prompt-builder

Assemble AI agent prompts from ordered modules with token budget management.

5|2|Updated Feb 8, 2026
One-click install
npx skills add https://github.com/project-ax/ax --skill prompt-builder-project-ax
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: prompt-builder
Source: https://github.com/project-ax/ax/tree/main/.claude/skills/ax/prompt-builder
Command: npx skills add https://github.com/project-ax/ax --skill prompt-builder-project-ax

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill addresses the complexity of dynamically assembling and managing the instructions given to an AI agent, ensuring optimal performance and resource utilization.

Core Features & Use Cases

  • Modular Prompt Assembly: Builds agent prompts from composable modules (identity, security, skills, etc.).
  • Token Budget Management: Intelligently includes or drops modules based on available context window tokens.
  • Bootstrap Mode Handling: Manages initial agent setup and identity discovery.
  • Use Case: When developing a new AI agent feature that requires specific instructions on how to interact with tools, you would use this Skill to add a new module that defines these instructions and ensures they are prioritized correctly within the agent's overall prompt.

Quick Start

Use the prompt-builder skill to add a new module for handling user preferences to the agent's prompt.

Frequently Asked Questions about prompt-builder

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I dynamically assemble AI agent system prompts from composable modules?

You dynamically assemble AI agent system prompts by processing ordered modules through a pipeline that manages conditional inclusion. This ensures the final prompt is contextually structured and optimized for the agent's operational requirements.

What is the best way to manage token budgets when building large LLM instructions?

Managing token budgets when building LLM instructions involves intelligently including or dropping composable modules based on the available context window. This guarantees the assembled system prompt stays within operational token allocation limits without manual truncation.

How do I set up initial identity discovery for a new AI agent?

Initial identity discovery for a new AI agent is set up using bootstrap mode. This mode manages the initial agent setup process, allowing the system to dynamically discover and establish the agent's core identity before full prompt assembly begins.

Can I conditionally include specific tool instructions in an LLM prompt?

Yes, you can conditionally include specific tool instructions in an LLM prompt. The module system supports conditional inclusion based on available context tokens and produces context-aware tool filtering metadata to control exactly which instructions are active.

Does prompt engineering work with modular systems for multi-feature agent development?

Prompt engineering works effectively with modular systems for multi-feature agent development by allowing you to add new modules for specific features like user preferences. Each module defines specific instructions and ensures they are prioritized correctly within the overall prompt.