_ sender: NSMenuItem) {
+        guard let name = sender.representedObject as? String,
+              let info = currentInfos.first(where: { $0.profile.name == name }), let pid = info.pid
+        else { return }
+        ClaudeControl.quit(pid: pid) { _ in DispatchQueue.main.async { [weak self] in self?.liveState.reconcile() } }
+    }
+
+    @objc func openManageWindow() {
+        ManageWindowController.shared.update(currentInfos)
+        ManageWindowController.shared.show()
+    }
+
+    // About lives as a tab in the same window (see ManageWindow.swift)
+    // rather than the standard NSApp About panel — the standard panel
+    // auto-appends its own "Version X (Y)" line from Info.plist's
+    // CFBundleVersion/CFBundleShortVersionString, which are identical in
+    // this build, so it was showing that duplicated alongside our own
+    // version line.
+    @objc func showAbout() {
+        ManageWindowController.shared.update(currentInfos)
+        ManageWindowController.shared.show(tab: .about)
+    }
+
+    @objc func quitClaude() {
+        ClaudeControl.quitAll { DispatchQueue.main.async { [weak self] in self?.liveState.reconcile() } }
+    }
+
+    @objc func quitSelf() {
+        NSApp.terminate(nil)
+    }
+}

Sources/ClaudeControl.swift

@@ -0,0 +1,240 @@
+// Everything about controlling the Claude process itself: launch, focus,
+// quit. Only two real primitives — launch/focus one profile ("open"), and
+// quit one profile ("close"); "switch" (exclusive) is composed from these
+// two in AppDelegate rather than being a third code path here.
+import AppKit
+import ApplicationServices
+import Foundation
+import UniformTypeIdentifiers
+
+enum ClaudeControl {
+    private static let appPathKey = "ClaudeAppPath"
+
+    // Both places an app legitimately lives on macOS: the machine-wide
+    // /Applications and a per-user ~/Applications. Checked in that order,
+    // after any location the user has pointed us at themselves.
+    private static var candidatePaths: [String] {
+        [
+            "/Applications/Claude.app",
+            FileManager.default.homeDirectoryForCurrentUser
+                .appendingPathComponent("Applications/Claude.app").path,
+        ]
+    }
+
+    private static var cachedAppPath: String?
+
+    // Resolved once per launch, because this is consulted on every process
+    // enumeration — which happens on every workspace notification.
+    static var appPath: String {
+        if let cachedAppPath { return cachedAppPath }
+        let resolved = resolveAppPath()
+        cachedAppPath = resolved
+        return resolved
+    }
+
+    static var binaryPath: String { "\(appPath)/Contents/MacOS/Claude" }
+
+    static var isInstalled: Bool { FileManager.default.fileExists(atPath: binaryPath) }
+
+    private static func holdsClaude(_ path: String) -> Bool {
+        FileManager.default.fileExists(atPath: "\(path)/Contents/MacOS/Claude")
+    }
+
+    private static func resolveAppPath() -> String {
+        if let saved = UserDefaults.standard.string(forKey: appPathKey), holdsClaude(saved) {
+            return saved
+        }
+        if let found = candidatePaths.first(where: holdsClaude) {
+            return found
+        }
+        // Found nothing. Report against the standard location anyway, so
+        // anything that surfaces this path names somewhere meaningful
+        // rather than an empty string.
+        return candidatePaths[0]
+    }
+
+    // For an install in neither standard location. Modal by nature, but only
+    // ever reached from an explicit user action that can't proceed without
+    // an answer — better than a menu click that silently does nothing.
+    @discardableResult
+    static func promptForAppLocation() -> Bool {
+        let panel = NSOpenPanel()
+        panel.message = "Couldn't find Claude in Applications. Choose Claude.app to continue."
+        panel.prompt = "Choose"
+        panel.canChooseFiles = true
+        panel.canChooseDirectories = false
+        panel.allowsMultipleSelection = false
+        panel.allowedContentTypes = [.application]
+        panel.directoryURL = URL(fileURLWithPath: "/Applications")
+        NSApp.activate(ignoringOtherApps: true)
+
+        guard panel.runModal() == .OK, let url = panel.url else { return false }
+        guard holdsClaude(url.path) else {
+            let alert = NSAlert()
+            alert.alertStyle = .warning
+            alert.messageText = "That doesn't look like Claude."
+            alert.informativeText = "\(url.lastPathComponent) doesn't contain a Claude executable."
+            alert.runModal()
+            return false
+        }
+
+        UserDefaults.standard.set(url.path, forKey: appPathKey)
+        cachedAppPath = url.path
+        return true
+    }
+
+    static func runningInstances() -> [RunningClaude] {
+        ProcessInspector.listRunningClaude(binaryPath: binaryPath)
+    }
+
+    static func pid(for profile: ResolvedProfile) -> pid_t? {
+        let dir = profile.name == "default" ? nil : profile.appDir
+        return ProcessInspector.pid(forUserDataDir: dir, binaryPath: binaryPath)
+    }
+
+    // MARK: - Launch
+
+    @discardableResult
+    static func launch(_ profile: ResolvedProfile) -> Bool {
+        // Ask once rather than fail silently: a launch that does nothing
+        // gives the user no way to work out that Claude simply isn't where
+        // this expected it to be.
+        if !isInstalled, !promptForAppLocation() { return false }
+
+        let process = Process()
+        process.executableURL = URL(fileURLWithPath: binaryPath)
+        process.standardOutput = FileHandle.nullDevice
+        process.standardError = FileHandle.nullDevice
+
+        if profile.name != "default" {
+            try? FileManager.default.createDirectory(atPath: profile.codeDir, withIntermediateDirectories: true)
+            try? FileManager.default.createDirectory(atPath: profile.appDir, withIntermediateDirectories: true)
+            var env = ProcessInfo.processInfo.environment
+            env["CLAUDE_CONFIG_DIR"] = profile.codeDir
+            process.environment = env
+            process.arguments = ["--user-data-dir=\(profile.appDir)"]
+        }
+
+        do {
+            try process.run()
+            return true
+        } catch {
+            return false
+        }
+    }
+
+    // MARK: - Focus
+
+    // Robust focus: unhide, un-minimize, raise across Spaces via the
+    // Accessibility API directly (replacing the old AppleScript/System
+    // Events call), then NSRunningApplication.activate() as a second push.
+    // Waits briefly for a window to exist if the process was just launched,
+    // rather than giving up immediately. Best-effort by design (a focus
+    // request shouldn't be able to crash or block the caller), but no
+    // longer silent about the one failure that's actually actionable:
+    // Accessibility not granted.
+    static func focus(_ profile: ResolvedProfile, completion: @escaping (Bool) -> Void) {
+        guard let pid = pid(for: profile) else { completion(false); return }
+        focus(pid: pid, completion: completion)
+    }
+
+    static func focus(pid: pid_t, completion: @escaping (Bool) -> Void) {
+        if !AXIsProcessTrusted() {
+            promptForAccessibility()
+        }
+        guard let app = NSRunningApplication(processIdentifier: pid) else { completion(false); return }
+        if app.isHidden { app.unhide() }
+
+        let axApp = AXUIElementCreateApplication(pid)
+        waitForWindow(axApp: axApp, attemptsRemaining: 12) { window in
+            if let window {
+                setMinimized(window, false)
+                AXUIElementPerformAction(window, kAXRaiseAction as CFString)
+            }
+            app.activate()
+            completion(window != nil)
+        }
+    }
+
+    private static func waitForWindow(
+        axApp: AXUIElement, attemptsRemaining: Int, completion: @escaping (AXUIElement?) -> Void
+    ) {
+        if let window = firstWindow(of: axApp) {
+            completion(window)
+        } else if attemptsRemaining <= 0 {
+            completion(nil)
+        } else {
+            DispatchQueue.main.asyncAfter(deadline: .now() + 0.25) {
+                waitForWindow(axApp: axApp, attemptsRemaining: attemptsRemaining - 1, completion: completion)
+            }
+        }
+    }
+
+    private static func firstWindow(of axApp: AXUIElement) -> AXUIElement? {
+        var value: CFTypeRef?
+        guard AXUIElementCopyAttributeValue(axApp, kAXWindowsAttribute as CFString, &value) == .success,
+              let windows = value as? [AXUIElement], let first = windows.first
+        else { return nil }
+        return first
+    }
+
+    private static func setMinimized(_ window: AXUIElement, _ minimized: Bool) {
+        AXUIElementSetAttributeValue(window, kAXMinimizedAttribute as CFString, minimized as CFTypeRef)
+    }
+
+    private static func promptForAccessibility() {
+        let options = [kAXTrustedCheckOptionPrompt.takeUnretainedValue(): true] as CFDictionary
+        _ = AXIsProcessTrustedWithOptions(options)
+    }
+
+    // MARK: - Quit
+
+    enum QuitResult { case exited, blockedByOwnDialog, forceKilled, alreadyGone }
+
+    // Fixes a real bug in the old shell version: it waited a flat 5s then
+    // unconditionally SIGKILLed, which would kill Claude out from under its
+    // own "unsaved work" / "generation in progress" confirmation if it
+    // showed one. `.terminate()` is a request the target can legitimately
+    // delay or decline (it can return `.terminateCancel` from its own
+    // applicationShouldTerminate:), not a command it's forced to obey — so
+    // this waits much longer, and if Claude still has a window up at the
+    // end of that window (a sign it's showing its own dialog, or otherwise
+    // isn't done with something) it stops short of forceTerminate and
+    // reports that back instead of killing underneath it.
+    static func quit(pid: pid_t, completion: @escaping (QuitResult) -> Void) {
+        guard let app = NSRunningApplication(processIdentifier: pid) else { completion(.alreadyGone); return }
+        app.terminate()
+        pollForExit(app: app, attemptsRemaining: 40, completion: completion) // 40 * 0.25s = 10s grace period
+    }
+
+    static func quitAll(completion: @escaping () -> Void) {
+        let pids = runningInstances().map(\.pid)
+        guard !pids.isEmpty else { completion(); return }
+        var remaining = pids.count
+        for pid in pids {
+            quit(pid: pid) { _ in
+                remaining -= 1
+                if remaining == 0 { completion() }
+            }
+        }
+    }
+
+    private static func pollForExit(
+        app: NSRunningApplication, attemptsRemaining: Int, completion: @escaping (QuitResult) -> Void
+    ) {
+        if app.isTerminated {
+            completion(.exited)
+        } else if attemptsRemaining <= 0 {
+            if firstWindow(of: AXUIElementCreateApplication(app.processIdentifier)) != nil {
+                completion(.blockedByOwnDialog)
+            } else {
+                app.forceTerminate()
+                completion(.forceKilled)
+            }
+        } else {
+            DispatchQueue.main.asyncAfter(deadline: .now() + 0.25) {
+                pollForExit(app: app, attemptsRemaining: attemptsRemaining - 1, completion: completion)
+            }
+        }
+    }
+}

Sources/LaunchAtLogin.swift

@@ -0,0 +1,21 @@
+// Thin wrapper around the modern login-item API, toggled from the Manage
+// window's Settings tab. Standard, expected baseline behavior for a
+// persistent menu-bar utility that's otherwise easy to forget to reopen
+// after a restart.
+import ServiceManagement
+
+enum LaunchAtLogin {
+    static var isEnabled: Bool {
+        SMAppService.mainApp.status == .enabled
+    }
+
+    static func enable() throws {
+        guard SMAppService.mainApp.status != .enabled else { return }
+        try SMAppService.mainApp.register()
+    }
+
+    static func disable() throws {
+        guard SMAppService.mainApp.status == .enabled else { return }
+        try SMAppService.mainApp.unregister()
+    }
+}

