tui: JSX syntax in plugin .tsx files breaks npm-installed plugins (bun-injected @opentui/solid/jsx-dev-runtime import can't resolve) #50095

Summary

A TUI plugin installed via opencode plugin <npm-package> --global silently fails to load when its .tsx source uses JSX syntax. The @opentui/solid/jsx-dev-runtime specifier that is injected by bun's native JSX transform is resolved natively relative to the plugin file (bypassing the runtime-plugin rewrite loader), and npm-installed plugins live under ~/.cache/opencode/packages/<pkg>@<ver>/node_modules/<pkg>/, which has no upward @opentui to resolve against. Result: Cannot find package '@opentui/solid', consumed as a silent no-op (no sidebar, no plugin entry) — that's #41574's diagnostic gap in action.

Root cause (debugged)

Running the plugin outside the dev overlay (~/.cache/opencode/packages/...):

• Loading the npm ./tui entry with JSX present → IMPORT FAILED: Cannot find package '@opentui/solid'.
• The REWRITE-LOADER in the runtime-plugin support fires for the file itself, but not for the dev-runtime import bun injects, because that injection happens in the native transform after rewriting (or is resolved by a code path that ignores plugin resolvers).
• Removing every JSX expression and importing jsxDEV explicitly from "@opentui/solid/jsx-dev-runtime" makes the same file import cleanly from the identical cache location: the explicit import is a runtime specifier → rewritten to the correct virtual module. Confirmed in 1.18.31's install-store layout.

So the bug is specifically: JSX syntax in plugin sources is unsupported for npm-installed plugins, while repo/dev-overlay plugins work because their location happens to resolve upward into the app's node_modules.

The same failure likely underlies parts of #33884 (npm-spec plugins silently failing) and the "render once / never updates" #48883 path.

Repro

1. opencode plugin opencode-token-min --global (uses exports["./tui"], verified on 1.18.31).
2. The installed copy at ~/.cache/opencode/packages/opencode-token-min@<ver>/node_modules/opencode-token-min/tui/token-min.tsx contains <box>/<text> JSX.
3. Start a TUI session → no sidebar from the plugin; nothing in logs.
4. Import the file through the runtime-plugin support from that path → Cannot find package '@opentui/solid'.

Suggested fixes (any one)

• Run the plugin-rewrite loader after the native TSX transform so injected dev-runtime specifiers are also rewritten.
• Make the rewrite loader catch specifier rewrites for injected imports (resolve @opentui/... against the host runtime).
• If neither is feasible, at least surface the load failure in logs (tui: a plugin that fails to load or initialize produces no diagnostic at any log level #41574) instead of failing silently.

Workaround (no runtime change needed)

Keep plugin sources JSX-free: import { jsxDEV } from "@opentui/solid/jsx-dev-runtime" and build elements with jsxDEV("box", { children: [...] }). Added to opencode-token-min v1.0.2.

Context: related #27447, #48883, #33884, #41574, #39986.
Debugging performed by the opencode agent (Big Pickle), supervised by tmiland.