diff --git a/app/api/scan-repo/route.ts b/app/api/scan-repo/route.ts
index 2b7d18d..b21b4ac 100644
--- a/app/api/scan-repo/route.ts
+++ b/app/api/scan-repo/route.ts
@@ -5,11 +5,14 @@ import type {
     RepoScanResponse,
     RepoScanSummary,
     RepoStructureSummary,
+    GitHubTreeItem,
+    PackageJson,
 } from "@/types/repo-scan"
 import { buildDependencyAnalysisTasks, hasDependencyDetectionRules } from "@/lib/stack-detection"
 import type { DependencyAnalysisTask } from "@/lib/stack-detection"
-import { loadStackQuestionMetadata, normalizeConventionValue } from "@/lib/question-metadata"
 import { loadStackConventions } from "@/lib/conventions"
+import { dependencyHas } from "@/lib/repo-scan/dependency-utils"
+import { detectPythonTestingSignals } from "@/lib/repo-scan/python-testing-signals"
 import { inferStackFromScan } from "@/lib/scan-to-wizard"
 import { stackQuestion } from "@/lib/wizard-config"
 
@@ -20,33 +23,6 @@ const JSON_HEADERS = {
     Accept: "application/vnd.github+json",
 }
 
-interface GitHubTreeItem {
-    path: string
-    type: "blob" | "tree" | string
-}
-
-interface PackageJson {
-    dependencies?: Record<string, string>
-    devDependencies?: Record<string, string>
-    peerDependencies?: Record<string, string>
-    optionalDependencies?: Record<string, string>
-    engines?: { node?: string }
-    workspaces?: string[] | { packages?: string[] }
-}
-
-const dependencyHas = (pkg: PackageJson, names: string[]): boolean => {
-    const sources = [
-        pkg.dependencies,
-        pkg.devDependencies,
-        pkg.peerDependencies,
-        pkg.optionalDependencies,
-    ]
-
-    return sources.some((source) =>
-        source ? names.some((name) => Object.prototype.hasOwnProperty.call(source, name)) : false,
-    )
-}
-
 const isNullishOrEmpty = (value: unknown): value is null | undefined | "" => value === null || value === undefined || value === ""
 
 const extractRateLimitRemaining = (response: Response): number | null => {
@@ -292,79 +268,6 @@ const detectTooling = async (
     }
 }
 
-type TestingConventionValues = {
-    unit: string[]
-    e2e: string[]
-}
-
-const testingConventionCache = new Map<string, TestingConventionValues>()
-
-const getTestingConventionValues = async (stackId: string): Promise<TestingConventionValues> => {
-    const normalized = stackId.trim().toLowerCase()
-    if (testingConventionCache.has(normalized)) {
-        return testingConventionCache.get(normalized)!
-    }
-
-    const metadata = await loadStackQuestionMetadata(normalized)
-    const values: TestingConventionValues = {
-        unit: metadata.answersByResponseKey.testingUT ?? [],
-        e2e: metadata.answersByResponseKey.testingE2E ?? [],
-    }
-    testingConventionCache.set(normalized, values)
-    return values
-}
-
-const findConventionValue = (values: string[], target: string): string | null => {
-    const normalizedTarget = normalizeConventionValue(target)
-    return values.find((value) => normalizeConventionValue(value) === normalizedTarget) ?? null
-}
-
-const BEHAVE_DEPENDENCIES = ["behave", "behave-django", "behave-webdriver"]
-
-export const detectPythonTestingSignals = async (
-    paths: string[],
-    pkg: PackageJson | null,
-    testing: Set<string>,
-): Promise<void> => {
-    const { unit } = await getTestingConventionValues("python")
-    if (unit.length === 0) {
-        return
-    }
-
-    const behaveValue = findConventionValue(unit, "behave")
-    const unittestValue = findConventionValue(unit, "unittest")
-
-    if (!behaveValue && !unittestValue) {
-        return
-    }
-
-    const lowerCasePaths = paths.map((path) => path.toLowerCase())
-
-    if (behaveValue) {
-        const hasFeaturesDir = lowerCasePaths.some((path) => path.startsWith("features/") || path.includes("/features/"))
-        const hasStepsDir = lowerCasePaths.some((path) => path.includes("/steps/"))
-        const hasEnvironment = lowerCasePaths.some((path) => path.endsWith("/environment.py") || path.endsWith("environment.py"))
-        const hasDependency = pkg ? dependencyHas(pkg, BEHAVE_DEPENDENCIES) : false
-
-        if (hasDependency || (hasFeaturesDir && (hasStepsDir || hasEnvironment))) {
-            testing.add(behaveValue)
-        }
-    }
-
-    if (unittestValue) {
-        const hasUnitFiles = lowerCasePaths.some((path) => {
-            if (!/(^|\/)(tests?|testcases|specs)\//.test(path)) {
-                return false
-            }
-            return /(^|\/)(test_[^/]+|[^/]+_test)\.py$/.test(path)
-        })
-
-        if (hasUnitFiles) {
-            testing.add(unittestValue)
-        }
-    }
-}
-
 const readPackageJson = async (
     owner: string,
     repo: string,
diff --git a/app/layout.tsx b/app/layout.tsx
index a5ceef7..8d2ef7b 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -1,22 +1,11 @@
 import type { Metadata } from "next";
 import { Suspense } from "react";
 import Script from "next/script";
-import { Geist, Geist_Mono } from "next/font/google";
 import "./globals.css";
 import { ThemeProvider } from "@/components/theme-provider";
 import { MixpanelInit } from "@/components/MixpanelInit";
 import { SITE_URL } from "@/lib/site-metadata";
 
