chore(release): prepare v0.21.0-beta.1

[benvinegar]

Summary

• prepare hunkdiff 0.21.0-beta.1 from the current main prerelease state
• consume the 14 Changesets added since 0.21.0-beta.0 and generate the beta.1 changelog
• commit an 11-sample Linux x64 release benchmark snapshot

Release contract

• version: 0.21.0-beta.1
• intended tag: v0.21.0-beta.1
• previous tag: v0.21.0-beta.0
• npm channel: beta
• GitHub Latest: unchanged

The benchmark gate passes against 0.20.1. The snapshot carries forward the approved beta.0 wrapped-CJK mount exception: beta.1 improves that local median from 96.52 ms to 91.21 ms, and all metrics pass when compared directly with beta.0.

Validation

• bun install --frozen-lockfile
• bun run typecheck
• bun run lint
• bun run format:check
• bun run deps:check
• bun run test — 1,793 passed, 2 skipped
• bun run test:integration — 140 passed, 1 skipped
• bun run test:tty-smoke — 9 passed
• bun run test:session-broker-node — 4 passed
• real 140×40 tmux TTY smoke on the release diff
• bun run check:docs
• bun run check:changelog
• bun run bench:release -- --samples 11
• bun run bench:release:compare
• beta.1 benchmark comparison against beta.0
• bun run check:pack
• bun run build:prebuilt:npm
• bun run check:prebuilt-pack
• bun run smoke:prebuilt-install
• full Firecracker install compatibility suite — 15/15 scenarios passed
• validate-release-result.ts accepted the exact release-tip evidence

Firecracker evidence: tmp/install-vm/runs/release-0.21.0-beta.1-m2nSHE09/result.json (SHA-256 5ad04877727dd8c58ecc5aed15172bb8404093518d54c43826eefaefd2897fac). The evidence attests checkout identity 3312cec760fb79ac8cfd90a67b607bdeee881515e76df37dc2c43ef09a23f8f1 from release commit c3ddc7a084646ac6b19397fef3ece3d3689f458b.

No tag or publication has been triggered.

This PR description was generated by Pi using OpenAI Codex gpt-5.6-sol

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Project	Deployment	Actions	Updated
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[greptile-apps]

Greptile Summary

Prepares the hunkdiff 0.21.0-beta.1 prerelease with consistent release metadata.

• Advances the package version and Changesets prerelease state.
• Adds the beta.1 changelog entries.
• Records the 11-sample Linux x64 release benchmark snapshot and carries forward the documented wrapped-CJK exception.

Confidence Score: 5/5

The PR appears safe to merge, with its prerelease metadata, changelog, and benchmark snapshot internally consistent.

No concrete blocking or independently actionable non-blocking defects remain after accounting for the explicitly documented benchmark exception.

Important Files Changed

Filename	Overview
package.json	Advances the package version from 0.21.0-beta.0 to 0.21.0-beta.1 consistently with the other release artifacts.
.changeset/pre.json	Marks the 14 changesets consumed by beta.1; release-bearing changesets correspond to the generated changelog entries.
CHANGELOG.md	Adds one minor and six patch entries for 0.21.0-beta.1 with consistent PR and commit references.
benchmarks/release/bench-0.21.0-beta.1.json	Adds the expected 11-sample Linux x64 benchmark snapshot with matching package version and a documented carried-forward exception.

_{Reviews (1): Last reviewed commit: "chore(release): prepare v0.21.0-beta.1" | Re-trigger Greptile}