Miguel Ángel
4834de37f4
`hyperframes lint --json` wrote the JSON payload with console.log() and then immediately called process.exit(). process.exit() terminates the process before Node flushes an asynchronously-buffered stdout, which is what a non-TTY (piped) stdout is — so `hyperframes lint --json | tee`, `> out.json`, or any agent/CI capture silently lost the entire payload on Windows (reported on 0.7.31 non-TTY). The same console.log-then-exit pattern was on all four exit sites (both --json branches and the human-readable + thrown-error paths), so any of them could truncate. Fix: set process.exitCode and return, letting run() unwind so Node drains stdout before exiting with the code. This is exactly the pattern the other commands (publish/transcribe/upgrade/play/present) already use; lint was the outlier still calling process.exit() after writing. Test: new lint.test.ts drives the command's run() with mocked lintProject/resolveProject and a process.exit spy that throws if called. Covers the --json-with-errors, --json-clean, --json-thrown, and human-readable paths — each asserts process.exit is never called and the correct exitCode is set. Fails against the pre-fix code (the spy throws on the first process.exit).
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