-const geistSans = Geist({
-  variable: "--font-geist-sans",
-  subsets: ["latin"],
-});
-
-const geistMono = Geist_Mono({
-  variable: "--font-geist-mono",
-  subsets: ["latin"],
-});
-
 const siteUrl = SITE_URL;
 const siteTitle = "DevContext – AI Coding Guidelines & Repo Analyzer";
 const siteDescription =
@@ -155,9 +144,7 @@ export default function RootLayout({
 }>) {
   return (
     <html lang="en" suppressHydrationWarning className="dark">
-      <body
-        className={`${geistSans.variable} ${geistMono.variable} antialiased`}
-      >
+      <body className="antialiased font-sans">
         <Script
           id="structured-data"
           type="application/ld+json"
diff --git a/lib/__tests__/repo-scan-python-detection.test.ts b/lib/__tests__/repo-scan-python-detection.test.ts
index 149be09..39f45f2 100644
--- a/lib/__tests__/repo-scan-python-detection.test.ts
+++ b/lib/__tests__/repo-scan-python-detection.test.ts
@@ -1,13 +1,7 @@
 import { describe, expect, it } from "vitest"
 
-import { detectPythonTestingSignals } from "@/app/api/scan-repo/route"
-
-type PackageJson = {
-  dependencies?: Record<string, string>
-  devDependencies?: Record<string, string>
-  peerDependencies?: Record<string, string>
-  optionalDependencies?: Record<string, string>
-}
+import { detectPythonTestingSignals } from "@/lib/repo-scan/python-testing-signals"
+import type { PackageJson } from "@/types/repo-scan"
 
 const createPkg = (deps: Partial<PackageJson>): PackageJson => ({ ...deps })
 
