From 8b30ab5a6db1c7d7cfdb864c33ba93793e30f75c Mon Sep 17 00:00:00 2001
From: ilia <idobkin@gmail.com>
Date: Wed, 15 Jul 2026 18:17:02 -0400
Subject: [PATCH] Add resilient UI helpers for third-party / adversarial SPAs.

Generalize patterns from LinkedIn automation: aria-label regex locators,
dialog reopen-retry, contenteditable typing, persistent flag-file sessions,
and a default noise exclude preset for NetworkErrorMonitor.
---
 CHANGELOG.md                          |   6 ++
 README.md                             |  57 +++++++++++
 ROADMAP.md                            |  10 ++
 src/browser/aria.test.ts              |  67 +++++++++++++
 src/browser/aria.ts                   |  67 +++++++++++++
 src/browser/dialog.test.ts            |  56 +++++++++++
 src/browser/dialog.ts                 |  50 ++++++++++
 src/browser/index.ts                  |  14 +++
 src/browser/network.test.ts           |  34 +++++++
 src/browser/network.ts                |  27 ++++-
 src/browser/persistentSession.test.ts | 137 ++++++++++++++++++++++++++
 src/browser/persistentSession.ts      | 131 ++++++++++++++++++++++++
 src/browser/richText.test.ts          |  59 +++++++++++
 src/browser/richText.ts               |  57 +++++++++++
 src/index.ts                          |  13 +++
 15 files changed, 784 insertions(+), 1 deletion(-)
 create mode 100644 src/browser/aria.test.ts
 create mode 100644 src/browser/aria.ts
 create mode 100644 src/browser/dialog.test.ts
 create mode 100644 src/browser/dialog.ts
 create mode 100644 src/browser/persistentSession.test.ts
 create mode 100644 src/browser/persistentSession.ts
 create mode 100644 src/browser/richText.test.ts
 create mode 100644 src/browser/richText.ts

diff --git a/CHANGELOG.md b/CHANGELOG.md
index bc5ca2d..3d61f19 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 ## Unreleased
 
+- **Resilient UI automation helpers** — for driving third-party/adversarial SPAs (no stable test ids, occasional bot walls) rather than your own instrumented app:
+  - `byAriaLabel()` / `clickByAriaLabel()` — find/click by a regex over `aria-label`, scoped to a `Page` or a narrower `Locator` (e.g. one dialog)
+  - `withDialog()` — retry an action against a modal that might have silently closed, reopening it first via a caller-supplied `reopen()`
+  - `fillContentEditable()` — type into `contenteditable` rich-text fields (not just `<textarea>`), splitting on blank lines so multi-paragraph/bulleted text renders as separate blocks instead of collapsing
+  - `runPersistentSession()` — keep one browser session open across many runs via `RUN`/`READY`/`CLOSE` flag files instead of relaunching (and re-authenticating) every time; auto-relaunches on an unexpected crash
+  - `NetworkErrorMonitor`: `useDefaultExcludes` + exported `COMMON_NOISE_PATTERNS` (ad/telemetry pixel hosts) so consumers stop hand-rolling the same exclude list per project
 - Ops: npm publish is hard-required in the tag release job (removed soft-fail); `NPM_PUBLISH_TOKEN` + Outline update scopes documented as done in `docs/OPS.md` / `ROADMAP.md`
 
 ## 0.4.0 — 2026-07-15
diff --git a/README.md b/README.md
index 6da530b..b0a8ace 100644
--- a/README.md
+++ b/README.md
@@ -85,6 +85,10 @@ test('sign-out stays on public host', async ({ page, playkitConfig, timings }) =
 | `saveStorageState` / `storageStateUse` | Auth once, reuse across specs |
 | `playkitFailureArtifacts` | Trace/video/screenshot only on failure |
 | `interceptNetworkCall` | Spy or mock the next matching page network call |
+| `byAriaLabel` / `clickByAriaLabel` | Find/click by a regex over `aria-label`, scoped to a page or a narrower locator |
+| `withDialog` | Retry an action against a modal that might have silently closed, reopening it first |
+| `fillContentEditable` | Type into `contenteditable` rich-text fields with real paragraph breaks |
+| `runPersistentSession` | Keep one browser session open across runs via flag files instead of relaunching/re-authenticating |
 | `playkit` CLI | `init` scaffold + `smoke` post-deploy gate |
 
 See also `docs/NETWORK.md`, `docs/SELFTEST.md`, `docs/NPM_REGISTRY.md`, `docs/OPS.md`, `docs/IDEAS.md`, `docs/OUTLINE.md`.
@@ -105,6 +109,59 @@ try {
 }
 ```
 
+## Resilient UI automation (third-party / adversarial SPAs)
+
+`click`/`fill`/`waitForVisible` above assume you already have a correct
+`Locator` — great when you control the markup and have stable test ids. These
+helpers are for the opposite case: driving a third-party site you don't
+control, where selectors are dynamic/compound (aria-labels that embed
+record-specific text), rich-text fields aren't real `<textarea>`s, modals
+close out from under you, and the site has its own bot-detection you'd rather
+not retrigger by relaunching the browser on every run.
