feat(opencode): add mcpctl config opencode + /mcpctl TUI switcher with bottom project indicator

scripts/generate-opencode-extension.ts

@@ -0,0 +1,38 @@
+#!/usr/bin/env node
+/**
+ * Generates `src/cli/src/config/opencode-extension.ts`, embedding the opencode
+ * TUI plugin source as a string constant so `mcpctl config opencode` keeps
+ * working from an installed binary with no source tree.
+ *
+ * Regenerate after editing the plugin source:
+ *   npx tsx scripts/generate-opencode-extension.ts
+ */
+import { readFileSync, writeFileSync, mkdirSync } from 'node:fs';
+import { dirname, join } from 'node:path';
+
+const scriptsDir = import.meta.dirname;
+const root = join(scriptsDir, '..');
+const src = readFileSync(join(root, 'src', 'opencode-ext', 'mcpctl-opencode.tsx'), 'utf-8');
+
+function embed(s: string) {
+  // JSON.stringify yields a quoted string literal we can inline directly.
+  return JSON.stringify(s);
+}
+
+const out = `/**
+ * Embedded source of the mcpctl opencode plugin — DO NOT EDIT BY HAND.
+ * Generated by \`npx tsx scripts/generate-opencode-extension.ts\` from
+ * \`src/opencode-ext/mcpctl-opencode.tsx\`.
+ *
+ * \`mcpctl config opencode\` writes it verbatim into the opencode plugin dir and
+ * registers it in opencode.json, so an installed binary with no source tree can
+ * still provision a working opencode integration.
+ */
+export const OPENCODE_PLUGIN_FILENAME = 'mcpctl-switch.tsx' as const;
+
+export const OPENCODE_PLUGIN = ${embed(src)};
+`;
+
+mkdirSync(dirname(join(root, 'src', 'cli', 'src', 'config')), { recursive: true });
+writeFileSync(join(root, 'src', 'cli', 'src', 'config', 'opencode-extension.ts'), out);
+console.log('wrote src/cli/src/config/opencode-extension.ts');