feat: add /context command to CLI built-ins list

src/lib/commands/slashCommands.test.ts

@@ -94,10 +94,11 @@ describe("slashCommands", () => {
       expect(commandNames).toContain("loop");
       expect(commandNames).toContain("batch");
       expect(commandNames).toContain("memory");
+      expect(commandNames).toContain("context");
     });
 
-    it("has 11 commands total", () => {
+    it("has 12 commands total", () => {
-      expect(slashCommands.length).toBe(11);
+      expect(slashCommands.length).toBe(12);
     });
 
     it("each command has required properties", () => {
@@ -189,6 +190,13 @@ describe("slashCommands", () => {
       expect(batchCmd!.usage).toBe("/batch [tasks]");
     });
 
+    it("context command has correct metadata and source", () => {
+      const contextCmd = slashCommands.find((cmd) => cmd.name === "context");
+      expect(contextCmd).toBeDefined();
+      expect(contextCmd!.source).toBe("cli");
+      expect(contextCmd!.usage).toBe("/context");
+    });
+
     it("app commands do not have source set", () => {
       const appCommandNames = ["cd", "clear", "new", "help", "search", "summarise", "skill"];
       appCommandNames.forEach((name) => {
@@ -199,7 +207,7 @@ describe("slashCommands", () => {
     });
 
     it("cli commands have source set to 'cli'", () => {
-      const cliCommandNames = ["simplify", "loop", "batch"];
+      const cliCommandNames = ["simplify", "loop", "batch", "memory", "context"];
       cliCommandNames.forEach((name) => {
         const cmd = slashCommands.find((c) => c.name === name);
         expect(cmd).toBeDefined();
@@ -869,6 +877,26 @@ describe("slashCommands", () => {
       });
     });
 
+    describe("/context execute", () => {
+      it("shows error when no active conversation", async () => {
+        getMock.mockReturnValue(null);
+        const contextCmd = slashCommands.find((cmd) => cmd.name === "context")!;
+        await contextCmd.execute("");
+        expect(claudeStore.addLine).toHaveBeenCalledWith("error", "No active conversation");
+      });
+
+      it("sends /context prompt to Claude when there is an active conversation", async () => {
+        getMock.mockReturnValue("conv-123");
+        invokeMock.mockResolvedValue(undefined);
+        const contextCmd = slashCommands.find((cmd) => cmd.name === "context")!;
+        await contextCmd.execute("");
+        expect(invokeMock).toHaveBeenCalledWith("send_prompt", {
+          conversationId: "conv-123",
+          message: "/context",
+        });
+      });
+    });
+
     describe("/cd success path", () => {
       beforeEach(() => {
         vi.useFakeTimers();

src/lib/commands/slashCommands.ts

@@ -297,6 +297,21 @@ export const slashCommands: SlashCommand[] = [
       await invoke("send_prompt", { conversationId, message: "/memory" });
     },
   },
+  {
+    name: "context",
+    description:
+      "Show current context window usage with optimisation suggestions (Claude Code built-in)",
+    usage: "/context",
+    source: "cli",
+    execute: async () => {
+      const conversationId = get(claudeStore.activeConversationId);
+      if (!conversationId) {
+        claudeStore.addLine("error", "No active conversation");
+        return;
+      }
+      await invoke("send_prompt", { conversationId, message: "/context" });
+    },
+  },
   {
     name: "skill",
     description: "Invoke a Claude Code skill from ~/.claude/skills/",