+
+```ts
+import {
+  byAriaLabel,
+  clickByAriaLabel,
+  withDialog,
+  fillContentEditable,
+  runPersistentSession,
+} from '@levkin/playkit';
+
+// aria-label is often compound + record-specific ("Edit Staff Automation
+// Engineer at NiyaSoft") — a regex survives per-record text variation better
+// than an exact string copied from one DOM dump.
+await clickByAriaLabel(page, /Edit.*at NiyaSoft/i);
+
+// Re-open the dialog and retry if it closed underneath you mid-flow.
+await withDialog(
+  {
+    isOpen: () => page.getByRole('button', { name: 'Save' }).isVisible(),
+    reopen: () => clickByAriaLabel(page, /Edit.*at NiyaSoft/i),
+  },
+  async () => {
+    await fillContentEditable(page.locator('[contenteditable="true"]').first(), longBioText);
+    await page.getByRole('button', { name: 'Save' }).click();
+  },
+);
+
+// Keep ONE browser open across many runs — touch RUN/READY/CLOSE flag files
+// instead of relaunching (and re-triggering captchas) each time.
+await runPersistentSession({
+  dir: '.session',
+  storageStatePath: '.session/state.json',
+  launch: async () => {
+    const browser = await chromium.launch({ headless: false });
+    const context = await browser.newContext();
+    const page = await context.newPage();
+    return { browser, context, page };
+  },
+  onRun: async ({ page }) => {
+    /* your flow against the live page */
+  },
+});
+```
+
 ## Email testing (Mailpit default, Mailtrap optional)
 
 `createMailInbox()` picks the provider from `PLAYKIT_MAIL_PROVIDER` (default
diff --git a/ROADMAP.md b/ROADMAP.md
index 315362f..f33c0f3 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -15,6 +15,16 @@ Living plan for making `@levkin/playkit` more useful across Levkin repos.
 - [ ] End adoption pause — migrate first extra consumer (`screening` candidate)
 - [ ] Evaluate `playwright-exporter` for scheduled synthetics (may supersede bespoke cron wrappers around `playkit smoke`)
 
+## Done since v0.4.0 (resilient UI automation)
+
+Pulled from real friction driving LinkedIn (third-party, bot-walled, no test ids) from a Cursor/Camoufox automation — see the resume repo's `scripts/linkedin-polish-all.mjs` for the original hand-rolled versions these replace.
+
+- [x] `byAriaLabel` / `clickByAriaLabel` — regex-over-`aria-label` locator, scoped to page or a narrower locator
+- [x] `withDialog` — reopen-and-retry wrapper for modals that can silently close mid-flow
+- [x] `fillContentEditable` — real-keyboard typing into `contenteditable` rich text with paragraph breaks
+- [x] `runPersistentSession` — flag-file-driven long-lived browser session (RUN/READY/CLOSE), auto-relaunch on crash
+- [x] `NetworkErrorMonitor` `useDefaultExcludes` + `COMMON_NOISE_PATTERNS` (ad/telemetry noise preset)
+
 ## Done since v0.4.0 (ops)
 
 - [x] **Wire `NPM_PUBLISH_TOKEN` / `write:package`** — `@levkin/playkit@0.4.0` published; Actions secret + `vault_playkit_npm_token`; release job no longer soft-fails (`docs/OPS.md`)
diff --git a/src/browser/aria.test.ts b/src/browser/aria.test.ts
new file mode 100644
index 0000000..e33f3fd
--- /dev/null
+++ b/src/browser/aria.test.ts
@@ -0,0 +1,67 @@
+import { describe, expect, it, vi } from 'vitest';
+import type { Locator, Page } from '@playwright/test';
+import { byAriaLabel, clickByAriaLabel } from './aria.js';
+
+function mockLocatorList(labels: string[]) {
+  const clicked: number[] = [];
+  const nth = (i: number) =>
+    ({
+      getAttribute: vi.fn(async (name: string) => (name === 'aria-label' ? labels[i] ?? null : null)),
+      click: vi.fn(async () => {
+        clicked.push(i);
+      }),
+      waitFor: vi.fn(async () => undefined),
+    }) as unknown as Locator;
+
+  const list = {
+    count: vi.fn(async () => labels.length),
+    nth: vi.fn((i: number) => nth(i)),
+  } as unknown as Locator;
+
+  return { list, clicked };
+}
+
+function mockRoot(labels: string[]) {
+  const { list, clicked } = mockLocatorList(labels);
+  const root = {
+    locator: vi.fn(() => list),
