diff --git a/app/existing/[repoUrl]/repo-scan-client.tsx b/app/existing/[repoUrl]/repo-scan-client.tsx
index e66989e..5a22947 100644
--- a/app/existing/[repoUrl]/repo-scan-client.tsx
+++ b/app/existing/[repoUrl]/repo-scan-client.tsx
@@ -14,6 +14,8 @@ import { generateFromRepoScan } from "@/lib/scan-generate"
 import FinalOutputView from "@/components/final-output-view"
 import RepoScanLoader from "@/components/repo-scan-loader"
 import type { GeneratedFileResult } from "@/types/output"
+import { track } from "@/lib/mixpanel"
+import { ANALYTICS_EVENTS } from "@/lib/analytics-events"
 
 const buildQuery = (url: string) => `/api/scan-repo?url=${encodeURIComponent(url)}`
 const CONVENTIONS_DOC_URL =
@@ -110,23 +112,27 @@ export default function RepoScanClient({ initialRepoUrl }: RepoScanClientProps)
         }))
     }, [scanResult])
 
-    const handleStartScan = () => {
-        if (!repoUrlForScan) {
-            return
-        }
-
-        setHasConfirmed(true)
-        setScanToken((token) => token + 1)
+  const handleStartScan = () => {
+    if (!repoUrlForScan) {
+      return
     }
 
-    const handleRetryScan = () => {
-        if (!repoUrlForScan) {
-            return
-        }
+    setHasConfirmed(true)
+    setScanToken((token) => token + 1)
+
+    track(ANALYTICS_EVENTS.REPO_SCAN_START, { repo: repoUrlForScan })
+  }
 
-        setScanToken((token) => token + 1)
+  const handleRetryScan = () => {
+    if (!repoUrlForScan) {
+      return
     }
 
+    setScanToken((token) => token + 1)
+
+    track(ANALYTICS_EVENTS.REPO_SCAN_RETRY, { repo: repoUrlForScan })
+  }
+
     const warnings = scanResult?.warnings ?? []
     const stackMeta = scanResult?.conventions ?? null
     const detectedStackId = stackMeta?.stack ?? null
diff --git a/app/existing/existing-repo-entry-client.tsx b/app/existing/existing-repo-entry-client.tsx
index ec785ca..a149990 100644
--- a/app/existing/existing-repo-entry-client.tsx
+++ b/app/existing/existing-repo-entry-client.tsx
@@ -8,6 +8,8 @@ import { Button } from "@/components/ui/button"
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card"
 import { Input } from "@/components/ui/input"
 import { normalizeGitHubRepoInput } from "@/lib/github"
+import { track } from "@/lib/mixpanel"
+import { ANALYTICS_EVENTS } from "@/lib/analytics-events"
 
 export function ExistingRepoEntryClient() {
   const router = useRouter()
@@ -30,6 +32,11 @@ export function ExistingRepoEntryClient() {
 
     const encoded = encodeURIComponent(normalized)
 
+    track(ANALYTICS_EVENTS.REPO_ANALYZE_SUBMIT, {
+      inputProvided: value.length > 0,
+      url: normalized,
+    })
+
     router.push(`/existing/${encoded}`)
   }
 
diff --git a/app/new/stack/stack-summary-page.tsx b/app/new/stack/stack-summary-page.tsx
index 80ab27c..f5eb0f1 100644
--- a/app/new/stack/stack-summary-page.tsx
+++ b/app/new/stack/stack-summary-page.tsx
@@ -26,6 +26,8 @@ import type {
 } from "@/types/wizard"
 import type { GeneratedFileResult } from "@/types/output"
 import { WizardEditAnswerDialog } from "@/components/wizard-edit-answer-dialog"
+import { track } from "@/lib/mixpanel"
+import { ANALYTICS_EVENTS } from "@/lib/analytics-events"
 
 const fileOptions = getFileOptions()
 const fileSummaryQuestion = getFileSummaryQuestion()
@@ -210,6 +212,7 @@ export function StackSummaryPage({ stackId, mode }: StackSummaryPageProps) {
   }, [wizardSteps])
 
   const handleEditClick = (questionId: string) => {
+    track(ANALYTICS_EVENTS.SUMMARY_EDIT_OPEN, { questionId })
     setEditingQuestionId(questionId)
   }
 