Sources/LiveState.swift

@@ -0,0 +1,87 @@
+// Keeps the menu bar in sync with reality without ever polling. Registers
+// NSWorkspace notifications for launch/terminate/activate/hide/unhide,
+// filtered to Claude's own binary, and reconciles an in-memory
+// [ProfileInfo] the instant one fires (sub-second, push-based) — this is
+// what makes external changes (Force Quit, Spotlight, Dock, a hand quit)
+// show up immediately instead of needing a menu click or an app restart.
+import AppKit
+import Foundation
+
+struct ProfileInfo {
+    let profile: ResolvedProfile
+    let running: Bool
+    let pid: pid_t?
+}
+
+protocol LiveStateDelegate: AnyObject {
+    func liveStateDidChange(_ infos: [ProfileInfo])
+    func liveStateFoundCollisions(_ collisions: [ProfileStore.DirCollision])
+}
+
+final class LiveState {
+    weak var delegate: LiveStateDelegate?
+
+    // Best-effort "last switched to" pointer for the ⇆ marker in the menu —
+    // reflects profiles opened/switched through this app; there's no
+    // ordered history to fall back through if that one gets hand-quit
+    // (matches the "don't overdo it" brief — reality-vs-stopped state is
+    // still always ground-truth, this only affects the ⇆ hint).
+    private(set) var lastActiveName = "default"
+
+    private var observers: [NSObjectProtocol] = []
+
+    init() {
+        let center = NSWorkspace.shared.notificationCenter
+        let names: [Notification.Name] = [
+            NSWorkspace.didLaunchApplicationNotification,
+            NSWorkspace.didTerminateApplicationNotification,
+            NSWorkspace.didActivateApplicationNotification,
+            NSWorkspace.didHideApplicationNotification,
+            NSWorkspace.didUnhideApplicationNotification,
+        ]
+        observers = names.map { name in
+            center.addObserver(forName: name, object: nil, queue: .main) { [weak self] note in
+                self?.handle(note)
+            }
+        }
+        // Deliberately not calling reconcile() here — `delegate` is set by
+        // the caller right after init, and the caller does the first
+        // reconcile itself once it's ready to receive the callback.
+    }
+
+    deinit {
+        let center = NSWorkspace.shared.notificationCenter
+        observers.forEach { center.removeObserver($0) }
+    }
+
+    private func handle(_ note: Notification) {
+        guard let app = note.userInfo?[NSWorkspace.applicationUserInfoKey] as? NSRunningApplication,
+              app.executableURL?.path == ClaudeControl.binaryPath
+        else { return }
+        reconcile()
+    }
+
+    func markActive(_ name: String) {
+        lastActiveName = name
+    }
+
+    // Public so callers (menu open, right after a command completes) can
+    // force an immediate reconcile as a correctness backstop, without that
+    // being the primary update mechanism.
+    func reconcile() {
+        let profiles = ProfileStore.loadAll()
+        let collisions = ProfileStore.findCollisions(among: profiles)
+        guard collisions.isEmpty else {
+            delegate?.liveStateFoundCollisions(collisions)
+            return
+        }
+
+        let running = ClaudeControl.runningInstances()
+        let infos = profiles.map { profile -> ProfileInfo in
+            let dir = profile.name == "default" ? nil : profile.appDir
+            let match = running.first { $0.userDataDir == dir }
+            return ProfileInfo(profile: profile, running: match != nil, pid: match?.pid)
+        }
+        delegate?.liveStateDidChange(infos)
+    }
+}