+  } as unknown as Page;
+  return { root, clicked };
+}
+
+describe('byAriaLabel', () => {
+  it('returns the first locator whose aria-label matches the pattern', async () => {
+    const { root } = mockRoot(['Home', 'Edit AI Engineer at Levkin Inc.', 'Edit About']);
+    const found = await byAriaLabel(root, /Edit.*at Levkin/i);
+    expect(found).not.toBeNull();
+    expect(await found!.getAttribute('aria-label')).toBe('Edit AI Engineer at Levkin Inc.');
+  });
+
+  it('returns null when nothing matches', async () => {
+    const { root } = mockRoot(['Home', 'Notifications']);
+    const found = await byAriaLabel(root, /Edit.*Nonexistent/i);
+    expect(found).toBeNull();
+  });
+
+  it('is scoped to whatever root is passed (page or a narrower locator)', async () => {
+    const { root: dialogRoot } = mockRoot(['Save', 'Cancel']);
+    const found = await byAriaLabel(dialogRoot, /Save/);
+    expect(found).not.toBeNull();
+  });
+});
+
+describe('clickByAriaLabel', () => {
+  it('finds and clicks the matching element, returning its label', async () => {
+    const { root, clicked } = mockRoot(['Home', 'Edit AI Engineer at Levkin Inc.']);
+    const label = await clickByAriaLabel(root, /Edit.*at Levkin/i);
+    expect(label).toBe('Edit AI Engineer at Levkin Inc.');
+    expect(clicked).toEqual([1]);
+  });
+
+  it('throws a descriptive error when nothing matches', async () => {
+    const { root } = mockRoot(['Home']);
+    await expect(clickByAriaLabel(root, /Edit.*Nonexistent/i)).rejects.toThrow(
+      /no element with aria-label matching/,
+    );
+  });
+});
diff --git a/src/browser/aria.ts b/src/browser/aria.ts
new file mode 100644
index 0000000..7c6768d
--- /dev/null
+++ b/src/browser/aria.ts
@@ -0,0 +1,67 @@
+import type { Locator, Page } from '@playwright/test';
+import { createLogger, type Logger } from '../logging/logger.js';
+import { click as clickHelper, type ClickOptions } from './actions.js';
+
+export interface ByAriaLabelOptions {
+  /** Element tags to scan (default: interactive-ish: button, a, [role=button]/[role=link]). */
+  selector?: string;
+  logger?: Logger;
+}
+
+const DEFAULT_SELECTOR =
+  'button[aria-label], a[aria-label], [role="button"][aria-label], [role="link"][aria-label]';
+
+/**
+ * Find the first element whose `aria-label` matches `pattern`, scoped to `root`
+ * (a Page or a Locator, e.g. a specific dialog) so unrelated matches elsewhere
+ * on the page don't win.
+ *
+ * Built for third-party UIs where you don't control markup and can't rely on
+ * stable test ids — aria-labels there are often compound and dynamic (e.g.
+ * "Edit Staff Automation Engineer at NiyaSoft"), so exact-string locators
+ * extracted from a single DOM dump tend to be brittle; a regex survives
+ * per-record text variation.
+ *
+ * Returns `null` (rather than throwing) when nothing matches, so callers can
+ * fall back to an alternate strategy (e.g. a nearby icon button) before
+ * giving up — see `withDialog` for retrying the whole lookup after a reopen.
+ */
+export async function byAriaLabel(
+  root: Page | Locator,
+  pattern: RegExp,
+  options?: ByAriaLabelOptions,
+): Promise<Locator | null> {
+  const log = options?.logger ?? createLogger({ name: 'byAriaLabel' });
+  const selector = options?.selector ?? DEFAULT_SELECTOR;
+  const candidates = root.locator(selector);
+  const count = await candidates.count();
+  for (let i = 0; i < count; i++) {
+    const el = candidates.nth(i);
+    const label = await el.getAttribute('aria-label');
+    if (label && pattern.test(label)) {
+      log.debug('byAriaLabel matched', { pattern: pattern.source, label });
+      return el;
+    }
+  }
+  log.debug('byAriaLabel no match', { pattern: pattern.source, scanned: count });
+  return null;
+}
+
+/**
+ * `byAriaLabel` + click in one call. Throws with the pattern in the message
+ * (instead of a generic "locator not found") when nothing matches, since that's
+ * the single most useful piece of context when debugging a failed run later.
