feat: set prune tool as a primary tool

Author: spoons-and-mirrors

index.ts

@@ -75,6 +75,18 @@ const plugin: Plugin = (async (ctx) => {
     }
 
     return {
+        config: async (opencodeConfig) => {
+            // Add prune to primary_tools by mutating the opencode config
+            // This works because config is cached and passed by reference
+            if (config.strategies.onTool.length > 0) {
+                const existingPrimaryTools = opencodeConfig.experimental?.primary_tools ?? []
+                opencodeConfig.experimental = {
+                    ...opencodeConfig.experimental,
+                    primary_tools: [...existingPrimaryTools, "prune"],
+                }
+                logger.info("plugin", "Added 'prune' to experimental.primary_tools via config mutation")
+            }
+        },
         event: createEventHandler(ctx.client, janitorCtx, logger, config, toolTracker),
         "chat.params": createChatParamsHandler(ctx.client, state, logger, toolTracker),
         tool: config.strategies.onTool.length > 0 ? {

package-lock.json

@@ -47,7 +47,7 @@
     "zod": "^4.1.13"
   },
   "devDependencies": {
-    "@opencode-ai/plugin": ">=0.13.7",
+    "@opencode-ai/plugin": "^1.0.143",
     "@types/node": "^24.10.1",
     "tsx": "^4.21.0",
     "typescript": "^5.9.3"