Case study

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.

Targets: Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C1 partial scope or analysis entry

Stars: 3
Last commit: 2026-09-26
Language: C
License (GitHub): GPL-3.0

GitHub data as of 2026-11-10

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Evidence

Demo screenshot from the project's public documentation

Observed: Code, documentation, download and demo observed; a full-reconstruction candidate for manual Class 0 review.
Scope: Partial
Checked: 2026-11-08

How evidence classes are assigned

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.

Cite

BibTeX

@misc{halyard-case,
  title = {{Halyard: reconstructing Shadow cloud PC streaming on handhelds}},
  howpublished = {\url{https://github.com/Wasabules/Halyard}},
  url = {https://github.com/Wasabules/Halyard},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/halyard-case/}}
}

Plain text

Halyard: reconstructing Shadow cloud PC streaming on handhelds. https://github.com/Wasabules/Halyard (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/halyard-case/

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About this entry

The description was reviewed against primary sources.

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Primary sources

README.md GitHub · Wasabules/Halyard · Revision ab7754b
docs/INSTALL.md GitHub · Wasabules/Halyard · Revision ab7754b