+ */
+export async function clickByAriaLabel(
+  root: Page | Locator,
+  pattern: RegExp,
+  options?: ByAriaLabelOptions & ClickOptions,
+): Promise<string> {
+  const found = await byAriaLabel(root, pattern, options);
+  if (!found) {
+    throw new Error(`clickByAriaLabel: no element with aria-label matching ${pattern} found`);
+  }
+  const label = (await found.getAttribute('aria-label')) ?? '';
+  await clickHelper(found, options);
+  return label;
+}
diff --git a/src/browser/dialog.test.ts b/src/browser/dialog.test.ts
new file mode 100644
index 0000000..543d6f1
--- /dev/null
+++ b/src/browser/dialog.test.ts
@@ -0,0 +1,56 @@
+import { describe, expect, it, vi } from 'vitest';
+import { withDialog } from './dialog.js';
+
+describe('withDialog', () => {
+  it('runs fn directly when the dialog is already open', async () => {
+    const isOpen = vi.fn(async () => true);
+    const reopen = vi.fn(async () => undefined);
+    const fn = vi.fn(async () => 'ok');
+
+    const result = await withDialog({ isOpen, reopen }, fn);
+
+    expect(result).toBe('ok');
+    expect(reopen).not.toHaveBeenCalled();
+    expect(fn).toHaveBeenCalledOnce();
+  });
+
+  it('reopens the dialog first when it is not open', async () => {
+    const isOpen = vi.fn(async () => false);
+    const reopen = vi.fn(async () => undefined);
+    const fn = vi.fn(async () => 'ok');
+
+    const result = await withDialog({ isOpen, reopen }, fn);
+
+    expect(result).toBe('ok');
+    expect(reopen).toHaveBeenCalledOnce();
+  });
+
+  it('retries with a reopen after fn throws, then succeeds', async () => {
+    const isOpen = vi.fn(async () => true);
+    const reopen = vi.fn(async () => undefined);
+    let calls = 0;
+    const fn = vi.fn(async () => {
+      calls += 1;
+      if (calls === 1) throw new Error('modal lost');
+      return 'recovered';
+    });
+
+    const result = await withDialog({ isOpen, reopen }, fn, { retries: 1 });
+
+    expect(result).toBe('recovered');
+    expect(fn).toHaveBeenCalledTimes(2);
+  });
+
+  it('throws the last error once retries are exhausted', async () => {
+    const isOpen = vi.fn(async () => true);
+    const reopen = vi.fn(async () => undefined);
+    const fn = vi.fn(async () => {
+      throw new Error('still broken');
+    });
+
+    await expect(withDialog({ isOpen, reopen }, fn, { retries: 1 })).rejects.toThrow(
+      'still broken',
+    );
+    expect(fn).toHaveBeenCalledTimes(2);
+  });
+});
diff --git a/src/browser/dialog.ts b/src/browser/dialog.ts
new file mode 100644
index 0000000..1847122
--- /dev/null
+++ b/src/browser/dialog.ts
@@ -0,0 +1,50 @@
+import { createLogger, type Logger } from '../logging/logger.js';
+
+export interface WithDialogHandlers {
+  /** True when the dialog/modal is currently open and usable. */
+  isOpen: () => Promise<boolean>;
+  /** Re-open the dialog (e.g. re-click the trigger, re-navigate). */
+  reopen: () => Promise<void>;
+}
+
+export interface WithDialogOptions {
+  /** How many times to reopen-and-retry after a failure (default 1 = two attempts total). */
+  retries?: number;
+  logger?: Logger;
+}
+
+/**
+ * Run `fn` against a dialog/modal that a third-party SPA might silently close
+ * out from under you (re-render, toast, navigation) between when you opened
+ * it and when you finish interacting with it.
+ *
+ * Checks `isOpen()` before each attempt and calls `reopen()` if it's not —
+ * this is the "modal lost — reopen" retry pattern, generalized instead of
+ * hand-rolled per call site.
+ */
+export async function withDialog<T>(
+  handlers: WithDialogHandlers,
+  fn: () => Promise<T>,
+  options?: WithDialogOptions,
+): Promise<T> {
+  const log = options?.logger ?? createLogger({ name: 'withDialog' });
+  const retries = options?.retries ?? 1;
+  let lastErr: unknown;
+
+  for (let attempt = 0; attempt <= retries; attempt++) {
+    if (!(await handlers.isOpen())) {
+      log.warn('dialog not open — reopening', { attempt });
+      await handlers.reopen();
+    }
+    try {
+      return await fn();
+    } catch (err) {
+      lastErr = err;
+      log.warn('withDialog attempt failed', {
+        attempt,
+        error: err instanceof Error ? err.message : String(err),
+      });
+    }
+  }
+  throw lastErr;
+}
diff --git a/src/browser/index.ts b/src/browser/index.ts
index 99ad24a..97807b1 100644
--- a/src/browser/index.ts
+++ b/src/browser/index.ts
@@ -21,9 +21,23 @@ export {
   dedupeNetworkErrors,
   globToRegExp,
   responseMatchesFilter,
+  COMMON_NOISE_PATTERNS,
   type FulfillResponse,
   type InterceptNetworkCallOptions,
   type InterceptedNetworkCall,
   type NetworkError,
   type NetworkErrorMonitorOptions,
 } from './network.js';
+export {
+  byAriaLabel,
+  clickByAriaLabel,
+  type ByAriaLabelOptions,
+} from './aria.js';
+export { withDialog, type WithDialogHandlers, type WithDialogOptions } from './dialog.js';
+export { fillContentEditable, type FillContentEditableOptions } from './richText.js';
+export {
+  runPersistentSession,
+  isBrowserCrashError,
+  type PersistentSessionOptions,
