# Halyard: reconstructing Shadow cloud PC streaming on handhelds

> Halyard reimplements the Shadow cloud PC streaming protocol for Nintendo Switch and PS Vita homebrew. It authenticates to a subscribed user's machine, negotiates over TLS, and carries encrypted video, audio, input and cursor channels; the consoles use hardware video decoding. The repository records protocol findings and platform-specific limits.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-08
- Original resource: <https://github.com/Wasabules/Halyard>
- Primary source: <https://github.com/Wasabules/Halyard/blob/ab7754bee730903afe7ed5d672feecc2542081d5/README.md>
- Catalog page: <https://awesomerea.org/resources/halyard-case/>
- Record JSON: <https://awesomerea.org/resources/halyard-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/halyard-case/index.md)

## Requirements & limits

- **Prerequisites:** An active Shadow subscription and a Switch running homebrew or a PS Vita with HENkaku or h-encore.
- **Limits:** The Vita port is described as early; clipboard and microphone channels are not implemented.
- **License:** GPL-3.0-or-later license.

## Primary sources

1. <https://github.com/Wasabules/Halyard/blob/ab7754bee730903afe7ed5d672feecc2542081d5/README.md>
2. <https://github.com/Wasabules/Halyard/blob/ab7754bee730903afe7ed5d672feecc2542081d5/docs/INSTALL.md>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.