AI developer tooling / Jul 2026
Codex Session Visualizer
VS Code extension that visualizes how Codex explores, reads, edits, creates, and deletes files during AI coding sessions.
VS Code Extension API / TypeScript / Multi-agent Systems / Developer Tools
Codex Session Visualizer
Highlights
- Labels files and folders with Found, Read, Edited, Created, and Deleted activity states.
- Parses raw Codex sessions into readable logs covering prompts, responses, tools, file operations, and execution flow.
- Generates multi-agent graphs connecting the main session with delegated sub-agents.
Problem
Raw AI coding sessions are difficult to inspect because prompts, tool calls, file operations, and delegated agents are spread across dense logs.
What I built
- File and folder labels for Found, Read, Edited, Created, and Deleted activity states.
- Readable session logs for prompts, responses, tools, file operations, and execution flow.
- A graph view connecting a parent session with delegated sub-agent sessions.
Technical decisions
The extension focuses on turning raw Codex session data into inspectable state: file activity, chronological logs, and parent/sub-agent relationships.
Current limitations
The portfolio still needs a real screenshot showing the VS Code interface, session logs, file states, and graph view.