+  type LaunchedSession,
+} from './persistentSession.js';
diff --git a/src/browser/network.test.ts b/src/browser/network.test.ts
index 2cd8080..2814881 100644
--- a/src/browser/network.test.ts
+++ b/src/browser/network.test.ts
@@ -1,6 +1,7 @@
 import { describe, expect, it, vi } from 'vitest';
 import type { Page, Request, Response, Route } from '@playwright/test';
 import {
+  COMMON_NOISE_PATTERNS,
   dedupeNetworkErrors,
   globToRegExp,
   interceptNetworkCall,
@@ -180,6 +181,39 @@ describe('NetworkErrorMonitor', () => {
     net.stop();
   });
 
+  it('leaves default noise (ad/telemetry pixels) untouched unless useDefaultExcludes is set', () => {
+    const page = createMockPage();
+    const net = startNetworkErrorMonitor(page);
+    page.emitResponse(mockResponse({ status: 502, url: 'https://www.googletagmanager.com/gtm.js' }));
+    expect(net.getErrors()).toHaveLength(1);
+    net.stop();
+  });
+
+  it('useDefaultExcludes filters COMMON_NOISE_PATTERNS in addition to custom excludePatterns', () => {
+    const page = createMockPage();
+    const net = startNetworkErrorMonitor(page, {
+      useDefaultExcludes: true,
+      excludePatterns: ['my-own-cdn.example.com'],
+    });
+
+    page.emitResponse(mockResponse({ status: 502, url: 'https://www.googletagmanager.com/gtm.js' }));
+    page.emitResponse(mockResponse({ status: 500, url: 'https://my-own-cdn.example.com/x.js' }));
+    page.emitResponse(mockResponse({ status: 503, url: 'https://app.example.com/real-endpoint' }));
+
+    expect(net.getErrors()).toEqual([
+      expect.objectContaining({ url: 'https://app.example.com/real-endpoint' }),
+    ]);
+    net.stop();
+  });
+
+  it('COMMON_NOISE_PATTERNS matches the ad/telemetry hosts it documents', () => {
+    expect(matchesExcludePattern('https://www.doubleclick.net/x', COMMON_NOISE_PATTERNS)).toBe(true);
+    expect(matchesExcludePattern('https://connect.facebook.net/x', COMMON_NOISE_PATTERNS)).toBe(true);
+    expect(matchesExcludePattern('https://app.example.com/api/users', COMMON_NOISE_PATTERNS)).toBe(
+      false,
+    );
+  });
+
   it('stop() ignores further responses', () => {
     const page = createMockPage();
     const net = startNetworkErrorMonitor(page);
diff --git a/src/browser/network.ts b/src/browser/network.ts
index 5cd22fe..28d771c 100644
--- a/src/browser/network.ts
+++ b/src/browser/network.ts
@@ -162,9 +162,32 @@ export interface NetworkError {
   timestamp: string;
 }
 
+/**
+ * Ad/telemetry/tracking-pixel hosts that routinely 4xx/5xx in the background
+ * on third-party sites and are almost never what you're debugging. Opt in via
+ * `useDefaultExcludes: true` — off by default so existing consumers asserting
+ * against their own app's traffic see no behavior change.
+ */
+export const COMMON_NOISE_PATTERNS: Array<string | RegExp> = [
+  'doubleclick.net',
+  'googlesyndication.com',
+  'google-analytics.com',
+  'googletagmanager.com',
+  'facebook.com/tr',
+  'connect.facebook.net',
+  'segment.io',
+  'segment.com',
+  /\bads?\b/i,
+  /\/pixel(\/|\?|$)/i,
+  /\btelemetry\b/i,
+  /\btrack(ing)?\b/i,
+];
+
 export interface NetworkErrorMonitorOptions {
   /** Skip matching URLs (string substring or RegExp). */
   excludePatterns?: Array<string | RegExp>;
+  /** Also skip anything matching `COMMON_NOISE_PATTERNS` (default false). */
+  useDefaultExcludes?: boolean;
   /** Minimum status to treat as an error (default 400). */
   minStatus?: number;
   logger?: Logger;
@@ -202,7 +225,9 @@ export class NetworkErrorMonitor {
   ) {
     const log = options.logger ?? createLogger({ name: 'NetworkErrorMonitor' });
     const minStatus = options.minStatus ?? 400;
-    const exclude = options.excludePatterns ?? [];
+    const exclude = options.useDefaultExcludes
+      ? [...COMMON_NOISE_PATTERNS, ...(options.excludePatterns ?? [])]
+      : options.excludePatterns ?? [];
 
     this.onResponse = (response: Response) => {
       if (this.stopped) return;
diff --git a/src/browser/persistentSession.test.ts b/src/browser/persistentSession.test.ts
new file mode 100644
index 0000000..0db6e4c
--- /dev/null
+++ b/src/browser/persistentSession.test.ts
@@ -0,0 +1,137 @@
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import { mkdtempSync, rmSync, writeFileSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import type { Browser, BrowserContext, Page } from '@playwright/test';
+import { isBrowserCrashError, runPersistentSession } from './persistentSession.js';
+
+function mockSession() {
+  const context = {
+    storageState: vi.fn(async () => undefined),
+  } as unknown as BrowserContext;
+  const page = {
+    url: vi.fn(() => 'https://example.com'),
+  } as unknown as Page;
+  const browser = {
+    isConnected: vi.fn(() => true),
+    close: vi.fn(async () => undefined),
+  } as unknown as Browser;
+  return { browser, context, page };
+}
+
+describe('isBrowserCrashError', () => {
+  it('recognizes common Playwright crash messages', () => {
+    expect(isBrowserCrashError(new Error('Target page, context or browser has been closed'))).toBe(