Sources/ManageWindow.swift

@@ -0,0 +1,662 @@
+// One ordinary, non-modal window for everything profile-management related
+// — replaces what would otherwise be a string of separate popup alerts.
+// Opened from the menu bar's "Manage Profiles…" item or the standard
+// Cmd+, shortcut. Fixed-size (not user-resizable) — each tab reports its
+// own natural size via preferredContentSize, and NSTabViewController
+// resizes the window to match automatically, so it's never left showing
+// empty space sized for a different tab or state.
+import AppKit
+
+final class ManageWindowController: NSWindowController {
+    static let shared = ManageWindowController()
+
+    enum Tab: Int { case profiles = 0, settings = 1, about = 2 }
+
+    private let profilesVC = ProfilesViewController()
+    private let settingsVC = SettingsViewController()
+    private let aboutVC = AboutViewController()
+    private let tabs = NSTabViewController()
+
+    // Called after a profile is added/removed so the caller can trigger an
+    // immediate LiveState reconcile instead of waiting on the next
+    // notification.
+    var onProfilesChanged: (() -> Void)? {
+        didSet { profilesVC.onChange = onProfilesChanged }
+    }
+
+    private init() {
+        let window = NSWindow(
+            contentRect: NSRect(x: 0, y: 0, width: 420, height: 260),
+            styleMask: [.titled, .closable, .miniaturizable],
+            backing: .buffered, defer: false)
+        window.title = "shannoncoat"
+        window.isReleasedWhenClosed = false
+        window.center()
+
+        profilesVC.title = "Profiles"
+        settingsVC.title = "Settings"
+        aboutVC.title = "About"
+        tabs.addTabViewItem(NSTabViewItem(viewController: profilesVC))
+        tabs.addTabViewItem(NSTabViewItem(viewController: settingsVC))
+        tabs.addTabViewItem(NSTabViewItem(viewController: aboutVC))
+        window.contentViewController = tabs
+
+        super.init(window: window)
+    }
+
+    required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }
+
+    func show(tab: Tab? = nil) {
+        NSApp.activate(ignoringOtherApps: true)
+        if let tab {
+            tabs.selectedTabViewItemIndex = tab.rawValue
+        }
+        window?.makeKeyAndOrderFront(nil)
+    }
+
+    func update(_ infos: [ProfileInfo]) {
+        profilesVC.update(infos)
+    }
+}
+
+// MARK: - Profiles tab
+
+private final class ProfilesViewController: NSViewController, NSTableViewDataSource, NSTableViewDelegate,
+    NSTextFieldDelegate
+{
+    var onChange: (() -> Void)?
+
+    private var infos: [ProfileInfo] = []
+    private let tableView = NSTableView()
+    private let addRemoveControl = NSSegmentedControl()
+    private let detailStack = NSStackView()
+    private let detailAppValue = NSTextField(labelWithString: "")
+    private let detailCodeValue = NSTextField(labelWithString: "")
+    private let detailAppCopyItem = NSMenuItem(title: "Copy Path", action: #selector(copyDetailPath(_:)), keyEquivalent: "")
+    private let detailCodeCopyItem = NSMenuItem(title: "Copy Path", action: #selector(copyDetailPath(_:)), keyEquivalent: "")
+    private let addForm = NSStackView()
+    private let nameField = NSTextField()
+    private let codeField = NSTextField()
+    private let appField = NSTextField()
+    private let errorLabel = NSTextField(labelWithString: "")
+    private var outerStack: NSStackView!
+    private var scrollHeightConstraint: NSLayoutConstraint!
+
+    private static let margin: CGFloat = 20
+    private static let tableWidth: CGFloat = 340
+    private static let minVisibleRows = 3
+    private static let maxVisibleRows = 8
+
+    override func loadView() {
+        view = NSView(frame: NSRect(x: 0, y: 0, width: 420, height: 260))
+
+        let column = NSTableColumn(identifier: .init("profile"))
+        column.title = "Profile"
+        column.width = 340
+        tableView.addTableColumn(column)
+        tableView.headerView = nil
+        tableView.dataSource = self
+        tableView.delegate = self
+        tableView.rowHeight = 24
+        tableView.usesAlternatingRowBackgroundColors = true
+        tableView.menu = buildContextMenu()
+
+        let scroll = NSScrollView()
+        scroll.documentView = tableView
+        scroll.hasVerticalScroller = true
+        scroll.borderType = .bezelBorder
+        scroll.translatesAutoresizingMaskIntoConstraints = false
+
+        addRemoveControl.segmentCount = 2
+        addRemoveControl.trackingMode = .momentary
+        addRemoveControl.segmentStyle = .smallSquare
+        addRemoveControl.setImage(NSImage(systemSymbolName: "plus", accessibilityDescription: "Add Profile"), forSegment: 0)
+        addRemoveControl.setImage(
+            NSImage(systemSymbolName: "minus", accessibilityDescription: "Remove Profile"), forSegment: 1)
+        addRemoveControl.setWidth(28, forSegment: 0)
+        addRemoveControl.setWidth(28, forSegment: 1)
+        addRemoveControl.setEnabled(false, forSegment: 1)
+        addRemoveControl.setToolTip("Add Profile", forSegment: 0)
+        addRemoveControl.setToolTip("Remove Profile", forSegment: 1)
+        addRemoveControl.target = self
+        addRemoveControl.action = #selector(addRemoveClicked(_:))
+        let buttonRow = NSStackView(views: [addRemoveControl, NSView()])
+        buttonRow.orientation = .horizontal
+        buttonRow.translatesAutoresizingMaskIntoConstraints = false
+
+        buildDetailStack()
+        detailStack.isHidden = true
+        detailStack.translatesAutoresizingMaskIntoConstraints = false
+
+        buildAddForm()
+        addForm.isHidden = true
+        addForm.translatesAutoresizingMaskIntoConstraints = false
+
+        let stack = NSStackView(views: [scroll, buttonRow, detailStack, addForm])
+        stack.orientation = .vertical
+        stack.spacing = 12
+        stack.edgeInsets = NSEdgeInsets(top: Self.margin, left: Self.margin, bottom: Self.margin, right: Self.margin)
+        stack.translatesAutoresizingMaskIntoConstraints = false
+        view.addSubview(stack)
+        outerStack = stack
+        scrollHeightConstraint = scroll.heightAnchor.constraint(equalToConstant: heightForRows(0))
+
+        NSLayoutConstraint.activate([
+            stack.topAnchor.constraint(equalTo: view.topAnchor),
+            stack.leadingAnchor.constraint(equalTo: view.leadingAnchor),
+            stack.trailingAnchor.constraint(equalTo: view.trailingAnchor),
+            stack.bottomAnchor.constraint(equalTo: view.bottomAnchor),
+            scroll.widthAnchor.constraint(equalToConstant: Self.tableWidth),
+            scrollHeightConstraint,
+            // `scroll` is the one arranged subview with a real, absolute
+            // width — everything else in this stack ties its width to
+            // *that*, not to `stack` itself (whose own frame spans
+            // edge-to-edge; edgeInsets only govern how the stack lays out
+            // its children, not its own bounds). Left unconstrained, these
+            // rows have no hard width anywhere in their constraint chain —
+            // NSStackView doesn't fill them to the inset content width by
+            // default, so they end up sized/positioned ambiguously (in
+            // practice: flush against the window edge, sometimes wider
+            // than the window).
+            buttonRow.widthAnchor.constraint(equalTo: scroll.widthAnchor),
+            detailStack.widthAnchor.constraint(equalTo: scroll.widthAnchor),
+            addForm.widthAnchor.constraint(equalTo: scroll.widthAnchor),
+        ])
+
+        updatePreferredSize()
+    }
+
+    // Sized to the actual row count (clamped to a sensible range) rather
+    // than one fixed height — with only a couple of profiles that avoids a
+    // big block of empty striped background below the last row; with many
+    // it caps out and scrolls instead of taking over the window.
+    private func heightForRows(_ count: Int) -> CGFloat {
+        let rows = max(Self.minVisibleRows, min(count, Self.maxVisibleRows))
+        return CGFloat(rows) * tableView.rowHeight + 2
+    }
+
+    // NSTabViewController watches its selected child's preferredContentSize
+    // and resizes the window to match live — so recomputing this after
+    // toggling the add form or the path-details row is what makes the
+    // window grow/shrink to fit instead of sitting at one fixed size with
+    // empty space in the states that don't need it.
+    private func updatePreferredSize() {
+        view.layoutSubtreeIfNeeded()
+        preferredContentSize = outerStack.fittingSize
+    }
+
+    // A second, authoritative recompute after every real layout pass —
+    // explicit calls from action handlers (below) update it eagerly for
+    // responsiveness, but this is the one that can't be thrown off by
+    // metrics not being fully resolved yet at the point an eager call runs.
+    override func viewDidLayout() {
+        super.viewDidLayout()
+        preferredContentSize = outerStack.fittingSize
+    }
+
+    // Shows the selected profile's two dirs — the thing you'd otherwise
+    // have to right-click "Reveal" to find out. Not `.isSelectable` — that
+    // makes a label click-into-edit, and the field editor that appears
+    // draws the *untruncated* string at its full intrinsic width, which
+    // can extend past the window and get clipped by it rather than
+    // wrapping or scrolling cleanly. A tooltip (full path) plus a
+    // right-click "Copy Path" menu covers the same "get the value out"
+    // need without that.
+    private func buildDetailStack() {
+        detailAppCopyItem.target = self
+        detailCodeCopyItem.target = self
+        let appMenu = NSMenu()
+        appMenu.addItem(detailAppCopyItem)
+        let codeMenu = NSMenu()
+        codeMenu.addItem(detailCodeCopyItem)
+
+        for (value, menu) in [(detailAppValue, appMenu), (detailCodeValue, codeMenu)] {
+            value.textColor = .secondaryLabelColor
+            value.font = .systemFont(ofSize: NSFont.smallSystemFontSize)
+            value.lineBreakMode = .byTruncatingMiddle
+            value.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
+            value.menu = menu
+        }
+
+        let appRow = NSStackView(views: [labeled("Claude Desktop:"), detailAppValue])
+        appRow.orientation = .horizontal
+        appRow.spacing = 8
+        let codeRow = NSStackView(views: [labeled("Claude Code:"), detailCodeValue])
+        codeRow.orientation = .horizontal
+        codeRow.spacing = 8
+
+        detailStack.orientation = .vertical
+        detailStack.alignment = .leading
+        detailStack.spacing = 4
+        [appRow, codeRow].forEach(detailStack.addArrangedSubview)
+        appRow.widthAnchor.constraint(equalTo: detailStack.widthAnchor).isActive = true
+        codeRow.widthAnchor.constraint(equalTo: detailStack.widthAnchor).isActive = true
+    }
+
+    private func buildAddForm() {
+        nameField.placeholderString = "Profile name"
+        nameField.delegate = self
+
+        for field in [codeField, appField] {
+            field.lineBreakMode = .byTruncatingMiddle
+            field.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
+        }
+
+        codeField.placeholderString = "~/.shannoncoat/data/<name>/code"
+        let codeChoose = NSButton(title: "Choose\u{2026}", target: self, action: #selector(chooseCodeDir))
+        let codeRow = NSStackView(views: [labeled("Claude Code:"), codeField, codeChoose])
+        codeRow.orientation = .horizontal
+        codeRow.spacing = 8
+
+        appField.placeholderString = "~/.shannoncoat/data/<name>/app"
+        let appChoose = NSButton(title: "Choose\u{2026}", target: self, action: #selector(chooseAppDir))
+        let appRow = NSStackView(views: [labeled("Claude Desktop:"), appField, appChoose])
+        appRow.orientation = .horizontal
+        appRow.spacing = 8
+
+        errorLabel.textColor = .systemRed
+        errorLabel.font = .systemFont(ofSize: NSFont.smallSystemFontSize)
+        errorLabel.maximumNumberOfLines = 0
+        errorLabel.lineBreakMode = .byWordWrapping
+
+        let createButton = NSButton(title: "Create", target: self, action: #selector(createProfile))
+        createButton.keyEquivalent = "\r"
+        let cancelButton = NSButton(title: "Cancel", target: self, action: #selector(toggleAddForm))
+        let formButtonRow = NSStackView(views: [NSView(), cancelButton, createButton])
+        formButtonRow.orientation = .horizontal
+        formButtonRow.spacing = 8
+
+        let divider = NSBox()
+        divider.boxType = .separator
+
+        addForm.orientation = .vertical
+        addForm.alignment = .leading
+        addForm.spacing = 10
+        [divider, nameField, codeRow, appRow, errorLabel, formButtonRow].forEach(addForm.addArrangedSubview)
+        divider.widthAnchor.constraint(equalTo: addForm.widthAnchor).isActive = true
+        nameField.widthAnchor.constraint(equalTo: addForm.widthAnchor).isActive = true
+        codeRow.widthAnchor.constraint(equalTo: addForm.widthAnchor).isActive = true
+        appRow.widthAnchor.constraint(equalTo: addForm.widthAnchor).isActive = true
+        formButtonRow.widthAnchor.constraint(equalTo: addForm.widthAnchor).isActive = true
+    }
+
+    // Fixed-width, trailing-aligned label so the fields in a two-row form
+    // (differing label lengths: "Claude Code:" vs "Claude Desktop:") start
+    // at the same x position instead of a ragged left edge.
+    private func labeled(_ text: String) -> NSTextField {
+        let field = NSTextField(labelWithString: text)
+        field.font = .systemFont(ofSize: NSFont.systemFontSize)
+        field.textColor = .secondaryLabelColor
+        field.setContentHuggingPriority(.required, for: .horizontal)
+        field.alignment = .right
+        field.widthAnchor.constraint(equalToConstant: 104).isActive = true
+        return field
+    }
+
+    func update(_ infos: [ProfileInfo]) {
+        self.infos = infos
+        tableView.reloadData()
+        scrollHeightConstraint.constant = heightForRows(infos.count)
+        refreshForSelection()
+    }
+
+    private func refreshForSelection() {
+        let row = tableView.selectedRow
+        guard infos.indices.contains(row) else {
+            addRemoveControl.setEnabled(false, forSegment: 1)
+            detailStack.isHidden = true
+            updatePreferredSize()
+            return
+        }
+        let profile = infos[row].profile
+        addRemoveControl.setEnabled(profile.name != "default", forSegment: 1)
+        detailAppValue.stringValue = profile.appDir
+        detailAppValue.toolTip = profile.appDir
+        detailAppCopyItem.representedObject = profile.appDir
+        detailCodeValue.stringValue = profile.codeDir
+        detailCodeValue.toolTip = profile.codeDir
+        detailCodeCopyItem.representedObject = profile.codeDir
+        detailStack.isHidden = false
+        updatePreferredSize()
+    }
+
+    @objc private func copyDetailPath(_ sender: NSMenuItem) {
