docs(skills): add Cosmos transfer inference skill

[chrisvoncsefalvay]

Teaches agents how to run Cosmos3 transfer inference with one or more conditioning controls (blur, edge, depth and so on).

[lfengad]

@trungtpham could have a review and check? THX

[lfengad]

Thanks a lot for putting this together! 🙏 This is genuinely useful — docs/inference.md has zero transfer coverage today, so this skill basically becomes the only documentation we have for the feature. The structure, frontmatter, and the .agents + .claude duplication all match our existing skills, so that part is spot on.

I went through it line by line against transfer.py / args.py / inference.py, and most of the "Source facts" check out exactly — hint enum ordering, weight normalization, single-hint-only defaults, the output filenames, the no-mixing / no-batching asserts, JSON prompt compaction, and single-frame metadata stripping are all accurate. Nice work on that.

I did bump into a handful of things while reading, left inline below. Two of them (the negative_prompt_file paths and the aspect_ratio rule) I think would actually break or silently mislead someone following the skill, so those are the ones I'd love to see addressed. The rest are smaller / take-them-or-leave-them.

One housekeeping note: I only commented on the .agents/ copy to avoid duplicating everything, but every comment applies to the identical .claude/skills/cosmos3-transfer-inference/SKILL.md too.

Happy to help with any of these if it's easier — just let me know!

[chrisvoncsefalvay]

Thank you again for such a thoughtful review, @lfengad. I’ve addressed all 14 threads in f7d0c29. The two skill copies remain byte-identical, all fenced JSON examples parse, and the targeted pre-commit and link checks pass.

Beyond the narrowly required correction to the existing parallelism guidance, I have not added a broader transfer section to docs/inference.md because I did not want to overburden this PR. If you think that documentation would be better added here than in a separate PR, I am happy to document transfer properly in this PR.