openai / openai/codex

Add Look Up to IDE extension selected-text menu

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enhancement extension
Dominant language
Rust
Stars
125k
Forks
19.4k
PR merge metrics
PR metrics pending

Description

What variant of Codex are you using?

IDE Extension (Cursor, macOS)

What feature would you like to see?

When I select a word in a Codex response, it'd be great to have a Look Up action that shows a short dictionary definition inline or in a small popover. Currently, looking up an unfamiliar word means switching to a browser and searching there. Desired flow is:

  1. Select a word in Codex response
  2. Right-click and choose “Look Up”
  3. Read definition without leaving Cursor

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the IDE extension entry point that builds the selected-text context menu; the issue does not name a file or test. Trace how actions are presented in Cursor on macOS, then identify the existing UI or service boundary for showing inline results. Done means a selected word exposes “Look Up” and displays a short definition without leaving Cursor.

Written by the indexing model from the issue text.

Assessment

Tech stack
macos, rust
Domain
desktop, developer-experience
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
45/100

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