chore: replace semantic-release with changesets

[phoenix-server]

Summary

• Remove semantic-release and all @semantic-release/* plugins from package.json
• Delete .releaserc.json
• Initialize changesets with .changeset/config.json
• Add changeset-check CI job to checks.yml — fails PRs missing a changeset file
• Create changesets.yml workflow — creates Version PRs on main and publishes releases when merged
• Update README.md — document the new changeset workflow

Why

Changesets give contributors and maintainers explicit control over version bumps and changelog entries at PR time, rather than inferring them from commit message format after the fact.

Test plan

• Verify changeset-check job passes on PRs that include a .changeset/*.md file
• Verify changeset-check job fails on PRs without a changeset (skip on changeset-release/main branch)
• Verify changesets.yml workflow runs on push to main
• Confirm npm run knip passes (no unused deps)
• Confirm npm run build:check passes

Closes#495

🤖 Generated with Claude Code

[coveralls]

coverage: 68.308%. remained the same — chore/replace-semantic-release-with-changesets into main

[Copilot]

Pull request overview

This PR migrates the repository’s release automation from semantic-release to Changesets, shifting version/changelog decisions to PR-time and introducing new CI/workflow automation to enforce and execute that process.

Changes:

• Removed semantic-release configuration/dependencies and added @changesets/cli plus Changesets config.
• Added a PR CI check to require a .changeset/*.md file.
• Introduced a changesets.yml workflow to open version PRs and create GitHub releases on merges.

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
package.json	Removes semantic-release deps; adds Changesets CLI and release-related npm scripts.
README.md	Documents the new Changesets-based versioning and release workflow.
.releaserc.json	Deletes semantic-release configuration.
.github/workflows/checks.yml	Replaces release job with a “changeset required” PR check.
.github/workflows/changesets.yml	Adds Changesets automation to open version PRs and publish releases on main.
.changeset/unreleased-since-v2.1.0.md	Adds a bootstrap changeset capturing accumulated changes since v2.1.0.
.changeset/replace-semantic-release-with-changesets.md	Adds a changeset describing this migration.
.changeset/config.json	Initializes Changesets configuration (base branch, changelog behavior, etc.).

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[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	rimraf@​3.0.2
	sinon@​15.0.1
	ts-node-dev@​1.1.8
	ts-node@​10.9.2
	uuid@​8.3.2
	source-map-support@​0.5.21
	rxjs@​7.8.0
	sinon-chai@​3.7.0
	zod@​3.22.4
	typescript@​5.7.3
	ws@​8.20.0
	redis@​4.5.1
	@​changesets/​cli@​2.31.0

View full report

[Justxd22]

@cameri ready

• Updated PR template to include changeset requirement
• Updated scripts to changeset:version and changeset:tag to avoid conflict with npm built-in publish
• Moved versioning guidance from README.md to CONTRIBUTING.md
• Added instructions for docs-only PRs
• Added missing changes since last release to the changeset