FlagLint

FlagLint (v0.6.0) is a CLI tool that scans LaunchDarkly Node.js SDK usage and generates safe, reviewable migration diffs to OpenFeature. It inventories all direct calls (boolVariation, stringVariation, etc.), reports dynamic keys and unguarded patterns, and provides a CI gate to prevent new vendor-coupled flag access. Released under MIT, it supports both ESM and CJS imports from launchdarkly-node-server-sdk and @launchdarkly/node-server-sdk. Key differentiators: argument-order error detection, automated migration with --apply, and zero-runtime dependencies (only Node >=20 required).