+        guard let path = sender.representedObject as? String else { return }
+        NSPasteboard.general.clearContents()
+        NSPasteboard.general.setString(path, forType: .string)
+    }
+
+    // MARK: NSTableViewDataSource / Delegate
+
+    func numberOfRows(in tableView: NSTableView) -> Int { infos.count }
+
+    func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {
+        let identifier = NSUserInterfaceItemIdentifier("profileCell")
+        let info = infos[row]
+        let cell: NSTableCellView
+        if let reused = tableView.makeView(withIdentifier: identifier, owner: self) as? NSTableCellView {
+            cell = reused
+        } else {
+            cell = NSTableCellView()
+            cell.identifier = identifier
+            let imageView = NSImageView()
+            let textField = NSTextField(labelWithString: "")
+            imageView.translatesAutoresizingMaskIntoConstraints = false
+            textField.translatesAutoresizingMaskIntoConstraints = false
+            cell.addSubview(imageView)
+            cell.addSubview(textField)
+            cell.imageView = imageView
+            cell.textField = textField
+            NSLayoutConstraint.activate([
+                imageView.leadingAnchor.constraint(equalTo: cell.leadingAnchor, constant: 6),
+                imageView.centerYAnchor.constraint(equalTo: cell.centerYAnchor),
+                imageView.widthAnchor.constraint(equalToConstant: 10),
+                imageView.heightAnchor.constraint(equalToConstant: 10),
+                textField.leadingAnchor.constraint(equalTo: imageView.trailingAnchor, constant: 8),
+                textField.trailingAnchor.constraint(lessThanOrEqualTo: cell.trailingAnchor, constant: -6),
+                textField.centerYAnchor.constraint(equalTo: cell.centerYAnchor),
+            ])
+        }
+        cell.imageView?.image = ProfileColor.dotImage(for: info.profile.name, dimmed: !info.running)
+
+        let text = NSMutableAttributedString(
+            string: info.profile.name, attributes: [.font: NSFont.systemFont(ofSize: NSFont.systemFontSize)])
+        text.append(NSAttributedString(
+            string: "  \(info.running ? "Running" : "Stopped")",
+            attributes: [
+                .font: NSFont.systemFont(ofSize: NSFont.smallSystemFontSize),
+                .foregroundColor: NSColor.secondaryLabelColor,
+            ]))
+        cell.textField?.attributedStringValue = text
+        return cell
+    }
+
+    func tableViewSelectionDidChange(_ notification: Notification) {
+        refreshForSelection()
+    }
+
+    // MARK: NSTextFieldDelegate — live default-path preview as the name is typed
+
+    func controlTextDidChange(_ obj: Notification) {
+        guard (obj.object as? NSTextField) === nameField else { return }
+        let name = nameField.stringValue.isEmpty ? "<name>" : nameField.stringValue
+        codeField.placeholderString = "~/.shannoncoat/data/\(name)/code"
+        appField.placeholderString = "~/.shannoncoat/data/\(name)/app"
+    }
+
+    // MARK: Actions
+
+    @objc private func addRemoveClicked(_ sender: NSSegmentedControl) {
+        switch sender.selectedSegment {
+        case 0: toggleAddForm()
+        case 1: removeSelected()
+        default: break
+        }
+    }
+
+    @objc private func toggleAddForm() {
+        addForm.isHidden.toggle()
+        if !addForm.isHidden {
+            nameField.stringValue = ""
+            codeField.stringValue = ""
+            appField.stringValue = ""
+            errorLabel.stringValue = ""
+            view.window?.makeFirstResponder(nameField)
+        }
+        updatePreferredSize()
+    }
+
+    @objc private func chooseCodeDir() { choose(into: codeField) }
+    @objc private func chooseAppDir() { choose(into: appField) }
+
+    private func choose(into field: NSTextField) {
+        let panel = NSOpenPanel()
+        panel.canChooseDirectories = true
+        panel.canChooseFiles = false
+        panel.allowsMultipleSelection = false
+        guard let window = view.window else { return }
+        panel.beginSheetModal(for: window) { response in
+            if response == .OK, let url = panel.url {
+                field.stringValue = url.path
+            }
+        }
+    }
+
+    @objc private func createProfile() {
+        let name = nameField.stringValue.trimmingCharacters(in: .whitespacesAndNewlines)
+        let code = codeField.stringValue.trimmingCharacters(in: .whitespacesAndNewlines)
+        let app = appField.stringValue.trimmingCharacters(in: .whitespacesAndNewlines)
+        do {
+            try ProfileStore.create(name: name, codeDir: code.isEmpty ? nil : code, appDir: app.isEmpty ? nil : app)
+            toggleAddForm()
+            onChange?()
+        } catch {
+            errorLabel.stringValue = (error as? LocalizedError)?.errorDescription ?? "\(error)"
+            updatePreferredSize()
+        }
+    }
+
+    @objc private func removeSelected() {
+        let row = tableView.selectedRow
+        guard infos.indices.contains(row) else { return }
+        let info = infos[row]
+        guard info.profile.name != "default", let window = view.window else { return }
+
+        let alert = NSAlert()
+        alert.alertStyle = .warning
+        alert.messageText = "Delete profile \u{201C}\(info.profile.name)\u{201D}?"
+        alert.informativeText = info.running
+            ? "This profile is currently running \u{2014} deleting it will quit Claude first. Its Claude Desktop and Claude Code data stay on disk; only the profile pointer is removed."
+            : "Its Claude Desktop and Claude Code data stay on disk; only the profile pointer is removed."
+        alert.addButton(withTitle: "Delete")
+        alert.addButton(withTitle: "Cancel")
+        alert.buttons.first?.hasDestructiveAction = true
+
+        alert.beginSheetModal(for: window) { [weak self] response in
+            guard response == .alertFirstButtonReturn else { return }
+            let finish = {
+                try? ProfileStore.delete(info.profile.name)
+                self?.onChange?()
+            }
+            if info.running, let pid = info.pid {
+                ClaudeControl.quit(pid: pid) { _ in DispatchQueue.main.async(execute: finish) }
+            } else {
+                finish()
+            }
+        }
+    }
+
+    private func buildContextMenu() -> NSMenu {
+        let menu = NSMenu()
+        let revealCode = NSMenuItem(title: "Reveal Code Folder", action: #selector(revealCodeDir), keyEquivalent: "")
+        revealCode.target = self
+        let revealApp = NSMenuItem(
+            title: "Reveal Desktop Folder", action: #selector(revealAppDir), keyEquivalent: "")
+        revealApp.target = self
+        menu.addItem(revealCode)
+        menu.addItem(revealApp)
+        return menu
+    }
+
+    private func clickedInfo() -> ProfileInfo? {
+        let row = tableView.clickedRow
+        guard infos.indices.contains(row) else { return nil }
+        return infos[row]
+    }
+
+    @objc private func revealCodeDir() {
+        guard let info = clickedInfo() else { return }
+        NSWorkspace.shared.selectFile(nil, inFileViewerRootedAtPath: info.profile.codeDir)
+    }
+
+    @objc private func revealAppDir() {
+        guard let info = clickedInfo() else { return }
+        NSWorkspace.shared.selectFile(nil, inFileViewerRootedAtPath: info.profile.appDir)
+    }
+}
+
+// MARK: - Settings tab
+
+private final class SettingsViewController: NSViewController {
+    private let autoUpdateCheckbox = NSButton(
+        checkboxWithTitle: "Automatically check for updates", target: nil, action: nil)
+    private let launchAtLoginCheckbox = NSButton(checkboxWithTitle: "Launch at Login", target: nil, action: nil)
+    private let checkNowButton = NSButton(title: "Check for Updates\u{2026}", target: nil, action: nil)
+    private var stack: NSStackView!
+
+    override func loadView() {
+        view = NSView(frame: NSRect(x: 0, y: 0, width: 420, height: 150))
+
+        launchAtLoginCheckbox.target = self
+        launchAtLoginCheckbox.action = #selector(toggleLaunchAtLogin)
+        launchAtLoginCheckbox.state = LaunchAtLogin.isEnabled ? .on : .off
+
+        autoUpdateCheckbox.target = self
+        autoUpdateCheckbox.action = #selector(toggleAutoUpdate)
+        autoUpdateCheckbox.state = UpdateChecker.automaticCheckEnabled ? .on : .off
+
+        checkNowButton.target = self
+        checkNowButton.action = #selector(checkNow)
+        checkNowButton.bezelStyle = .rounded
+
+        stack = NSStackView(views: [launchAtLoginCheckbox, autoUpdateCheckbox, checkNowButton])
+        stack.orientation = .vertical
+        stack.alignment = .leading
+        stack.spacing = 14
+        stack.edgeInsets = NSEdgeInsets(top: 20, left: 20, bottom: 20, right: 20)
+        stack.translatesAutoresizingMaskIntoConstraints = false
+        view.addSubview(stack)
+        NSLayoutConstraint.activate([
+            stack.topAnchor.constraint(equalTo: view.topAnchor),
+            stack.leadingAnchor.constraint(equalTo: view.leadingAnchor),
+            stack.trailingAnchor.constraint(lessThanOrEqualTo: view.trailingAnchor),
+            stack.bottomAnchor.constraint(equalTo: view.bottomAnchor),
+        ])
+
+        updatePreferredSize()
+    }
+
+    override func viewDidLayout() {
+        super.viewDidLayout()
+        updatePreferredSize()
+    }
+
+    // NOT `stack.fittingSize` for the width — that was measured observing
+    // it clip a checkbox's label by a consistent amount regardless of
+    // when it's read (loadView vs. viewDidLayout: same result), so this
+    // isn't a measure-too-early timing issue, it's `NSStackView.fittingSize`
+    // itself undercounting a checkbox's true rendered width. Asking each
+    // control directly for its own `intrinsicContentSize` instead — which
+    // is what AutoLayout itself uses to size an unconstrained control —
+    // sidesteps whatever the stack's own aggregation is getting wrong.
+    private func updatePreferredSize() {
+        let widest = [launchAtLoginCheckbox, autoUpdateCheckbox, checkNowButton]
+            .map(\.intrinsicContentSize.width)
+            .max() ?? 200
+        preferredContentSize = NSSize(width: widest + 40, height: stack.fittingSize.height)
+    }
+
+    @objc private func toggleLaunchAtLogin() {
+        do {
+            if launchAtLoginCheckbox.state == .on {
+                try LaunchAtLogin.enable()
+            } else {
+                try LaunchAtLogin.disable()
+            }
+        } catch {
+            launchAtLoginCheckbox.state = LaunchAtLogin.isEnabled ? .on : .off
+            NSAlert(error: error).runModal()
+        }
+    }
+
+    @objc private func toggleAutoUpdate() {
+        UpdateChecker.automaticCheckEnabled = autoUpdateCheckbox.state == .on
+    }
+
+    @objc private func checkNow() {
+        UpdateChecker.checkManually { result in
+            DispatchQueue.main.async {
+                let alert = NSAlert()
+                switch result {
+                case .upToDate:
+                    alert.messageText = "You're up to date."
+                    alert.runModal()
+                case .updateAvailable(let version, let url):
+                    alert.messageText = "shannoncoat \(version) is available"
+                    alert.addButton(withTitle: "View Release")
+                    alert.addButton(withTitle: "Later")
+                    if alert.runModal() == .alertFirstButtonReturn {
+                        NSWorkspace.shared.open(url)
+                    }
+                case .failed:
+                    alert.alertStyle = .warning
+                    alert.messageText = "Couldn't check for updates."
+                    alert.runModal()
+                }
+            }
+        }
+    }
+}
+
+// MARK: - About tab
+
+private let projectAuthor = "bdeshi"
+private let projectHomepage = "https://github.com/bdeshi/shannoncoat"
+
+private final class AboutViewController: NSViewController {
+    private static let contentWidth: CGFloat = 340
+
+    override func loadView() {
+        view = NSView(frame: NSRect(x: 0, y: 0, width: 420, height: 150))
+
+        // Centered within a full-width wrapper rather than centered in the
+        // stack directly — the stack is leading-aligned (for the text
+        // rows below), and its own per-arranged-subview alignment
+        // constraint on the icon would conflict with an added centering
+        // constraint on the icon itself.
+        let icon = NSImageView()
+        icon.image = NSApp.applicationIconImage ?? NSImage(named: NSImage.applicationIconName)
+        icon.translatesAutoresizingMaskIntoConstraints = false
+        let iconContainer = NSView()
+        iconContainer.translatesAutoresizingMaskIntoConstraints = false
+        iconContainer.addSubview(icon)
+        NSLayoutConstraint.activate([
+            icon.widthAnchor.constraint(equalToConstant: 96),
+            icon.heightAnchor.constraint(equalToConstant: 96),
+            icon.topAnchor.constraint(equalTo: iconContainer.topAnchor),
+            icon.bottomAnchor.constraint(equalTo: iconContainer.bottomAnchor),
+            icon.centerXAnchor.constraint(equalTo: iconContainer.centerXAnchor),
+        ])
+
+        let description = NSTextField(wrappingLabelWithString:
+            "Runs multiple Claude Desktop profiles side by side, each paired with its own isolated Claude Code config.")
+        description.font = .systemFont(ofSize: NSFont.systemFontSize)
+
+        let authorField = NSTextField(labelWithString: "Author: \(projectAuthor)")
+        let sourceField = NSTextField(labelWithString: "Source: \(projectHomepage)")
+        let versionField = NSTextField(labelWithString: "Version: \(UpdateChecker.displayVersion)")
+        for field in [authorField, sourceField, versionField] {
+            field.textColor = .secondaryLabelColor
+            field.font = .systemFont(ofSize: NSFont.smallSystemFontSize)
+        }
+
+        let stack = NSStackView(views: [iconContainer, description, authorField, sourceField, versionField])
+        stack.orientation = .vertical
+        stack.alignment = .leading
+        stack.spacing = 10
+        stack.edgeInsets = NSEdgeInsets(top: 20, left: 20, bottom: 20, right: 20)
+        stack.translatesAutoresizingMaskIntoConstraints = false
+        view.addSubview(stack)
+
+        NSLayoutConstraint.activate([
+            stack.topAnchor.constraint(equalTo: view.topAnchor),
+            stack.leadingAnchor.constraint(equalTo: view.leadingAnchor),
+            stack.bottomAnchor.constraint(equalTo: view.bottomAnchor),
+            description.widthAnchor.constraint(equalToConstant: Self.contentWidth),
+            iconContainer.widthAnchor.constraint(equalTo: description.widthAnchor),
+        ])
+
+        view.layoutSubtreeIfNeeded()
+        preferredContentSize = NSSize(width: Self.contentWidth + 40, height: stack.fittingSize.height)
+    }
+}

