Is the OpenMythos skill free?

Yes. The skill itself is free from SarthakDz/OpenMythos-Skill. SkillProof publishes the install command and an independent test verdict at no cost.

What is the OpenMythos SkillProof Score?

9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.

How do I install OpenMythos?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use OpenMythos with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

OpenMythos

Codebase-expert prompt for Kye Gomez's OpenMythos looped-transformer PyTorch repo.

by SarthakDz · SarthakDz/OpenMythos-Skill

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.6/10
Tested: Jul 16, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · fbe2689

Fed it a KV-cache-error-on-decode-step-2 question: it went straight to the actual repo mechanism (per-loop-depth cache keys + the kv_cache-vs-break invariant) instead of the generic cache-debugging checklist a baseline answer produced.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 9/10
Docs & honesty 5/5

What OpenMythos does

Turns Claude into a repo-specific senior engineer for OpenMythos, an independent PyTorch reconstruction of a hypothesized looped/recurrent-depth transformer architecture. Triggers on filenames, imports, symbol names (MythosConfig, RecurrentBlock, LTIInjection), variant helpers, and looped-training-specific debugging symptoms (spectral-radius drift, KV-cache errors on decode step 2+, overthinking degradation).

How to install OpenMythos

git clone https://github.com/SarthakDz/OpenMythos-Skill
mkdir -p ~/.claude/skills
cp -r OpenMythos-Skill ~/.claude/skills/openmythos

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger OpenMythos

/openmythos Codebase-expert prompt for Kye Gomez's OpenMythos looped-transformer PyTorch repo.

It also activates on plain-language prompts like these:

Decode step 2 throws a KeyError in the recurrent block's KV cache
Why is my mythos_1b inference showing spectral-radius drift?
Debug this overthinking degradation bug in my looped transformer run

Frequently asked questions

Is the OpenMythos skill free?: Yes. The skill itself is free from SarthakDz/OpenMythos-Skill. SkillProof publishes the install command and an independent test verdict at no cost.
Does OpenMythos work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 16, 2026. Verdict: Tested · Works. Fed it a KV-cache-error-on-decode-step-2 question: it went straight to the actual repo mechanism (per-loop-depth cache keys + the kv_cache-vs-break invariant) instead of the generic cache-debugging checklist a baseline answer produced.
What is the OpenMythos SkillProof Score?: 9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.
How do I install OpenMythos?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use OpenMythos with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.