+      true,
+    );
+    expect(isBrowserCrashError(new Error('Target closed'))).toBe(true);
+    expect(isBrowserCrashError(new Error('something else'))).toBe(false);
+  });
+});
+
+describe('runPersistentSession', () => {
+  let dir: string;
+
+  afterEach(() => {
+    if (dir) rmSync(dir, { recursive: true, force: true });
+  });
+
+  it('runs onRun once at start, then exits once onRun touches CLOSE', async () => {
+    dir = mkdtempSync(join(tmpdir(), 'playkit-session-'));
+    const session = mockSession();
+    const launch = vi.fn(async () => session);
+    const onRun = vi.fn(async () => {
+      writeFileSync(join(dir, 'CLOSE'), '');
+    });
+
+    await runPersistentSession({ dir, launch, onRun, pollMs: 5 });
+
+    expect(launch).toHaveBeenCalledOnce();
+    expect(onRun).toHaveBeenCalledOnce();
+    expect(session.browser.close).toHaveBeenCalledOnce();
+  });
+
+  it('re-runs onRun when RUN is touched, saving storage state on each success', async () => {
+    dir = mkdtempSync(join(tmpdir(), 'playkit-session-'));
+    const storageStatePath = join(dir, 'state.json');
+    const session = mockSession();
+    const launch = vi.fn(async () => session);
+    let calls = 0;
+    const onRun = vi.fn(async () => {
+      calls += 1;
+      if (calls === 1) {
+        setTimeout(() => writeFileSync(join(dir, 'RUN'), ''), 20);
+      } else {
+        writeFileSync(join(dir, 'CLOSE'), '');
+      }
+    });
+
+    await runPersistentSession({ dir, launch, onRun, storageStatePath, pollMs: 5 });
+
+    expect(onRun).toHaveBeenCalledTimes(2);
+    // Once after each successful run, plus once more on the final CLOSE shutdown.
+    expect(session.context.storageState).toHaveBeenCalledTimes(3);
+  });
+
+  it('relaunches automatically when the page/browser looks dead', async () => {
+    dir = mkdtempSync(join(tmpdir(), 'playkit-session-'));
+    const freshSession = mockSession();
+    const deadPage = {
+      url: vi.fn(() => {
+        throw new Error('closed');
+      }),
+    } as unknown as Page;
+    const deadBrowser = {
+      isConnected: vi.fn(() => false),
+      close: vi.fn(async () => undefined),
+    } as unknown as Browser;
+
+    let launchCount = 0;
+    const launch = vi.fn(async () => {
+      launchCount += 1;
+      if (launchCount === 1) {
+        return { browser: deadBrowser, context: freshSession.context, page: deadPage };
+      }
+      return freshSession;
+    });
+    const onRun = vi.fn(async () => {
+      writeFileSync(join(dir, 'CLOSE'), '');
+    });
+
+    await runPersistentSession({ dir, launch, onRun, pollMs: 5 });
+
+    expect(launch).toHaveBeenCalledTimes(2);
+    expect(onRun).toHaveBeenCalledOnce();
+  });
+
+  it('keeps the session open when onError returns true, and stops once CLOSE appears', async () => {
+    dir = mkdtempSync(join(tmpdir(), 'playkit-session-'));
+    const session = mockSession();
+    const launch = vi.fn(async () => session);
+    let calls = 0;
+    const onRun = vi.fn(async () => {
+      calls += 1;
+      throw new Error('boom');
+    });
+    const onError = vi.fn(async () => {
+      writeFileSync(join(dir, 'CLOSE'), '');
+      return true;
+    });
+
+    await runPersistentSession({ dir, launch, onRun, onError, pollMs: 5 });
+
+    expect(calls).toBe(1);
+    expect(onError).toHaveBeenCalledOnce();
+  });
+
+  it('rethrows when onError is not provided', async () => {
+    dir = mkdtempSync(join(tmpdir(), 'playkit-session-'));
+    const session = mockSession();
+    const launch = vi.fn(async () => session);
+    const onRun = vi.fn(async () => {
+      throw new Error('fatal');
+    });
+
+    await expect(runPersistentSession({ dir, launch, onRun, pollMs: 5 })).rejects.toThrow('fatal');
+  });
+});
diff --git a/src/browser/persistentSession.ts b/src/browser/persistentSession.ts
new file mode 100644
index 0000000..1fb49ff
--- /dev/null
+++ b/src/browser/persistentSession.ts
@@ -0,0 +1,131 @@
+import { existsSync, mkdirSync, unlinkSync } from 'node:fs';
+import { join } from 'node:path';
+import type { Browser, BrowserContext, Page } from '@playwright/test';
+import { createLogger, type Logger } from '../logging/logger.js';
+import { saveStorageState } from './storageState.js';
+
+export interface LaunchedSession {
+  browser: Browser;
+  context: BrowserContext;
+  page: Page;
+}
+
+export interface PersistentSessionOptions {
+  /** Directory for control flag files (and, by default, storage state). */
+  dir: string;
+  /** (Re)launch the browser/context/page. Called on start and after any crash. */
+  launch: () => Promise<LaunchedSession>;
+  /** Runs once at start, and again every time RUN or READY is touched. */
+  onRun: (session: LaunchedSession) => Promise<void>;
+  /**
+   * Called when `onRun` throws (after a browser-crash relaunch is already
+   * handled internally). Return `true` to keep the session open and wait for
+   * a manual RUN (e.g. after a human clears a captcha); return `false`, or
+   * don't provide this, to rethrow and stop the loop.
