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4DA: Cursor rule for Windsurf

.windsurfrules

windsurfrules is a cursor rule for Windsurf from 4DA-Systems/4DA. It costs 1,848 tokens per session, scanned A, original, no licence file.

A rules configuration for 4DA, a developer-information tool that reads public internet data locally to decide what is relevant to a codebase.

In plain words
What is it for?
Configuring how 4DA applies rules when gathering developer information for a project.
Why use it?
It gives the tool project-specific rules for interpreting information while keeping the codebase's relevance decisions local.

Cursor rule for Windsurf

Written for Windsurf: a Windsurf rule.

This is 4DA-Systems/4DA's own configuration. It tells Windsurf how to work on 4DA 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 4DA configures →

not rated 2repo changed 27d ago A scan 1,848 tokens custom licence
View source ↗ 4DA-Systems/4DA 4da.ai
Reuse

Borrowing it

Nothing to install: this file belongs to 4DA-Systems/4DA. 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/4DA-Systems/4DA/main/.windsurfrules
Clone the repo
git clone --depth 1 https://github.com/4DA-Systems/4DA

Made for: Windsurf.

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 windsurfrules

README.md
[![agentmods](https://agentmods.dev/badge/rules/4da-systems/4da/windsurfrules/github.svg)](https://agentmods.dev/rules/4da-systems/4da/windsurfrules)
Your own site
<a href="https://agentmods.dev/rules/4da-systems/4da/windsurfrules"><img src="https://agentmods.dev/badge/rules/4da-systems/4da/windsurfrules/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 windsurfrules

Your own site · 80×15
<a href="https://agentmods.dev/rules/4da-systems/4da/windsurfrules"><img src="https://agentmods.dev/badge/rules/4da-systems/4da/windsurfrules.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,848 This file is loaded in full into every session.
When invoked 1,848 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 $0.01848 $0.01848
Opus 5.5 $0.00739 $0.00739
Sonnet 5.5 $0.00370 $0.00370
Haiku 4.5 $0.00185 $0.00185

Measured 27d ago against content hash 01ea5c6b9b7d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

windsurfrules 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 27d 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.

.windsurfrules · 151 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. 27d ago Changed · +1 lines · +41 tokens per session 01ea5c6b9b7d
  2. 1mo ago Changed · +9 tokens per session d65daea939d1
  3. 1mo ago Changed 3d9bacf79d79
  4. 2mo ago First seen · 150 lines · 1,798 tokens per session scan A 00ba504b5620

Subscribe to this mod's changes

windsurfrules is a cursor rule published in the GitHub repository 4DA-Systems/4DA (2 stars, last pushed today), with no licence file. It adds 1,848 tokens to every session, about $0.0074 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 2026-09-06.

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Related

windsurfrules compared with cursor rules from other repositories

windsurfrules next to 6 cursor rules from other repositories
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windsurfrules4DA-Systems/4DACursor rule2todaynoneA1,848Windsurf
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cargo-target-cachemmletgo/cc-partnerCursor rule726d agononeA256Cursor
ponytailDietrichGebert/ponytailCursor rule185k8d agoMITA604Cursor
angular-20angular/angularCursor rule101kyesterdayMITA0Cursor
dev-standardapache/supersetCursor rule75ktodayApache-2.0A1,147Cursor
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