feat: add Just language support

[mvanhorn]

Summary

Adds Just (justfile task runner) as a recognized language in onefetch. Just files are now detected and displayed with a J-shaped ASCII logo in amber.

Changes

• languages.yaml: Added Just entry between Julia and Jupyter (alphabetical). Includes ASCII art, amber color (#F5A623), and ansi yellow mapping.

Testing

YAML validation passes.

Closes #1557

This contribution was developed with AI assistance (Claude Code).

[spenserblack]

This logo looks like it has been stretched vertically. Is there a justification for why the "J" is so tall and thin?

This contribution was developed with AI assistance (Claude Code).

Assuming the AI made the logo, I'm guessing that it treated each character as a 1x1 pixel. That's not exactly accurate, usually, as monospace font characters are usually rendered as taller than they are wide.

Example:

This will probably look like a rectangle, even though it's 3x3 "pixels":

@@@
@@@
@@@

This will probably look closer to a square:

@@@@@@
@@@@@@
@@@@@@

---

Feel free to correct me if my assumptions are wrong.

[spenserblack]

I try not to be unnecessarily anti-AI, but after looking at your contributions I get the feeling that you're scanning popular repositories and using LLM content to get yourself added to the contributor list. What concerned me was stumbling on a PR in rust-lang/rust that got flagged as spam.

I don't want to be hypocritical, as I also used to try to get myself added to a bunch of contributor lists in my early days on GitHub (though without LLMs since they weren't widely available yet).

So I'm not judging you here, and I appreciate the potential improvement. But, if this PR was made by asking an AI to pick out an issue and make a PR for it, as I suspect, I'm considering closing this. The reason is that I think we should leave space for PR authors who are one of these:

• users of onefetch who want to see this tool improve
• users of the newly supported language (in this case Just)
• users who want to express artistic creativity by designing ASCII art

I don't feel that LLM-generated ASCII art from someone who, AFAICT, doesn't even use the Just build system is the ideal contribution.

The last thing I want to do is take over this project's culture and stance on AI. Pinging @o2sh, please let me know if you feel differently.

[o2sh]

I don't mind the use of LLMs, but not blindly. As @spenserblack pointed out, they are especially bad at generating ASCII art.

@mvanhorn, this should be a fairly easy logo to recreate in ASCII manually:

[mvanhorn]

I try not to be unnecessarily anti-AI, but after looking at your contributions I get the feeling that you're scanning popular repositories and using LLM content to get yourself added to the contributor list. What concerned me was stumbling on a PR in rust-lang/rust that got flagged as spam.

I don't want to be hypocritical, as I also used to try to get myself added to a bunch of contributor lists in my early days on GitHub (though without LLMs since they weren't widely available yet).

So I'm not judging you here, and I appreciate the potential improvement. But, if this PR was made by asking an AI to pick out an issue and make a PR for it, as I suspect, I'm considering closing this. The reason is that I think we should leave space for PR authors who are one of these:

• users of onefetch who want to see this tool improve
• users of the newly supported language (in this case Just)
• users who want to express artistic creativity by designing ASCII art

I don't feel that LLM-generated ASCII art from someone who, AFAICT, doesn't even use the Just build system is the ideal contribution.

The last thing I want to do is take over this project's culture and stance on AI. Pinging @o2sh, please let me know if you feel differently.

Learnings all across the board here.. appreciate you diving in, being thoughtful. These are my early days on github too, so appreciate that you used to do this.

I've been working with the rust team offline, they are 100% anti-AI, officially. I messed up there.

diving into all this feedback - back soon !

[spenserblack]

• CI is failing due to ASCII width and height constraints enforced at compile time
• The "strokes" of each letter are different widths
  • The lines of the "u" are 3 characters wide
  • The lines of the "t" are 6 characters wide
• Could you please explain why there appears to be an accent over the "u"?

I would highly encourage reviewing your contribution manually before pushing up new code. Ideally, you should test locally by running cargo test so that you can see any potential issues before you push up new code, too. Or at least move this to a "draft" status if you're still tinkering with the ASCII art and you're not ready for a review.

[spenserblack]

What is this? "Júst"?

[mvanhorn]

@o2sh Thanks for the reference. Rewrote the logo from scratch using figlet -f standard "just" - same style as the existing Jupyter logo in onefetch. Built and tested against a repo with a Justfile:

Force-pushed the fix. Let me know if the proportions need any more work.

[spenserblack]

LGTM

[o2sh]

a small suggestion to make it look closer to the original logo :

Suggested change

	Just:
	type: programming
	ascii: |
	{0} _ _
	{0} (_)_ _ ___| |_
	{0} | | | | / __| __|
	{0} | | |_| \__ \ |_
	{0} _/ |\__,_|___/\__|
	{0} |__/
	colors:
	ansi:
	- yellow
	hex:
	- "#F5A623"
	chip: "#F5A623"
	Just:
	type: programming
	ascii: |
	{0} db ,d
	{0} "" MM
	{0} MMMMMM MM MM ,pP"Ybd MMMMMM
	{0} MM MM MM 8I `" MM
	{0} MM MM MM `YMMMa. MM
	{0} MM MM MM L. I8 MM,
	{0} MM `Mbod"YM M9mmmP' "Mbmo
	{0}M. ,MM
	{0}"MMMMM"
	colors:
	ansi:
	- white
	chip: "#384d54"

[mvanhorn]

Applied your suggestion in aa7551e. The toilet-style art fits the constraints at 34x9.

[o2sh]

I’m closing this. Later today, I’ll add AI_POLICY.md and update the CONTRIBUTING.md to prevent this in the future.