diff --git a/extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/test/copilotCLICustomizationProvider.spec.ts b/extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/test/copilotCLICustomizationProvider.spec.ts
index e2407ec251874..500e4b1ad3a63 100644
--- a/extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/test/copilotCLICustomizationProvider.spec.ts
+++ b/extensions/copilot/src/extension/chatSessions/copilotcli/vscode-node/test/copilotCLICustomizationProvider.spec.ts
@@ -60,7 +60,7 @@ function makeInstruction(uri: URI, name: string, pattern: string | undefined, de
 
 /** Creates a ChatSkill stub, deriving the name from the parent directory for SKILL.md files. */
 function makeSkill(uri: URI, name: string): vscode.ChatSkill {
-	return { uri, name: name, source: 'local' };
+	return { uri, name: name, source: 'local', disableModelInvocation: false };
 }
 
 /** Creates a ChatHook stub. */
diff --git a/extensions/copilot/src/extension/chatSessions/vscode-node/test/claudeCustomizationProvider.spec.ts b/extensions/copilot/src/extension/chatSessions/vscode-node/test/claudeCustomizationProvider.spec.ts
index 2e2f20e4e1255..3c226eeffd1da 100644
--- a/extensions/copilot/src/extension/chatSessions/vscode-node/test/claudeCustomizationProvider.spec.ts
+++ b/extensions/copilot/src/extension/chatSessions/vscode-node/test/claudeCustomizationProvider.spec.ts
@@ -23,7 +23,7 @@ function mockAgent(uri: URI, name: string): vscode.ChatCustomAgent {
 }
 
 function mockSkill(uri: URI, name: string): vscode.ChatSkill {
-	return { uri, name, source: 'local' } satisfies vscode.ChatSkill;
+	return { uri, name, source: 'local', disableModelInvocation: false } satisfies vscode.ChatSkill;
 }
 
 class FakeChatSessionCustomizationType {
diff --git a/src/vs/workbench/api/browser/mainThreadChatAgents2.ts b/src/vs/workbench/api/browser/mainThreadChatAgents2.ts
index 166bd01cc10ec..3041af76d2038 100644
--- a/src/vs/workbench/api/browser/mainThreadChatAgents2.ts
+++ b/src/vs/workbench/api/browser/mainThreadChatAgents2.ts
@@ -251,6 +251,7 @@ export class MainThreadChatAgents2 extends Disposable implements MainThreadChatA
 			pluginUri: skill.pluginUri,
 			sessionTypes: skill.sessionTypes,
 			userInvocable: skill.userInvocable,
+			disableModelInvocation: skill.disableModelInvocation,
 		};
 	}
 
diff --git a/src/vs/workbench/api/common/extHost.protocol.ts b/src/vs/workbench/api/common/extHost.protocol.ts
index 8282d175cde94..2d06f5a08e22b 100644
--- a/src/vs/workbench/api/common/extHost.protocol.ts
+++ b/src/vs/workbench/api/common/extHost.protocol.ts
@@ -1713,6 +1713,7 @@ export interface IInstructionDto extends IChatResourceDto {
 
 export interface ISkillDto extends IChatResourceDto {
 	readonly userInvocable: boolean;
+	readonly disableModelInvocation: boolean;
 }
 
 export interface ISlashCommandDto extends IChatResourceDto {
diff --git a/src/vs/workbench/api/common/extHostChatAgents2.ts b/src/vs/workbench/api/common/extHostChatAgents2.ts
index 1d9d9341a7caf..d22c8ca432727 100644
--- a/src/vs/workbench/api/common/extHostChatAgents2.ts
+++ b/src/vs/workbench/api/common/extHostChatAgents2.ts
@@ -572,6 +572,7 @@ export class ExtHostChatAgents2 extends Disposable implements ExtHostChatAgentsS
 			pluginUri: dto.pluginUri ? URI.revive(dto.pluginUri) : undefined,
 			sessionTypes: dto.sessionTypes,
 			userInvocable: dto.userInvocable,
+			disableModelInvocation: dto.disableModelInvocation,
 		});
 	}
 
diff --git a/src/vscode-dts/vscode.proposed.chatPromptFiles.d.ts b/src/vscode-dts/vscode.proposed.chatPromptFiles.d.ts
index 8ba23e42d8f61..30b8777d22a6b 100644
--- a/src/vscode-dts/vscode.proposed.chatPromptFiles.d.ts
+++ b/src/vscode-dts/vscode.proposed.chatPromptFiles.d.ts
@@ -192,6 +192,12 @@ declare module 'vscode' {
 		 * Whether this skill should be shown to users as invocable.
 		 */
 		readonly userInvocable?: boolean;
+
+		/**
+		 * Whether this skill should be excluded from model invocation.
+		 * When true, the skill can only be triggered manually via `/name`.
+		 */
+		readonly disableModelInvocation: boolean;
 	}
 
 	/**