300-adaption

300-adaption is a cursor rule for Cursor from heyzgj/cursor-project-master. It costs 1,061 tokens per session, scanned A, original, no licence file.

A set of rules for handling uncertainty, learning from failures, and making difficult decisions during software work. It guides how the agent responds when the right next step is unclear.

In plain words
What is it for?
Use it for uncertain tasks, failure analysis, and complex decisions that require adapting based on what has been learned.
Why use it?
It gives the agent a defined way to use mistakes and incomplete information when deciding what to do next.

Cursor rule for Cursor

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.

agentmods
npx agentmods add rules/heyzgj/cursor-project-master/300-adaption
Clone the repo
git clone --depth 1 https://github.com/heyzgj/cursor-project-master

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 300-adaption

README.md
[![agentmods](https://agentmods.dev/badge/rules/heyzgj/cursor-project-master/300-adaption.svg)](https://agentmods.dev/rules/heyzgj/cursor-project-master/300-adaption)
Your own site
<a href="https://agentmods.dev/rules/heyzgj/cursor-project-master/300-adaption"><img src="https://agentmods.dev/badge/rules/heyzgj/cursor-project-master/300-adaption.svg" alt="Measured on agentmods" height="20"></a>
Per session 1,061 This file is loaded in full into every session.
When invoked 1,061 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.01061 $0.01061
Opus 5 $0.00531 $0.00531
Sonnet 5 $0.00212 $0.00212
Haiku 4.5 $0.00106 $0.00106

Measured 3d ago against content hash c6ce549b3a21, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

300-adaption 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 3d 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/rules/300-adaption.mdc · 63 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. 3d ago First seen · 63 lines · 1,061 tokens per session scan A c6ce549b3a21

Subscribe to this mod's changes

300-adaption is a cursor rule published in the GitHub repository heyzgj/cursor-project-master (169 stars, last pushed 1y ago), with no licence file. It adds 1,061 tokens to every session, about $0.0053 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.