diff --git a/lib/cmd-fns/dev/index.ts b/lib/cmd-fns/dev/index.ts
index 16c8ae9e..63f9e79e 100644
--- a/lib/cmd-fns/dev/index.ts
+++ b/lib/cmd-fns/dev/index.ts
@@ -16,6 +16,8 @@ import { startEditEventWatcher } from "./start-edit-event-watcher"
 import { startExportRequestWatcher } from "./start-export-request-watcher"
 import { startFsWatcher } from "./start-fs-watcher"
 import { uploadExamplesFromDirectory } from "./upload-examples-from-directory"
+import posthog from "lib/posthog"
+import crypto from 'crypto'
 
 export const devCmd = async (ctx: AppContext, args: any) => {
   const params = z
@@ -27,6 +29,16 @@ export const devCmd = async (ctx: AppContext, args: any) => {
   const { port } = params
   const { cwd } = ctx
 
+  const projectHash = crypto.createHash('md5').update(cwd).digest('hex')
+
+  posthog.capture({
+    distinctId: projectHash,
+    event: 'tsci_dev_started',
+    properties: {
+      port: port,
+    }
+  })
+
   // In the future we should automatically run "tsci init" if the directory
   // isn't properly initialized, for now we're just going to do a spot check
   const isInitialized = await checkIfInitialized(ctx)
@@ -120,14 +132,32 @@ export const devCmd = async (ctx: AppContext, args: any) => {
     })
     if (action === "open-in-browser") {
       open(serverUrl)
+      posthog.capture({
+        distinctId: projectHash,
+        event: 'tsci_dev_open_browser'
+      })
     } else if (action === "open-in-vs-code") {
       await $`code ${cwd}`
+      posthog.capture({
+        distinctId: projectHash,
+        event: 'tsci_dev_open_vscode'
+      })
     } else if (!action || action === "stop") {
       if (server.stop) server.stop()
       if (server.close) server.close()
       fs_watcher.stop()
       er_watcher.stop()
       ee_watcher.stop()
+      
+      posthog.capture({
+        distinctId: projectHash,
+        event: 'tsci_dev_stopped'
+      })
+      
+      if (posthog.shutdown) {
+        await posthog.shutdown()
+      }
+      
       break
     }
   }
diff --git a/lib/posthog.ts b/lib/posthog.ts
new file mode 100644
index 00000000..4a45d4fe
--- /dev/null
+++ b/lib/posthog.ts
@@ -0,0 +1,24 @@
+import { PostHog } from 'posthog-node'
+
+const POSTHOG_API_KEY: string | undefined = process.env.POSTHOG_API_KEY
+
+let posthogInstance: PostHog | null = null
+
+if (POSTHOG_API_KEY) {
+  posthogInstance = new PostHog(
+    POSTHOG_API_KEY,
+    { host: 'https://us.i.posthog.com' }
+  )
+}
+
+const posthogProxy = new Proxy<PostHog>({} as PostHog, {
+  get(target, prop) {
+    if (posthogInstance) {
+      return Reflect.get(posthogInstance, prop)
+    }
+    // Return a no-op function for any method call if PostHog is not initialized
+    return () => {}
+  }
+})
+
+export default posthogProxy
\ No newline at end of file
diff --git a/package.json b/package.json
index a71fd369..008c899a 100644
--- a/package.json
+++ b/package.json
@@ -59,6 +59,7 @@
     "node-persist": "^4.0.1",
     "open": "^10.1.0",
     "perfect-cli": "^1.0.20",
+    "posthog-node": "^4.0.1",
     "prompts": "^2.4.2",
     "react": "^18.2.0",
     "semver": "^7.6.0",
@@ -70,16 +71,16 @@
   "peerDependencies": {
     "@tscircuit/builder": "*",
     "@tscircuit/layout": "*",
+    "@tscircuit/manual-edit-events": "*",
     "@tscircuit/react-fiber": "*",
-    "@tscircuit/soup-util": "*",
-    "@tscircuit/manual-edit-events": "*"
+    "@tscircuit/soup-util": "*"
   },
   "devDependencies": {
     "@tscircuit/builder": "*",
     "@tscircuit/layout": "^0.0.24",
+    "@tscircuit/manual-edit-events": "^0.0.4",
     "@tscircuit/react-fiber": "*",
     "@tscircuit/soup-util": "^0.0.11",
-    "@tscircuit/manual-edit-events": "^0.0.4",
     "@types/archiver": "^6.0.2",
     "@types/bun": "^1.0.8",
     "@types/chokidar": "^2.1.3",
diff --git a/tsup.config.ts b/tsup.config.ts
new file mode 100644
index 00000000..dfd48c4e
--- /dev/null
+++ b/tsup.config.ts
@@ -0,0 +1,7 @@
+import { defineConfig } from 'tsup'
+
+export default defineConfig({
+  env: {
+    POSTHOG_API_KEY: JSON.stringify(process.env.POSTHOG_API_KEY || ''),
+  },
+})
\ No newline at end of file