Add support for skills

Author: mrubens

src/core/prompts/sections/index.ts

@@ -8,3 +8,4 @@ export { getToolUseGuidelinesSection } from "./tool-use-guidelines"
 export { getCapabilitiesSection } from "./capabilities"
 export { getModesSection } from "./modes"
 export { markdownFormattingSection } from "./markdown-formatting"
+export { getSkillsSection } from "./skills"

src/core/prompts/sections/skills.ts

@@ -0,0 +1,55 @@
+import { SkillsManager, SkillMetadata } from "../../../services/skills/SkillsManager"
+
+/**
+ * Generate the skills section for the system prompt.
+ * Only includes skills relevant to the current mode.
+ * Format matches the modes section style.
+ *
+ * @param skillsManager - The SkillsManager instance
+ * @param currentMode - The current mode slug (e.g., 'code', 'architect')
+ */
+export async function getSkillsSection(
+	skillsManager: SkillsManager | undefined,
+	currentMode: string | undefined,
+): Promise<string> {
+	if (!skillsManager || !currentMode) return ""
+
+	// Get skills filtered by current mode (with override resolution)
+	const skills = skillsManager.getSkillsForMode(currentMode)
+	if (skills.length === 0) return ""
+
+	// Separate generic and mode-specific skills for display
+	const genericSkills = skills.filter((s) => !s.mode)
+	const modeSpecificSkills = skills.filter((s) => s.mode === currentMode)
+
+	let skillsList = ""
+
+	if (modeSpecificSkills.length > 0) {
+		skillsList += modeSpecificSkills
+			.map((skill) => `  * "${skill.name}" skill (${currentMode} mode) - ${skill.description} [${skill.path}]`)
+			.join("\n")
+	}
+
+	if (genericSkills.length > 0) {
+		if (skillsList) skillsList += "\n"
+		skillsList += genericSkills
+			.map((skill) => `  * "${skill.name}" skill - ${skill.description} [${skill.path}]`)
+			.join("\n")
+	}
+
+	return `====
+
+AVAILABLE SKILLS
+
+Skills are pre-packaged instructions for specific tasks. When a user request matches a skill description, read the full SKILL.md file to get detailed instructions.
+
+- These are the currently available skills for "${currentMode}" mode:
+${skillsList}
+
+To use a skill:
+1. Identify which skill matches the user's request based on the description
+2. Use read_file to load the full SKILL.md file from the path shown in brackets
+3. Follow the instructions in the skill file
+4. Access any bundled files (scripts, references, assets) as needed
+`
+}

src/core/prompts/system.ts

@@ -18,6 +18,7 @@ import { isEmpty } from "../../utils/object"
 
 import { McpHub } from "../../services/mcp/McpHub"
 import { CodeIndexManager } from "../../services/code-index/manager"
+import { SkillsManager } from "../../services/skills/SkillsManager"
 
 import { PromptVariables, loadSystemPromptFile } from "./sections/custom-system-prompt"
 
@@ -34,6 +35,7 @@ import {
 	getModesSection,
 	addCustomInstructions,
 	markdownFormattingSection,
+	getSkillsSection,
 } from "./sections"
 
 // Helper function to get prompt component, filtering out empty objects
@@ -69,6 +71,7 @@ async function generatePrompt(
 	settings?: SystemPromptSettings,
 	todoList?: TodoItem[],
 	modelId?: string,
+	skillsManager?: SkillsManager,
 ): Promise<string> {
 	if (!context) {
 		throw new Error("Extension context is required for generating system prompt")
@@ -91,7 +94,7 @@ async function generatePrompt(
 	// Determine the effective protocol (defaults to 'xml')
 	const effectiveProtocol = getEffectiveProtocol(settings?.toolProtocol)
 
-	const [modesSection, mcpServersSection] = await Promise.all([
+	const [modesSection, mcpServersSection, skillsSection] = await Promise.all([
 		getModesSection(context),
 		shouldIncludeMcp
 			? getMcpServersSection(
@@ -101,6 +104,7 @@ async function generatePrompt(
 					!isNativeProtocol(effectiveProtocol),
 				)
 			: Promise.resolve(""),
+		getSkillsSection(skillsManager, mode as string),
 	])
 
