implement-batchlisted

Use the current user request as this skill's input. In Claude Code invoke it as `/ufil:implement-batch`; in Codex invoke it as `$ufil:implement-batch`. Resolve `UFIL_ROOT` to the plugin root containing this skill; Claude Code may provide `CLAUDE_PLUGIN_ROOT`, while Codex can resolve it from the installed skill path. Use the client's native subagent capability; do not hardcode one client's tool call schema. Implement multiple features in parallel using auto-scaled agents. Arguments: <requested arguments> (space-separated feature names or ticket IDs) ## Step -1: Initialize Serena (auto-onboard if needed) Run in order at session start, BEFORE spawning any agents: 1. Call `mcp__serena__initial_instructions`. 2. Call `mcp__serena__check_onboarding_performed`. 3. **If not onboarded:** - Probe for code: `find . -maxdepth 3 -type f -name '*.dart' -not -path '*/.*' | head -1` - If a Dart file is found → call `mcp__serena__onboarding` (one-time per project). - If empty → SKIP onboarding; tell the user: "Serena onboarding skipped — no Dart code detected. Will auto-run on the next implement-batch workflow once code exists." Subagents will fall back to built-in search and read tools. 4. **If already onboarded:** proceed. Onboarding must happen BEFORE parallel agents spawn so they inherit a ready symbol index instead of racing to onboard concurrently. To force re-onboarding, invoke the `serena-refresh` skill. ## Project Type Detection (MUST DO FIRST) - **Modular**: `packag