Sources/ProcessInspector.swift

@@ -0,0 +1,86 @@
+// Enumerates running Claude processes and their --user-data-dir, without
+// spawning pgrep (avoids both the subprocess-per-check overhead and an
+// assumption that /usr/bin/pgrep exists at a fixed path). Uses the same
+// sysctl(KERN_PROC_ALL)/sysctl(KERN_PROCARGS2) technique ps/pgrep use
+// internally for same-user processes — no extra entitlement needed.
+//
+// Called on demand from live-state notification handlers (see AppDelegate),
+// never on a timer.
+import Darwin
+import Foundation
+
+struct RunningClaude {
+    let pid: pid_t
+    // nil means launched with no --user-data-dir flag at all (i.e. the
+    // "default" profile).
+    let userDataDir: String?
+}
+
+enum ProcessInspector {
+    static func listRunningClaude(binaryPath: String) -> [RunningClaude] {
+        allPIDs().compactMap { pid in
+            guard let info = execInfo(pid: pid), info.execPath == binaryPath else { return nil }
+            let flagPrefix = "--user-data-dir="
+            let dir = info.args.first(where: { $0.hasPrefix(flagPrefix) }).map { String($0.dropFirst(flagPrefix.count)) }
+            return RunningClaude(pid: pid, userDataDir: dir)
+        }
+    }
+
+    static func pid(forUserDataDir dir: String?, binaryPath: String) -> pid_t? {
+        listRunningClaude(binaryPath: binaryPath).first { $0.userDataDir == dir }?.pid
+    }
+
+    private static func allPIDs() -> [pid_t] {
+        var mib: [Int32] = [CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0]
+        var size = 0
+        guard sysctl(&mib, 4, nil, &size, nil, 0) == 0, size > 0 else { return [] }
+
+        let capacity = size / MemoryLayout<kinfo_proc>.stride + 1
+        var procs = [kinfo_proc](repeating: kinfo_proc(), count: capacity)
+        var actualSize = capacity * MemoryLayout<kinfo_proc>.stride
+        guard sysctl(&mib, 4, &procs, &actualSize, nil, 0) == 0 else { return [] }
+
+        let actualCount = actualSize / MemoryLayout<kinfo_proc>.stride
+        return procs[0..<actualCount].map { $0.kp_proc.p_pid }
+    }
+
+    private struct ExecInfo { let execPath: String; let args: [String] }
+
+    // KERN_PROCARGS2 buffer layout: argc (Int32), then the exec path
+    // (NUL-terminated, followed by NUL padding), then argv[0..<argc] each
+    // NUL-terminated, then envp (which we don't read). Same layout `ps`
+    // itself parses.
+    private static func execInfo(pid: pid_t) -> ExecInfo? {
+        var mib: [Int32] = [CTL_KERN, KERN_PROCARGS2, pid]
+        var size = 0
+        guard sysctl(&mib, 3, nil, &size, nil, 0) == 0, size > MemoryLayout<Int32>.size else { return nil }
+
+        var buffer = [UInt8](repeating: 0, count: size)
+        guard sysctl(&mib, 3, &buffer, &size, nil, 0) == 0 else { return nil }
+
+        var argc = Int32(0)
+        withUnsafeMutableBytes(of: &argc) { dst in
+            dst.copyBytes(from: buffer[0..<MemoryLayout<Int32>.size])
+        }
+
+        var offset = MemoryLayout<Int32>.size
+        func readCString() -> String? {
+            guard offset < size else { return nil }
+            let start = offset
+            while offset < size, buffer[offset] != 0 { offset += 1 }
+            guard offset > start else { return nil }
+            let string = String(decoding: buffer[start..<offset], as: UTF8.self)
+            while offset < size, buffer[offset] == 0 { offset += 1 } // skip padding NULs
+            return string
+        }
+
+        guard let execPath = readCString() else { return nil }
+        var args: [String] = []
+        var i: Int32 = 0
+        while i < argc, let arg = readCString() {
+            args.append(arg)
+            i += 1
+        }
+        return ExecInfo(execPath: execPath, args: args)
+    }
+}

Sources/ProfileColor.swift

@@ -0,0 +1,48 @@
+// A stable, well-distributed color per profile name, shared by the menu
+// bar dots and the Manage window's profile list so the same name always
+// reads as the same color everywhere.
+import AppKit
+
+enum ProfileColor {
+    // FNV-1a: a proper avalanching hash, not a preset-palette lookup — the
+    // full hue wheel is available, and single-character name edits (e.g.
+    // "personal" vs "personal2") land on unrelated hues instead of an
+    // adjacent bucket the way a plain sum-of-scalars hash mod'd into a
+    // short color list would.
+    private static func fnv1aHash(_ s: String) -> UInt32 {
+        var hash: UInt32 = 0x811c_9dc5
+        for byte in s.utf8 {
+            hash ^= UInt32(byte)
+            hash = hash &* 0x0100_0193
+        }
+        return hash
+    }
+
+    // A brightness/saturation pair that reads clearly on its own
+    // background — a color bright enough to pop on a dark menu would wash
+    // out on a light one, and vice versa, so this picks per current
+    // appearance rather than using one fixed value for both.
+    private static func isDarkAppearance() -> Bool {
+        NSApp.effectiveAppearance.bestMatch(from: [.aqua, .darkAqua]) == .darkAqua
+    }
+
+    static func dotColor(for name: String) -> NSColor {
+        let hue = CGFloat(fnv1aHash(name) % 360) / 360.0
+        let (saturation, brightness): (CGFloat, CGFloat) = isDarkAppearance() ? (0.90, 1.0) : (1.0, 0.55)
+        return NSColor(calibratedHue: hue, saturation: saturation, brightness: brightness, alpha: 1.0)
+    }
+
+    // `dimmed` marks a profile that isn't actually running right now — the
+    // colored dot still identifies it, but faded, so "open" vs "known but
+    // closed" is visible without reading a tooltip.
+    static func dotImage(for name: String, dimmed: Bool = false) -> NSImage {
+        let size = NSSize(width: 10, height: 10)
+        let image = NSImage(size: size)
+        image.lockFocus()
+        dotColor(for: name).withAlphaComponent(dimmed ? 0.3 : 1.0).setFill()
+        NSBezierPath(ovalIn: NSRect(origin: .zero, size: size)).fill()
+        image.unlockFocus()
+        image.isTemplate = false
+        return image
+    }
+}

Sources/ProfileStore.swift

@@ -0,0 +1,180 @@
+// Profile config storage: one ~/.shannoncoat/<name>.json per profile,
+// holding the two dirs a profile needs — Claude Desktop's --user-data-dir,
+// and the CLAUDE_CONFIG_DIR paired with it so any Claude Code session
+// launched from that Desktop instance gets its own isolated config too,
+// instead of sharing one with every other profile. (Claude Code already
+// has its own profile mechanism for use outside Desktop — this isn't a
+// second one, just making sure a managed Desktop session doesn't leak
+// into it.) "default" is implicit — no file for it — and always means the
+// real, untouched ~/.claude + Application Support/Claude.
+import Foundation
+
+struct ResolvedProfile: Equatable {
+    let name: String
+    let codeDir: String
+    let appDir: String
+}
+
+enum ProfileError: LocalizedError {
+    case emptyName
+    case reservedName
+    case invalidName(String)
+    case alreadyExists(String)
+    case notFound(String)
+    case dirCollision(existingProfile: String, dir: String, kind: String)
+
+    var errorDescription: String? {
+        switch self {
+        case .emptyName:
+            return "Name is required."
+        case .reservedName:
+            return "\"default\" is reserved for the real, untouched Claude install."
+        case .invalidName(let name):
+            return "\"\(name)\" isn't a valid profile name (no spaces, slashes, colons, or leading dots)."
+        case .alreadyExists(let name):
+            return "A profile named \"\(name)\" already exists."
+        case .notFound(let name):
+            return "No profile named \"\(name)\"."
+        case .dirCollision(let existingProfile, let dir, let kind):
+            return "\(kind) dir \(dir) is already used by profile \"\(existingProfile)\"."
+        }
+    }
+}
+
+// What lives on disk. Profile name comes from the filename, not a field in
+// here, so there's only one place a profile's name can disagree with
+// itself. `paths` is nested (matching the old YAML's shape) rather than
+// flattened, so a later profile-specific feature has an obvious place to
+// add its own top-level key alongside `paths` without disturbing this one.
+private struct ProfileFile: Codable {
+    var paths: Paths
+
+    struct Paths: Codable {
+        var code: String
+        var desktop: String
+    }
+}
+
+enum ProfileStore {
+    static let root: URL = {
+        let url = FileManager.default.homeDirectoryForCurrentUser.appendingPathComponent(".shannoncoat")
+        try? FileManager.default.createDirectory(at: url, withIntermediateDirectories: true)
+        return url
+    }()
+
+    static let defaultProfile = ResolvedProfile(
+        name: "default",
+        codeDir: FileManager.default.homeDirectoryForCurrentUser.appendingPathComponent(".claude").path,
+        appDir: FileManager.default.homeDirectoryForCurrentUser
+            .appendingPathComponent("Library/Application Support/Claude").path
+    )
+
+    // "~" expands to home; anything else non-absolute resolves relative to
+    // `root` (the config dir itself) rather than the process's cwd; an
+    // already-absolute path is left alone.
+    static func expand(_ raw: String) -> String {
+        if raw.hasPrefix("~") {
+            return (raw as NSString).expandingTildeInPath
+        }
+        if raw.hasPrefix("/") {
+            return raw
+        }
+        return root.appendingPathComponent(raw).path
+    }
+
+    static func validateName(_ name: String) throws {
+        if name.isEmpty { throw ProfileError.emptyName }
+        if name == "default" { throw ProfileError.reservedName }
+        let hasBadChar = name.contains("/") || name.contains(":") || name.hasPrefix(".")
+            || name.rangeOfCharacter(from: .whitespacesAndNewlines) != nil
+        if hasBadChar { throw ProfileError.invalidName(name) }
+    }
+
+    private static func configURL(for name: String) -> URL {
+        root.appendingPathComponent("\(name).json")
+    }
+
+    // Every configured profile plus the implicit `default`, in no
+    // particular order. Config files that fail to decode are skipped
+    // rather than surfaced here — a hand-edited-into-garbage file
+    // shouldn't take the whole menu down.
+    static func loadAll() -> [ResolvedProfile] {
+        var profiles = [defaultProfile]
+        let files = (try? FileManager.default.contentsOfDirectory(
+            at: root, includingPropertiesForKeys: nil)) ?? []
+        for file in files where file.pathExtension == "json" {
+            guard let data = try? Data(contentsOf: file),
+                  let profileFile = try? JSONDecoder().decode(ProfileFile.self, from: data)
+            else { continue }
+            let name = file.deletingPathExtension().lastPathComponent
+            profiles.append(ResolvedProfile(
+                name: name, codeDir: expand(profileFile.paths.code), appDir: expand(profileFile.paths.desktop)))
+        }
+        return profiles
+    }
+
+    struct DirCollision { let profileA: String; let profileB: String; let dir: String; let kind: String }
+
+    // Two profiles secretly sharing a dir would silently merge their Claude
+    // sessions — defeats the entire point of switching. Checked on every
+    // load (see `loadAll` call sites), not just when a profile is created,
+    // so a hand-edited file can't sneak one in unnoticed.
+    static func findCollisions(among profiles: [ResolvedProfile]) -> [DirCollision] {
+        var collisions: [DirCollision] = []
+        for i in profiles.indices {
+            for j in profiles.index(after: i)..<profiles.endIndex {
+                if profiles[i].codeDir == profiles[j].codeDir {
+                    collisions.append(DirCollision(
+                        profileA: profiles[i].name, profileB: profiles[j].name,
+                        dir: profiles[i].codeDir, kind: "Claude Code"))
+                }
+                if profiles[i].appDir == profiles[j].appDir {
+                    collisions.append(DirCollision(
+                        profileA: profiles[i].name, profileB: profiles[j].name,
+                        dir: profiles[i].appDir, kind: "Claude Desktop"))
+                }
+            }
+        }
+        return collisions
+    }
+
+    @discardableResult
+    static func create(name: String, codeDir: String?, appDir: String?) throws -> ResolvedProfile {
+        try validateName(name)
+        let url = configURL(for: name)
+        guard !FileManager.default.fileExists(atPath: url.path) else {
+            throw ProfileError.alreadyExists(name)
+        }
+
+        let rawCode = codeDir?.isEmpty == false ? codeDir! : "data/\(name)/code"
+        let rawApp = appDir?.isEmpty == false ? appDir! : "data/\(name)/app"
+        let resolvedCode = expand(rawCode)
+        let resolvedApp = expand(rawApp)
+
+        for existing in loadAll() {
+            if existing.codeDir == resolvedCode {
+                throw ProfileError.dirCollision(existingProfile: existing.name, dir: resolvedCode, kind: "Claude Code")
+            }
+            if existing.appDir == resolvedApp {
+                throw ProfileError.dirCollision(existingProfile: existing.name, dir: resolvedApp, kind: "Claude Desktop")
+            }
+        }
+
+        try FileManager.default.createDirectory(atPath: resolvedCode, withIntermediateDirectories: true)
+        try FileManager.default.createDirectory(atPath: resolvedApp, withIntermediateDirectories: true)
+
+        let encoder = JSONEncoder()
+        encoder.outputFormatting = [.prettyPrinted, .sortedKeys, .withoutEscapingSlashes]
+        let data = try encoder.encode(ProfileFile(paths: .init(code: rawCode, desktop: rawApp)))
+        try data.write(to: url)
+
+        return ResolvedProfile(name: name, codeDir: resolvedCode, appDir: resolvedApp)
+    }
+
+    static func delete(_ name: String) throws {
+        guard name != "default" else { throw ProfileError.reservedName }
+        let url = configURL(for: name)
+        guard FileManager.default.fileExists(atPath: url.path) else { throw ProfileError.notFound(name) }
+        try FileManager.default.removeItem(at: url)
+    }
+}

