feat: add README for Cursor IDE slash commands integration

Author: tikazyq

specs/140-cursor-slash-commands/README.md

@@ -0,0 +1,85 @@
+---
+status: planned
+created: '2025-12-04'
+tags:
+  - cursor
+  - slash-commands
+  - ai
+  - ux
+  - ide-integration
+priority: medium
+created_at: '2025-12-04T07:23:15.903Z'
+depends_on:
+  - 034-copilot-slash-commands
+updated_at: '2025-12-04T07:23:15.981Z'
+---
+
+# Cursor IDE Slash Commands Integration
+
+> **Status**: 🗓️ Planned · **Priority**: Medium · **Created**: 2025-12-04 · **Tags**: cursor, slash-commands, ai, ux, ide-integration
+
+## Overview
+
+**User Feedback**: "leanspec 是不支持 cursor slash commands 吗，听说 openspec 支持" (User asks if LeanSpec supports Cursor slash commands, noting that OpenSpec supports it)
+
+Add LeanSpec integration directly into Cursor IDE via slash commands, enabling developers to interact with specs naturally through Cursor's AI chat without leaving their coding context.
+
+**Why this matters**: Cursor is one of the most popular AI-native IDEs. Users expect native slash command integrations for their development tools.
+
+## Design
+
+**Cursor Slash Commands** use a `.cursorrules` or `.cursor/rules` file and custom slash command definitions.
+
+**Implementation Options:**
+
+**Option A: Cursor Rules File** (Simplest)
+- Create `.cursorrules` template with LeanSpec context
+- Include spec discovery, creation, and management prompts
+- Users copy template to their projects
+
+**Option B: Custom Slash Commands** 
+- Implement via Cursor's custom slash command API (if available)
+- Register commands like `/lspec-search`, `/lspec-create`, `/lspec-board`
+
+**Option C: MCP Integration** (Recommended)
+- Cursor supports MCP servers natively
+- LeanSpec already has MCP server (`@leanspec/mcp`)
+- Users just need to configure MCP in Cursor settings
+
+**Proposed Commands:**
+- `/lspec-board` - Show Kanban board of specs
+- `/lspec-search <query>` - Search specs
+- `/lspec-create <name>` - Create new spec
+- `/lspec-view <spec>` - View spec content
+- `/lspec-update <spec> --status <status>` - Update spec status
+
+## Plan
+
+- [ ] Research Cursor's current slash command / extension API
+- [ ] Document MCP server setup for Cursor (may already work!)
+- [ ] Create `.cursorrules` template for LeanSpec workflows
+- [ ] Test MCP integration in Cursor IDE
+- [ ] Add Cursor setup guide to documentation
+- [ ] Compare with OpenSpec's Cursor integration approach
+
+## Test
+
+- [ ] MCP server connects successfully in Cursor
+- [ ] Slash commands return expected results
+- [ ] Spec creation/update works through Cursor chat
+- [ ] Documentation is clear and complete
+
+## Notes
+
+**Competitive Context:**
+- OpenSpec reportedly supports Cursor slash commands
+- Need to research their implementation approach
+
+**Related:**
+- Spec 034: GitHub Copilot Chat slash commands (similar concept, different IDE)
+- LeanSpec MCP server already exists - may just need configuration docs
+
+**Open Questions:**
+- Does Cursor support custom slash commands natively, or only via MCP?
+- What's the exact implementation OpenSpec uses?
+- Can we provide a one-click setup experience?