diff --git a/.github/workflows/generate-test-seed.yml b/.github/workflows/generate-test-seed.yml
index 1dd6d6ac..86f5edea 100644
--- a/.github/workflows/generate-test-seed.yml
+++ b/.github/workflows/generate-test-seed.yml
@@ -3,6 +3,7 @@ name: Generate Test Seed
 on:
   pull_request:
     paths:
+      - '.github/workflows/generate-test-seed.yml'
       - 'seed/seed.json'
       - 'studies/**'
 
@@ -50,19 +51,16 @@ jobs:
             await comment(github, context, commentBody)
 
       - name: Install
-        run: |
-          npm ci
+        run: npm ci
 
-      - name: Build & Test
-        run: |
-          npm run typecheck:scripts
-          npm run build:proto
-          npm run typecheck
-          npm run test
+      - name: Typecheck
+        run: npm run typecheck
 
       - name: Lint
-        run: |
-          npm run lint -- --base "$BASE_SHA"
+        run: npm run lint -- --base "$BASE_SHA"
+
+      - name: Test
+        run: npm run test
 
       - name: Generate seed
         run: |
diff --git a/.github/workflows/test-src.yml b/.github/workflows/test-src.yml
index 83681777..4e594933 100644
--- a/.github/workflows/test-src.yml
+++ b/.github/workflows/test-src.yml
@@ -7,26 +7,20 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    env:
-      BASE_SHA: '${{ github.event.pull_request.base.sha || github.event.merge_group.base_sha }}'
-
     steps:
       - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
 
-      - name: fetch base commit
-        run: git fetch --depth=1 origin "$BASE_SHA"
-
       - name: npm install
         run: npm install
 
-      - name: typecheck:scripts
-        run: npm run typecheck:scripts
+      - name: typecheck
+        run: npm run typecheck
 
-      - name: build
-        run: npm run build
+      - name: lint
+        run: npm run lint -- --all
 
       - name: run tests
         run: npm run test
 
-      - name: lint
-        run: npm run lint -- --base "$BASE_SHA"
+      - name: build
+        run: npm run build
diff --git a/.prettierignore b/.prettierignore
index d3e98286..496efcd9 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,3 +1,4 @@
 seed/seed.json
+src/proto/generated/*
 src/test/data/**/*unformatted*
 src/web/css/bootstrap.min.css
diff --git a/src/scripts/lint.ts b/src/scripts/lint.ts
index 8f2d01de..60074439 100644
--- a/src/scripts/lint.ts
+++ b/src/scripts/lint.ts
@@ -4,7 +4,7 @@
 // You can obtain one at https://mozilla.org/MPL/2.0/.
 
 import { program } from '@commander-js/extra-typings';
-import { spawnSync } from 'child_process';
+import { execSync, spawnSync } from 'child_process';
 
 // @ts-expect-error lint-staged is not typed.
 import lintStaged from 'lint-staged';
@@ -16,6 +16,7 @@ program
       'types, and runs the corresponding linters. Use this command to ensure code\n' +
       'quality before committing or pushing changes.',
   )
+  .option('-a, --all', 'lint all files in the repository')
   .option('-b, --base <value>', 'base branch to compare against')
   .option('-s, --staged', 'use staged files instead of the branch diff')
   .option('-f, --fix', 'automatically fix problems')
@@ -23,12 +24,49 @@ program
   .parse();
 
 interface Options {
+  all?: true;
   base?: string;
   staged?: true;
   fix?: true;
 }
 
 async function main(options: Options) {
+  process.exitCode = options.all
+    ? lintAllFiles(options)
+    : await lintDiffFiles(options);
+}
+
+// Returns an array of commands to lint all files.
+function getLintAllCommands(options: Options): string[] {
+  return [
+    'prettier . --ignore-unknown' + (options.fix ? ' --write' : ' --check'),
+    'eslint . --config src/.eslintrc.js' + (options.fix ? ' --fix' : ''),
+    // TODO(goodov): Add a command to lint JSON studies when per-file structure
+    // appears.
+  ];
+}
+
+// Returns a lint-staged configuration to lint modified files.
+function getLintDiffCommands(options: Options): Record<string, any> {
+  return {
+    '*': 'prettier --ignore-unknown' + (options.fix ? ' --write' : ' --check'),
+    '*.{ts,js,tsx,jsx}':
+      'eslint --config src/.eslintrc.js' + (options.fix ? ' --fix' : ''),
+    'studies/**/*.json':
+      'npm run seed_tools -- check_study' + (options.fix ? ' --fix' : ''),
+  };
+}
+
+function lintAllFiles(options: Options): number {
+  for (const command of getLintAllCommands(options)) {
+    console.log(`Running: ${command}`);
+    execSync(command, { stdio: 'inherit' });
+  }
+
+  return 0;
+}
+
+async function lintDiffFiles(options: Options): Promise<number> {
   if (options.base !== undefined && options.staged) {
     console.error('The --base and --staged options are mutually exclusive');
     process.exit(1);
@@ -40,27 +78,12 @@ async function main(options: Options) {
   const passed: boolean = await lintStaged({
     allowEmpty: false,
     concurrent: !options.fix,
-    config: createLintStagedConfig(options),
+    config: getLintDiffCommands(options),
     cwd: process.cwd(),
     diff: options.base !== undefined ? `${options.base}..HEAD` : undefined,
   });
-  process.exitCode = passed ? 0 : 1;
-}
-
-function createLintStagedConfig(options: Options): any {
-  const config: Record<string, any> = {
-    '*': 'prettier  --ignore-unknown' + (options.fix ? ' --write' : ' --check'),
-    'studies/**/*.json':
-      'npm run seed_tools -- check_study' + (options.fix ? ' --fix' : ''),
-    '*.{ts,js,tsx,jsx}':
-      'eslint --config src/.eslintrc.js' + (options.fix ? ' --fix' : ''),
-  };
-
-  if (!options.fix) {
-    config['*.ts?(x)'] = () => 'npm run typecheck';
-  }
 
-  return config;
+  return passed ? 0 : 1;
 }
 
 function isCurrentBranchAncestorOf(base: string): boolean {