shinka-run

shinka-run is a skill for Claude Code, Codex from SakanaAI/ShinkaEvolve. It costs 62 tokens per session (1,329 once invoked), scanned A, original, Apache-2.0.

A command-line workflow for running existing ShinkaEvolve tasks. ShinkaEvolve is a system that uses language models and evolutionary search to create and test program variations.

In plain words
What is it for?
Use it when a directory already contains evaluate.py and an initial program, and you want to launch configurable program-mutation runs with shinkarun.
Why use it?
It provides the required checks and command settings for starting an evolution run from an existing task directory. This helps avoid invalid runs caused by missing files or unavailable models.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when a directory already contains evaluate.py and an initial program, and you want to launch configurable program-mutation runs with shinkarun.

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Install with agentmods
npx agentmods add skills/sakanaai/shinkaevolve/shinka-run
About the project

ShinkaEvolve is a framework that combines large language models with evolutionary algorithms to improve scientific programs through repeated code variation and evaluation. Researchers and developers use it to explore and optimize code for scientific discovery. Its catalogue skills guide coding agents through setup, conversion, evolution, and result inspection.

SakanaAI/ShinkaEvolve · 1,379 stars · on GitHub · sakanaai.github.io

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add SakanaAI/ShinkaEvolve --skill shinka-run
Clone the repo
git clone --depth 1 https://github.com/SakanaAI/ShinkaEvolve

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for shinka-run

README.md
[![agentmods](https://agentmods.dev/badge/skills/sakanaai/shinkaevolve/shinka-run/github.svg)](https://agentmods.dev/skills/sakanaai/shinkaevolve/shinka-run)
Your own site
<a href="https://agentmods.dev/skills/sakanaai/shinkaevolve/shinka-run"><img src="https://agentmods.dev/badge/skills/sakanaai/shinkaevolve/shinka-run/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for shinka-run

Your own site · 80×15
<a href="https://agentmods.dev/skills/sakanaai/shinkaevolve/shinka-run"><img src="https://agentmods.dev/badge/skills/sakanaai/shinkaevolve/shinka-run.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 62 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,329 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00062 $0.01329
Opus 5 $0.00031 $0.00665
Sonnet 5 $0.00012 $0.00266
Haiku 4.5 $0.00006 $0.00133

Measured 12d ago against content hash b730e37e7ed5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

shinka-run scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/shinka-run/SKILL.md · 114 lines

How it starts

The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Shinka Run CLI Skill

Run a batch of program mutations using ShinkaEvolve's CLI interface.

When to Use

Use this skill when:

  • evaluate.py and initial.<ext> already exist
  • The user wants to run code evolution using the ShinkaEvolve/Shinka library
  • You want configurable program evolution runs using explicit CLI args

Do not use this skill when:

  • You need to scaffold a new task from scratch (use shinka-setup)

What is ShinkaEvolve?

A framework developed by SakanaAI that combines LLMs with evolutionary algorithms to propose program mutations, that are then evaluated and archived. The goal is to optimize for performance and discover novel scientific insights.

Repo and documentation: https://github.com/SakanaAI/ShinkaEvolve Paper: https://arxiv.org/abs/2212.04180

Workflow

  1. Inspect task directory
ls -la <task_dir>

Confirm evaluate.py and initial.<ext> exist.

  1. Inspect CLI reference quickly
shinka_run --help
  1. Check model availability before proposing a run
shinka_models
shinka_models --verbose

Validate the exact run config against shinka_models:

  • Mutation models: every entry in evo.llm_models must appear in the llm list.
  • Meta recommendation models: if evo.meta_rec_interval is set and evo.meta_llm_models is set, every meta model must appear in the llm list.
  • Prompt evolution models: if evo.evolve_prompts=true, use evo.prompt_llm_models when provided, otherwise evo.llm_models; every selected model must appear in the llm list.
  • Embedding model: if evo.embedding_model is set, it must appear in the embedding list.
  • Local OpenAI-compatible models are allowed for LLMs and embeddings via local/<model>@http(s)://host[:port]/v1, and these local models are not expected to appear in shinka_models.

Important runtime rules:

  • Do not assume meta recommendations fall back to evo.llm_models. In the current runner, meta recommendations are only enabled when evo.meta_llm_models is explicitly set.
  • Prompt evolution does fall back to evo.llm_models when evo.prompt_llm_models is unset.
  • Treat local/<model>@http(s)://host[:port]/v1 values as an explicit exception to the shinka_models membership check. Instead, confirm the local endpoint URL and serving status separately before running.
  • If any required model is missing from shinka_models, stop and ask the user to either change the config or set the missing credentials first.

Read the full file on GitHub · 114 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 114 lines · 62 tokens per session scan A b730e37e7ed5

Subscribe to this mod's changes

shinka-run is a skill published in the GitHub repository SakanaAI/ShinkaEvolve (1,379 stars, last pushed 21d ago), licensed Apache-2.0. It adds 62 tokens to every session and 1,329 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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