ci(release): replace changesets with label-driven release automation

Author: Neonsy

.github/labels.yml

@@ -17,9 +17,6 @@
 - name: "automation: lane-sync"
   color: "bfd4f2"
   description: "Automation PR carrying a hotfix into another release lane"
-- name: "automation: changeset-cleanup"
-  color: "d4c5f9"
-  description: "Automation PR removing hotfix changesets after stable consumption"
 - name: "ignore-for-release"
   color: "6a737d"
   description: "Exclude this PR from generated release notes"
@@ -28,6 +25,18 @@
 - name: "release: hotfix"
   color: "b60205"
   description: "Direct-lane hotfix PR intended for expedited release propagation"
+- name: "release:bump:none"
+  color: "c2e0c6"
+  description: "Release-impacting PR with no version bump"
+- name: "release:bump:patch"
+  color: "bfdadc"
+  description: "Release-impacting PR that should produce a patch release"
+- name: "release:bump:minor"
+  color: "fbca04"
+  description: "Release-impacting PR that should produce a minor release"
+- name: "release:bump:major"
+  color: "b60205"
+  description: "Release-impacting PR that should produce a major release"
 
 # Issue Types
 - name: "type: bug"

.github/pull_request_template.md

@@ -10,11 +10,13 @@ Allowed `type`: `build`, `chore`, `ci`, `docs`, `feat`, `fix`, `perf`, `refactor
 Optional `scope`: any lowercase kebab-case token (examples: `api`, `frontend`, `backend`, `electron`, `provider`, `agent`, `tools`, `infra`, `deps`)
 
 Breaking change note:
+
 - Add `!` before `:` to mark breaking intent, for example: `feat(api)!: remove legacy config format`
 - Automation adds `type: breaking` when `!` is present
-- Changesets still determine actual version bump behavior
+- Maintainers must apply exactly one `release:bump:*` label for release-impacting `Project/**` changes
 
 Branch naming note:
+
 - `proto` is allowed for branch names only (`username/proto/short-description`), not as a PR title type
 
 ## Summary
@@ -45,10 +47,10 @@ Branch naming note:
 - [ ] For normal work, base branch is `dev`.
 - [ ] If targeting `prev` or `main`, this is a promotion/release PR requested by a maintainer.
 
-## Changeset Check
+## Release Check
 
-- [ ] This PR touches non-doc files in `Project/**` and includes the required changeset in `Project/.changeset/` (applies to `dev`, `prev`, and `main`).
-- [ ] No changeset is required because this PR is docs-only in `Project/**` (markdown/docs paths) or does not change `Project/**`.
+- [ ] This PR touches release-impacting files in `Project/**`, and exactly one `release:bump:none|patch|minor|major` label is applied.
+- [ ] No release bump label is required because this PR is docs-only in `Project/**` (markdown/docs paths) or does not change `Project/**`.
 
 ## Validation
 
@@ -88,7 +90,8 @@ Branch naming note:
 > I hereby swear I used AI responsibly and verified these changes are correct (not blind AI copy/apply slop).
 
 > [!IMPORTANT]
-> - [ ] I hereby swear to have only used AI in things I have *enough* expertise in.
+>
+> - [ ] I hereby swear to have only used AI in things I have _enough_ expertise in.
 
 <!--
 ## Get in Touch

.github/scripts/hotfix-sync-metadata.mjs

@@ -1,4 +1,5 @@
 export const HOTFIX_SYNC_METADATA_MARKER = "hotfix-sync-metadata";
+const RELEASE_BUMP_VALUES = new Set(["none", "patch", "minor", "major"]);
 
 function normalizeString(value) {
   return typeof value === "string" ? value.trim() : "";
@@ -24,6 +25,11 @@ function normalizeNumber(value) {
   return null;
 }
 
+function normalizeReleaseBump(value) {
+  const normalized = normalizeString(value).toLowerCase();
+  return RELEASE_BUMP_VALUES.has(normalized) ? normalized : "none";
+}
+
 export function normalizeHotfixSyncMetadata(value) {
   if (!value || typeof value !== "object") {
     throw new Error("Hotfix sync metadata must be an object.");
@@ -37,7 +43,8 @@ export function normalizeHotfixSyncMetadata(value) {
   const originBase = normalizeString(value.origin_base);
   const originHead = normalizeString(value.origin_head);
   const originMergeSha = normalizeString(value.origin_merge_sha);
-  const changesetFiles = normalizeStringArray(value.changeset_files);
+  const carriedLabels = normalizeStringArray(value.carried_labels);
+  const releaseBump = normalizeReleaseBump(value.release_bump);
 
   if (!originBase || !originHead || !originMergeSha) {
     throw new Error(
@@ -50,8 +57,8 @@ export function normalizeHotfixSyncMetadata(value) {
     origin_base: originBase,
     origin_head: originHead,
     origin_merge_sha: originMergeSha,
-    changeset_files: changesetFiles,
-    changeset_consumed_by_main: value.changeset_consumed_by_main === true,
+    release_bump: releaseBump,
+    carried_labels: carriedLabels,
   };
 }