GitHub announced on September 25, 2026, that an in-product validator is now available for enterprise managed settings for GitHub Copilot. The validator, located in the "Copilot settings validation" section of the enterprise AI controls page, detects malformed JSON, unsupported configurations, invalid team mappings, and other errors that can prevent policies from being enforced.
Each identified issue specifies the affected file and JSON path. Validation covers copilot/managed-settings.json, copilot/team-mappings.json, and any team settings files referenced by the team mappings file. After correcting an issue, administrators commit the change to the default branch of their .github-private repository, reload the Agents page, and review the validator results to confirm the configuration is valid.
GitHub categorized the update as an improvement in its official changelog and linked to documentation on enterprise managed client settings for further detail.