browser-proof

name	browser-proof
description	Capture browser screenshots of Perch UI for visual verification. Use after implementing UI changes to prove they work, or when asked to verify, screenshot, or capture browser proof of a feature.

Browser Proof — Playwright Screenshots for Perch

Capture screenshots of the running Perch app to verify UI changes. Uses Playwright (installed globally, v1.58+).

Quick Reference

Write a .mjs script to /tmp/, run with node. Read screenshots with the Read tool (it renders images).

Playwright Module Resolution

On this machine, playwright is installed globally, but node /tmp/script.mjs may not resolve import { chromium } from 'playwright'.

Use one of these approaches:

1. Import Playwright from its absolute global path:

import { chromium } from '/Users/marcus/.local/share/mise/installs/node/22.22.0/lib/node_modules/playwright/index.mjs';

2. If that path changes, discover it first:

which playwright
npm root -g

Then import from <npm root -g>/playwright/index.mjs.

Prefer the absolute import path in proof scripts. It worked for live browser capture on 2026-03-15.

Auth Pattern

import { chromium } from '/Users/marcus/.local/share/mise/installs/node/22.22.0/lib/node_modules/playwright/index.mjs';
import { readFileSync } from 'fs';

const TOKEN = readFileSync('/Users/marcus/.config/perch/auth.token', 'utf8').trim();
const BASE = 'http://localhost:8090';  // production
const DEV  = 'http://localhost:5174';  // vite dev (port may vary — check npm run dev output)

const browser = await chromium.launch();
const ctx = await browser.newContext({ viewport: { width: 1400, height: 900 } });
const page = await ctx.newPage();

// Login via API — sets session cookie on the context
await page.request.post(`${BASE}/api/login/token`, { data: { token: TOKEN } });

Navigate + Screenshot

// Use DEV base for latest code (HMR), BASE for production build
await page.goto(`${DEV}/td?project=perch&board=bd-all-issues#board`);
await page.waitForTimeout(3000);
await page.screenshot({ path: '/tmp/proof-01-board.png' });

Interact

// Click element
await page.locator('text=Issue title').first().click();
await page.waitForTimeout(2000);

// Check visibility (with timeout + catch for safety)
const el = page.locator('.my-class').first();
const visible = await el.isVisible({ timeout: 3000 }).catch(() => false);

// Count elements
const count = await page.locator('.my-class').count();

// Type text
await page.keyboard.type('hello');

// Keyboard shortcuts
await page.keyboard.press('Escape');
await page.keyboard.press('Meta+Enter');

// Scroll
await page.evaluate(() => {
  document.querySelector('.scroll-container')?.scrollTo(0, );
});

Cleanup

await browser.close();

Perch URL Patterns

Page	URL
Tasks overview	/td
Project board	/td?project=perch&board=bd-all-issues#board
List view	/td?project=perch&board=bd-all-issues#list
Helm	/helm
Workspace	/workspace
Briefings	/briefings

To open a detail panel, click a board card or table row — the panel slides in from the right.

Rules

1. Always use /tmp/ for screenshot files — never write to the repo.
2. Use the Read tool to view screenshots — it renders images inline.
3. Wait after navigation/clicks — waitForTimeout(2000-3000) for SPA rendering.
4. Use .catch(() => false) on visibility checks — prevents test crashes.
5. Dev server for latest code — npm run dev output shows the port. The API still hits localhost:8090.
6. Production server for deployed builds — restart ./perch after make build to pick up changes.

Example: Full Proof Script

import { chromium } from '/Users/marcus/.local/share/mise/installs/node/22.22.0/lib/node_modules/playwright/index.mjs';
import { readFileSync } from 'fs';

const TOKEN = readFileSync('/Users/marcus/.config/perch/auth.token', 'utf8').trim();
const browser = await chromium.launch();
const ctx = await browser.newContext({ viewport: { width: 1400, height: 900 } });
const page = await ctx.newPage();

await page.request.post('http://localhost:8090/api/login/token', { data: { token: TOKEN } });
await page.goto('http://localhost:5174/td?project=perch&board=bd-all-issues#board');
await page.waitForTimeout(3000);
await page.screenshot({ path: '/tmp/proof-01.png' });

// Click first issue
await page.locator('tbody tr').first().click();
 page.();
 page.({ :  });

 browser.();

Then: node /tmp/my-proof.mjs and use Read tool on /tmp/proof-*.png.