feat(website): publish prerelease changelogs

[benvinegar]

Summary

• publish dated prereleases on their minor-series changelog page, index, RSS feed, and social card
• keep undated prerelease preparation invisible until its tag exists
• keep latest.json, the landing ribbon, the Latest marker, and install guidance pinned to the newest stable release
• give each prerelease an exact anchored RSS GUID so the eventual stable release still reaches subscribers as a new item
• update the release workflow and changelog documentation for beta publication

This immediately publishes 0.21.0-beta.0 at /changelog/0.21/#v0-21-0-beta-0 and backfills the historical 0.18.0-beta.0 notes.

Generated surfaces

• new Hunk 0.21 prerelease page and social card
• updated changelog index, RSS feed, date map, and index card
• updated Hunk 0.18 page/card with its historical beta
• unchanged stable landing metadata (0.20.1 remains latest)

Validation

• bun run test — 2,138 passed, 3 skipped
• bun test scripts/generate-changelog.test.ts — 99 passed
• bun run typecheck
• bun run lint
• bun run deps:check
• bun run check:changelog
• bun run website:build
• bun run website:links
• bun run --cwd website test:browser -- tests/changelog-smoke.spec.ts — 22 passed
• targeted oxfmt --check
• git diff --check

Tested on Linux. The generated pages were exercised in desktop and mobile Chromium.

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

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Project	Deployment	Actions	Updated (UTC)
hunk-web	Ready	Preview	Aug 31, 2026 10:31pm

[greptile-apps]

Greptile Summary

This PR publishes dated prerelease changelogs while keeping stable release promotion and installation guidance pinned to the newest stable version.

• Separates general publication state from stable-release promotion.
• Adds prerelease pages, index metadata, social cards, and exact-version RSS entries.
• Keeps undated prereleases hidden and updates release documentation, generated artifacts, and regression coverage.

Confidence Score: 5/5

The PR appears safe to merge with prerelease publication correctly isolated from stable release promotion.

Dated prereleases reach the intended generated surfaces, undated prereleases remain excluded, stable installation and latest metadata remain pinned, and the new RSS identifiers are distinct and resolve to emitted anchors.

Important Files Changed

Filename	Overview
scripts/generate-changelog.ts	Separates dated publication from stable promotion and consistently applies the distinction across pages, cards, RSS, and latest metadata.
scripts/generate-changelog.test.ts	Adds focused coverage for prerelease visibility, stable promotion, RSS GUIDs, ordering, generated dates, and beta-only series.
skills/hunk-release/SKILL.md	Updates post-tag release instructions so prereleases regenerate and publish changelog surfaces without advancing stable channels.
website/tests/changelog-smoke.spec.ts	Extends browser coverage to the generated prerelease pages, anchors, feed, and stable latest markers.
website/public/changelog/rss.xml	Adds exact-anchor feed items for the current and historical prereleases while retaining stable series GUIDs.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
  Changelog[CHANGELOG release entry] --> Date{Recorded tag date?}
  Date -->|No, prerelease| Hidden[No generated prerelease surfaces]
  Date -->|No, stable| Unreleased[Visible as Unreleased]
  Date -->|Yes| Published[Publish series page and index entry]
  Published --> Kind{Stable release?}
  Kind -->|Prerelease| Beta[Exact-anchor RSS item and prerelease card]
  Kind -->|Stable| Stable[Series RSS item and install guidance]
  Stable --> Latest[May advance Latest metadata and ribbon]
  Beta --> Pinned[Stable Latest metadata remains unchanged]

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