syakoo-lab: Skill for Cursor

.cursor/skills/tune-prompt/SKILL.md

tune-prompt is a skill for Cursor from syakoo/syakoo-lab. It costs 84 tokens per session (1,093 once invoked), scanned A, original, no licence file.

A method for testing agent instructions with new agents and scored checklists, then changing one instruction theme at a time.

In plain words
What is it for?
Use it to validate new or heavily revised instructions and investigate agents that do not follow them correctly.
Why use it?
It helps reveal whether a skill, rule, or prompt actually changes agent behaviour instead of relying on guesswork.

Skill for Cursor

Written for Cursor: installed under .cursor/.

This is syakoo/syakoo-lab's own configuration. It tells Cursor how to work on syakoo-lab itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything syakoo-lab configures →

Reuse

Borrowing it

Nothing to install: this file belongs to syakoo/syakoo-lab. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/syakoo/syakoo-lab/main/.cursor/skills/tune-prompt/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/syakoo/syakoo-lab

Made for: Cursor.

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 tune-prompt

README.md
[![agentmods](https://agentmods.dev/badge/skills/syakoo/syakoo-lab/tune-prompt/github.svg)](https://agentmods.dev/skills/syakoo/syakoo-lab/tune-prompt)
Your own site
<a href="https://agentmods.dev/skills/syakoo/syakoo-lab/tune-prompt"><img src="https://agentmods.dev/badge/skills/syakoo/syakoo-lab/tune-prompt/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 tune-prompt

Your own site · 80×15
<a href="https://agentmods.dev/skills/syakoo/syakoo-lab/tune-prompt"><img src="https://agentmods.dev/badge/skills/syakoo/syakoo-lab/tune-prompt.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,093 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.
Origin unknown 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 $0.00084 $0.01093
Opus 5 $0.00042 $0.00547
Sonnet 5 $0.00017 $0.00219
Haiku 4.5 $0.00008 $0.00109

Measured 11d ago against content hash 655563c4ca98, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

tune-prompt 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 11d 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.

.cursor/skills/tune-prompt/SKILL.md · 157 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 11d ago First seen · 157 lines · 84 tokens per session scan A 655563c4ca98

Subscribe to this mod's changes

tune-prompt is a skill published in the GitHub repository syakoo/syakoo-lab (2 stars, last pushed 5d ago), with no licence file. It adds 84 tokens to every session and 1,093 once invoked, about $0.0004 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 2026-08-31.

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