[pratikbuilds]

Summary

Narrows the react and react-dom peer range to ^19.0.0 and drops the React 18 claims from the README and the Panel docs (finding 20). Many components take ref as a plain prop, which only reaches them on React 19.

Breaking: consumers must be on React 19.

Verification

• bun run check
• bun.lock is updated to the new peer range.

Closes #142

[TheGreatAxios]

Review · Request changes

Narrows the react and react-dom peer dependency range to ^19.0.0 and removes React 18 support claims from README.md and Panel's JSDoc.

Findings

• CONTRIBUTING.md:37 — Peer and dependency range changes use build(deps): with no ! ("Add ! only for public API breaks: removed or renamed exports, changed signatures, newly required params. Peer and dependency range changes are build(deps): with no !."). Could we retitle the commit and PR from feat!: require React 19 to build(deps): require React 19?
• src/ui/panel.tsx:30 — This commit removes "on React 18 and 19" from Panel's JSDoc at line 90, but leaves HIDDEN_PANE_PROPS: Record<string, string> = { inert: "inert" } (lines 30–34 and 423) in the same file, which exists only because React 18 dropped boolean inert. Under React 19, PanelPane can pass inert={!shown} directly on the <div> and remove HIDDEN_PANE_PROPS.
• src/ui/conversation.tsx:969 (informational) — ConversationItem still keeps a release ref fallback and comment for React 18's null-ref detach alongside the React 19 cleanup return (and src/ui/conversation.test.tsx:312, src/ui/attachments.test.tsx:137, src/ui/message.test.tsx:557, src/ui/prompt-input.test.tsx:133 still carry React 18 forwardRef comments).