fix: validate upstream changeset range start

.changeset/opencode-v1-14-51-to-v1-15-4.md

@@ -1,6 +1,6 @@
 ---
-"@kilocode/cli": minor
-"kilo-code": minor
+"@kilocode/cli": patch
+"kilo-code": patch
 ---
 
 Changes from opencode v1.14.51 to v1.15.4 upstream:

script/upstream/README.md

@@ -69,7 +69,7 @@ After merging upstream opencode releases, use `opencode-changesets.ts` to turn t
 bun script/upstream/opencode-changesets.ts --from 1.17.0 --to 1.17.7
 ```
 
-The script fetches releases from `anomalyco/opencode`, selects published releases in the semver range `(from, to]`, and writes one `.changeset/opencode-vX-Y-Z-to-vX-Y-Z.md` file for the whole range. It requires the target release to exist, merges notes from every release into shared `##` sections and `###` categories, then folds those headings into each bullet (for example, `Core Bugfixes: ...`) so Changesets can embed the notes cleanly in package changelogs. It generates a minor changeset for the fixed release group, `@kilocode/cli` and `kilo-code`. Generated notes omit contributor thank-you blocks and the upstream `Desktop` and `SDK` sections by default because Kilo does not ship the opencode desktop app and SDK release notes are not user-facing for Kilo.
+The script fetches releases from `anomalyco/opencode`, selects published releases in the semver range `(from, to]`, and writes one `.changeset/opencode-vX-Y-Z-to-vX-Y-Z.md` file for the whole range. It requires the target release to exist, merges notes from every release into shared `##` sections and `###` categories, then folds those headings into each bullet (for example, `Core Bugfixes: ...`) so Changesets can embed the notes cleanly in package changelogs. It generates a patch changeset for the fixed release group, `@kilocode/cli` and `kilo-code`. Generated notes omit contributor thank-you blocks and the upstream `Desktop` and `SDK` sections by default because Kilo does not ship the opencode desktop app and SDK release notes are not user-facing for Kilo.
 
 ## Merge Process
 

script/upstream/opencode-changesets.test.ts

@@ -28,12 +28,16 @@ describe("opencode changesets", () => {
     expect(() => select(releases, "1.2.0", "99.9.9")).toThrow("Target opencode release does not exist")
   })
 
+  test("requires the starting release to exist", () => {
+    expect(() => select(releases, "1.1.9", "1.2.3")).toThrow("Starting opencode release does not exist")
+  })
+
   test("formats changeset markdown", () => {
     expect(
       changeset([{ tag_name: "v1.2.2", body: "\r\n## Core\r\n\r\n- Fix issue\r\n" }], "1.2.1", "1.2.2"),
     ).toBe(`---
-"@kilocode/cli": minor
-"kilo-code": minor
+"@kilocode/cli": patch
+"kilo-code": patch
 ---
 
 Changes from opencode v1.2.1 to v1.2.2 upstream:
@@ -67,8 +71,8 @@ Changes from opencode v1.2.1 to v1.2.2 upstream:
         },
       ], "1.2.1", "1.2.2"),
     ).toBe(`---
-"@kilocode/cli": minor
-"kilo-code": minor
+"@kilocode/cli": patch
+"kilo-code": patch
 ---
 
 Changes from opencode v1.2.1 to v1.2.2 upstream:
@@ -116,8 +120,8 @@ Changes from opencode v1.2.1 to v1.2.2 upstream:
         },
       ], "1.2.0", "1.2.2"),
     ).toBe(`---
-"@kilocode/cli": minor
-"kilo-code": minor
+"@kilocode/cli": patch
+"kilo-code": patch
 ---
 
 Changes from opencode v1.2.0 to v1.2.2 upstream:
@@ -148,8 +152,8 @@ Changes from opencode v1.2.0 to v1.2.2 upstream:
         },
       ], "1.2.1", "1.2.2"),
     ).toBe(`---
-"@kilocode/cli": minor
-"kilo-code": minor
+"@kilocode/cli": patch
+"kilo-code": patch
 ---
 
 Changes from opencode v1.2.1 to v1.2.2 upstream:

script/upstream/opencode-changesets.ts

@@ -24,7 +24,7 @@ type Group = Map<string, Map<string, string[]>>
 
 const repo = "anomalyco/opencode"
 const pkgs = ["@kilocode/cli", "kilo-code"]
-const bump: Bump = "minor"
+const bump: Bump = "patch"
 const drop = ["Desktop", "SDK"]
 
 const usage = `
@@ -184,11 +184,21 @@ export function select(releases: Release[], from: string, to: string) {
   if (semver.gt(base, head) || base === head) throw new Error(`Expected from version to be lower than to version`)
 
   const seen = new Set<string>()
-  const selected = releases
+  const published = releases
     .filter((release) => !release.draft)
     .filter((release) => !release.prerelease)
     .map((release) => ({ release, version: semver.valid(release.tag_name.replace(/^v/, "")) }))
     .filter((item): item is { release: Release; version: string } => Boolean(item.version))
+
+  if (!published.some((item) => item.version === base)) {
+    throw new Error(`Starting opencode release does not exist or is not published: ${tag(base)}`)
+  }
+
+  if (!published.some((item) => item.version === head)) {
+    throw new Error(`Target opencode release does not exist or is not published: ${tag(head)}`)
+  }
+
+  return published
     .filter((item) => {
       if (seen.has(item.version)) return false
       seen.add(item.version)
@@ -196,12 +206,6 @@ export function select(releases: Release[], from: string, to: string) {
     })
     .sort((a, b) => semver.compare(a.version, b.version))
     .map((item) => ({ ...item.release, tag_name: tag(item.version) }))
-
-  if (!selected.some((release) => release.tag_name === tag(head))) {
-    throw new Error(`Target opencode release does not exist or is not published: ${tag(head)}`)
-  }
-
-  return selected
 }
 
 export function changeset(releases: Release[], from: string, to: string) {