diff --git a/.github/workflows/functional-tests.yml b/.github/workflows/functional-tests.yml
index 2d53eb30443..83fd0fe5716 100644
--- a/.github/workflows/functional-tests.yml
+++ b/.github/workflows/functional-tests.yml
@@ -42,6 +42,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+      with:
+        fetch-depth: 2
 
     - name: Set up Node
       uses: actions/setup-node@v4
@@ -58,13 +60,25 @@ jobs:
         python3 -m pip install --upgrade pip
         python3 -m pip install -r requirements/local.txt
 
+    - name: Get changed files
+      id: changed-files
+      uses: tj-actions/changed-files@v44.5.2
+      with:
+        separator: '___'
+
     - name: Set up initial data
       run: ./refresh-data.sh test.sql.gz
 
+    - name: Prepare config
+      env:
+        CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
+      run: ./test/cypress/run-specs.sh
+
     - name: Run Cypress
       uses: cypress-io/github-action@v6
       with:
         build: yarn build
+        config-file: test/cypress/cypress.config.mjs
         start: python cfgov/manage.py runserver 0.0.0.0:8000
         wait-on: 'http://localhost:8000'
 
diff --git a/.gitignore b/.gitignore
index d81818bbdfc..4eb11cb2e4c 100755
--- a/.gitignore
+++ b/.gitignore
@@ -126,6 +126,7 @@ nosetests.xml
 coverage.xml
 .snyk
 test/cypress/screenshots/
+test/cypress/cypress.config.mjs
 