@@ -226,6 +229,7 @@ export function StackSummaryPage({ stackId, mode }: StackSummaryPageProps) {
       const trimmed = submittedValue.trim()
       const nextFreeText: FreeTextResponses = (() => {
         if (trimmed.length === 0) {
+          track(ANALYTICS_EVENTS.SUMMARY_EDIT_FREE_TEXT_CLEARED, { questionId: question.id })
           if (!(question.id in freeTextResponses)) {
             return { ...freeTextResponses }
           }
@@ -235,6 +239,10 @@ export function StackSummaryPage({ stackId, mode }: StackSummaryPageProps) {
           return next
         }
 
+        track(ANALYTICS_EVENTS.SUMMARY_EDIT_FREE_TEXT_SAVED, {
+          questionId: question.id,
+          length: trimmed.length,
+        })
         return {
           ...freeTextResponses,
           [question.id]: trimmed,
@@ -314,6 +322,13 @@ export function StackSummaryPage({ stackId, mode }: StackSummaryPageProps) {
         })
       }
 
+      track(ANALYTICS_EVENTS.SUMMARY_EDIT_ANSWER_SELECTED, {
+        questionId: question.id,
+        answerValue: answer.value,
+        answerLabel: answer.label,
+        allowMultiple: question.allowMultiple ?? false,
+      })
+
       if (!question.allowMultiple) {
         handleCloseEdit()
       }
diff --git a/components/instructions-wizard.tsx b/components/instructions-wizard.tsx
index 6952470..e8ea2f3 100644
--- a/components/instructions-wizard.tsx
+++ b/components/instructions-wizard.tsx
@@ -28,6 +28,8 @@ import {
 import { persistWizardState, clearWizardState } from "@/lib/wizard-storage"
 import { WizardAnswerGrid } from "./wizard-answer-grid"
 import { WizardConfirmationDialog } from "./wizard-confirmation-dialog"
+import { track } from "@/lib/mixpanel"
+import { ANALYTICS_EVENTS } from "@/lib/analytics-events"
 
 const suffixSteps = getSuffixSteps()
 const buildStepSignature = (step: WizardStep) => `${step.id}::${step.questions.map((question) => question.id).join("|")}`
@@ -559,6 +561,16 @@ export function InstructionsWizard({
       return
     }
 
+    // Track answer selection
+    track(ANALYTICS_EVENTS.WIZARD_ANSWER_SELECTED, {
+      questionId: currentQuestion.id,
+      answerValue: answer.value,
+      answerLabel: answer.label,
+      allowMultiple: currentQuestion.allowMultiple ?? false,
+      isDefault: Boolean(answer.isDefault),
+      stepId: currentStep?.id ?? null,
+    })
+
     void handleQuestionAnswerSelection(currentQuestion, answer)
   }
 
@@ -704,6 +716,11 @@ export function InstructionsWizard({
       return
     }
 
+    track(ANALYTICS_EVENTS.WIZARD_FREE_TEXT_SAVED, {
+      questionId: currentQuestion.id,
+      length: currentFreeTextValue.trim().length,
+    })
+
     commitFreeTextValue(currentQuestion, currentFreeTextValue)
   }
 
@@ -712,6 +729,10 @@ export function InstructionsWizard({
       return
     }
 
+    track(ANALYTICS_EVENTS.WIZARD_FREE_TEXT_CLEARED, {
+      questionId: currentQuestion.id,
+    })
+
     commitFreeTextValue(currentQuestion, "", { allowAutoAdvance: false })
   }
 
