fix: include skills in minimal prompt (#1431) (thanks @robbyczgw-cla)

CHANGELOG.md

@@ -25,6 +25,7 @@ Docs: https://docs.clawd.bot
 - Google Antigravity: drop unsigned thinking blocks for Claude models to avoid signature errors.
 - Config: avoid stack traces for invalid configs and log the config path.
 - CLI: read Codex CLI account_id for workspace billing. (#1422) Thanks @aj47.
+- Agents: include skills section in minimal prompts for subagents. (#1431) Thanks @robbyczgw-cla.
 - Doctor: avoid recreating WhatsApp config when only legacy routing keys remain. (#900)
 - Doctor: warn when gateway.mode is unset with configure/config guidance.
 - OpenCode Zen: route models to the Zen API shape per family so proxy endpoints are used. (#1416)

src/agents/system-prompt.test.ts

@@ -23,7 +23,7 @@ describe("buildAgentSystemPrompt", () => {
     expect(prompt).not.toContain("Owner numbers:");
   });
 
-  it("omits extended sections in minimal prompt mode", () => {
+  it("keeps skills but omits other extended sections in minimal prompt mode", () => {
     const prompt = buildAgentSystemPrompt({
       workspaceDir: "/tmp/clawd",
       promptMode: "minimal",
@@ -37,7 +37,8 @@ describe("buildAgentSystemPrompt", () => {
     });
 
     expect(prompt).not.toContain("## User Identity");
-    expect(prompt).not.toContain("## Skills");
+    expect(prompt).toContain("## Skills (mandatory)");
+    expect(prompt).toContain("<available_skills>");
     expect(prompt).not.toContain("## Memory Recall");
     expect(prompt).not.toContain("## Documentation");
     expect(prompt).not.toContain("## Reply Tags");

src/agents/system-prompt.ts

@@ -7,7 +7,7 @@ import type { EmbeddedContextFile } from "./pi-embedded-helpers.js";
 /**
  * Controls which hardcoded sections are included in the system prompt.
  * - "full": All sections (default, for main agent)
- * - "minimal": Reduced sections (Tooling, Workspace, Runtime) - used for subagents
+ * - "minimal": Reduced sections (Tooling, Skills, Workspace, Runtime) - used for subagents
  * - "none": Just basic identity line, no sections
  */
 export type PromptMode = "full" | "minimal" | "none";
@@ -18,7 +18,7 @@ function buildSkillsSection(params: {
   readToolName: string;
 }) {
   const trimmed = params.skillsPrompt?.trim();
-  if (!trimmed || params.isMinimal) return [];
+  if (!trimmed) return [];
   return [
     "## Skills (mandatory)",
     "Before replying: scan <available_skills> <description> entries.",