v0.18.0

New Features

• Devtools — Five new packages for inspecting json-render apps in the browser: @json-render/devtools (framework-agnostic core), plus @json-render/devtools-react, @json-render/devtools-vue, @json-render/devtools-svelte, and @json-render/devtools-solid adapters. Drop <JsonRenderDevtools /> into your app to get a shadow-DOM-isolated panel with six tabs (Spec, State, Actions, Stream, Catalog, Pick), a DOM picker that maps clicked elements back to spec keys via data-jr-key, a capped event store, and server-side stream tap utilities. Floating toggle or Cmd/Ctrl + Shift + J, tree-shakes to null in production (#273)
• Devtools example — New examples/devtools Next.js demo showing the full devtools panel wired up to an AI chat endpoint and a component catalog (#273)
• Action observer and devtools flag in core — @json-render/core now exposes an action observer and a devtools enablement flag that adapters use to mirror actions and stream events into the panel (#273)

Bug Fixes

• Zod 4 schema formatting — formatZodType now correctly handles z.record(), z.default(), and z.literal() types from Zod 4, which previously produced incorrect or empty output in generated prompts and schemas (#239)

Improvements

• Zod 4 test coverage — Added unit tests for formatZodType covering record, default, and literal types to guard against regressions (#272)

Contributors

• @ctate
• @mvanhorn