Sources/UpdateChecker.swift

@@ -0,0 +1,105 @@
+// Deliberately minimal: fetch the raw VERSION file from `main` on GitHub
+// and compare semver to the bundled version. No silent binary-replacing
+// auto-update — that needs signing/notarization/an appcast server this
+// project doesn't have. A manual check shows an alert (an explicit action
+// that expects a response); the periodic automatic check instead posts a
+// quiet system notification, since that one wasn't asked for in the
+// moment.
+import Foundation
+import UserNotifications
+
+enum UpdateChecker {
+    enum Outcome {
+        case upToDate
+        case updateAvailable(version: String, url: URL)
+        case failed
+    }
+
+    private static let versionURL = URL(string: "https://raw.githubusercontent.com/bdeshi/shannoncoat/main/VERSION")!
+    private static let releaseURL = URL(string: "https://github.com/bdeshi/shannoncoat/releases/latest")!
+    private static let enabledDefaultsKey = "AutomaticUpdateCheckEnabled"
+    private static let lastCheckDefaultsKey = "LastUpdateCheckDate"
+    private static let checkInterval: TimeInterval = 24 * 60 * 60
+
+    static var automaticCheckEnabled: Bool {
+        get { UserDefaults.standard.object(forKey: enabledDefaultsKey) as? Bool ?? true }
+        set { UserDefaults.standard.set(newValue, forKey: enabledDefaultsKey) }
+    }
+
+    static var currentVersion: String {
+        guard let resourceURL = Bundle.main.resourceURL,
+              let contents = try? String(contentsOf: resourceURL.appendingPathComponent("VERSION"), encoding: .utf8)
+        else { return "unknown" }
+        return contents.trimmingCharacters(in: .whitespacesAndNewlines)
+    }
+
+    // What the About panel shows: the version alone for a real release
+    // build (COMMIT is written empty when build.sh finds HEAD sitting
+    // exactly on a tag), or version + short SHA for a dev build, so two
+    // local builds off the same version number are distinguishable.
+    static var displayVersion: String {
+        commitSHA.isEmpty ? currentVersion : "\(currentVersion) (\(commitSHA))"
+    }
+
+    private static var commitSHA: String {
+        guard let resourceURL = Bundle.main.resourceURL,
+              let contents = try? String(contentsOf: resourceURL.appendingPathComponent("COMMIT"), encoding: .utf8)
+        else { return "" }
+        return contents.trimmingCharacters(in: .whitespacesAndNewlines)
+    }
+
+    static func checkManually(completion: @escaping (Outcome) -> Void) {
+        fetchLatestVersion { latest in
+            guard let latest else { completion(.failed); return }
+            if isNewer(latest, than: currentVersion) {
+                completion(.updateAvailable(version: latest, url: releaseURL))
+            } else {
+                completion(.upToDate)
+            }
+        }
+    }
+
+    // Called once at launch; a no-op unless the toggle is on and it's been
+    // at least a day since the last check.
+    static func checkAutomaticallyIfDue() {
+        guard automaticCheckEnabled else { return }
+        let last = UserDefaults.standard.object(forKey: lastCheckDefaultsKey) as? Date ?? .distantPast
+        guard Date().timeIntervalSince(last) > checkInterval else { return }
+        UserDefaults.standard.set(Date(), forKey: lastCheckDefaultsKey)
+
+        fetchLatestVersion { latest in
+            guard let latest, isNewer(latest, than: currentVersion) else { return }
+            postAvailableNotification(version: latest)
+        }
+    }
+
+    private static func fetchLatestVersion(completion: @escaping (String?) -> Void) {
+        URLSession.shared.dataTask(with: versionURL) { data, _, _ in
+            let version = data.flatMap { String(data: $0, encoding: .utf8) }?
+                .trimmingCharacters(in: .whitespacesAndNewlines)
+            completion((version?.isEmpty == false) ? version : nil)
+        }.resume()
+    }
+
+    private static func isNewer(_ a: String, than b: String) -> Bool {
+        let av = a.split(separator: ".").compactMap { Int($0) }
+        let bv = b.split(separator: ".").compactMap { Int($0) }
+        for i in 0..<max(av.count, bv.count) {
+            let x = i < av.count ? av[i] : 0
+            let y = i < bv.count ? bv[i] : 0
+            if x != y { return x > y }
+        }
+        return false
+    }
+
+    private static func postAvailableNotification(version: String) {
+        let center = UNUserNotificationCenter.current()
+        center.requestAuthorization(options: [.alert]) { granted, _ in
+            guard granted else { return }
+            let content = UNMutableNotificationContent()
+            content.title = "shannoncoat \(version) is available"
+            content.body = "Click to view the release notes."
+            center.add(UNNotificationRequest(identifier: "shannoncoat-update-available", content: content, trigger: nil))
+        }
+    }
+}

