Developer tooling

Parallax

A local Codex plugin for independent Claude Code review and explicit editing handoffs.

My roleBuilt the plugin, Python bridge, resumable sessions, and file-change reporting.

Released · First Contact

Explore the workflow

Interactive walkthrough

Follow the handoff between two agents.

Start with independent review, or examine the additional boundary required for a delegated edit.

Choose a handoff

Select a stage to inspect its role in the workflow.

Step 4: Verify the result. Resolve disagreement through evidence.

01 / Sample primary viewCodex

Filtering empty strings shifts later columns in Ada,,Detroit.

02 / Sample independent viewClaude Code

A trailing comma in Ada, loses the final empty field.

Read-only consultation

Read, Glob, Grep → answer and file report

Illustrative file reportchanged_files: []

Consultation keeps file-editing tools unavailable.

Codex / Verification

Compare diagnoses → check the source

Step 04 / Inspect

Resolve disagreement through evidence.

Codex checks the source and relevant tests, explains remaining differences, and decides what the evidence supports.

Compare sample findings against two fixtures:
Ada,,Detroit → later columns must keep their position
Ada, → the final empty field must remain
No repository files changed in this exhibit.

Claude gets read-only file tools; Codex compares the response against its own view and source evidence.

Illustrative local handoff with sample reports. This walkthrough makes no model calls.

Plugin workflow and bridge

Results

First Contact is publicly released with installation instructions, an MIT license, and a Python unittest suite.
The bridge and plugin skill are inspectable in the public repository.

Engineering details

Getting another coding agent's perspective usually means moving context between chats. Parallax makes an independent review available within an existing local task.

Start with independent views

Codex forms its own assessment, asks the signed-in Claude Code CLI for a read-only review of the workspace, and brings the two views together.

Keep a focused conversation

A structured response returns the answer, session identifier, file report, and any error. Follow-ups can resume that Claude session.

Make editing an explicit handoff

Delegated editing is separate from consultation. The bridge reports file changes so Codex can inspect the diff and run relevant checks.

More work