diff --git a/__tests__/stats.test.ts b/__tests__/stats.test.ts
index 34599df..a9d22fc 100644
--- a/__tests__/stats.test.ts
+++ b/__tests__/stats.test.ts
@@ -157,9 +157,9 @@ describe("computeStats", () => {
 
   it("resolves session slug paths to real project paths", () => {
     const stats = computeStats(richData);
-    // -home-user-project-a should resolve to /home/user/project-a
+    // -home-user-project-a should resolve to /home/user/project-a, displayed as basename
     const projectNames = stats.topProjectStats.map((p) => p.name);
-    expect(projectNames).toContain("/home/user/project-a");
+    expect(projectNames).toContain("project-a");
   });
 
   it("counts tool calls from session messages", () => {
diff --git a/src/lib/stats.ts b/src/lib/stats.ts
index d778c22..3be54e1 100644
--- a/src/lib/stats.ts
+++ b/src/lib/stats.ts
@@ -195,11 +195,13 @@ export function computeStats(data: ParsedData): ComputedStats {
   const projectSet = new Set<string>();
   const branchSet = new Set<string>();
   const projectActivity: Record<string, number> = {};
-  // Build slug→realPath from history so we can resolve session folder names
+  // Build slug→realPath from history so we can resolve session folder names.
+  // Always replace \, / and : so Windows drive letters (C:\ or C:/) slug correctly
+  // regardless of whether history.jsonl stores backslashes or forward slashes.
+  const pathToSlug = (p: string) => p.replaceAll("\\", "-").replaceAll("/", "-").replaceAll(":", "-");
   for (const entry of history) {
     if (entry.project) {
-      const slug = entry.project.replaceAll("/", "-");
-      slugToPath[slug] = entry.project;
+      slugToPath[pathToSlug(entry.project)] = entry.project;
       projectSet.add(entry.project);
     }
   }
@@ -229,11 +231,15 @@ export function computeStats(data: ParsedData): ComputedStats {
     }
   }
   const topProjectStats = Array.from(projectSet)
-    .map((name) => ({
-      name,
-      messages: projectActivity[name] || 0,
-      tokens: projectTokens[name] || 0,
-      sessions: projectSessions[name] || 0,
+    .map((fullPath) => ({
+      name:
+        fullPath
+          .split(fullPath.includes("\\") ? "\\" : "/")
+          .filter(Boolean)
+          .at(-1) ?? fullPath,
+      messages: projectActivity[fullPath] || 0,
+      tokens: projectTokens[fullPath] || 0,
+      sessions: projectSessions[fullPath] || 0,
     }))
     .sort((a, b) => b.messages - a.messages)
     .slice(0, 5);
@@ -434,15 +440,15 @@ function extractUsername(history: HistoryEntry[], sessions: { messages: { cwd?:
   for (const session of sessions) {
     for (const msg of session.messages) {
       if (msg.cwd) {
-        // /home/username/... or /Users/username/...
-        const match = msg.cwd.match(/^\/(?:home|Users)\/([^/]+)/);
+        // /home/username/... or /Users/username/... or C:\Users\username\...
+        const match = msg.cwd.match(/^(?:\/(?:home|Users)\/|[A-Za-z]:\\[Uu]sers\\)([^/\\]+)/);
         if (match) return match[1];
       }
     }
   }
   for (const entry of history) {
     if (entry.project) {
-      const match = entry.project.match(/^\/(?:home|Users)\/([^/]+)/);
+      const match = entry.project.match(/^(?:\/(?:home|Users)\/|[A-Za-z]:\\[Uu]sers\\)([^/\\]+)/);
       if (match) return match[1];
     }
   }