OpenAI recently introduced a new hook system for Codex (released around late March 2026), which allows developers to intercept and modify tool calls using a hooks.json configuration.
https://developers.openai.com/codex/hooks
Currently, Plannotator provides a great UX for Claude Code's hook system. Since OpenAI Codex now supports similar events like PreToolUse, it should be possible to implement a similar "Plan Review" workflow for Codex users.
Proposed Changes:
Add support for OpenAI Codex's hooks.json format.
Implement the PreToolUse hook to trigger Plannotator's visualization/editing UI when Codex generates a plan.
Update the documentation for apps/codex once the plan mode is supported.
Additional Context:
This would bridge the gap between the current Claude Code support and OpenAI Codex, making Plannotator a more universal tool for AI-driven development.
OpenAI recently introduced a new hook system for Codex (released around late March 2026), which allows developers to intercept and modify tool calls using a hooks.json configuration.
https://developers.openai.com/codex/hooks
Currently, Plannotator provides a great UX for Claude Code's hook system. Since OpenAI Codex now supports similar events like PreToolUse, it should be possible to implement a similar "Plan Review" workflow for Codex users.
Proposed Changes:
Add support for OpenAI Codex's hooks.json format.
Implement the PreToolUse hook to trigger Plannotator's visualization/editing UI when Codex generates a plan.
Update the documentation for apps/codex once the plan mode is supported.
Additional Context:
This would bridge the gap between the current Claude Code support and OpenAI Codex, making Plannotator a more universal tool for AI-driven development.