fix: make GitHub releases canonical for release-please (#295)

tests/release-config.test.ts

@@ -0,0 +1,39 @@
+import { describe, expect, test } from "bun:test"
+import { validateReleasePleaseConfig } from "../src/release/config"
+
+describe("release-please config validation", () => {
+  test("rejects upward-relative changelog paths", () => {
+    const errors = validateReleasePleaseConfig({
+      packages: {
+        ".": {
+          "changelog-path": "CHANGELOG.md",
+        },
+        "plugins/compound-engineering": {
+          "changelog-path": "../../CHANGELOG.md",
+        },
+      },
+    })
+
+    expect(errors).toHaveLength(1)
+    expect(errors[0]).toContain('Package "plugins/compound-engineering"')
+    expect(errors[0]).toContain("../../CHANGELOG.md")
+  })
+
+  test("allows package-local changelog paths and skipped changelogs", () => {
+    const errors = validateReleasePleaseConfig({
+      packages: {
+        ".": {
+          "changelog-path": "CHANGELOG.md",
+        },
+        "plugins/compound-engineering": {
+          "skip-changelog": true,
+        },
+        ".claude-plugin": {
+          "changelog-path": "CHANGELOG.md",
+        },
+      },
+    })
+
+    expect(errors).toEqual([])
+  })
+})