fix(skill-mcp): pass workspace directory as cwd to stdio MCP processes

In OpenCode web multi-workspace mode, skill_mcp spawned stdio child
processes inherited process.cwd() instead of the session's workspace
directory. Pass toolContext.directory through SkillMcpClientInfo to
StdioClientTransport's cwd parameter.

src/features/skill-mcp-manager/stdio-client.ts

@@ -60,6 +60,7 @@ export async function createStdioClient(params: SkillMcpClientConnectionParams):
     args,
     env: mergedEnv,
     stderr: "ignore",
+    ...(info.directory ? { cwd: info.directory } : {}),
   })
 
   const client: McpClient = stdioClientDependencies.createClient(

src/features/skill-mcp-manager/types.ts

@@ -24,6 +24,7 @@ export interface SkillMcpClientInfo {
   skillName: string
   sessionID: string
   scope?: SkillScope | "local"
+  directory?: string
 }
 
 export interface SkillMcpServerContext {

src/tools/skill-mcp/tools.test.ts

@@ -192,6 +192,32 @@ describe("skill_mcp tool", () => {
         {},
       )
     })
+
+    it("passes toolContext.directory to the manager", async () => {
+      // given
+      loadedSkills = [
+        createMockSkillWithMcp("test-skill", {
+          "test-server": { command: "echo", args: ["test"] },
+        }),
+      ]
+      const callToolSpy = spyOn(manager, "callTool").mockResolvedValue({ content: [] } as never)
+      const tool = createSkillMcpTool({
+        manager,
+        getLoadedSkills: () => loadedSkills,
+        getSessionID: () => "session-1",
+      })
+
+      // when
+      await tool.execute({ mcp_name: "test-server", tool_name: "some-tool" }, mockContext)
+
+      // then
+      expect(callToolSpy).toHaveBeenCalledWith(
+        expect.objectContaining({ directory: "/test" }),
+        expect.any(Object),
+        "some-tool",
+        {},
+      )
+    })
   })
 })
 

src/tools/skill-mcp/tools.ts

@@ -167,6 +167,7 @@ export function createSkillMcpTool(options: SkillMcpToolOptions): ToolDefinition
         skillName: found.skill.name,
         sessionID,
         scope: found.skill.scope,
+        directory: toolContext.directory,
       }
 
       const context: SkillMcpServerContext = {