[FIG(short list)[ [7] 
- [CODE[psgix.io]]
- [CODE[psgix.input.buffered]]
- [CODE[psgix.harakiri]]
- [CODE[psgix.harakiri.commit]]
- [CODE[psgix.logger]]
- [CODE[psgix.cleanup]]
- [CODE[psgix.cleanup.handlers]]
- [CODE[psgix.exit_guard]]
]FIG]

[1] [CITE[PSGI::Extensions - PSGI extentions - metacpan.org]]
([TIME[2012-03-10 01:48:20 +09:00]] 版)
<https://metacpan.org/module/PSGI::Extensions>

[2] [CITE[psgi-specs/PSGI.pod at master · miyagawa/psgi-specs]]
([TIME[2012-05-31 16:50:29 +09:00]] 版)
<https://github.com/miyagawa/psgi-specs/blob/master/PSGI.pod>

[3] [CITE[Feersum - search.cpan.org]]
( ([TIME[2014-10-21 03:49:05 +09:00]] 版))
<http://search.cpan.org/dist/Feersum/lib/Feersum.pm#PSGI_extensions>

[4] [CITE[Twiggy::Prefork をリリースしました - blog.nomadscafe.jp]]
( ([TIME[2014-10-14 16:12:59 +09:00]] 版))
<http://blog.nomadscafe.jp/2012/05/twiggyprefork.html>

[5] [CITE[Twiggy::Prefork - search.cpan.org]]
( ([TIME[2014-10-21 04:00:27 +09:00]] 版))
<http://search.cpan.org/dist/Twiggy-Prefork/lib/Twiggy/Prefork.pm#PSGI_extensions>

[6] [CITE@en[psgi-specs/Extensions.pod at master · plack/psgi-specs]]
([TIME[2017-06-07 14:24:45 +09:00]])
<https://github.com/plack/psgi-specs/blob/master/PSGI/Extensions.pod>