Add darklang.io

[pbiggar]

Checklist of required steps

• Description of Organization
• Robust Reason for PSL Inclusion
• DNS verification via dig
• Run Syntax Checker (make test)
• Each domain listed in the PRIVATE section has and shall maintain at least two years remaining on registration, and we shall keep the _PSL txt record in place in the respective zone(s) in the affected section
  Submitter affirms the following:
  • We are listing any third-party limits that we seek to work around in our rationale such as those between IOS 14.5+ and Facebook (see Issue #1245 as a well-documented example)
  • This request was not submitted with the objective of working around other third-party limits
  • The Guidelines were carefully read and understood, and this request conforms
  • The submission follows the guidelines on formatting and sorting

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(Link: about propagation/expectations)

• Yes, I understand. I could break my organization's website cookies etc. and the rollback timing, etc is acceptable. Proceed.

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Description of Organization

Organization Website: https://darklang.com/

Darklang is a holistic programming language and infrastructure, for building backend web services. We are the company building Darklang.

I'm a co-founder and CTO of Darklang.

Reason for PSL Inclusion

We have an existing domain on the PSL, and intend to migrate usage of that domain to a new domain for marketing/product reasons (aka it looks nicer).

Number of users this request is being made to serve: ~1000

• We provide each customer with a unique subdomain of darklang.io
• We want our customers' apps to be isolated from each other (cookies, etc.)
• We want to prevent setting cookies on the apex domains

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• We have extended registration longer than 2 years.
• We are not attempting to work around any 3rd party limits.
• We previously added builtwithdark.com.

DNS Verification via dig

dig +short TXT _psl.darklang.io
"https://github.com/publicsuffix/list/pull/1880"

Results of Syntax Checker (make test)

[simon-friedberger]

I've run the tests as well. They pass.

[dnsguru]

This is still a draft - why was it placed in To-Do/Reviewed? @simon-friedberger

@pbiggar we will review once this is no longer 'DRAFT' and we have cycles

[pbiggar]

I'm unclear why this closed, afaict it wasn't merged?

[simon-friedberger]

It was waiting-followup, then it was about-to-timeout and you never reacted. I believe the original problem that @dnsguru flagged was that it was still in draft.

[pbiggar]

Oh, I didn't understand that that was on me. My bad! Thanks for clarifying. I've removed DRAFT status, this is ready to go on my end.

[simon-friedberger]

• Expiration (Note: Must STAY >2y at all times)
  • darklang.io expires 2026-10-12
• DNS _psl entries (Note: Must STAY in place)
• Tests pass
• Sorting
• Reasoning/Organization description