Understand the codebase
Trace behavior across files, dependencies, configuration and existing project instructions before making changes.
Ship real work,
not just answers.
TREJJ One can enter your codebase through Codex and supported IDEs, trace bugs across files, make coordinated edits, run tools and tests, and carry complex tasks through to a reviewable result.
✓Codex and supported IDEs
✓Automatic model selection
✓Plan usage first
Project executionFrom request to verified change- Context
- Whole codebase
- Actions
- Files, tools and tests
- Intelligence
- Best included
- You control
- Approvals
Give TREJJ One the whole task.
Agentic Access goes beyond a chat reply. It works inside the project context you approve, moves across files and tools, and keeps going until there is something concrete to review.
Edit real files
Implement coordinated changes, preserve working behavior and show you exactly what changed.
Run the workflow
Use development tools, inspect failures, run focused tests and iterate toward a verified result under your approvals.
Use your best intelligence
TREJJ One automatically selects the highest Agentic intelligence included with your account plan.
Works where you build.
Use Codex CLI in the terminal or the Codex extension in VS Code, VS Code Insiders, Cursor and Windsurf. Setup is available for macOS, Linux, Windows and Windows Subsystem for Linux.
macOS
Linux
Windows
Windows WSL
Codex CLITerminal
VS CodeCodex extension
VS Code InsidersCodex extension
CursorCodex extension
WindsurfCodex extension
Choose your operating system and preferred workspace after signing in.
Turn a request into a working change.
Choose a plan marked Agentic Access, then connect your account when you are ready.