Skill Claude CodeCodex
Test-driven development with bun:test, written for clarity. Produces failing tests FIRST — before any implementation — that read as the executable spec a builder agent implements against. Each test names a single behavior in plain language, follows Arrange–Act–Assert, asserts one thing, and uses real types with no…
Skill Claude CodeCodex
Idiomatic TypeScript conventions and best practices: strict compiler settings, type-level modeling (discriminated unions, branded/nominal types, as const/satisfies, exhaustiveness), unknown over any, immutability, error handling with a Result type, null/undefined hygiene, async/promise rules, module and naming…
Skill Claude CodeCodex
Write, split, and refine agile/scrum user stories and acceptance criteria. Produces /docs/STORIES.md as the canonical backlog, formatted to feed directly into the bdd-specs skill (Story → Feature, Given/When/Then acceptance criteria → Scenario/Specification). Use this whenever the user wants to write a user story…
Instructions file
Claude Code instructions for opagani/cassini-workshop, covering the cassini mission plan mcp and rules.