Muse Code Loads Codex and Claude Rules by Default. We Traced What Gets Sent to Meta
Meta documents that machine-wide user rules always load. RuntimeWire captured the resulting provider request and examined what that default means for personal files written for competing AI clients.
By Ryan Merket · Published · Updated
Primary source: OpenAI
Why it matters
Muse’s compatibility feature copies personal instructions from rival-agent directories into requests to Meta. The company has not explained how that material is treated under Contributor-tier data terms.
Meta's Muse Code automatically loads machine-wide personal rules created for Codex and Claude Code. Meta documents the behavior in its configuration guide: "Your machine-wide user rules always load."
The Muse terminal also prints a startup notice when it finds Codex rules: Including your Codex personal rules - manage with /settings. It does not display an interactive permission request. Users can exclude the files from a run with --no-foreign-personal-context.…
When you purchase through links in our articles, we may earn a small commission. This doesn’t affect our editorial independence.