@@ -733,6 +754,14 @@ export function InstructionsWizard({
 
     const isStackQuestion = currentQuestion.id === STACK_QUESTION_ID
 
+    // Track default use
+    track(ANALYTICS_EVENTS.WIZARD_USE_DEFAULT, {
+      questionId: currentQuestion.id,
+      answerValue: defaultAnswer.value,
+      answerLabel: defaultAnswer.label,
+      isStackQuestion,
+    })
+
     if (isStackQuestion) {
       await loadStackQuestions(defaultAnswer.value, defaultAnswer.label, {
         skipFastTrackPrompt: autoStartAfterStackSelection,
@@ -769,6 +798,7 @@ export function InstructionsWizard({
   }
 
   const requestResetWizard = () => {
+    track(ANALYTICS_EVENTS.WIZARD_RESET)
     setPendingConfirmation("reset")
   }
 
diff --git a/lib/analytics-events.ts b/lib/analytics-events.ts
index b9f69d3..61fe905 100644
--- a/lib/analytics-events.ts
+++ b/lib/analytics-events.ts
@@ -1,6 +1,22 @@
 export const ANALYTICS_EVENTS = {
   PAGE_VIEW: "Page View",
   CREATE_INSTRUCTIONS_FILE: "Create My Instructions File",
+  // Wizard interactions
+  WIZARD_ANSWER_SELECTED: "Wizard Answer Selected",
+  WIZARD_USE_DEFAULT: "Wizard Use Default",
+  WIZARD_FREE_TEXT_SAVED: "Wizard Free Text Saved",
+  WIZARD_FREE_TEXT_CLEARED: "Wizard Free Text Cleared",
+  WIZARD_RESET: "Wizard Reset",
+  // Summary dialog interactions
+  SUMMARY_EDIT_OPEN: "Summary Edit Open",
+  SUMMARY_EDIT_ANSWER_SELECTED: "Summary Edit Answer Selected",
+  SUMMARY_EDIT_FREE_TEXT_SAVED: "Summary Edit Free Text Saved",
+  SUMMARY_EDIT_FREE_TEXT_CLEARED: "Summary Edit Free Text Cleared",
+  // Existing repo / scan interactions
+  REPO_ANALYZE_SUBMIT: "Existing Repo Analyze Submit",
+  REPO_SCAN_START: "Repo Scan Start",
+  REPO_SCAN_RETRY: "Repo Scan Retry",
+  REPO_SCAN_GENERATE_FILE: "Repo Scan Generate File",
 } as const
 
 export type AnalyticsEvent =
diff --git a/lib/scan-generate.ts b/lib/scan-generate.ts
index e89d3e9..1750ffc 100644
--- a/lib/scan-generate.ts
+++ b/lib/scan-generate.ts
@@ -4,6 +4,8 @@ import { getFileOptions } from "@/lib/wizard-config"
 import { getMimeTypeForFormat } from "@/lib/wizard-utils"
 import type { RepoScanSummary } from "@/types/repo-scan"
 import type { GeneratedFileResult } from "@/types/output"
+import { track } from "@/lib/mixpanel"
+import { ANALYTICS_EVENTS } from "@/lib/analytics-events"
 
 const fileOptions = getFileOptions()
 
@@ -15,6 +17,12 @@ export async function generateFromRepoScan(
 ): Promise<GeneratedFileResult | null> {
   const selected = fileOptions.find((f) => f.id === outputFileId) || null
 
+  track(ANALYTICS_EVENTS.REPO_SCAN_GENERATE_FILE, {
+    outputFile: outputFileId,
+    stack: scan.conventions?.stack ?? null,
+    language: scan.language ?? null,
+  })
+
   const res = await fetch(`/api/scan-generate/${encodeURIComponent(outputFileId)}`, {
     method: "POST",
     headers: {