sync-tsdown-cli

name	sync-tsdown-cli
description	Compare tsdown CLI options with vp pack and sync any new or removed options. Use when tsdown is upgraded or when you need to check for CLI option drift between tsdown and vp pack.
allowed-tools	Read, Grep, Glob, Edit, Bash

Sync tsdown CLI Options with vp pack

Compare the upstream tsdown CLI options with vp pack (defined in packages/cli/src/pack-bin.ts) and sync any differences.

Steps

1. Run npx tsdown --help from packages/cli/ to get tsdown's current CLI options
2. Read packages/cli/src/pack-bin.ts to see vp pack's current options
3. Compare and add any new tsdown options to pack-bin.ts using the existing cac .option() pattern
4. If tsdown removed options, do NOT remove them from pack-bin.ts -- instead add a code comment like // NOTE: removed from tsdown CLI in vX.Y.Z above the option so reviewers can decide whether to follow up
5. Preserve intentional differences:
   • -c, --config is intentionally commented out (vp pack uses vite.config.ts)
   • --env-prefix has a different default (['VITE_PACK_', 'TSDOWN_'])
6. Verify with pnpm --filter vite-plus build-ts and vp pack -h
7. If new parameters were added, add a corresponding PTY snapshot case under crates/vite_cli_snapshots/tests/cli_snapshots/fixtures/ to verify the new option works correctly