+   */
+  onError?: (error: unknown, session: LaunchedSession) => Promise<boolean> | boolean;
+  /** Path to persist storage state (cookies + localStorage) after each successful run. */
+  storageStatePath?: string;
+  /** Flag filenames, relative to `dir` (defaults: RUN / READY / CLOSE). */
+  flags?: { run?: string; ready?: string; close?: string };
+  /** Poll interval in ms while idle (default 2000). */
+  pollMs?: number;
+  logger?: Logger;
+}
+
+const CRASH_PATTERN = /context or browser has been closed|Target (page|closed)|Target page/i;
+
+/** Exported for tests; true when `err` looks like the page/browser died mid-run. */
+export function isBrowserCrashError(err: unknown): boolean {
+  const msg = err instanceof Error ? err.message : String(err);
+  return CRASH_PATTERN.test(msg);
+}
+
+function clearFlag(path: string): void {
+  try {
+    unlinkSync(path);
+  } catch {
+    /* already gone */
+  }
+}
+
+/**
+ * Keep ONE browser session open across many automation runs, controlled by
+ * flag files instead of process restarts/relogins.
+ *
+ * Built for sites with bot-detection or occasional captchas, where closing
+ * and reopening the browser on every run is slow and can itself trip
+ * anti-automation heuristics. Instead:
+ *
+ *   - touch `<dir>/RUN`   — re-run `onRun` against the *same* page
+ *   - touch `<dir>/READY` — same as RUN (semantic alias: "I cleared the captcha")
+ *   - touch `<dir>/CLOSE` — save storage state (if configured) and shut down
+ *
+ * If the browser process dies unexpectedly (crash, manual close), it's
+ * relaunched automatically via `launch()` and `onRun` is re-armed to fire on
+ * the next iteration.
+ */
+export async function runPersistentSession(options: PersistentSessionOptions): Promise<void> {
+  const log = options.logger ?? createLogger({ name: 'persistentSession' });
+  mkdirSync(options.dir, { recursive: true });
+  const runFlag = join(options.dir, options.flags?.run ?? 'RUN');
+  const readyFlag = join(options.dir, options.flags?.ready ?? 'READY');
+  const closeFlag = join(options.dir, options.flags?.close ?? 'CLOSE');
+  const pollMs = options.pollMs ?? 2000;
+
+  clearFlag(runFlag);
+  clearFlag(readyFlag);
+  clearFlag(closeFlag);
+
+  let session = await options.launch();
+  let doneOnce = false;
+
+  while (!existsSync(closeFlag)) {
+    let dead = false;
+    try {
+      void session.page.url();
+    } catch {
+      dead = true;
+    }
+    if (dead || !session.browser.isConnected()) {
+      log.warn('browser closed unexpectedly — relaunching');
+      session = await options.launch();
+      doneOnce = false;
+      continue;
+    }
+
+    const forced = existsSync(runFlag) || existsSync(readyFlag);
+    if (forced) {
+      clearFlag(runFlag);
+      clearFlag(readyFlag);
+    }
+
+    if (!doneOnce || forced) {
+      try {
+        await options.onRun(session);
+        doneOnce = true;
+        if (options.storageStatePath) {
+          await saveStorageState(session.context, options.storageStatePath);
+        }
+        log.info('run complete — session stays open (touch RUN to retry, CLOSE to quit)');
+      } catch (err) {
+        if (isBrowserCrashError(err)) {
+          log.warn('browser closed mid-run — will relaunch');
+          doneOnce = false;
+          continue;
+        }
+        log.error('run failed', { error: err instanceof Error ? err.message : String(err) });
+        const keepOpen = options.onError ? await options.onError(err, session) : false;
+        doneOnce = true;
+        if (!keepOpen) throw err;
+      }
+    }
+    await new Promise((r) => setTimeout(r, pollMs));
+  }
+
+  log.info('CLOSE flag — shutting down');
+  if (options.storageStatePath) {
+    await saveStorageState(session.context, options.storageStatePath).catch(() => undefined);
+  }
+  await session.browser.close().catch(() => undefined);
+}
diff --git a/src/browser/richText.test.ts b/src/browser/richText.test.ts
new file mode 100644
index 0000000..1106895
--- /dev/null
+++ b/src/browser/richText.test.ts
@@ -0,0 +1,59 @@
+import { describe, expect, it, vi } from 'vitest';
+import type { Locator, Page } from '@playwright/test';
+import { fillContentEditable } from './richText.js';
+
+function mockLocator() {
+  const pressed: string[] = [];
+  const typed: string[] = [];
+  const page = {
+    keyboard: {
+      press: vi.fn(async (key: string) => {
+        pressed.push(key);
+      }),
+      type: vi.fn(async (text: string) => {
+        typed.push(text);
+      }),
+    },
+  } as unknown as Page;
+
+  const locator = {
+    waitFor: vi.fn(async () => undefined),
+    click: vi.fn(async () => undefined),
+    page: vi.fn(() => page),
+  } as unknown as Locator;
+
+  return { locator, page, pressed, typed };
+}
+
+describe('fillContentEditable', () => {
+  it('clears the field and types each paragraph with a double-Enter break', async () => {
+    const { locator, typed, pressed } = mockLocator();
+
+    await fillContentEditable(locator, 'First bullet\n\nSecond bullet\n\nThird bullet');
+
+    expect(typed).toEqual(['First bullet', 'Second bullet', 'Third bullet']);
+    // Select-all + delete before typing.
