context7-documentation

context7-documentation is a cursor rule for Cursor from J-Pster/Psters_AI_Workflow. It costs 212 tokens per session, scanned A, original, MIT.

A rule requiring current Context7 library documentation before implementing or debugging features involving software libraries or frameworks.

In plain words
What is it for?
Use it to find the correct documentation for a library, resolve its documentation identifier, and query specific guidance before coding or debugging.
Why use it?
It reduces mistakes caused by outdated or guessed API usage, especially when library behavior or syntax may have changed.

Cursor rule for Cursor

Written for Cursor: a Cursor rule (.mdc).

Good fit Use it to find the correct documentation for a library, resolve its documentation identifier, and query specific guidance before coding or debugging.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/j-pster/psters_ai_workflow/context7-documentation
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/J-Pster/Psters_AI_Workflow

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 context7-documentation

README.md
[![agentmods](https://agentmods.dev/badge/rules/j-pster/psters_ai_workflow/context7-documentation/github.svg)](https://agentmods.dev/rules/j-pster/psters_ai_workflow/context7-documentation)
Your own site
<a href="https://agentmods.dev/rules/j-pster/psters_ai_workflow/context7-documentation"><img src="https://agentmods.dev/badge/rules/j-pster/psters_ai_workflow/context7-documentation/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 context7-documentation

Your own site · 80×15
<a href="https://agentmods.dev/rules/j-pster/psters_ai_workflow/context7-documentation"><img src="https://agentmods.dev/badge/rules/j-pster/psters_ai_workflow/context7-documentation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 212 This file is loaded in full into every session.
When invoked 212 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00212 $0.00212
Opus 5.5 $0.00085 $0.00085
Sonnet 5.5 $0.00042 $0.00042
Haiku 4.5 $0.00021 $0.00021

Measured 1mo ago against content hash d0f6809a089c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

context7-documentation 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 1mo 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.

plugins/psters-ai-workflow/rules/context7-documentation.mdc · 28 lines

What it actually says

Context7 — Library Documentation First

Always use the Context7 MCP to fetch up-to-date documentation before implementing features or debugging issues that involve libraries or frameworks.

How to Use

  1. Resolve library ID: Call resolve-library-id (Context7 MCP server) with libraryName and query.
  2. Fetch docs: Call query-docs with the resolved libraryId and a specific query.

Known Library IDs

  • /nestjs/docs.nestjs.com — NestJS official docs
  • /nestjs/nest — NestJS core library

For other libraries, resolve the ID first with resolve-library-id.

When to Use

  • Before implementing with NestJS, Angular, TypeORM, or any external library
  • When checking decorator usage, DI patterns, or API references
  • When debugging framework-specific behavior
  • When verifying migration guides or version-specific patterns
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. 1mo ago First seen · 28 lines · 212 tokens per session scan A d0f6809a089c

Subscribe to this mod's changes

context7-documentation is a cursor rule published in the GitHub repository J-Pster/Psters_AI_Workflow (289 stars, last pushed 7mo ago), licensed MIT. It adds 212 tokens to every session, about $0.0008 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.