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release: prepare Browser Eval 0.5.0 - #271

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Nov 11, 2026
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Browser Eval 0.5.0

Release preparation for Browser Eval 0.5.0, the first release whose version also names the Web Fetch benchmark edition, following the rules in docs/releases.md (#264).

Why minor: scores can change while the 550 tasks stay the same. Three things changed since 0.4.0:

Rescore saved 0.4.0 results before comparing them with 0.5.0.

Changes:

  • Dataset pin: LexBench-Web-Fetch moves to v2.2.0, commit c12559d2 (HF Harden Web Fetch report rebuild and review #7), via make pin-dataset.
    • Task hashes are unchanged from 46d91071.
    • Only the archive changes, because it bundles VERSIONING.md.
    • The previous pin moves to history.
  • Version: pyproject.toml and uv.lock are set to 0.5.0.
  • Scorer record: RELEASED_SCORERS["0.5.0"] = d0c5f12a…2e2b. lexbench-webfetch version now prints 0.5.0, status: released. The versions.py hash is refreshed in code-migration.json.
  • Release table: docs/releases.md now lists 0.4.0 and 0.5.0 with their Web Fetch and Web Search dataset commits.

Checks: release, metadata, package and benchmark tests pass locally (11,694 + 143). After merge, I'll tag v0.5.0 on the merge commit and publish the GitHub release with the wheel, the sdist and SHA256SUMS.

Not included: #268 (main/full content scopes) changes scoring and will need 0.6.0.

Pin LexBench-Web-Fetch v2.2.0 (c12559d2), set the package version to
0.5.0, record its scoring-source hash in RELEASED_SCORERS and index 0.4.0
and 0.5.0 in the release table.

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✅ Review complete · dd4426b

No findings in this review.

@lanyue-llk
lanyue-llk merged commit f3c30da into main Nov 11, 2026
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@lanyue-llk
lanyue-llk deleted the release/v0.5.0 branch November 11, 2026 07:29
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