Building a Reborn feature

Start by locating the existing ProductSurface descriptor, route, and caller test. Most WebUI features are already represented by one of these two paths:

read:    WebUI handler -> ProductSurface::query -> ProductView descriptor
write:   WebUI handler -> ProductSurface::invoke -> capability descriptor
         -> query read-back when the result is durable state

The owning crates are:

• ironclaw_assistant: product DTOs, the concrete ProductView and command/capability descriptor instances, and product orchestration.
• ironclaw_product_contracts: the ProductSurface contract, the ProductView/ProductSurfaceCommandDescriptor/ProductCapabilityDescriptor types, and the ProductSurfaceCaller/BoundProductSurface caller binding.
• ironclaw_host_api: shared host-facing error vocabulary (ProductAdapterError).
• ironclaw_webui: route descriptors, handlers, gateway/listener/auth, and the Vite frontend under frontend/.
• ironclaw_composition: production assembly and dependency wiring.
• ironclaw_cli: boot and serve command wiring.

Before editing

Run the graph status check once. If it is missing or stale, use targeted rg searches and verify the result against live code.

bash scripts/codebase-graph.sh status
rg -n "ProductSurface|ProductView|ProductSurfaceCommandDescriptor|ProductCapabilityDescriptor" crates/product/ironclaw_assistant crates/contracts/ironclaw_product_contracts crates/product/ironclaw_webui
rg -n "descriptor|webui_v2_routes|ProductSurface" crates/product/ironclaw_webui/src/webui_v2

Read the owning crate's AGENTS.md, then CLAUDE.md or CONTRACT.md when present. Find the nearest existing descriptor and copy its narrow pattern.

Default implementation

1. Add or reuse a typed ProductView<Params, Output> in crates/product/ironclaw_assistant/src/reborn_services.rs or its owning submodule.
2. Add or reuse a ProductSurfaceCommandDescriptor for typed product commands, or a ProductCapabilityDescriptor for API-only side effects.
3. Implement the backing behavior inside ironclaw_assistant or the owning service. Keep authorization, approval, persistence, and runtime mediation in their existing stages.
4. Add the route descriptor and thin handler in ironclaw_webui. Handlers receive ProductSurfaceCaller and use BoundProductSurface; they do not reach into composition, stores, dispatchers, or runtime lanes.
5. Add the frontend code under crates/product/ironclaw_webui/frontend/src and use the existing API client and page patterns.
6. Wire only genuinely new production dependencies through composition and the CLI. Do not add a builder or Arc field when an existing surface can carry the operation.

Add an abstraction only when it earns its keep

Do not add a feature-specific port, facade method, DTO family, builder field, or adapter by default. Add one only when it provides dependency inversion, two production implementations, a real test seam, a required dyn injection point, or an enforced security/ownership boundary. Record the reason in the PR description and run the architecture test for dependency changes.

Boundary rules

• WebUI handlers consume ProductSurface only. ironclaw_assistant imports in WebUI are limited to wire DTOs and descriptors.
• Composition assembles dependencies; it does not own product policy.
• External input is validated and bounded at the HTTP or adapter boundary.
• Mutations use the capability path and report authoritative evidence; durable state is read back when the contract requires it.
• Identity and scope come from the authenticated caller, never the request body.

Verification

cargo test -p ironclaw_assistant
cargo clippy -p ironclaw_assistant --all-targets --all-features -- -D warnings
cargo test -p ironclaw_webui --all-features
cargo clippy -p ironclaw_webui --all-targets --all-features -- -D warnings
cargo test -p ironclaw_architecture_tests  # when ownership or dependencies change
pnpm --dir crates/product/ironclaw_webui/frontend test

Use a caller-level test for every new route or side effect. Add a whole-path integration test when the feature changes turn execution or cross-layer behavior. Do not add a new test tier solely because a recipe lists it.