diff --git a/lib/repo-scan/dependency-utils.ts b/lib/repo-scan/dependency-utils.ts
new file mode 100644
index 0000000..3501e40
--- /dev/null
+++ b/lib/repo-scan/dependency-utils.ts
@@ -0,0 +1,14 @@
+import type { PackageJson } from "@/types/repo-scan"
+
+export const dependencyHas = (pkg: PackageJson, names: string[]): boolean => {
+    const sources = [
+        pkg.dependencies,
+        pkg.devDependencies,
+        pkg.peerDependencies,
+        pkg.optionalDependencies,
+    ]
+
+    return sources.some((source) =>
+        source ? names.some((name) => Object.prototype.hasOwnProperty.call(source, name)) : false,
+    )
+}
diff --git a/lib/repo-scan/python-testing-signals.ts b/lib/repo-scan/python-testing-signals.ts
new file mode 100644
index 0000000..0b4f052
--- /dev/null
+++ b/lib/repo-scan/python-testing-signals.ts
@@ -0,0 +1,76 @@
+import { loadStackQuestionMetadata, normalizeConventionValue } from "@/lib/question-metadata"
+import { dependencyHas } from "@/lib/repo-scan/dependency-utils"
+import type { PackageJson } from "@/types/repo-scan"
+
+type TestingConventionValues = {
+    unit: string[]
+    e2e: string[]
+}
+
+const testingConventionCache = new Map<string, TestingConventionValues>()
+
+const getTestingConventionValues = async (stackId: string): Promise<TestingConventionValues> => {
+    const normalized = stackId.trim().toLowerCase()
+    if (testingConventionCache.has(normalized)) {
+        return testingConventionCache.get(normalized)!
+    }
+
+    const metadata = await loadStackQuestionMetadata(normalized)
+    const values: TestingConventionValues = {
+        unit: metadata.answersByResponseKey.testingUT ?? [],
+        e2e: metadata.answersByResponseKey.testingE2E ?? [],
+    }
+    testingConventionCache.set(normalized, values)
+    return values
+}
+
+const findConventionValue = (values: string[], target: string): string | null => {
+    const normalizedTarget = normalizeConventionValue(target)
+    return values.find((value) => normalizeConventionValue(value) === normalizedTarget) ?? null
+}
+
+const BEHAVE_DEPENDENCIES = ["behave", "behave-django", "behave-webdriver"]
+
+export const detectPythonTestingSignals = async (
+    paths: string[],
+    pkg: PackageJson | null,
+    testing: Set<string>,
+): Promise<void> => {
+    const { unit } = await getTestingConventionValues("python")
+    if (unit.length === 0) {
+        return
+    }
+
+    const behaveValue = findConventionValue(unit, "behave")
+    const unittestValue = findConventionValue(unit, "unittest")
+
+    if (!behaveValue && !unittestValue) {
+        return
+    }
+
+    const lowerCasePaths = paths.map((path) => path.toLowerCase())
+
+    if (behaveValue) {
+        const hasFeaturesDir = lowerCasePaths.some((path) => path.startsWith("features/") || path.includes("/features/"))
+        const hasStepsDir = lowerCasePaths.some((path) => path.includes("/steps/"))
+        const hasEnvironment = lowerCasePaths.some((path) => path.endsWith("/environment.py") || path.endsWith("environment.py"))
+        const hasDependency = pkg ? dependencyHas(pkg, BEHAVE_DEPENDENCIES) : false
+
+        if (hasDependency || (hasFeaturesDir && (hasStepsDir || hasEnvironment))) {
+            testing.add(behaveValue)
+        }
+    }
+
+    if (unittestValue) {
+        const hasUnitFiles = lowerCasePaths.some((path) => {
+            if (!/(^|\/)(tests?|testcases|specs)\//.test(path)) {
+                return false
+            }
+            return /(^|\/)(test_[^/]+|[^/]+_test)\.py$/.test(path)
+        })
+
+        if (hasUnitFiles) {
+            testing.add(unittestValue)
+        }
+    }
+}
diff --git a/package.json b/package.json
index f5f6e3e..5ed832e 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "private": true,
   "scripts": {
     "dev": "next dev --turbopack",
-    "build": "next build --turbopack",
+    "build": "next build",
     "start": "next start",
     "lint": "eslint",
     "test": "vitest",
diff --git a/types/repo-scan.ts b/types/repo-scan.ts
index 46c06e9..6da2c58 100644
--- a/types/repo-scan.ts
+++ b/types/repo-scan.ts
@@ -57,3 +57,17 @@ export type RepoScanResponse = RepoScanSummary | RepoScanErrorResponse
 export type RepoScanRouteParams = {
     repoUrl: string
 }
+
+export type GitHubTreeItem = {
+    path: string
+    type: "blob" | "tree" | string
+}
+
+export type PackageJson = {
+    dependencies?: Record<string, string>
+    devDependencies?: Record<string, string>
+    peerDependencies?: Record<string, string>
+    optionalDependencies?: Record<string, string>
+    engines?: { node?: string }
+    workspaces?: string[] | { packages?: string[] }
+}
diff --git a/types/stack-detection.ts b/types/stack-detection.ts
index b7cc4d2..c26f7f3 100644
--- a/types/stack-detection.ts
+++ b/types/stack-detection.ts
@@ -39,6 +39,10 @@ export type StackDependencyFileDetection = {
      * Explicit paths that should be evaluated (useful for root-level files).
      */
     paths?: string[]
+    /**
+     * Legacy support for single path detection.
+     */
+    path?: string
     /**
      * Signals that should be evaluated against the file contents.
      */