 # Temp data backups #
 ###############
diff --git a/package.json b/package.json
index 06c46847e58..1b1ec7973a5 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,9 @@
     "styles": "yarn build styles",
     "scripts": "yarn build scripts",
     "watch": "yarn build watch",
-    "build": "node ./esbuild/build.js"
+    "build": "node ./esbuild/build.js",
+    "cypress": "./node_modules/.bin/cypress run --config-file test/cypress/cypress.template.mjs",
+    "fast-cypress": "./test/cypress/run-specs.sh && ./node_modules/.bin/cypress run --config-file test/cypress/cypress.config.mjs"
   },
   "prettier": {
     "singleQuote": true
diff --git a/cypress.config.js b/test/cypress/cypress.template.mjs
similarity index 100%
rename from cypress.config.js
rename to test/cypress/cypress.template.mjs
diff --git a/test/cypress/dummy.cy.js b/test/cypress/dummy.cy.js
new file mode 100644
index 00000000000..e2eb8c61129
--- /dev/null
+++ b/test/cypress/dummy.cy.js
@@ -0,0 +1,5 @@
+describe('Dummy suite', () => {
+  it('Does not integration tests on uninteresting commits', () => {
+    expect(true).to.equal(true)
+  });
+})
diff --git a/test/cypress/run-specs.sh b/test/cypress/run-specs.sh
new file mode 100755
index 00000000000..a6cb19430cf
--- /dev/null
+++ b/test/cypress/run-specs.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+echo -n "${CHANGED_FILES:-$(git --no-pager diff --name-only origin/main)}" \
+  | sed 's/___/\n/g' \
+  | node "$(git rev-parse --show-toplevel)/test/cypress/spec-map.js"
diff --git a/test/cypress/spec-map.js b/test/cypress/spec-map.js
new file mode 100644
index 00000000000..89d9aa268e3
--- /dev/null
+++ b/test/cypress/spec-map.js
@@ -0,0 +1,259 @@
+import path from 'path';
+import { fileURLToPath } from 'url';
+import { readFileSync, writeFileSync } from 'node:fs';
+import * as readline from 'node:readline';
+import { stdin as input, stdout as output } from 'node:process';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const FULL_SUITE = "'test/cypress/integration/**/*.cy.{js,jsx,ts,tsx}'";
+
+const rl = readline.createInterface({ input, output, terminal: false });
+
+const candidates = [];
+
+const directories = [
+  [
+    [
+      'cfgov/unprocessed/apps/filing-instruction-guide',
+      'cfgov/filing_instruction_guide',
+      'cfgov/unprocessed/js/organisms/SecondaryNav.js',
+      'cfgov/unprocessed/css/organisms/secondary-nav.less',
+      'cfgov/v1/jinja2/v1/includes/organisms/secondary-nav-fig.html',
+    ],
+    'compliance/small-business-lending',
+  ],
+  [[/cfgov\/v1\/.*\.py/], 'admin'],
+  [
+    ['cfgov/unprocessed/apps/ask-cfpb', 'cfgov/ask_cfpb'],
+    'consumer-tools/ask-cfpb',
+  ],
+  [
+    [
+      'cfgov/unprocessed/apps/retirement',
+      'cfgov/retirement_api',
+      'cfgov/unprocessed/js/modules/util/format.js',
+    ],
+    'consumer-tools/before-you-claim',
+  ],
+  [
+    [
+      'cfgov/unprocessed/apps/tccp',
+      'cfgov/tccp',
+      'cfgov/unprocessed/js/modules/util/web-storage-proxy',
+    ],
+    'consumer-tools/credit-cards',
+  ],
+  [
+    ['cfgov/unprocessed/apps/financial-well-being', 'cfgov/wellbeing'],
+    'consumer-tools/financial-well-being',
+  ],
+  [
+    [
+      'cfgov/unprocessed/apps/find-a-housing-counselor',
+      'cfgov/housing_counselor',
+    ],
+    'consumer-tools/find-a-housing-counselor',
+  ],
+  [
+    ['cfgov/unprocessed/apps/ask-cfpb', 'cfgov/ask_cfpb'],
+    'consumer-tools/obtener-respuestas',
+  ],
+  [
+    [
+      'cfgov/unprocessed/apps/owning-a-home',
+      'cfgov/jinja2/owning-a-home',
+      'cfgov/unprocessed/js/modules/util/format.js',
+    ],
+    'consumer-tools/owning-a-home',
+  ],
+  [
+    [
+      'cfgov/unprocessed/apps/rural-or-underserved-tool',
+      'cfgov/jinja2/rural-or-underserved',
+    ],
+    'consumer-tools/rural-or-underserved-tool',
+  ],
+  [
+    [
+      'cfgov/unprocessed/apps/teachers-digital-platform',
+      'cfgov/teachers_digital_platform',
+    ],
+    'consumer-tools/tdp-activity-search',
+  ],
+  [
+    [
+      'cfgov/unprocessed/js/routes/on-demand/chart.js',
+      'cfgov/unprocessed/css/on-demand/chart.less',
+      'cfgov/v1/jinja2/v1/includes/organisms/chart.html',
+      /cfgov\/v1\/.*\.py/,
+    ],
+    'components/cct-charts',
+  ],
+  [
+    [
+      'cfgov/unprocessed/js/routes/on-demand/email-signup.js',
+      'cfgov/v1/jinja2/v1/includes/blocks/email-signup.html',
+      /cfgov\/v1\/.*\.py/,
+    ],
+    'components/email-signup',
+  ],
+  [
+    [
+      'cfgov/unprocessed/js/routes/on-demand/filterable-list-controls.js',
+      'cfgov/unprocessed/js/organisms/FilterableListControls.js',
+      'cfgov/unprocessed/js/modules/util/FormModel.js',
+      'cfgov/unprocessed/css/organisms/filterable-list-controls.less',
+      'cfgov/v1/jinja2/v1/includes/organisms/filterable-list-controls.html',
