Error Handling & Diagnostics

Use this skill whenever you add, change, or review an error path: a build-time authoring error, a parser/handler failure, a CLI validation error, or anything surfaced to a host (FFI/WASM/Node) or a tool/agent. WebUI errors must be recoverable, actionable, and machine-consumable — for humans and AI agents alike.

1 - Never panic on recoverable input

panic = "abort" in the release profile means a panic kills the process instantly — including any FFI/WASM/Node host embedding the framework. Bad template input, bad CLI input, and bad state are recoverable and must return Result, never panic!/unwrap()/expect().