SDK: add sessionless commands.list API to retrieve built-in slash commands

java/src/generated/java/com/github/copilot/generated/rpc/CommandsListResult.java

@@ -0,0 +1,31 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *--------------------------------------------------------------------------------------------*/
+
+// AUTO-GENERATED FILE - DO NOT EDIT
+// Generated from: api.schema.json
+
+package com.github.copilot.generated.rpc;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.github.copilot.CopilotExperimental;
+import java.util.List;
+import javax.annotation.processing.Generated;
+
+/**
+ * Slash commands available in the session, after applying any include/exclude filters.
+ *
+ * @apiNote This method is experimental and may change in a future version.
+ * @since 1.0.0
+ */
+@CopilotExperimental
+@javax.annotation.processing.Generated("copilot-sdk-codegen")
+@JsonInclude(JsonInclude.Include.NON_NULL)
+@JsonIgnoreProperties(ignoreUnknown = true)
+public record CommandsListResult(
+    /** Commands available in this session */
+    @JsonProperty("commands") List<SlashCommandInfo> commands
+) {
+}

java/src/generated/java/com/github/copilot/generated/rpc/ServerCommandsApi.java

@@ -0,0 +1,40 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *--------------------------------------------------------------------------------------------*/
+
+// AUTO-GENERATED FILE - DO NOT EDIT
+// Generated from: api.schema.json
+
+package com.github.copilot.generated.rpc;
+
+import com.github.copilot.CopilotExperimental;
+import java.util.concurrent.CompletableFuture;
+import javax.annotation.processing.Generated;
+
+/**
+ * API methods for the {@code commands} namespace.
+ *
+ * @since 1.0.0
+ */
+@javax.annotation.processing.Generated("copilot-sdk-codegen")
+public final class ServerCommandsApi {
+
+    private final RpcCaller caller;
+
+    /** @param caller the RPC transport function */
+    ServerCommandsApi(RpcCaller caller) {
+        this.caller = caller;
+    }
+
+    /**
+     * Slash commands available in the session, after applying any include/exclude filters.
+     *
+     * @apiNote This method is experimental and may change in a future version.
+     * @since 1.0.0
+     */
+    @CopilotExperimental
+    public CompletableFuture<CommandsListResult> list() {
+        return caller.invoke("commands.list", java.util.Map.of(), CommandsListResult.class);
+    }
+
+}

java/src/generated/java/com/github/copilot/generated/rpc/ServerRpc.java

@@ -43,6 +43,8 @@ public final class ServerRpc {
     public final ServerAgentsApi agents;
     /** API methods for the {@code instructions} namespace. */
     public final ServerInstructionsApi instructions;
+    /** API methods for the {@code commands} namespace. */
+    public final ServerCommandsApi commands;
     /** API methods for the {@code user} namespace. */
     public final ServerUserApi user;
     /** API methods for the {@code runtime} namespace. */
@@ -72,6 +74,7 @@ public ServerRpc(RpcCaller caller) {
         this.skills = new ServerSkillsApi(caller);
         this.agents = new ServerAgentsApi(caller);
         this.instructions = new ServerInstructionsApi(caller);
+        this.commands = new ServerCommandsApi(caller);
         this.user = new ServerUserApi(caller);
         this.runtime = new ServerRuntimeApi(caller);
         this.sessionFs = new ServerSessionFsApi(caller);

nodejs/test/e2e/rpc_server.e2e.test.ts

@@ -187,6 +187,26 @@ describe("Server-scoped RPC", async () => {
         }
     });
 
+    it("should call rpc commands list with well-known session-start commands", async () => {
+        await client.start();
+        const result = await client.rpc.commands.list();
+        expect(result.commands).toBeDefined();
+        expect(result.commands.length).toBeGreaterThan(0);
+
+        const names = result.commands.map((command) => command.name);
+        // Well-known commands that work as the first message in a new session.
+        expect(names).toContain("plan");
+        expect(names).toContain("env");
+        // Commands that require an active session must not be listed.
+        expect(names).not.toContain("compact");
+        expect(names).not.toContain("usage");
+
+        for (const command of result.commands) {
+            expect(command.name).toBeTruthy();
+            expect(command.kind).toBe("builtin");
+        }
+    });
+
     it("should call rpc sessionFs setProvider with typed result", async () => {
         const fsClient = createClientWithEnv({});
         await fsClient.start();

rust/src/generated/api_types.rs

@@ -92,6 +92,8 @@ pub mod rpc_methods {
     pub const INSTRUCTIONS_DISCOVER: &str = "instructions.discover";
     /// `instructions.getDiscoveryPaths`
     pub const INSTRUCTIONS_GETDISCOVERYPATHS: &str = "instructions.getDiscoveryPaths";
+    /// `commands.list`
+    pub const COMMANDS_LIST: &str = "commands.list";
     /// `user.settings.reload`
     pub const USER_SETTINGS_RELOAD: &str = "user.settings.reload";
     /// `user.settings.get`
@@ -15476,6 +15478,21 @@ pub struct InstructionsGetDiscoveryPathsResult {
     pub paths: Vec<InstructionDiscoveryPath>,
 }
 
+/// Slash commands available in the session, after applying any include/exclude filters.
+///
+/// <div class="warning">
+///
+/// **Experimental.** This type is part of an experimental wire-protocol surface
+/// and may change or be removed in future SDK or CLI releases.
+///
+/// </div>
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CommandsListResult {
+    /// Commands available in this session
+    pub commands: Vec<SlashCommandInfo>,
+}
+
 /// Result of opening a session.
 ///
 /// <div class="warning">

rust/src/generated/rpc.rs

@@ -43,6 +43,13 @@ impl<'a> ClientRpc<'a> {
         }
     }
 
+    /// `commands.*` sub-namespace.
+    pub fn commands(&self) -> ClientRpcCommands<'a> {
+        ClientRpcCommands {
+            client: self.client,
+        }
+    }
+
     /// `instructions.*` sub-namespace.
     pub fn instructions(&self) -> ClientRpcInstructions<'a> {
         ClientRpcInstructions {
@@ -457,6 +464,38 @@ impl<'a> ClientRpcAgents<'a> {
     }
 }
 
+/// `commands.*` RPCs.
+#[derive(Clone, Copy)]
+pub struct ClientRpcCommands<'a> {
+    pub(crate) client: &'a Client,
+}
+
+impl<'a> ClientRpcCommands<'a> {
+    /// Lists the well-known built-in slash commands that work as the first message in a new session (e.g. /plan, /env), without requiring an active session. Commands that depend on session state, authentication, or a synced session are omitted.
+    ///
+    /// Wire method: `commands.list`.
+    ///
+    /// # Returns
+    ///
+    /// Slash commands available in the session, after applying any include/exclude filters.
+    ///
+    /// <div class="warning">
+    ///
+    /// **Experimental.** This API is part of an experimental wire-protocol surface
+    /// and may change or be removed in future SDK or CLI releases. Pin both the
+    /// SDK and CLI versions if your code depends on it.
+    ///
+    /// </div>
+    pub async fn list(&self) -> Result<CommandList, Error> {
+        let wire_params = serde_json::json!({});
+        let _value = self
+            .client
+            .call(rpc_methods::COMMANDS_LIST, Some(wire_params))
+            .await?;
+        Ok(serde_json::from_value(_value)?)
+    }
+}
+
 /// `instructions.*` RPCs.
 #[derive(Clone, Copy)]
 pub struct ClientRpcInstructions<'a> {