A set of rules for how an AI coding agent should work in a project. It covers context warnings, requests for missing material, error correction, complete code, comments, validation, strict TypeScript, and string style.

Use it to guide TypeScript implementation, error handling, comments, type definitions, string formatting, context-limit warnings, and missing-content requests.

It gives the agent consistent expectations for code quality and communication. It also tells the agent how to respond when the project lacks information or contains terminology errors.

How SmythOS/smythos-studio configures Cursor

Reuse

Borrowing it

Nothing to install: this file belongs to SmythOS/smythos-studio. 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/SmythOS/smythos-studio/main/.cursorrules

Clone the repo

git clone --depth 1 https://github.com/SmythOS/smythos-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.

README.md

[![agentmods](https://agentmods.dev/badge/rules/smythos/smythos-studio/cursorrules/github.svg)](https://agentmods.dev/rules/smythos/smythos-studio/cursorrules)

Your own site

<a href="https://agentmods.dev/rules/smythos/smythos-studio/cursorrules"><img src="https://agentmods.dev/badge/rules/smythos/smythos-studio/cursorrules/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.

Your own site · 80×15

<a href="https://agentmods.dev/rules/smythos/smythos-studio/cursorrules"><img src="https://agentmods.dev/badge/rules/smythos/smythos-studio/cursorrules.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 255 This file is loaded in full into every session.

When invoked 255 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.00255	$0.00255
Opus 5.5	$0.00102	$0.00102
Sonnet 5.5	$0.00051	$0.00051
Haiku 4.5	$0.00026	$0.00026

Measured 2mo ago against content hash 24b4bd1b10bf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

cursorrules 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 2mo 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.

.cursorrules · 18 lines

What it actually says

OPERATIONAL FEATURES

Context Window Warnings: Alert the user when nearing the context window limit.
Missing Content Requests: Request the user to provide project code, documentation, or definitions necessary for an adequate response.
Error Correction: Indicate all user prompt errors of terminology, convention, or understanding, regardless of their relevance to the user prompt.

CRITICALLY IMPORTANT RULES

Completeness: Generate full code, no placeholders. If unable, explain in comments.
Comments: Include clear inline comments and JSDoc headers describing each step of code.
Error Checking: Implement error checking and type validation.
Types: Implement strict TypeScript notation, defining new types as necessary. Additionally:
- Do not use the 'any' type.
- Do not use the non-null assertion operator (!).
- Do not cast to unknown (e.g. as unknown as T).
Strings: Adhere to these standards for strings:
- Use single quotes (') for strings.
- Use string templates instead of operational concatenation.

It is critically important that you adhere to the above five rules.

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.

2mo ago First seen · 18 lines · 255 tokens per session scan A 24b4bd1b10bf

Subscribe to this mod's changes

cursorrules is a cursor rule published in the GitHub repository SmythOS/smythos-studio (665 stars, last pushed 7mo ago), licensed MIT. It adds 255 tokens to every session, about $0.0010 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 2026-08-30.

a2a ai-agents mcp-client n8n-alternative open-source smythos

cursorrules next to 6 cursor rules from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
cursorrulesSmythOS/smythos-studio	Cursor rule	665	7mo ago	MIT	A	255	Cursor
cursorruleskortix-ai/suna	Cursor rule	20k	3d ago	none	A	4,277	Cursor
writewaynesutton/markdown-site	Cursor rule	627	5mo ago	MIT	A	26	Cursor
ehs-ims-conventionsSafetyMP/Autonomous-EHS-Management	Cursor rule	9	6d ago	Apache-2.0	A	722	Cursor
php-client-implementationdalehurley/php-mcp-sdk	Cursor rule	27	11mo ago	MIT	A	8	Cursor
readme-best-practicesofershap/readme-best-practices	Cursor rule	0	8mo ago	MIT	A	276	Cursor
vue-best-practicesandrewsky-labs/zentrun	Cursor rule	33	1y ago	none	A	0	Cursor

smythos-studio: Cursor rule for Cursor