Sources/WindowOverlay.swift

@@ -0,0 +1,231 @@
+// A small floating tag pinned to a Claude window's corner, showing which
+// profile it belongs to — every profile launches the same app with the
+// same icon and title, so there's otherwise no way to tell two open
+// Claude windows apart at a glance. Kept in sync live via AXObserver
+// notifications (move/resize/miniaturize/destroy) rather than polling —
+// only a persistent process can hold a watcher like this at all, which is
+// exactly the gap the old one-shot CLI script couldn't close.
+import AppKit
+import ApplicationServices
+
+// The tag's position relative to its window's top-right corner, shared
+// across every open tag and persisted so a drag survives a relaunch.
+// Anchored from the right/top edges (not left) because that's the corner
+// that stays put under the common resize gesture (dragging the bottom-right
+// handle) — an offset-from-left would drift away from a user's chosen spot
+// every time the window changed width.
+enum WindowOverlayPosition {
+    private static let rightInsetKey = "WindowOverlayRightInset"
+    private static let topInsetKey = "WindowOverlayTopInset"
+
+    // Top-right by default — top-left is where every window's close/
+    // minimize/zoom controls live, which the tag must never sit over.
+    static let defaultRightInset: CGFloat = 10
+    static let defaultTopInset: CGFloat = 6
+
+    static var rightInset: CGFloat {
+        get { (UserDefaults.standard.object(forKey: rightInsetKey) as? Double).map { CGFloat($0) } ?? defaultRightInset }
+        set { UserDefaults.standard.set(Double(newValue), forKey: rightInsetKey) }
+    }
+
+    static var topInset: CGFloat {
+        get { (UserDefaults.standard.object(forKey: topInsetKey) as? Double).map { CGFloat($0) } ?? defaultTopInset }
+        set { UserDefaults.standard.set(Double(newValue), forKey: topInsetKey) }
+    }
+}
+
+final class WindowOverlay: NSObject, NSWindowDelegate {
+    let pid: pid_t
+    private let axWindow: AXUIElement
+    private var observer: AXObserver?
+    private let panel: NSPanel
+
+    private static let tagSize = NSSize(width: 110, height: 20)
+
+    init?(profileName: String, color: NSColor, pid: pid_t) {
+        let axApp = AXUIElementCreateApplication(pid)
+        guard let window = Self.firstWindow(of: axApp) else { return nil }
+        self.pid = pid
+        self.axWindow = window
+
+        let panel = NSPanel(
+            contentRect: NSRect(origin: .zero, size: Self.tagSize),
+            styleMask: [.borderless, .nonactivatingPanel],
+            backing: .buffered, defer: false)
+        panel.isOpaque = false
+        panel.backgroundColor = .clear
+        panel.hasShadow = true
+        panel.level = .floating
+        // Draggable (so it can be moved off whatever it's obstructing),
+        // but .nonactivatingPanel keeps a click/drag from stealing focus
+        // away from the Claude window underneath.
+        panel.isMovableByWindowBackground = true
+        panel.collectionBehavior = [.stationary, .ignoresCycle]
+
+        let background = NSView(frame: NSRect(origin: .zero, size: Self.tagSize))
+        background.wantsLayer = true
+        background.layer?.backgroundColor = color.cgColor
+        background.layer?.cornerRadius = 5
+
+        let label = NSTextField(labelWithString: profileName)
+        label.frame = NSRect(origin: .zero, size: Self.tagSize)
+        label.alignment = .center
+        label.font = .systemFont(ofSize: 11, weight: .semibold)
+        label.textColor = .white
+        label.drawsBackground = false
+        label.lineBreakMode = .byTruncatingTail
+        background.addSubview(label)
+
+        panel.contentView = background
+        self.panel = panel
+        super.init()
+        panel.delegate = self
+
+        guard reposition() else { return nil }
+        startObserving()
+    }
+
+    // A cold Electron launch can take a second or more between the
+    // process starting (which is what triggers `updateWindowOverlays`,
+    // via NSWorkspace's launch notification) and its first window
+    // actually existing — the same race ClaudeControl.focus's
+    // waitForWindow already handles for the same reason. `init?` can't
+    // retry on its own (once it returns nil, that attempt is done), so
+    // this polls it every quarter second for up to ~3s before giving up.
+    static func attach(
+        profileName: String, color: NSColor, pid: pid_t, attemptsRemaining: Int = 12,
+        completion: @escaping (WindowOverlay?) -> Void
+    ) {
+        if let overlay = WindowOverlay(profileName: profileName, color: color, pid: pid) {
+            completion(overlay)
+        } else if attemptsRemaining > 0 {
+            DispatchQueue.main.asyncAfter(deadline: .now() + 0.25) {
+                attach(
+                    profileName: profileName, color: color, pid: pid, attemptsRemaining: attemptsRemaining - 1,
+                    completion: completion)
+            }
+        } else {
+            completion(nil)
+        }
+    }
+
+    deinit {
+        stopObserving()
+        panel.orderOut(nil)
+    }
+
+    private static func firstWindow(of axApp: AXUIElement) -> AXUIElement? {
+        var value: CFTypeRef?
+        guard AXUIElementCopyAttributeValue(axApp, kAXWindowsAttribute as CFString, &value) == .success,
+              let windows = value as? [AXUIElement], let first = windows.first
+        else { return nil }
+        return first
+    }
+
+    private static func frame(of window: AXUIElement) -> CGRect? {
+        var posValue: CFTypeRef?
+        var sizeValue: CFTypeRef?
+        guard AXUIElementCopyAttributeValue(window, kAXPositionAttribute as CFString, &posValue) == .success,
+              AXUIElementCopyAttributeValue(window, kAXSizeAttribute as CFString, &sizeValue) == .success,
+              CFGetTypeID(posValue) == AXValueGetTypeID(), CFGetTypeID(sizeValue) == AXValueGetTypeID()
+        else { return nil }
+        var point = CGPoint.zero
+        var size = CGSize.zero
+        guard AXValueGetValue(posValue as! AXValue, .cgPoint, &point),
+              AXValueGetValue(sizeValue as! AXValue, .cgSize, &size)
+        else { return nil }
+        return CGRect(origin: point, size: size)
+    }
+
+    private static func screen(containing axFrame: CGRect) -> NSScreen? {
+        NSScreen.screens.first { $0.frame.minX <= axFrame.midX && axFrame.midX <= $0.frame.maxX } ?? NSScreen.main
+    }
+
+    // AX coordinates are top-left-origin (screen top = y 0); AppKit screen
+    // coordinates are bottom-left-origin. Returns the window's frame
+    // translated into AppKit's space.
+    private static func appKitFrame(of axFrame: CGRect, on screen: NSScreen) -> NSRect {
+        NSRect(x: axFrame.origin.x, y: screen.frame.maxY - axFrame.origin.y - axFrame.height,
+               width: axFrame.width, height: axFrame.height)
+    }
+
+    // Positions the tag using the persisted (or default) offset from the
+    // window's top-right corner. Returns false (and hides the tag) if the
+    // window has no readable frame right now — minimized, or Accessibility
+    // not granted.
+    @discardableResult
+    private func reposition() -> Bool {
+        guard let axFrame = Self.frame(of: axWindow), let screen = Self.screen(containing: axFrame) else {
+            panel.orderOut(nil)
+            return false
+        }
+        let windowFrame = Self.appKitFrame(of: axFrame, on: screen)
+        let origin = NSPoint(
+            x: windowFrame.maxX - WindowOverlayPosition.rightInset - Self.tagSize.width,
+            y: windowFrame.maxY - WindowOverlayPosition.topInset - Self.tagSize.height)
+        panel.setFrameOrigin(origin)
+        if !panel.isVisible { panel.orderFrontRegardless() }
+        return true
+    }
+
+    // Fires for every panel move — ours (from `reposition`, when the
+    // tracked window itself moves/resizes) and the user's (dragging the
+    // tag). Either way, re-deriving the offset from the panel's actual
+    // current position and persisting it is correct: our own moves just
+    // recompute the same offset they were placed with, a no-op; a user
+    // drag captures the new spot they chose so it survives the next
+    // reposition and the next launch. Clamped to stay within the window
+    // so a sloppy drag can't wander off it entirely.
+    func windowDidMove(_ notification: Notification) {
+        guard let axFrame = Self.frame(of: axWindow), let screen = Self.screen(containing: axFrame) else { return }
+        let windowFrame = Self.appKitFrame(of: axFrame, on: screen)
+        let panelOrigin = panel.frame.origin
+        let rightInset = (windowFrame.maxX - (panelOrigin.x + Self.tagSize.width))
+            .clamped(to: 0...(max(0, windowFrame.width - Self.tagSize.width)))
+        let topInset = (windowFrame.maxY - (panelOrigin.y + Self.tagSize.height))
+            .clamped(to: 0...(max(0, windowFrame.height - Self.tagSize.height)))
+        WindowOverlayPosition.rightInset = rightInset
+        WindowOverlayPosition.topInset = topInset
+    }
+
+    // MARK: - Live tracking
+
+    private func startObserving() {
+        var newObserver: AXObserver?
+        guard AXObserverCreate(pid, WindowOverlay.axCallback, &newObserver) == .success, let newObserver
+        else { return }
+        observer = newObserver
+
+        let refcon = Unmanaged.passUnretained(self).toOpaque()
+        for name in [
+            kAXMovedNotification, kAXResizedNotification, kAXUIElementDestroyedNotification,
+            kAXWindowMiniaturizedNotification, kAXWindowDeminiaturizedNotification,
+        ] {
+            AXObserverAddNotification(newObserver, axWindow, name as CFString, refcon)
+        }
+        CFRunLoopAddSource(CFRunLoopGetCurrent(), AXObserverGetRunLoopSource(newObserver), .defaultMode)
+    }
+
+    private func stopObserving() {
+        guard let observer else { return }
+        CFRunLoopRemoveSource(CFRunLoopGetCurrent(), AXObserverGetRunLoopSource(observer), .defaultMode)
+        self.observer = nil
+    }
+
+    private static let axCallback: AXObserverCallback = { _, _, notification, refcon in
+        guard let refcon else { return }
+        let overlay = Unmanaged<WindowOverlay>.fromOpaque(refcon).takeUnretainedValue()
+        switch notification as String {
+        case kAXUIElementDestroyedNotification, kAXWindowMiniaturizedNotification:
+            overlay.panel.orderOut(nil)
+        default:
+            overlay.reposition()
+        }
+    }
+}
+
+extension Comparable {
+    func clamped(to range: ClosedRange<Self>) -> Self {
+        min(max(self, range.lowerBound), range.upperBound)
+    }
+}

Sources/main.swift

@@ -0,0 +1,10 @@
+// Entry point. Its own file only because swiftc restricts top-level
+// executable statements to a file named main.swift once a module has more
+// than one source file.
+import Cocoa
+
+let delegate = AppDelegate()
+let app = NSApplication.shared
+app.delegate = delegate
+app.setActivationPolicy(.accessory)
+app.run()

VERSION

@@ -0,0 +1 @@
+0.0.5

build.sh

@@ -0,0 +1,81 @@
+#!/usr/bin/env bash
+# Builds "shannoncoat.app" — a menu bar app (no Dock icon, no window) with a
+# custom icon (icon/AppIcon.icns — see icon/generate-icon.swift) for
+# Finder/Spotlight. It stays running in the menu bar: click the status item
+# to switch profiles, or open Manage Profiles… (Cmd+,) to add/remove one.
+# Launch at Login is a toggle inside the app itself.
+#
+# Builds into ./.build (gitignored) rather than installing straight into an
+# Applications dir — copy/drag the .app from there yourself. It's a fully
+# native, self-contained bundle — no bundled script, so copying it anywhere
+# after the build is safe.
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+SOURCES_DIR="$SCRIPT_DIR/Sources"
+VERSION_FILE="$SCRIPT_DIR/VERSION"
+ICON_SRC="$SCRIPT_DIR/icon/AppIcon.icns"
+OUT_DIR="${1:-$SCRIPT_DIR/.build}"
+APP="$OUT_DIR/shannoncoat.app"
+
+# Read from the repo's VERSION file so the .app and the script it bundles
+# never report different numbers.
+VERSION="$(cat "$VERSION_FILE" 2>/dev/null)"
+[[ -n "$VERSION" ]] || { echo "error: couldn't read $VERSION_FILE" >&2; exit 1; }
+
+mkdir -p "$OUT_DIR" "$APP/Contents/MacOS" "$APP/Contents/Resources"
+
+[[ -f "$ICON_SRC" ]] || { echo "error: $ICON_SRC missing (see icon/generate-icon.swift)" >&2; exit 1; }
+cp "$ICON_SRC" "$APP/Contents/Resources/AppIcon.icns"
+
+cat >"$APP/Contents/Info.plist" <<PLIST
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleName</key><string>shannoncoat</string>
+  <key>CFBundleDisplayName</key><string>shannoncoat</string>
+  <key>CFBundleIdentifier</key><string>com.local.shannoncoat</string>
+  <key>CFBundleVersion</key><string>$VERSION</string>
+  <key>CFBundleShortVersionString</key><string>$VERSION</string>
+  <key>CFBundlePackageType</key><string>APPL</string>
+  <key>CFBundleExecutable</key><string>launcher</string>
+  <key>CFBundleIconFile</key><string>AppIcon</string>
+  <key>LSUIElement</key><true/>
+  <key>NSHighResolutionCapable</key><true/>
+</dict>
+</plist>
+PLIST
+
+command -v swiftc >/dev/null || { echo "error: swiftc not found (install Xcode Command Line Tools: xcode-select --install)" >&2; exit 1; }
+
+# VERSION travels in Resources (not baked into the binary) so the About
+# panel and the update checker read the same file this script stamped into
+# Info.plist above.
+cp "$VERSION_FILE" "$APP/Contents/Resources/VERSION"
+
+# COMMIT is the short SHA the About tab appends to the version, so one dev
+# build is distinguishable from another — left empty for a real release
+# build, since the version number alone is unambiguous there. A release
+# build is one of:
+#   - SHANNONCOAT_RELEASE_BUILD set by release.yml, which already knows
+#     for certain whether it's building a tag — trusted outright rather
+#     than re-derived, since `git describe` needs full tag refs that a
+#     CI runner's shallow checkout isn't guaranteed to have fetched.
+#   - a local/manual build with HEAD sitting exactly on a tag (checked
+#     via `git describe`, which is reliable here since a normal
+#     non-shallow local clone has its full tag history).
+GIT_SHA=""
+if [[ -n "${SHANNONCOAT_RELEASE_BUILD:-}" ]]; then
+  : # release build — leave GIT_SHA empty
+elif git -C "$SCRIPT_DIR" rev-parse --git-dir >/dev/null 2>&1 \
+    && ! git -C "$SCRIPT_DIR" describe --tags --exact-match >/dev/null 2>&1; then
+  GIT_SHA="$(git -C "$SCRIPT_DIR" rev-parse --short HEAD 2>/dev/null || true)"
+fi
+printf '%s' "$GIT_SHA" >"$APP/Contents/Resources/COMMIT"
+
+swiftc -O "$SOURCES_DIR"/*.swift -o "$APP/Contents/MacOS/launcher"
+
+touch "$APP"
+echo "Built: $APP"
+echo "Copy it to /Applications (or ~/Applications) to install."

