decky-platform-contract

decky-platform-contract is a cursor rule for Cursor from qd313/decky-plugin-studio. It costs 422 tokens per session, scanned A, original, no licence file.

A set of rules for building Decky software around its platform contract, including focus graphs, styles that remain available, and matching the build environment.

In plain words
What is it for?
Use it when implementing or reviewing Decky features that involve keyboard or controller focus, persistent styling, or build consistency.
Why use it?
It helps keep the code aligned with the platform's expected behavior and reduces differences between development builds and the final result.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit Use it when implementing or reviewing Decky features that involve keyboard or controller focus, persistent styling, or build consistency.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/qd313/decky-plugin-studio/decky-platform-contract
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.

Clone the repo
git clone --depth 1 https://github.com/qd313/decky-plugin-studio

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 decky-platform-contract

README.md
[![agentmods](https://agentmods.dev/badge/rules/qd313/decky-plugin-studio/decky-platform-contract/github.svg)](https://agentmods.dev/rules/qd313/decky-plugin-studio/decky-platform-contract)
Your own site
<a href="https://agentmods.dev/rules/qd313/decky-plugin-studio/decky-platform-contract"><img src="https://agentmods.dev/badge/rules/qd313/decky-plugin-studio/decky-platform-contract/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 decky-platform-contract

Your own site · 80×15
<a href="https://agentmods.dev/rules/qd313/decky-plugin-studio/decky-platform-contract"><img src="https://agentmods.dev/badge/rules/qd313/decky-plugin-studio/decky-platform-contract.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 422 This file is loaded in full into every session.
When invoked 422 The same file — it is already loaded in full.
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 $0.00422 $0.00422
Opus 5.5 $0.00169 $0.00169
Sonnet 5.5 $0.00084 $0.00084
Haiku 4.5 $0.00042 $0.00042

Measured today against content hash 32913d456f87, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

decky-platform-contract 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 today.

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/rules/decky-platform-contract.mdc · 15 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. today Changed · -5 tokens per session 32913d456f87
  2. 1mo ago First seen · 15 lines · 427 tokens per session scan A 34309bf18d62

Subscribe to this mod's changes

decky-platform-contract is a cursor rule published in the GitHub repository qd313/decky-plugin-studio (2 stars, last pushed today), with no licence file. It adds 422 tokens to every session, about $0.0017 per session on Opus 5.5. 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.