+    expect(pressed[0]).toMatch(/Meta\+A|Control\+A/);
+    expect(pressed[1]).toBe('Backspace');
+    // Two Enters between paragraphs, none trailing after the last one.
+    const enters = pressed.filter((k) => k === 'Enter');
+    expect(enters).toHaveLength(4); // 2 breaks * 2 Enters each
+  });
+
+  it('types a single Enter per break when paragraphBreak is "enter"', async () => {
+    const { locator, pressed } = mockLocator();
+
+    await fillContentEditable(locator, 'A\n\nB', { paragraphBreak: 'enter' });
+
+    const enters = pressed.filter((k) => k === 'Enter');
+    expect(enters).toHaveLength(1);
+  });
+
+  it('ignores blank/whitespace-only paragraphs', async () => {
+    const { locator, typed } = mockLocator();
+
+    await fillContentEditable(locator, 'A\n\n\n\nB\n\n   \n\nC');
+
+    expect(typed).toEqual(['A', 'B', 'C']);
+  });
+});
diff --git a/src/browser/richText.ts b/src/browser/richText.ts
new file mode 100644
index 0000000..9ec7698
--- /dev/null
+++ b/src/browser/richText.ts
@@ -0,0 +1,57 @@
+import type { Locator } from '@playwright/test';
+import { createLogger, type Logger } from '../logging/logger.js';
+
+export interface FillContentEditableOptions {
+  /**
+   * How to render a paragraph break between `value`'s blank-line-separated
+   * paragraphs: 'double-enter' (default) types Enter twice, which is what most
+   * rich-text widgets (incl. LinkedIn's) need to render an actual blank line
+   * instead of collapsing consecutive lines into inline text; 'enter' types it
+   * once for widgets that already treat a single Enter as a new block.
+   */
+  paragraphBreak?: 'double-enter' | 'enter';
+  /** Per-keystroke delay in ms passed to `page.keyboard.type` (default 4). */
+  typeDelay?: number;
+  timeout?: number;
+  logger?: Logger;
+}
+
+/**
+ * Type `value` into a `contenteditable` rich-text field via real keyboard
+ * events, splitting on blank lines (`\n\n`) so multi-paragraph/bulleted text
+ * renders as separate blocks instead of collapsing into one run.
+ *
+ * `Locator.fill()` only works on `<input>`/`<textarea>` — it's a no-op or
+ * throws on `contenteditable` divs, which is what many CMS/social-profile
+ * rich-text fields actually use (LinkedIn's About and Description fields,
+ * for example, look like a `<textarea>` visually but aren't one).
+ */
+export async function fillContentEditable(
+  locator: Locator,
+  value: string,
+  options?: FillContentEditableOptions,
+): Promise<void> {
+  const log = options?.logger ?? createLogger({ name: 'fillContentEditable' });
+  await locator.waitFor({ state: 'visible', timeout: options?.timeout ?? 20_000 });
+  const page = locator.page();
+  await locator.click();
+  await page.keyboard.press(process.platform === 'darwin' ? 'Meta+A' : 'Control+A');
+  await page.keyboard.press('Backspace');
+
+  const paragraphs = value
+    .split(/\n\n+/)
+    .map((p) => p.trim())
+    .filter(Boolean);
+  const delay = options?.typeDelay ?? 4;
+
+  for (let i = 0; i < paragraphs.length; i++) {
+    await page.keyboard.type(paragraphs[i]!, { delay });
+    if (i < paragraphs.length - 1) {
+      await page.keyboard.press('Enter');
+      if (options?.paragraphBreak !== 'enter') {
+        await page.keyboard.press('Enter');
+      }
+    }
+  }
+  log.debug('fillContentEditable done', { paragraphs: paragraphs.length });
+}
diff --git a/src/index.ts b/src/index.ts
index 7d43680..ca8b227 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -35,6 +35,13 @@ export {
   dedupeNetworkErrors,
   globToRegExp,
   responseMatchesFilter,
+  COMMON_NOISE_PATTERNS,
+  byAriaLabel,
+  clickByAriaLabel,
+  withDialog,
+  fillContentEditable,
+  runPersistentSession,
+  isBrowserCrashError,
   type ClickOptions,
   type FillOptions,
   type GotoOptions,
@@ -43,6 +50,12 @@ export {
   type InterceptedNetworkCall,
   type NetworkError,
   type NetworkErrorMonitorOptions,
+  type ByAriaLabelOptions,
+  type WithDialogHandlers,
+  type WithDialogOptions,
+  type FillContentEditableOptions,
+  type PersistentSessionOptions,
+  type LaunchedSession,
 } from './browser/index.js';
 
 export {
-- 
2.49.1