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migration

2 posts with the tag “migration”

Five LaunchDarkly SDK Patterns That Block Automatic Migration to OpenFeature

- 5 min read
Krishan Sharma
Founder and maintainer of FlagLint

Run flaglint migrate ./src --dry-run and you will see two kinds of results: call sites with a generated diff and call sites marked skip — manual review required. The skipped calls are not bugs in the tool. They are patterns where a mechanical rewrite would change runtime behavior in ways the tool cannot prove are safe.

This article covers the five patterns that produce skips and what you need to do for each.

Why LaunchDarkly → OpenFeature Migrations Break in Production

- 3 min read
Krishan Sharma
Founder and maintainer of FlagLint

LaunchDarkly and OpenFeature both evaluate flags with three arguments, but the fallback and context positions are reversed. A naive codemod can produce valid-looking code that silently changes runtime behavior.

This article shows the argument-order trap and why FlagLint uses AST analysis before rewriting any call site.