v0.21.0

0.21.0 (2026-06-16)

Features

• internal/librarian/java: source google-cloud-pom-parent in pom.xml templates (#6432) (c5718f4)
• internal/librarian/java: support alternate license header files (#6311) (e7222b1)
• internal/librarian/nodejs: add client_documentation_override to migrate (#6310) (cb8b040)
• internal/librarian/python: update gapic-generator to 1.35.0 (#6427) (c3a780e)
• internal/librarian: enable structured logging with slog (#6363) (458a738), closes #6338
• internal/postprocessing: add copyFile function (#6364) (8aa57f0), closes #6295
• internal/postprocessing: add removeFile function (#6371) (9e471eb), closes #6296
• internal/postprocessing: add replace and replaceRegex functions (#6412) (ece3aff), closes #6297
• librarian: sync to release-please in add command (#6346) (f1103ae)
• sidekick/rust: add gcp.resource.destination.id and fix incorrect gcp.longrunning.done status in lro traces (#6275) (0648f55)
• sidekick/swift: improve snippet body (#6434) (dcb6e6c)
• sidekick/swift: LRO snippets (#6431) (be95a09)

Bug Fixes

• .github/workflows: fix outdated Java tools path in integration job (#6372) (72a5447)
• golang: fix onboarding versionless paths (#6435) (acd1c2b)
• internal/postprocessing: return error for missing files in RemoveFile (#6408) (4a0e81b)
• librarian/internal/java: preserve released_version for non-snapshot versions during tidy (#6426) (034374c)
• sdk.yaml: enable java sql v1beta4 dual transport (#6437) (ac320d3)
• sidekick/rust: add clippy allow for BigQuery request methods (#6373) (cc804c9)