[syn7xx]

Fixes #17.

What and why

With the plugin loaded, the built-in question tool stopped rendering in the parent/main client window: the form was emitted but the option list never appeared, so the session hung. Reproducible in an ordinary session with no Workflow running — merely having the plugin connected was enough.

Root cause: the plugin wrapped the built-in question tool with ctx.tool.transform → editor.update("question", …). On OpenCode 2.0.23 that makes form.created fire without a location. A location-scoped client (every ordinary session) then drops the form, so the options never render. Even a no-op update triggered it; editor.update("bash", …) and editor.add(…) did not.

The fix stops transforming question globally:

• adds a dedicated workflow_question tool that routes a Unit's questions through the Run's broker (broker-routed, so the answer reaches whatever surface is watching — TUI, web, or any RPC client — instead of a blocking native form);
• in the context hook, hides workflow_question outside Unit sessions and hides the native question inside Units;
• pushes a QUESTION_INSTRUCTION to Units and allows workflow_question / denies question in ENGINE_UNIT_RULES;
• drops the now-unneeded execute.after fallback hook.

Ordinary sessions keep the untouched native question, so its form renders with the full location.

How I tested it

• bun run check — format, lint, typecheck, 292 tests, 0 fail.
• Live, through a symlinked checkout plugin on a real OpenCode 2.0.23 (Linux):
  • ordinary session: the native question tool renders its options in the TUI ("1. Red / 2. Blue / 3. Type your own answer"); form.created carries location={directory:"/tmp/wf-repro"}.
  • headless Unit: workflow_question reports nobody available and the Unit proceeds (COLOUR=none).
  • attached Unit: answering the broker interaction via replyInteraction returns the answer (COLOUR=Blue).

Checklist

• The title follows Conventional Commits (fix:)
• bun run check passes
• Protocol changes are additive and the schemas are regenerated (bun run schemas — no diff)
• Docs (README, skill, protocol) updated if behavior or options changed