flutter_flutter/specs/README.md

The Sky Environment

The main files loaded by the Sky environment are Sky files, though they can refer to binary resources like images and fonts.

Sky files

Conventional MIME type: text/sky, though this type is neither necessary nor sufficient to indicate that a file is a Sky file; only the signature matters for type dispatch of Sky files.

Conventional extension: .sky

Signatures:

For application files, one of the following:

• 23 21 6d 6f 6a 6f 20 6d 6f 6a 6f 3a 73 6b 79 0a ("#!mojo mojo:sky\n")
• 23 21 6d 6f 6a 6f 20 6d 6f 6a 6f 3a 73 6b 79 0d ("#!mojo mojo:sky\r")
• 23 21 6d 6f 6a 6f 20 6d 6f 6a 6f 3a 73 6b 79 20 ("#!mojo mojo:sky ")

For module files, one of the following:

• 53 4b 59 20 4d 4f 44 55 4c 45 0a ("SKY MODULE\n")
• 53 4b 59 20 4d 4f 44 55 4c 45 0d ("SKY MODULE\r")
• 53 4b 59 20 4d 4f 44 55 4c 45 20 ("SKY MODULE ")

Notes

magical imports:
  the core mojo fabric JS API   sky:mojo:fabric:core
  the asyncWait/cancelWait mojo fabric JS API (interface to IPC thread)  sky:mojo:fabric:ipc
  the mojom for the shell, proxying through C++ so that the shell pipe isn't exposed  sky:mojo:shell
  the sky API  sky:core
  the sky debug symbols for private APIs  sky:debug