refactor(ultrawork): simplify workflow and apply parallel context gathering (#1412)
* refactor(ultrawork): simplify workflow to natural tool-like agent usage
Restore beta.16 style where explore/librarian agents feel like tools:
- Simplify delegate_task examples (agent=, background=true)
- Remove verbose DATA DEPENDENCIES explanation
- Condense EXECUTION RULES to action-oriented bullets
- Simplify WORKFLOW to 4 clear steps
- Remove procedural constraints that discouraged parallel exploration
The goal: agents fire background tasks AND continue direct exploration,
rather than waiting passively for background results.
* refactor(ultrawork/gpt5.2): apply two-track parallel context gathering
Based on GPT-5.2 Prompting Guide recommendations:
- 'Parallelize independent reads to reduce latency'
- Fire background agents (explore, librarian) for deep search
- Use direct tools (Grep, Read, LSP) simultaneously for quick wins
- Collect and merge ALL findings for comprehensive context
Pattern: background fire → direct exploration in parallel → collect → proceed
* fix: address Cubic review feedback
- Fix delegate_task parameter names in default.ts (agent → subagent_type, background → run_in_background)
- Add missing load_skills and run_in_background parameters to delegate_task examples
- Restore new_task_system_enabled property to schema and TypeScript config
- Fix tool names in gpt5.2.ts (Grep → grep, Read → read_file)
Identified by cubic (https://cubic.dev)