opencode

internal/opencode/plugin.go

@@ -0,0 +1,40 @@
+// Package opencode provides OpenCode plugin management.
+package opencode
+
+import (
+	"embed"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+//go:embed plugin/gastown.js
+var pluginFS embed.FS
+
+// EnsurePluginAt ensures the Gas Town OpenCode plugin exists.
+// If the file already exists, it's left unchanged.
+func EnsurePluginAt(workDir, pluginDir, pluginFile string) error {
+	if pluginDir == "" || pluginFile == "" {
+		return nil
+	}
+
+	pluginPath := filepath.Join(workDir, pluginDir, pluginFile)
+	if _, err := os.Stat(pluginPath); err == nil {
+		return nil
+	}
+
+	if err := os.MkdirAll(filepath.Dir(pluginPath), 0755); err != nil {
+		return fmt.Errorf("creating plugin directory: %w", err)
+	}
+
+	content, err := pluginFS.ReadFile("plugin/gastown.js")
+	if err != nil {
+		return fmt.Errorf("reading plugin template: %w", err)
+	}
+
+	if err := os.WriteFile(pluginPath, content, 0644); err != nil {
+		return fmt.Errorf("writing plugin: %w", err)
+	}
+
+	return nil
+}

internal/opencode/plugin/gastown.js

@@ -0,0 +1,32 @@
+// Gas Town OpenCode plugin: hooks SessionStart/Compaction via events.
+export const GasTown = async ({ $, directory }) => {
+  const role = (process.env.GT_ROLE || "").toLowerCase();
+  const autonomousRoles = new Set(["polecat", "witness", "refinery", "deacon"]);
+  let didInit = false;
+
+  const run = async (cmd) => {
+    try {
+      await $`/bin/sh -lc ${cmd}`.cwd(directory);
+    } catch (err) {
+      console.error(`[gastown] ${cmd} failed`, err?.message || err);
+    }
+  };
+
+  const onSessionCreated = async () => {
+    if (didInit) return;
+    didInit = true;
+    await run("gt prime");
+    if (autonomousRoles.has(role)) {
+      await run("gt mail check --inject");
+    }
+    await run("gt nudge deacon session-started");
+  };
+
+  return {
+    event: async ({ event }) => {
+      if (event?.type === "session.created") {
+        await onSessionCreated();
+      }
+    },
+  };
+};