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SkillOpt vs ray

SkillOpt and ray share 3 technologies: azure-identity, openpyxl, and azure-core. Both are written in Python.

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What they share and what sets them apart

microsoft

SkillOpt

SkillOpt is a text-space optimizer that trains reusable natural-language skills for frozen LLM agents through trajectory-driven edits, validation-gated updates, and deployable best_skill.md artifacts.

Python18.9kRead on November 6, 2026, at commit eb959c3What is SkillOpt built with?

Only in SkillOpt

In common

ray-project

ray

Ray is an AI compute engine. Ray consists of a core distributed runtime and a set of AI Libraries for accelerating ML workloads.

Python44.3kRead on November 13, 2026, at commit de4c576What is ray built with?

Only in ray

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
SkillOpt89,655 lines written147 code files
ray1,566,356 lines written2,810 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
SkillOpt38.6% of its commits signed by AIWith Claude Code, GitHub Copilot, Codex, Devin, and Cursor
ray3.7% of its commits signed by AIWith Claude Code, Gemini CLI, GitHub Copilot, Cursor, and Codex
ActivityFrom GitHub and its history, on the day SeeRepo read it.
SkillOptLast push November 5, 2026474 commits18,915 stars
rayLast push November 13, 202632,468 commits44,282 stars
TestsThe files that test the code, and the share of code files a test imports.
SkillOpt104 test files55.8% of its code files have a test that imports them
ray2,208 test files9.4% of its code files have a test that imports them

Frequently asked questions

Which is bigger, SkillOpt or ray?
ray, with 1,566,356 lines written; SkillOpt has 89,655.

The proof: ray-project/ray's code at commit de4c576

Which has more GitHub stars, SkillOpt or ray?
ray, with 44,282 stars; SkillOpt has 18,915.

The proof: ray-project/ray on GitHub

Which has more tests, SkillOpt or ray?
ray, with 2,208 test files; SkillOpt has 104.

The proof: ray-project/ray's code at commit de4c576

Which was updated more recently, SkillOpt or ray?
ray: its last push was on November 13, 2026, and SkillOpt's on November 5, 2026.

The proof: ray-project/ray's commits on GitHub

Which has more commits signed by AI, SkillOpt or ray?
SkillOpt: an AI signed 38.6% of its commits, with Claude Code, GitHub Copilot, Codex, Devin, and Cursor; in ray, 3.7%.

The proof: the commits each tool signed in microsoft/SkillOpt

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