Move from Claude to Codex: will CRG still work?

[dannytb-coding-projects]

Just a quick question for those who have changed over from Claude Code to Codex. Does Code Review Graph still work after installing it into Codex? Or will I have to get it to relearn my codebase?

Between production code and TDD tests, I have about 50,000 lines of code, so it isn't huge, but it isn't insignificant either. Thanks in advance to anyone who responds.

Cheers,
Danny

[TongyiDai]

You should not need to relearn/rebuild the codebase merely because you switch from Claude Code to Codex. The graph is stored locally for the repository; the Claude/Codex integrations are clients of that same graph rather than separate copies of the code model.

From the existing checkout, I would do:

code-review-graph install --platform codex
code-review-graph status
code-review-graph update

Then restart Codex so it reloads the MCP configuration and repository instructions. Use update, not build, when the existing .code-review-graph/ data is present; it hashes files and reparses only changes. A full build is only necessary if the graph directory was deleted, the repository was cloned to a different location without its graph data, or status reports that no usable graph exists.

Two details matter if you keep both tools installed:

1. Run the Codex install from the same repository checkout, so both clients resolve the same project root.
2. Do not delete the Claude integration just to add Codex. code-review-graph install --platform codex targets only Codex; the project graph remains independent of either client.

The current README explicitly lists Codex as a supported platform and describes graph storage as a local SQLite database under .code-review-graph/, with incremental updates after the initial build. For a 50k-line repository, switching the integration should therefore be quick; the expensive operation is indexing the repository, not changing which MCP-capable client queries it.

[dannytb-coding-projects]

Thank you for your help. Much appreciated!