icon/generate-icon.swift

@@ -0,0 +1,115 @@
+// Generates a placeholder AppIcon.iconset — a plain rounded-square
+// background with the coat glyph on top. Deliberately not derived from
+// Claude's own icon assets (unlike the old version of this file, which
+// composited on top of Claude.app's icon) — this is a stand-in until a
+// real icon is designed, so it draws everything itself from vector shapes.
+//
+// Usage:
+//   swift icon/generate-icon.swift icon/AppIcon.iconset
+//   iconutil -c icns icon/AppIcon.iconset -o icon/AppIcon.icns
+//   rm -rf icon/AppIcon.iconset
+import Cocoa
+
+// Renders at exact pixel dimensions via an explicit NSBitmapImageRep rather
+// than NSImage.lockFocus() — lockFocus rasterizes at the *main screen's*
+// backing scale factor, which would silently double every size on a Retina
+// display instead of producing the exact px asked for.
+func renderIcon(pixels: Int) -> Data {
+    let s = CGFloat(pixels)
+    guard let rep = NSBitmapImageRep(
+        bitmapDataPlanes: nil,
+        pixelsWide: pixels,
+        pixelsHigh: pixels,
+        bitsPerSample: 8,
+        samplesPerPixel: 4,
+        hasAlpha: true,
+        isPlanar: false,
+        colorSpaceName: .deviceRGB,
+        bytesPerRow: 0,
+        bitsPerPixel: 0
+    ) else { fatalError("could not create bitmap rep") }
+    rep.size = NSSize(width: s, height: s)
+
+    NSGraphicsContext.saveGraphicsState()
+    let ctx = NSGraphicsContext(bitmapImageRep: rep)
+    NSGraphicsContext.current = ctx
+    ctx?.imageInterpolation = .high
+
+    // Base: a plain rounded-square background (macOS "squircle"-ish corner
+    // radius), a neutral slate color — no borrowed assets.
+    let bg = NSColor(calibratedRed: 0.30, green: 0.32, blue: 0.36, alpha: 1.0)
+    let bgPath = NSBezierPath(roundedRect: NSRect(x: 0, y: 0, width: s, height: s),
+                               xRadius: s * 0.22, yRadius: s * 0.22)
+    bg.setFill()
+    bgPath.fill()
+
+    // Foreground: the same coat glyph as before — an original shape, not
+    // derived from any borrowed icon.
+    let coat = NSColor(calibratedRed: 0.62, green: 0.44, blue: 0.24, alpha: 1.0)
+    let coatShadow = NSColor(calibratedRed: 0.48, green: 0.33, blue: 0.16, alpha: 1.0)
+    let midX = s * 0.5
+    let topY = s * 0.62
+    let collarOutX = s * 0.34
+    let collarInX = s * 0.11
+    let shoulderY = s * 0.53
+    let waistY = s * 0.30
+    let waistHalf = s * 0.30
+    let hemY = s * 0.06
+    let hemHalf = s * 0.40
+
+    let path = NSBezierPath()
+    path.move(to: NSPoint(x: midX, y: topY))
+    path.line(to: NSPoint(x: midX - collarOutX, y: shoulderY))
+    path.line(to: NSPoint(x: midX - collarInX, y: shoulderY - s * 0.07))
+    path.line(to: NSPoint(x: midX - waistHalf, y: waistY))
+    path.line(to: NSPoint(x: midX - hemHalf, y: hemY))
+    path.line(to: NSPoint(x: midX + hemHalf, y: hemY))
+    path.line(to: NSPoint(x: midX + waistHalf, y: waistY))
+    path.line(to: NSPoint(x: midX + collarInX, y: shoulderY - s * 0.07))
+    path.line(to: NSPoint(x: midX + collarOutX, y: shoulderY))
+    path.close()
+    coat.setFill()
+    path.fill()
+
+    // A thin darker strip down the centerline reads as the coat's front
+    // seam/placket, breaking up the flat fill at larger sizes.
+    let seam = NSBezierPath()
+    seam.move(to: NSPoint(x: midX, y: topY))
+    seam.line(to: NSPoint(x: midX, y: hemY))
+    seam.lineWidth = max(s * 0.012, 1)
+    coatShadow.setStroke()
+    seam.stroke()
+
+    let buttonRadius = max(s * 0.02, 0.75)
+    for t: CGFloat in [0.20, 0.42, 0.64] {
+        let y = hemY + (shoulderY - hemY) * t
+        let r = NSRect(x: midX - buttonRadius, y: y - buttonRadius, width: buttonRadius * 2, height: buttonRadius * 2)
+        coatShadow.setFill()
+        NSBezierPath(ovalIn: r).fill()
+    }
+
+    ctx?.flushGraphics()
+    NSGraphicsContext.restoreGraphicsState()
+
+    guard let png = rep.representation(using: .png, properties: [:]) else {
+        fatalError("failed to encode PNG at \(pixels)px")
+    }
+    return png
+}
+
+let sizes: [(name: String, px: Int)] = [
+    ("icon_16x16", 16), ("icon_16x16@2x", 32),
+    ("icon_32x32", 32), ("icon_32x32@2x", 64),
+    ("icon_128x128", 128), ("icon_128x128@2x", 256),
+    ("icon_256x256", 256), ("icon_256x256@2x", 512),
+    ("icon_512x512", 512), ("icon_512x512@2x", 1024),
+]
+
+let outDir = CommandLine.arguments.count > 1 ? CommandLine.arguments[1] : "AppIcon.iconset"
+try? FileManager.default.createDirectory(atPath: outDir, withIntermediateDirectories: true)
+for (name, px) in sizes {
+    let data = renderIcon(pixels: px)
+    let path = "\(outDir)/\(name).png"
+    try? data.write(to: URL(fileURLWithPath: path))
+    print("wrote \(path)")
+}

shannoncoat.sh

@@ -1,182 +0,0 @@
-#!/usr/bin/env bash
-# shannoncoat - run more than one claude desktop profile on mac.
-#
-# claude desktop app seems to keep everything important in one config directory,
-# so a different --user-data-dir gives a practically separate install.
-# and CLAUDE_CONFIG_DIR env var can isolate claude code sessions natively.
-# this script combines these to isolate both desktop sessions and the claude
-# code sessions they run.
-#
-# profiles are yaml files in ~/.shannoncoat:
-#   # ~/.shannoncoat/client1.yaml -> profile named "client1"
-#   paths:
-#     code: ~/work/client1/.claude/code
-#     desktop: ~/work/client1/.claude/desktop
-#
-# claude code inside the desktop app can run in some folder which already
-# defines a CLAUDE_CONFIG_DIR with direnv etc, that variable can be defined
-# this way to allow both individual and desktop sessions work properly:
-#   export CLAUDE_CONFIG_DIR="${CLAUDE_CONFIG_DIR:-$HOME/.claude}"
-#
-
-set -euo pipefail
-
-APP="${CLAUDE_APP_PATH:-/Applications/Claude.app}"
-BIN="$APP/Contents/MacOS/Claude"
-ROOT="$HOME/.shannoncoat"
-DEFAULT="default"
-APP_DIR=""
-CODE_DIR=""
-CODE_KEY="code"
-DESKTOP_KEY="desktop"
-
-show_usage() {
-  cat <<EOF
-Usage: $0 <command> [profile]
-
-  launch <profile>   open a profile, leaving others running
-  switch <profile>   quit all other profiles, then open this one
-  quit <profile>     quit a profile
-  list               list all running profiles
-
-Profiles are yaml files in ~/.shannoncoat/. Syntax:
-  # profile-name.yaml
-  paths:
-    $CODE_KEY: ~/path/to/claude/code
-    $DESKTOP_KEY: ~/path/to/claude/desktop
-EOF
-}
-
-# expand leading ~ in path string to $HOME
-tilde_path() {
-  local p="$1"
-  echo "${p/#\~/$HOME}"
-}
-
-# pull one key out of the yaml, simple job avoid yq for now
-read_key() {
-  local file="$1" key="$2"
-  sed -EHn "s/^\s+$key:\s+//p" "$file" | tr -d '"'
-}
-
-# set APP_DIR and CODE_DIR for a profile, or keep empty for $DEFAULT
-get_dirs() {
-  local name="$1" file="$ROOT/$1.yaml"
-
-  [[ "$name" == "$DEFAULT" ]] && { return; }
-  if [[ ! -f "$file" ]]; then
-    echo "no profile named $name (expected $file)" >&2
-    exit 1
-  fi
-  APP_DIR="$(tilde_path "$(read_key "$file" $DESKTOP_KEY)")"
-  CODE_DIR="$(tilde_path "$(read_key "$file" $CODE_KEY)")"
-}
-
-# match a claude data dir to its profile name
-dir_to_profile() {
-  local dir="$1" file name
-  [[ "$dir" == "$DEFAULT" ]] && { echo "$DEFAULT"; return; }
-  for file in "$ROOT"/*.yaml; do
-    [[ -f "$file" ]] || continue
-    name="$(basename "$file" .yaml)"
-    if [[ "$(tilde_path "$(read_key "$file" $DESKTOP_KEY)")" == "$dir" ]]; then
-      echo "$name"
-      return
-    fi
-  done
-  echo "$dir"
-}
-
-# get all running claude processes as "pid<TAB>user-data-dir"
-running_info() {
-  local pid args dir
-  while read -r pid args; do
-    # if args has --user-data-dir=, extract it, otherwise use $DEFAULT
-    if [[ "$args" == *--user-data-dir=* ]]; then
-      dir="${args#*--user-data-dir=}"
-      dir="${dir%% *}"
-    else
-      dir="$DEFAULT"
-    fi
-    printf '%s\t%s\n' "$pid" "$dir"
-  done < <(pgrep -fl "$BIN" || true)
-}
-
-# get pid of a profile's claude process
-profile_to_pid() {
-  get_dirs "$1"
-  running_info | awk -F'\t' -v d="${APP_DIR:-default}" '$2 == d { print $1; exit }'
-}
-
-# switch focus to a process window, shell/term needs accessibility permissions
-app_focus() {
-  local pid="$1"
-  osascript > /dev/null 2>&1 <<EOF || true
-tell application "System Events"
-  set proc to first process whose unix id is $pid
-  set frontmost of proc to true
-  try
-    perform action "AXRaise" of window 1 of proc
-  end try
-end tell
-EOF
-}
-
-# start a claude desktop process with the right env vars and user-data-dir
-app_start() {
-  get_dirs "$1"
-  # app dir empty means default profile, just open normally
-  [[ -z "$APP_DIR" ]] && { open -a "$APP"; return; }
-  mkdir -p "$APP_DIR" "$CODE_DIR"
-  CLAUDE_CONFIG_DIR="$CODE_DIR" "$BIN" --user-data-dir="$APP_DIR" > /dev/null 2>&1 &
-  disown
-}
-
-# list all running profiles
-cmd_list() {
-  local pid dir
-  while read -r pid dir; do
-    printf 'profile: %s\tpid: %s\n' "$(dir_to_profile "$dir")" "$pid"
-  done < <(running_info)
-}
-
-# launch a profile or focus window if already running
-cmd_launch() {
-  local name="${1:?profile name required}" pid
-  pid="$(profile_to_pid "$name")"
-  [[ -n "$pid" ]] && { app_focus "$pid"; return; }
-  app_start "$name"
-}
-
-# switch to a profile quitting all others
-cmd_switch() {
-  local name="${1:?profile name required}" pid dir keep
-  # marks which profile to keep running, "default" if empty
-  get_dirs "$name"
-  keep="${APP_DIR:-"$DEFAULT"}"
-  # quit all other running claudes except the one to $keep
-  while read -r pid dir; do
-    [[ "$dir" == "$keep" ]] && continue
-    kill "$pid" 2>/dev/null || true
-  done < <(running_info)
-  # then launch selected profile
-  cmd_launch "$name"
-}
-
-# quit a profile if running
-cmd_quit() {
-  local name="${1:?profile name required}" pid
-  pid="$(profile_to_pid "$name")"
-  [[ -z "$pid" ]] && { echo "$name isn't running"; return; }
-  kill "$pid"
-}
-
-# main entry point
-case "${1:-}" in
-  launch)    cmd_launch "${2:-}" ;;
-  switch)    cmd_switch "${2:-}" ;;
-  quit)      cmd_quit   "${2:-}" ;;
-  list)      cmd_list ;;
-  -h|--help) show_usage; exit 0 ;;
-  *)         show_usage; exit 1 ;;
-esac