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how_to_build_a_coding_agent [2026/03/25 15:34] – Create comprehensive guide to building coding agents agenthow_to_build_a_coding_agent [2026/03/30 22:17] (current) – Restructure: footnotes as references agent
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 ====== How to Build a Coding Agent ====== ====== How to Build a Coding Agent ======
  
-A coding agent is an AI system that can autonomously read, edit, test, and debug code. Systems like Claude Code, Aider, and SWE-agent have demonstrated that LLM-powered agents can resolve real GitHub issues, scaffold applications, and refactor codebases with minimal human intervention. This guide covers the architecture, tool design, and implementation patterns for building your own.+A coding agent is an AI system that can autonomously read, edit, test, and debug code. Systems like Claude Code, Aider, and SWE-agent have demonstrated that LLM-powered agents can resolve real GitHub issues, scaffold applications, and refactor codebases with minimal human intervention. This guide covers the architecture, tool design, and implementation patterns for building your own.(([[https://sidbharath.com/blog/build-a-coding-agent-python-tutorial/|Build a Coding Agent from Scratch - Sid Bharath]]))(([[https://developers.openai.com/cookbook/examples/build_a_coding_agent_with_gpt-5.1/|Build a Coding Agent - OpenAI Cookbook]]))(([[https://arxiv.org/html/2603.00601v4|Architectural Beliefs in Coding Agents - arXiv]]))
  
 ===== Architecture Overview ===== ===== Architecture Overview =====
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 ===== Approach 2: Using the OpenAI Agents SDK ===== ===== Approach 2: Using the OpenAI Agents SDK =====
  
-The OpenAI Agents SDK provides built-in primitives for agents, tools, handoffs, and guardrails.+The OpenAI Agents SDK provides built-in primitives for agents, tools, handoffs, and guardrails.(([[https://agentincome.io/blog/openai-agents-sdk-tutorial-2026/|OpenAI Agents SDK Tutorial 2026]]))
  
 <code python> <code python>
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   * **Truncate outputs**: Cap tool output at 3000-5000 chars to preserve context window for reasoning.   * **Truncate outputs**: Cap tool output at 3000-5000 chars to preserve context window for reasoning.
   * **Git branch per task**: Create a branch before starting work. Commit on success, reset on failure.   * **Git branch per task**: Create a branch before starting work. Commit on success, reset on failure.
-  * **Belief externalization**: After every few actions, have the agent summarize its understanding of the codebase state. Research shows this boosts task success by 14+ percentage points.+  * **Belief externalization**: After every few actions, have the agent summarize its understanding of the codebase state. Research shows this boosts task success by 14+ percentage points.(([[https://www.oreilly.com/radar/how-to-build-a-general-purpose-ai-agent-in-131-lines-of-python/|How to Build an AI Agent in 131 Lines of Python - O Reilly]]))
   * **Sandbox execution**: Run commands in Docker containers or restricted environments to prevent destructive operations.   * **Sandbox execution**: Run commands in Docker containers or restricted environments to prevent destructive operations.
   * **Test-driven verification**: Always run the test suite after edits. Parse failure output to guide the next fix.   * **Test-driven verification**: Always run the test suite after edits. Parse failure output to guide the next fix.
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 //Benchmarks as of late 2025. SWE-bench Verified is the gold standard for coding agent evaluation.// //Benchmarks as of late 2025. SWE-bench Verified is the gold standard for coding agent evaluation.//
- 
-===== References ===== 
- 
-  * [[https://sidbharath.com/blog/build-a-coding-agent-python-tutorial/|Build a Coding Agent from Scratch - Sid Bharath]] 
-  * [[https://www.oreilly.com/radar/how-to-build-a-general-purpose-ai-agent-in-131-lines-of-python/|How to Build an AI Agent in 131 Lines of Python - O Reilly]] 
-  * [[https://developers.openai.com/cookbook/examples/build_a_coding_agent_with_gpt-5.1/|Build a Coding Agent - OpenAI Cookbook]] 
-  * [[https://arxiv.org/html/2603.00601v4|Architectural Beliefs in Coding Agents - arXiv]] 
-  * [[https://agentincome.io/blog/openai-agents-sdk-tutorial-2026/|OpenAI Agents SDK Tutorial 2026]] 
  
 ===== See Also ===== ===== See Also =====
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   * [[how_to_build_a_data_analysis_agent|How to Build a Data Analysis Agent]]   * [[how_to_build_a_data_analysis_agent|How to Build a Data Analysis Agent]]
  
 +===== References =====
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