From 423365caaeaec11637ec7a176aab20c9caf58106 Mon Sep 17 00:00:00 2001 From: "Tommy D. Rossi" Date: Thu, 15 Jan 2026 13:26:33 +0100 Subject: [PATCH] resize screenshots with sharp to optimize Claude token usage --- playwriter/package.json | 3 + playwriter/src/aria-snapshot.ts | 38 +++-- pnpm-lock.yaml | 279 ++++++++++++++++++++++++++++++++ 3 files changed, 307 insertions(+), 13 deletions(-) diff --git a/playwriter/package.json b/playwriter/package.json index 949b8df..aec9cfd 100644 --- a/playwriter/package.json +++ b/playwriter/package.json @@ -56,5 +56,8 @@ "user-agents": "^1.1.669", "ws": "^8.18.3", "zod": "^3" + }, + "optionalDependencies": { + "sharp": "^0.34.5" } } diff --git a/playwriter/src/aria-snapshot.ts b/playwriter/src/aria-snapshot.ts index bb48fec..d841cfe 100644 --- a/playwriter/src/aria-snapshot.ts +++ b/playwriter/src/aria-snapshot.ts @@ -1,7 +1,6 @@ import type { Page, Locator, ElementHandle } from 'playwright-core' import fs from 'node:fs' import path from 'node:path' -import os from 'node:os' export interface AriaRef { role: string @@ -579,24 +578,37 @@ export async function screenshotWithAccessibilityLabels({ page, interactiveOnly } const screenshotPath = path.join(tmpDir, filename) - // Get actual viewport size (innerWidth/innerHeight, not outer window size) - const viewport = await page.evaluate('(() => ({ width: window.innerWidth, height: window.innerHeight }))()') as { width: number; height: number } + // Get viewport size to clip screenshot to visible area + const viewport = await page.evaluate('({ width: window.innerWidth, height: window.innerHeight })') as { width: number; height: number } - // Take screenshot clipped to actual viewport (excludes browser chrome) - // Limit to 2000px max to avoid Claude API rejection for many-image requests - const MAX_SCREENSHOT_DIMENSION = 2000 - const buffer = await page.screenshot({ + // Take viewport screenshot with scale: 'css' to ignore device pixel ratio + const rawBuffer = await page.screenshot({ type: 'jpeg', quality: 80, scale: 'css', - clip: { - x: 0, - y: 0, - width: Math.min(viewport.width, MAX_SCREENSHOT_DIMENSION), - height: Math.min(viewport.height, MAX_SCREENSHOT_DIMENSION), - }, + clip: { x: 0, y: 0, width: viewport.width, height: viewport.height }, }) + // Resize to fit within Claude's optimal limits: + // - Max 1568px on any edge (larger gets auto-resized by Claude, adding latency) + // - Target ~1.15 megapixels for optimal token usage (~1,533 tokens) + // Token formula: tokens = (width * height) / 750 + const buffer = await Promise.resolve() + .then(() => import('sharp')) + .then(async ({ default: sharp }) => { + const MAX_DIMENSION = 1568 + return sharp(rawBuffer) + .resize({ + width: MAX_DIMENSION, + height: MAX_DIMENSION, + fit: 'inside', // Scale down to fit, preserving aspect ratio + withoutEnlargement: true, // Don't upscale small images + }) + .jpeg({ quality: 80 }) + .toBuffer() + }) + .catch(() => rawBuffer) // sharp not available, Claude will auto-resize + // Save to file fs.writeFileSync(screenshotPath, buffer) diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml index a11e772..9482278 100644 --- a/pnpm-lock.yaml +++ b/pnpm-lock.yaml @@ -97,6 +97,9 @@ importers: posthtml-beautify: specifier: ^0.7.0 version: 0.7.0 + sharp: + specifier: ^0.34.5 + version: 0.34.5 string-dedent: specifier: ^3.0.2 version: 3.0.2 @@ -672,6 +675,9 @@ packages: resolution: {integrity: sha512-Vd/9EVDiu6PPJt9yAh6roZP6El1xHrdvIVGjyBsHR0RYwNHgL7FJPyIIW4fANJNG6FtyZfvlRPpFI4ZM/lubvw==} engines: {node: '>=18'} + '@emnapi/runtime@1.8.1': + resolution: {integrity: sha512-mehfKSMWjjNol8659Z8KxEMrdSJDDot5SXMq00dM8BN4o+CLNXQ0xH2V7EchNHV4RmbZLmmPdEaXZc5H2FXmDg==} + '@esbuild/aix-ppc64@0.21.5': resolution: {integrity: sha512-1SDgH6ZSPTlggy1yI6+Dbkiz8xzpHJEVAlF/AM1tHPLsf5STom9rwtjE4hKAF20FfXXNTFqEYXyJNWh1GiZedQ==} engines: {node: '>=12'} @@ -1151,6 +1157,143 @@ packages: '@iarna/toml@2.2.5': resolution: {integrity: sha512-trnsAYxU3xnS1gPHPyU961coFyLkh4gAD/0zQ5mymY4yOZ+CYvsPqUbOFSw0aDM4y0tV7tiFxL/1XfXPNC6IPg==} + '@img/colour@1.0.0': + resolution: 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'@img/sharp-linux-x64@0.34.5': + optionalDependencies: + '@img/sharp-libvips-linux-x64': 1.2.4 + optional: true + + '@img/sharp-linuxmusl-arm64@0.34.5': + optionalDependencies: + '@img/sharp-libvips-linuxmusl-arm64': 1.2.4 + optional: true + + '@img/sharp-linuxmusl-x64@0.34.5': + optionalDependencies: + '@img/sharp-libvips-linuxmusl-x64': 1.2.4 + optional: true + + '@img/sharp-wasm32@0.34.5': + dependencies: + '@emnapi/runtime': 1.8.1 + optional: true + + '@img/sharp-win32-arm64@0.34.5': + optional: true + + '@img/sharp-win32-ia32@0.34.5': + optional: true + + '@img/sharp-win32-x64@0.34.5': + optional: true + '@inquirer/external-editor@1.0.3(@types/node@25.0.3)': dependencies: chardet: 2.1.1 @@ -9669,6 +9917,37 @@ snapshots: setprototypeof@1.2.0: {} + sharp@0.34.5: + dependencies: + '@img/colour': 1.0.0 + detect-libc: 2.1.2 + semver: 7.7.3 + optionalDependencies: + '@img/sharp-darwin-arm64': 0.34.5 + '@img/sharp-darwin-x64': 0.34.5 + '@img/sharp-libvips-darwin-arm64': 1.2.4 + 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