diff --git a/README.md b/README.md
index 1d0d99e..113c8ff 100644
--- a/README.md
+++ b/README.md
@@ -13,15 +13,10 @@ Add to your OpenCode config:
 ```jsonc
 // opencode.jsonc
 {
-  "plugin": ["@tarquinen/opencode-dcp@latest"],
-  "experimental": {
-    "primary_tools": ["prune"]
-  }
+  "plugin": ["@tarquinen/opencode-dcp@latest"]
 }
 ```
 
-The `experimental.primary_tools` setting ensures the `prune` tool is only available to the primary agent (not subagents).
-
 Using `@latest` ensures you always get the newest version automatically when OpenCode starts.
 
 Restart OpenCode. The plugin will automatically start optimizing your sessions.
diff --git a/index.ts b/index.ts
index 1328d3c..0677d42 100644
--- a/index.ts
+++ b/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 ? {
diff --git a/lib/pruning-tool.ts b/lib/pruning-tool.ts
index 9c1ff13..d88baea 100644
--- a/lib/pruning-tool.ts
+++ b/lib/pruning-tool.ts
@@ -4,7 +4,7 @@ import type { PluginConfig } from "./config"
 import type { ToolTracker } from "./fetch-wrapper/tool-tracker"
 import type { ToolMetadata, PruneReason } from "./fetch-wrapper/types"
 import { resetToolTrackerCount } from "./fetch-wrapper/tool-tracker"
-import { isSubagentSession, findCurrentAgent } from "./hooks"
+import { findCurrentAgent } from "./hooks"
 import { getActualId } from "./state/id-mapping"
 import { sendUnifiedNotification, type NotificationContext } from "./ui/notification"
 import { formatPruningResultForTool } from "./ui/display-utils"
@@ -51,10 +51,6 @@ export function createPruningTool(
             const { client, state, logger, config, notificationCtx } = ctx
             const sessionId = toolCtx.sessionID
 
-            if (await isSubagentSession(client, sessionId)) {
-                return "Pruning is unavailable in subagent sessions. Do not call this tool again. Continue with your current task - if you were in the middle of work, proceed with your next step. If you had just finished, provide your final summary/findings to return to the main agent."
-            }
-
             if (!args.ids || args.ids.length === 0) {
                 return "No IDs provided. Check the <prunable-tools> list for available IDs to prune."
             }
diff --git a/package-lock.json b/package-lock.json
index 32e3914..b96f03c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -18,7 +18,7 @@
         "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"
@@ -1251,12 +1251,12 @@
       "license": "MIT"
     },
     "node_modules/@opencode-ai/plugin": {
-      "version": "1.0.128",
-      "resolved": "https://registry.npmjs.org/@opencode-ai/plugin/-/plugin-1.0.128.tgz",
-      "integrity": "sha512-M5vjz3I6KeoBSNduWmT5iHXRtTLCqICM5ocs+WrB3uxVorslcO3HVwcLzrERh/ntpxJ/1xhnHQaeG6Mg+P744A==",
+      "version": "1.0.143",
+      "resolved": "https://registry.npmjs.org/@opencode-ai/plugin/-/plugin-1.0.143.tgz",
+      "integrity": "sha512-yzaCmdazVJMDADJLbMM8KGp1X+Hd/HVyIXMlNt9qcvz/fcs/ET4EwHJsJaQi/9m/jLJ+plwBJAeIW08BMrECPg==",
       "dev": true,
       "dependencies": {
-        "@opencode-ai/sdk": "1.0.128",
+        "@opencode-ai/sdk": "1.0.143",
         "zod": "4.1.8"
       }
     },
@@ -1271,9 +1271,9 @@
       }
     },
     "node_modules/@opencode-ai/sdk": {
-      "version": "1.0.128",
-      "resolved": "https://registry.npmjs.org/@opencode-ai/sdk/-/sdk-1.0.128.tgz",
-      "integrity": "sha512-Kow3Ivg8bR8dNRp8C0LwF9e8+woIrwFgw3ZALycwCfqS/UujDkJiBeYHdr1l/07GSHP9sZPmvJ6POuvfZ923EA=="
+      "version": "1.0.143",
+      "resolved": "https://registry.npmjs.org/@opencode-ai/sdk/-/sdk-1.0.143.tgz",
+      "integrity": "sha512-dtmkBfJ7IIAHzL6KCzAlwc9GybfJONVeCsF6ePYySpkuhslDbRkZBJYb5vqGd1H5zdsgjc6JjuvmOf0rPWUL6A=="
     },
     "node_modules/@opentelemetry/api": {
       "version": "1.9.0",
diff --git a/package.json b/package.json
index c3c9bd8..43673c2 100644
--- a/package.json
+++ b/package.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"