fix: beta resolver typecheck + build smoke check

[Hona]

No description provided.

[Copilot]

Pull request overview

Updates the beta-branch merge automation script to improve conflict-resolution prompts and add an end-of-run typecheck/build smoke verification for packages/opencode.

Changes:

• Refactors repeated PR-list formatting into a shared lines(prs) helper.
• Enhances the conflict-resolution prompt to require a bun typecheck pass after resolving conflicts.
• Adds a smoke() step after merging to run bun typecheck and ./script/build.ts --single, with optional auto-fix + commit if the working tree is dirty.

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[Copilot]

./script/build.ts --single in packages/opencode performs network fetches (models.dev) and generates/updates src/provider/models-snapshot.*. With the current git status/git add -A flow below, the smoke check can end up committing unrelated/generated snapshot changes (or new files) to the beta branch even when merges are otherwise clean. Consider making the build step deterministic for this script (e.g., pass MODELS_DEV_API_JSON/pin the snapshot), or explicitly restore/clean generated snapshot files before deciding whether to commit smoke fixes.

[Copilot]

build.ts supports --skip-install, but the smoke check currently runs it without that flag. Because build.ts runs bun install by default, this smoke step can mutate bun.lockb/dependency state and then the later git add -A can commit those lockfile changes. If the goal is a build smoke test (not dependency updates), consider invoking ./script/build.ts --single --skip-install here.

[Copilot]

The smoke check auto-commits any dirty working tree via git add -A / git commit. As written, this can accidentally include files outside the intended smoke-fix scope (e.g., untracked/generated files created during the smoke commands). Consider restricting what gets staged (limit to known paths) or failing with a clear message listing git status --porcelain entries so a human can review, rather than committing everything blindly.

Suggested change

	try {
	await $`git add -A`
	// Only allow auto-committing changes within packages/opencode.
	// If there are changes elsewhere, list them and abort so a human can review.
	const statusLines = out.trim().split("\n")
	const unsafeChanges = statusLines.filter((line) => {
	// Porcelain format: "XY path" (at least 3 chars; path may contain spaces but starts at index 3).
	const path = line.length > 3 ? line.slice(3).trim() : ""
	return !(path === "packages/opencode" || path.startsWith("packages/opencode/"))
	})
	if (unsafeChanges.length > 0) {
	console.log("Smoke check produced changes outside packages/opencode; refusing to auto-commit.")
	console.log("Please review and handle these changes manually:")
	console.log(unsafeChanges.join("\n"))
	return false
	}
	try {
	await $`git add packages/opencode`