add-feature

name	add-feature
description	Use when implementing any new feature in dicebag. Enforces the full implementation checklist: core Rust logic first, then WASM bindings, CLI command, webapp action, UI, and TypeScript interface sync. Invoke whenever the user asks to add, build, or implement something new.

Add Feature

Implement the following feature: $ARGUMENTS

Work through these steps in order. Complete each layer before moving to the next — every feature must be reachable from both the CLI and the webapp.

Implementation checklist

1. Core (core/src/)

• Add the data structures, methods, and business logic in the appropriate module(s)
• No file I/O, no side effects — keep core pure so it compiles to WASM
• Write unit tests for any non-trivial logic
• If mutating more than one field, encapsulate it as a method rather than doing it inline elsewhere

2. WASM bindings (wasm/src/lib.rs)

• Expose any new core types or methods needed by the webapp via wasm-bindgen
• Prefer generic bindings over per-variant functions (e.g. one function with a parameter, not one function per case)
• Run pnpm wasm from webapp/ to rebuild and verify it compiles

3. CLI (cli/src/)

• Add a subcommand (or extend an existing one) in cli/src/main.rs and the relevant file under cli/src/commands/
• The CLI must be able to exercise the new core functionality end-to-end
• Update the CLI commands table in CLAUDE.md if adding a new subcommand

4. Webapp action (webapp/src/actions/index.ts)

• Add an Astro Action for any mutation (create, update, delete)
• I/O only in the action: read file → pass to WASM → mutate via core method → serialize via WASM → write file
• No business logic in TypeScript — if you find yourself computing something, stop and put it in core

5. Webapp UI (webapp/src/pages/)

• Wire up the new action to the relevant page(s)
• Use existing UI patterns (Bulma, astro-bulma components)

6. TypeScript interfaces (webapp/src/lib/campaigns.ts)

• If core types changed, update the corresponding TypeScript interfaces here

7. Final checks

• cargo test passes
• Both the CLI and the webapp can exercise the feature