fix: keep core tools when allowlist is plugin-only

CHANGELOG.md

@@ -6,6 +6,7 @@ Docs: https://docs.clawd.bot
 
 ### Fixes
 - Media: preserve PNG alpha when possible; fall back to JPEG when still over size cap. (#1491) Thanks @robbyczgw-cla.
+- Agents: treat plugin-only tool allowlists as opt-ins; keep core tools enabled. (#1467)
 
 ## 2026.1.22
 

docs/plugins/agent-tools.md

@@ -82,6 +82,8 @@ Enable optional tools in `agents.list[].tools.allow` (or global `tools.allow`):
 ```
 
 Other config knobs that affect tool availability:
+- Allowlists that only name plugin tools are treated as plugin opt-ins; core tools remain
+  enabled unless you also include core tools or groups in the allowlist.
 - `tools.profile` / `agents.list[].tools.profile` (base allowlist)
 - `tools.byProvider` / `agents.list[].tools.byProvider` (provider‑specific allow/deny)
 - `tools.sandbox.tools.*` (sandbox tool policy when sandboxed)

docs/tools/lobster.md

@@ -121,6 +121,10 @@ Lobster is an **optional** plugin tool (not enabled by default). Allow it per ag
 
 You can also allow it globally with `tools.allow` if every agent should see it.
 
+Note: allowlists are opt-in for optional plugins. If your allowlist only names
+plugin tools (like `lobster`), Clawdbot keeps core tools enabled. To restrict core
+tools, include the core tools or groups you want in the allowlist too.
+
 ## Example: Email triage
 
 Without Lobster:

src/agents/pi-tools.ts

@@ -44,6 +44,7 @@ import {
   collectExplicitAllowlist,
   expandPolicyWithPluginGroups,
   resolveToolProfilePolicy,
+  stripPluginOnlyAllowlist,
 } from "./tool-policy.js";
 import { getPluginToolMeta } from "../plugins/tools.js";
 
@@ -298,12 +299,30 @@ export function createClawdbotCodingTools(options?: {
     tools,
     toolMeta: (tool) => getPluginToolMeta(tool as AnyAgentTool),
   });
-  const profilePolicyExpanded = expandPolicyWithPluginGroups(profilePolicy, pluginGroups);
-  const providerProfileExpanded = expandPolicyWithPluginGroups(providerProfilePolicy, pluginGroups);
-  const globalPolicyExpanded = expandPolicyWithPluginGroups(globalPolicy, pluginGroups);
-  const globalProviderExpanded = expandPolicyWithPluginGroups(globalProviderPolicy, pluginGroups);
-  const agentPolicyExpanded = expandPolicyWithPluginGroups(agentPolicy, pluginGroups);
-  const agentProviderExpanded = expandPolicyWithPluginGroups(agentProviderPolicy, pluginGroups);
+  const profilePolicyExpanded = expandPolicyWithPluginGroups(
+    stripPluginOnlyAllowlist(profilePolicy, pluginGroups),
+    pluginGroups,
+  );
+  const providerProfileExpanded = expandPolicyWithPluginGroups(
+    stripPluginOnlyAllowlist(providerProfilePolicy, pluginGroups),
+    pluginGroups,
+  );
+  const globalPolicyExpanded = expandPolicyWithPluginGroups(
+    stripPluginOnlyAllowlist(globalPolicy, pluginGroups),
+    pluginGroups,
+  );
+  const globalProviderExpanded = expandPolicyWithPluginGroups(
+    stripPluginOnlyAllowlist(globalProviderPolicy, pluginGroups),
+    pluginGroups,
+  );
+  const agentPolicyExpanded = expandPolicyWithPluginGroups(
+    stripPluginOnlyAllowlist(agentPolicy, pluginGroups),
+    pluginGroups,
+  );
+  const agentProviderExpanded = expandPolicyWithPluginGroups(
+    stripPluginOnlyAllowlist(agentProviderPolicy, pluginGroups),
+    pluginGroups,
+  );
   const sandboxPolicyExpanded = expandPolicyWithPluginGroups(sandbox?.tools, pluginGroups);
   const subagentPolicyExpanded = expandPolicyWithPluginGroups(subagentPolicy, pluginGroups);
 

src/agents/tool-policy.plugin-only-allowlist.test.ts

@@ -0,0 +1,25 @@
+import { describe, expect, it } from "vitest";
+
+import { stripPluginOnlyAllowlist, type PluginToolGroups } from "./tool-policy.js";
+
+const pluginGroups: PluginToolGroups = {
+  all: ["lobster", "workflow_tool"],
+  byPlugin: new Map([["lobster", ["lobster", "workflow_tool"]]]),
+};
+
+describe("stripPluginOnlyAllowlist", () => {
+  it("strips allowlist when it only targets plugin tools", () => {
+    const policy = stripPluginOnlyAllowlist({ allow: ["lobster"] }, pluginGroups);
+    expect(policy?.allow).toBeUndefined();
+  });
+
+  it("strips allowlist when it only targets plugin groups", () => {
+    const policy = stripPluginOnlyAllowlist({ allow: ["group:plugins"] }, pluginGroups);
+    expect(policy?.allow).toBeUndefined();
+  });
+
+  it("keeps allowlist when it mixes plugin and core entries", () => {
+    const policy = stripPluginOnlyAllowlist({ allow: ["lobster", "read"] }, pluginGroups);
+    expect(policy?.allow).toEqual(["lobster", "read"]);
+  });
+});

src/agents/tool-policy.ts

@@ -178,6 +178,22 @@ export function expandPolicyWithPluginGroups(
   };
 }
 
+export function stripPluginOnlyAllowlist(
+  policy: ToolPolicyLike | undefined,
+  groups: PluginToolGroups,
+): ToolPolicyLike | undefined {
+  if (!policy?.allow || policy.allow.length === 0) return policy;
+  const normalized = normalizeToolList(policy.allow);
+  if (normalized.length === 0) return policy;
+  const pluginIds = new Set(groups.byPlugin.keys());
+  const pluginTools = new Set(groups.all);
+  const isPluginEntry = (entry: string) =>
+    entry === "group:plugins" || pluginIds.has(entry) || pluginTools.has(entry);
+  const isPluginOnly = normalized.every((entry) => isPluginEntry(entry));
+  if (!isPluginOnly) return policy;
+  return { ...policy, allow: undefined };
+}
+
 export function resolveToolProfilePolicy(profile?: string): ToolProfilePolicy | undefined {
   if (!profile) return undefined;
   const resolved = TOOL_PROFILES[profile as ToolProfileId];