+      'cfgov/v1/jinja2/v1/includes/organisms/filterable-list-results.html',
+      /cfgov\/v1\/.*\.py/,
+    ],
+    'components/filterable-lists',
+  ],
+  [
+    [
+      'cfgov/unprocessed/js/organisms/Footer.js',
+      'cfgov/unprocessed/js/modules/footer-button.js',
+      'cfgov/unprocessed/css/organisms/footer.less',
+      'cfgov/v1/jinja2/v1/includes/organisms/footer.html',
+      /cfgov\/v1\/.*\.py/,
+    ],
+    'components/footer',
+  ],
+  [
+    [
+      'cfgov/unprocessed/js/organisms/header.js',
+      'cfgov/unprocessed/js/organisms/MegaMenu.js',
+      'cfgov/unprocessed/js/organisms/MegaMenuDesktop.js',
+      'cfgov/unprocessed/js/organisms/MegaMenuMobile.js',
+      'cfgov/unprocessed/js/molecules/GlobalSearch.js',
+      'cfgov/unprocessed/css/organisms/header.less',
+      'cfgov/unprocessed/css/organisms/mega-menu.less',
+      'cfgov/unprocessed/css/molecules/global-eyebrow.less',
+      'cfgov/unprocessed/css/molecules/global-header-cta.less',
+      'cfgov/unprocessed/css/molecules/global-search.less',
+      'cfgov/v1/jinja2/v1/includes/organisms/header.html',
+      'cfgov/mega_menu/jinja2/mega_menu',
+      'cfgov/v1/jinja2/v1/includes/molecules/global-eyebrow.html',
+      'cfgov/v1/jinja2/v1/includes/molecules/global-search.html',
+      'cfgov/v1/jinja2/v1/includes/molecules/global-header-cta.html',
+      /cfgov\/v1\/.*\.py/,
+    ],
+    'components/header',
+  ],
+  [['cfgov/v1/jinja2/v1/layouts/base.html'], 'components/meta'],
+  [
+    [
+      'cfgov/unprocessed/css/organisms/filterable-list-controls.less',
+      'cfgov/unprocessed/js/organisms/FilterableListControls.js',
+      'cfgov/v1/jinja2/v1/includes/organisms/filterable-list-controls.html',
+      /cfgov\/v1\/.*\.py/,
+    ],
+    'components/multiselect',
+  ],
+  [
+    [
+      'cfgov/v1/jinja2/v1/includes/molecules/pagination.html',
+      /cfgov\/v1\/.*\.py/,
+    ],
+    'components/pagination',
+  ],
+  [['cfgov/agreements'], 'data-research/credit-card-agreements-search'],
+  [
+    ['cfgov/unprocessed/apps/prepaid-agreements', 'cfgov/prepaid_agreements'],
+    'data-research/prepaid-agreements-search',
+  ],
+  [
+    [
+      'cfgov/unprocessed/js/routes/on-demand/mortgage-performance-trends.js',
+      'cfgov/unprocessed/css/on-demand/mortgage-performance-trends.less',
+      'cfgov/unprocessed/css/on-demand/chart.less',
+      'cfgov/unprocessed/js/organisms/MortgagePerformanceTrends',
+      'cfgov/v1/jinja2/v1/includes/organisms/mortgage-chart.html',
+      'cfgov/v1/jinja2/v1/includes/organisms/mortgage-map.html',
+      /cfgov\/v1\/.*\.py/,
+      'cfgov/data_research/models.py',
+    ],
+    'data-research/mortgage-performance-trends',
+  ],
+  [
+    [
+      'cfgov/unprocessed/apps/paying-for-college',
+      'cfgov/unprocessed/js/organisms/SecondaryNav.js',
+      'cfgov/unprocessed/css/organisms/secondary-nav.less',
+      'cfgov/paying_for_college',
+    ],
+    'paying-for-college/disclosures',
+  ],
+  [
+    [
+      'cfgov/unprocessed/apps/paying-for-college',
+      'cfgov/unprocessed/js/organisms/SecondaryNav.js',
+      'cfgov/unprocessed/css/organisms/secondary-nav.less',
+      'cfgov/paying_for_college',
+    ],
+    'paying-for-college/your-financial-path-to-graduation',
+  ],
+  [
+    ['cfgov/unprocessed/apps/regulations3k', 'cfgov/regulations3k'],
+    'rules-policy',
+  ],
+  [
+    [
+      'test/cypress/spec-map.js',
+      'requirements/',
+      /^package.json/,
+      /cfgov\/core\/.*\.py/,
+      'cfgov/v1/jinja2/v1/layouts/base.html',
+    ],
+    'all',
+  ],
+];
+
+rl.on('line', (file) => {
+  console.log('File changed:', file);
+  for (const [dList, candidate] of directories) {
+    for (const directory of dList) {
+      if (file.match(directory)) {
+        candidates.push(candidate);
+        break;
+      }
+    }
+    if (file.match('test/cypress/integration/' + candidate)) {
+      candidates.push(candidate);
+    }
+  }
+});
+
+rl.on('close', () => {
+  const deduped = new Set(candidates);
+  if (deduped.has('all')) {
+    console.log('\nChange requires full Cypress suite.');
+    rewriteConfig(FULL_SUITE);
+  } else {
+    console.log(
+      '\nChange requires running Cypress tests in the following directories:\n' +
+        [...deduped].join('\n'),
+    );
+    rewriteConfig(
+      JSON.stringify(
+        [...deduped].map((v) => {
+          return `test/cypress/integration/${v}/*.cy.{js,jsx,ts,tsx}`;
+        }),
+      ),
+    );
+  }
+});
+
+/**
+ * @param {string} specPattern - The spec pattern(s) to match
+ */
+function rewriteConfig(specPattern) {
+  if (specPattern === '[]') specPattern = "'test/cypress/dummy.cy.js'";
+  const tmpl = readFileSync(path.join(__dirname, 'cypress.template.mjs'), {
+    encoding: 'utf8',
+  });
+  const config = tmpl.replace(FULL_SUITE, specPattern);
+  writeFileSync(path.join(__dirname, 'cypress.config.mjs'), config);
+}