diff --git a/bugbait/eslint.config.mjs b/bugbait/eslint.config.mjs
new file mode 100644
index 0000000..cc63788
--- /dev/null
+++ b/bugbait/eslint.config.mjs
@@ -0,0 +1,21 @@
+import { dirname } from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { FlatCompat } from '@eslint/eslintrc'
+
+/*
+ * Same shape as `traces/eslint.config.mjs`, and for the same reason: `eslint-config-next@15.5`
+ * still ships eslintrc-format objects, so `compat.extends()` is the only form that resolves,
+ * and `next lint` with no config on disk drops into an interactive prompt rather than linting.
+ */
+const compat = new FlatCompat({
+  baseDirectory: dirname(fileURLToPath(import.meta.url)),
+})
+
+const eslintConfig = [
+  {
+    ignores: ['.next/**', 'out/**', 'node_modules/**', 'public/**', 'next-env.d.ts'],
+  },
+  ...compat.extends('next/core-web-vitals', 'next/typescript'),
+]
+
+export default eslintConfig
diff --git a/bugbait/package-lock.json b/bugbait/package-lock.json
index 24bbe6d..019726d 100644
--- a/bugbait/package-lock.json
+++ b/bugbait/package-lock.json
@@ -16,6 +16,7 @@
         "rrweb": "2.0.0-alpha.18"
       },
       "devDependencies": {
+        "@eslint/eslintrc": "^3.3.6",
         "@types/node": "^22.0.0",
         "@types/react": "^19.0.0",
         "@types/react-dom": "^19.0.0",
diff --git a/bugbait/package.json b/bugbait/package.json
index ecb1bb0..0d56a96 100644
--- a/bugbait/package.json
+++ b/bugbait/package.json
@@ -8,7 +8,7 @@
     "dev": "next dev --port 3001",
     "build": "next build",
     "start": "next start --port 3001",
-    "lint": "next lint",
+    "lint": "eslint . --max-warnings=0",
     "typecheck": "tsc --noEmit",
     "record:fixtures": "node scripts/record-fixtures.mjs"
   },
@@ -20,6 +20,7 @@
     "rrweb": "2.0.0-alpha.18"
   },
   "devDependencies": {
+    "@eslint/eslintrc": "^3.3.6",
     "@types/node": "^22.0.0",
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
diff --git a/traces/eslint.config.mjs b/traces/eslint.config.mjs
new file mode 100644
index 0000000..4a76786
--- /dev/null
+++ b/traces/eslint.config.mjs
@@ -0,0 +1,25 @@
+import { dirname } from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { FlatCompat } from '@eslint/eslintrc'
+
+/*
+ * Flat config, driven through `FlatCompat`, because `eslint-config-next@15.5` still ships
+ * eslintrc-format objects — `core-web-vitals.js` is a bare `module.exports = { extends: [...] }`,
+ * not a flat array. Next 16 adds real flat exports you can spread directly; until this project
+ * moves, `compat.extends()` is the only form that resolves.
+ *
+ * This file exists because `next lint` is gone in Next 16 and already deprecated here: with no
+ * config on disk it drops into an interactive "how would you like to configure ESLint?" prompt,
+ * so `npm run lint` in a clean clone never returns a lint result at all. The script now calls
+ * `eslint .` directly.
+ */
+const compat = new FlatCompat({
+  baseDirectory: dirname(fileURLToPath(import.meta.url)),
+})
+
+export default [
+  {
+    ignores: ['.next/**', 'out/**', 'node_modules/**', 'public/**'],
+  },
+  ...compat.extends('next/core-web-vitals', 'next/typescript'),
+]
diff --git a/traces/package-lock.json b/traces/package-lock.json
index 3accc5e..d7eb8c9 100644
--- a/traces/package-lock.json
+++ b/traces/package-lock.json
@@ -18,6 +18,7 @@
         "zustand": "^5.0.0"
       },
       "devDependencies": {
+        "@eslint/eslintrc": "^3.3.6",
         "@types/node": "^22.0.0",
         "@types/react": "^19.0.0",
         "@types/react-dom": "^19.0.0",
diff --git a/traces/package.json b/traces/package.json
index 6c2019e..8908f27 100644
--- a/traces/package.json
+++ b/traces/package.json
@@ -8,7 +8,7 @@
     "dev": "next dev",
     "build": "next build",
     "start": "next start",
-    "lint": "next lint",
+    "lint": "eslint . --ignore-pattern next-env.d.ts",
     "typecheck": "tsc --noEmit",
     "test": "vitest run",
     "test:watch": "vitest"
@@ -23,6 +23,7 @@
     "zustand": "^5.0.0"
   },
   "devDependencies": {
+    "@eslint/eslintrc": "^3.3.6",
     "@types/node": "^22.0.0",
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
diff --git a/traces/src/components/timeline/timeline.tsx b/traces/src/components/timeline/timeline.tsx
index 600bb77..a75a27b 100644
--- a/traces/src/components/timeline/timeline.tsx
+++ b/traces/src/components/timeline/timeline.tsx
@@ -123,7 +123,7 @@ export function Timeline() {
             Nothing on this timeline yet — no recording is loaded.
           </span>
           <span className="mt-0.5 text-meta text-faint">
-            Load a sample from the list above. Your marks and the agent's findings will then share this
+            Load a sample from the list above. Your marks and the agent&apos;s findings will then share this
             axis, labelled by who found them.
           </span>
         </p>