{"schema_version":"newruntime-agent-readable-v0.2","type":"post","stable_id":"post:codex-hooks-close-the-type-error-loop","slug":"codex-hooks-close-the-type-error-loop","title":"Codex Hooks Close the Type Error Loop","description":"Codex hooks make validation output an active part of the agent loop, so type errors and checks can be returned before the task drifts.","retrieval_nugget":"Codex hooks make validation output an active part of the agent loop, so type errors and checks can be returned before the task drifts. Codex hooks matter because they make validation output part of the live agent loop. A type error, lint failure, or project-specific check can be returned while the agent is still inside the task, before the work.","status":"published","published_at":"2026-07-29","updated_at":"2026-07-29","record_date":"2026-07-29","date_kind":"published_at","topics":["coding-agents","ai-infrastructure"],"source_urls":["https://learn.chatgpt.com/docs/hooks"],"visuals":[{"id":"codex-hooks-close-the-type-error-loop","kind":"editorial-diagram","role":"hero","src":"https://newruntime.com/images/posts/codex-hooks-close-the-type-error-loop.webp","alt":"Hand-drawn edit hook check error retry pass loop inside a project boundary.","caption":"Hooks make deterministic validation part of the live agent loop: edit, check, error, retry, and pass happen before drift spreads.","credit":"New Runtime synthesis","source_url":"https://learn.chatgpt.com/docs/hooks","generated_with":"nano-banana-style-imagegen","width":1600,"height":900,"legend":[]}],"routes":{"html":"https://newruntime.com/posts/codex-hooks-close-the-type-error-loop/","markdown":"https://newruntime.com/posts/codex-hooks-close-the-type-error-loop.md","json":"https://newruntime.com/posts/codex-hooks-close-the-type-error-loop.json"},"source_format":"markdown","next_reads":[{"type":"topic","path":"/topics/ai-infrastructure/","reason":"Explore the ai infrastructure topic hub.","url":"https://newruntime.com/topics/ai-infrastructure/","title":"AI Infrastructure - New Runtime","media_type":"text/html"},{"type":"topic","path":"/topics/coding-agents/","reason":"Explore the coding agents topic hub.","url":"https://newruntime.com/topics/coding-agents/","title":"Coding agents - New Runtime","media_type":"text/html"},{"type":"related_material","path":"/posts/claude-md-prompt-cruft-shrinkage/","reason":"Shares ai infrastructure and coding agents.","url":"https://newruntime.com/posts/claude-md-prompt-cruft-shrinkage/","title":"Claude.md Shrinkage Says the Harness Is Learning What Not to Say","media_type":"text/html"},{"type":"related_material","path":"/posts/codex-multi-agent-orchestration-skill/","reason":"Shares ai infrastructure and coding agents.","url":"https://newruntime.com/posts/codex-multi-agent-orchestration-skill/","title":"A Codex Skill Turns Multi-Agent Work Into a Reusable Control Surface","media_type":"text/html"},{"type":"related_material","path":"/posts/prompt-caching-turns-context-into-infrastructure/","reason":"Shares ai infrastructure and coding agents.","url":"https://newruntime.com/posts/prompt-caching-turns-context-into-infrastructure/","title":"Prompt Caching Turns Agent Context Into Infrastructure","media_type":"text/html"}]}