Design

Use to review voice, visual, legal, and partner requirements before publishing social content.

Use to design and document customer segments with clear criteria, metrics, and governance.

Use when planning, approving, and versioning personalized creative assets.

Real-time web research using Gemini's Google Search. Trigger when user needs current information ("search with Gemini", "find current info about X", "what's the latest on Y"), library/API research, security vulnerability lookups, or comparisons requiring recent data.

Use when interpreting company-level enrichment data to segment accounts, spot buying triggers, and tailor outreach.

Use when creating customer stories that prove ROI, highlight use cases, and equip sales with proof.

Use to package concise executive updates, decks, and decision logs for enterprise pursuits.

Use when designing filters, suppression logic, and personalization cohorts for campaigns or automations.

Use when building message houses, key statements, and proof structures for announcements or crises.

Use when producing research-heavy whitepapers or technical guides that require structured argumentation and data.

Use to design measurement, alerting, and reporting for MQL→SQL SLAs.

Use when documenting event objectives, requirements, and alignment across stakeholders.

Use when designing experiments for subject lines, offers, cadences, or journeys.

Add or update automated tests for a change (bugfix, feature, refactor) using the repository’s testing rules in `AGENTS.md`. Use TDD where applicable; derive scenarios from docs/Features/* and ADR invariants; prefer stable integration/API/UI tests, run build before tests, and verify meaningful assertions for happy/negative/edge cases.

Build desktop, web, or terminal UIs with Castella. Create widgets, components, layouts, manage reactive state, handle events, and use the theme system.

Python development best practices including PEP 8 style guidelines, type hints, docstring conventions, and common patterns. Use when writing or modifying Python code.

Applies TDD process, test quality criteria, and mock guidelines. Use when: writing unit tests, using mocks, or reviewing test quality.

Turn the idea for a feature into a fully-formed PRD/design/specification and implementation-plan. Use when you have a spec or requirements that needs implementation. Use in pre-implementation (idea-to-design) stages to make sure you understand the spec/requirements and ensure you have a correct implementation plan before writing actual code.

Guides PRD, ADR, Design Doc, and Work Plan creation. Use when: planning features, writing specs, or creating technical documents.

Use this task to ensure you follow development best practices during development and implementation.