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SkillOpt vs onyx

SkillOpt and onyx share 4 technologies: OpenAI, 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

onyx-dot-app

onyx

Open Source AI Platform - AI Chat with advanced features that works with every LLM

Python33.3kRead on November 7, 2026, at commit a757433What is onyx built with?

Only in onyx

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
SkillOpt89,655 lines written147 code files
onyx1,626,990 lines written3,906 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
onyx11.7% of its commits signed by AIWith Claude Code, Devin, Cursor, CodeRabbit, GitHub Copilot, and Sweep
ActivityFrom GitHub and its history, on the day SeeRepo read it.
SkillOptLast push November 5, 2026474 commits18,915 stars
onyxLast push November 7, 202611,391 commits33,270 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
onyx3,158 test files45.7% of its code files have a test that imports them

Frequently asked questions

Which is bigger, SkillOpt or onyx?
onyx, with 1,626,990 lines written; SkillOpt has 89,655.

The proof: onyx-dot-app/onyx's code at commit a757433

Which has more GitHub stars, SkillOpt or onyx?
onyx, with 33,270 stars; SkillOpt has 18,915.

The proof: onyx-dot-app/onyx on GitHub

Which has more tests, SkillOpt or onyx?
onyx, with 3,158 test files; SkillOpt has 104.

The proof: onyx-dot-app/onyx's code at commit a757433

Which was updated more recently, SkillOpt or onyx?
onyx: its last push was on November 7, 2026, and SkillOpt's on November 5, 2026.

The proof: onyx-dot-app/onyx's commits on GitHub

Which has more commits signed by AI, SkillOpt or onyx?
SkillOpt: an AI signed 38.6% of its commits, with Claude Code, GitHub Copilot, Codex, Devin, and Cursor; in onyx, 11.7%.

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

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