## What Two correctness fixes to `packages/cli/src/browser/manager.ts` so the CLI picks the right Chrome binary for any perf path that depends on `chrome-headless-shell`: 1. **Also scan the puppeteer-managed cache.** `findFromCache` now reads from both `~/.cache/hyperframes/chrome` (the CLI's own managed cache) and `~/.cache/puppeteer/chrome-headless-shell/<version>/<platform-dir>/chrome-headless-shell` (the path layout that the engine's `resolveHeadlessShellPath` already reads from). When `chrome-headless-shell` is present in either cache, it now wins over system Chrome. 2. **Warn when falling through to a non-`chrome-headless-shell` system binary on Linux.** A single one-time `console.warn` explains the perf consequence and points the user at `npx @puppeteer/browsers install chrome-headless-shell`. Linux-scoped because the BeginFrame perf path is Linux-only. ## Why Discovered in a recent spike on the BeginFrame perf path. On a clean install, the CLI's hyperframes-managed cache (`~/.cache/hyperframes/chrome`) is empty, so `findFromCache` returns `undefined`. The CLI then falls through to `findFromSystem()` and picks `/usr/bin/google-chrome`, exporting it to the engine via `PRODUCER_HEADLESS_SHELL_PATH` in `render.ts`. The engine receives that path, sees it's already set, and skips its own correct `~/.cache/puppeteer/chrome-headless-shell` scan. Regular Chrome (147+) has dropped `HeadlessExperimental.enable`. The engine's BeginFrame probe correctly catches this and silently falls back to screenshot mode — but the operator sees no signal, so any user who installed `chrome-headless-shell` via `npx @puppeteer/browsers install` (the standard puppeteer flow) silently loses the perf path. This is a "two codepaths know about 'the chrome we ship' but look in different places" bug. The fix collapses them. ## How - `findFromCache` now consults both caches. Hyperframes-managed cache wins when both contain a binary (preserves existing behavior). - New `findFromPuppeteerCache` mirrors `resolveHeadlessShellPath` from `packages/engine/src/services/browserManager.ts` — same path layout, same newest-first version sort. A comment in both files notes they need to move together if puppeteer ever changes the on-disk layout. - `warnSystemFallbackOnce` is gated on `process.platform === "linux"` and on the binary name (`basename` of the path being `chrome-headless-shell`/`.exe`). One-shot latch so a long-running `hyperframes studio` process isn't spammed. Exported test-reset helper `_resetSystemFallbackWarnForTests` for the unit tests. No public-API changes. `findBrowser`, `ensureBrowser`, `clearBrowser`, `setBrowserPath` all keep the same signatures. ## Test plan - [x] Unit tests added (`packages/cli/src/browser/manager.test.ts`, 7 tests): - cache hit on hyperframes dir - cache hit on puppeteer dir (the new path) - newest-version preference when multiple versions are cached - system fallback + Linux warning emitted - no warning when the resolved path is itself `chrome-headless-shell` (e.g. `HYPERFRAMES_BROWSER_PATH` override) - no warning on macOS (Linux-only perf path) - one-time warning idempotency across repeated `findBrowser()` calls - [x] `bun run --filter @hyperframes/cli typecheck` — passes - [x] `bun run --filter @hyperframes/cli test` — 305/305 passing - [x] `bun run --filter @hyperframes/cli build` — passes - [ ] Manual smoke on a Linux host with chrome-headless-shell in the puppeteer cache (skipped — sandbox already has both binaries and the unit tests cover the resolution logic deterministically; reviewers welcome to verify) — Vai
hyperframes
CLI for creating, previewing, and rendering HTML video compositions.
Install
npm install -g hyperframes
Or use directly with npx:
npx hyperframes <command>
Requirements: Node.js >= 22, FFmpeg
Commands
init
Scaffold a new Hyperframes project from a template:
npx hyperframes init my-video
cd my-video
preview
Start the live preview studio in your browser:
npx hyperframes preview
# Studio running at http://localhost:3002
npx hyperframes preview --port 4567
render
Render a composition to MP4:
npx hyperframes render ./my-composition.html -o output.mp4
lint
Validate your Hyperframes HTML:
npx hyperframes lint ./my-composition
npx hyperframes lint ./my-composition --json # JSON output for CI/tooling
npx hyperframes lint ./my-composition --verbose # Include info-level findings
By default only errors and warnings are shown. Use --verbose to also display informational findings (e.g., external script dependency notices). Use --json for machine-readable output with errorCount, warningCount, infoCount, and a findings array.
compositions
List compositions found in the current project:
npx hyperframes compositions
benchmark
Run rendering benchmarks:
npx hyperframes benchmark ./my-composition.html
doctor
Check your environment for required dependencies (Chrome, FFmpeg, Node.js):
npx hyperframes doctor
browser
Manage the bundled Chrome/Chromium installation:
npx hyperframes browser
info
Print version and environment info:
npx hyperframes info
docs
Open the documentation in your browser:
npx hyperframes docs
upgrade
Check for updates and show upgrade instructions:
npx hyperframes upgrade
npx hyperframes upgrade --check --json # machine-readable for agents
Documentation
Full documentation: hyperframes.heygen.com/packages/cli
Related packages
@hyperframes/core— types, parsers, frame adapters@hyperframes/engine— rendering engine@hyperframes/producer— render pipeline@hyperframes/studio— composition editor UI