Rust & Axum OpenAI Custom Instructions

Production-grade architectural rulebook for Rust & Axum. Engineered to eliminate LLM hallucinations, enforce strict deterministic conventions, and prevent architectural drift across Cursor IDE, Claude Code CLI, and autonomous multi-agent pipelines.

Target Path

prompts/openai-custom-instructions.md

Execution Scope

Project Context

Specification Format

Markdown / Config

AI Tool Support

Universal AI Assistants

02 / DRIFT ANALYSIS & VALUE PROPOSITION

Failure Patterns Prevented for Rust & Axum

Without This Rule (Default LLM Behavior)Vulnerable

Rust async borrow checker rules and Axum extractor ordering can confuse LLMs. These rules enforce proper State injection, custom error enums with `IntoResponse`, and minimal unwrap() usage.

Hallucination Symptoms

Invokes deprecated or removed APIs from older model training weights
Generates conflicting configuration files and invalid imports
Silently drops type-safety, boundaries, or transaction isolation

With This Rule (Guaranteed Invariants)Deterministic

Never call `.unwrap()` or `.expect()` in production route handlers; propagate errors via `Result<T, AppError>`.

Implement `IntoResponse` on custom application error enums with appropriate HTTP status codes.

Use `State(app_state)` extractors for shared database pools and configurations.

Keep Axum handlers strongly typed with `Json<T>` and `Path<T>` extractors.

04 / REPOSITORY PLACEMENT & 3-STEP TERMINAL INSTALLATION

How to Install Rust & Axum OpenAI Custom Instructions via Terminal

Step 1: Open Project Directory & Verify Target Placement

Open your terminal and navigate to your project root folder where the prompts/openai-custom-instructions.md file will reside. Ensure the file is placed at the exact path below relative to your project root so the AI engine automatically loads it:

prompts/openai-custom-instructions.md

Step 2: Fetch Rule File via Terminal Command

Run curl, PowerShell, or wget to stream the rule directly from the DevScratchpad raw API endpoint and write it to prompts/openai-custom-instructions.md:

Terminal One-Liner Install

Run directly in your project root to stream and write this rule file with one command.

Raw API Stream

mkdir -p "prompts" && curl -fsSL "https://www.devscratchpad.tech/api/raw/openai-instructions/rust-axum" -o "prompts/openai-custom-instructions.md"

Step 3: Verify and Activate with AI Agent

Launch your AI coding assistant (Universal AI Assistants). The assistant will automatically discover prompts/openai-custom-instructions.md in your repository and apply the architectural guardrails, type constraints, and verification protocols during code generation.

05 / ROUTE DIRECTORY & CROSS-TOOLING

Alternative AI Formats for Rust & AxumCross-Tooling

/ai-skill-studio/cursor-rules/go-fiberGo Fiber Cursor Rules

→

/ai-skill-studio/claude-md/rust-axumRust Axum CLAUDE.md

→

Related OpenAI Custom Instructions PresetsSame Directory

Frontend

Next.js 15 App Router

→

Frontend

React 19 & Vite