 	// Build tools catalog section only for XML protocol
@@ -148,6 +152,8 @@ ${getCapabilitiesSection(cwd, shouldIncludeMcp ? mcpHub : undefined)}
 
 ${modesSection}
 
+${skillsSection}
+
 ${getRulesSection(cwd, settings)}
 
 ${getSystemInfoSection(cwd)}
@@ -183,6 +189,7 @@ export const SYSTEM_PROMPT = async (
 	settings?: SystemPromptSettings,
 	todoList?: TodoItem[],
 	modelId?: string,
+	skillsManager?: SkillsManager,
 ): Promise<string> => {
 	if (!context) {
 		throw new Error("Extension context is required for generating system prompt")
@@ -255,5 +262,6 @@ ${customInstructions}`
 		settings,
 		todoList,
 		modelId,
+		skillsManager,
 	)
 }

src/core/task/Task.ts

@@ -3538,6 +3538,7 @@ export class Task extends EventEmitter<TaskEvents> implements TaskLike {
 				},
 				undefined, // todoList
 				this.api.getModel().id,
+				provider.getSkillsManager(),
 			)
 		})()
 	}

src/core/webview/ClineProvider.ts

@@ -71,6 +71,7 @@ import { ShadowCheckpointService } from "../../services/checkpoints/ShadowCheckp
 import { CodeIndexManager } from "../../services/code-index/manager"
 import type { IndexProgressUpdate } from "../../services/code-index/interfaces/manager"
 import { MdmService } from "../../services/mdm/MdmService"
+import { SkillsManager } from "../../services/skills/SkillsManager"
 
 import { fileExistsAtPath } from "../../utils/fs"
 import { setTtsEnabled, setTtsSpeed } from "../../utils/tts"
@@ -137,6 +138,7 @@ export class ClineProvider
 	private codeIndexManager?: CodeIndexManager
 	private _workspaceTracker?: WorkspaceTracker // workSpaceTracker read-only for access outside this class
 	protected mcpHub?: McpHub // Change from private to protected
+	protected skillsManager?: SkillsManager
 	private marketplaceManager: MarketplaceManager
 	private mdmService?: MdmService
 	private taskCreationCallback: (task: Task) => void
@@ -197,6 +199,12 @@ export class ClineProvider
 				this.log(`Failed to initialize MCP Hub: ${error}`)
 			})
 
+		// Initialize Skills Manager for skill discovery
+		this.skillsManager = new SkillsManager(this)
+		this.skillsManager.initialize().catch((error) => {
+			this.log(`Failed to initialize Skills Manager: ${error}`)
+		})
+
 		this.marketplaceManager = new MarketplaceManager(this.context, this.customModesManager)
 
 		// Forward <most> task events to the provider.
@@ -603,6 +611,8 @@ export class ClineProvider
 		this._workspaceTracker = undefined
 		await this.mcpHub?.unregisterClient()
 		this.mcpHub = undefined
+		await this.skillsManager?.dispose()
+		this.skillsManager = undefined
 		this.marketplaceManager?.cleanup()
 		this.customModesManager?.dispose()
 		this.log("Disposed all disposables")
@@ -2443,6 +2453,10 @@ export class ClineProvider
 		return this.mcpHub
 	}
 
+	public getSkillsManager(): SkillsManager | undefined {
+		return this.skillsManager
+	}
+
 	/**
 	 * Check if the current state is compliant with MDM policy
 	 * @returns true if compliant or no MDM policy exists, false if MDM policy exists and user is non-compliant

src/core/webview/generateSystemPrompt.ts

@@ -99,6 +99,9 @@ export const generateSystemPrompt = async (provider: ClineProvider, message: Web
 			toolProtocol,
 			isStealthModel: modelInfo?.isStealthModel,
 		},
+		undefined, // todoList
+		undefined, // modelId
+		provider.getSkillsManager(),
 	)
 
 	return systemPrompt