feat: ecosystem integration — Cursor, Windsurf, Copilot + MCP Registry

[OneStepAt4time]

M4 — Ecosystem Integration

Parent: #440 (Roadmap)
Milestone: M4 — Ecosystem Integration
Depends on: M1 complete

Tasks

M4.1 — Cursor integration

• Test Aegis MCP server works in Cursor
• Document setup in docs/integrations/cursor.md
• Verify all tools work correctly

M4.2 — Windsurf / Copilot / other MCP hosts

• Test with Windsurf, GitHub Copilot (when MCP support lands)
• Document each integration

M4.3 — MCP Registry

• Register Aegis on GitHub MCP Registry (https://github.com/mcp)
• Add proper metadata for auto-discovery
• Badge in README

Acceptance criteria

• Aegis works in at least 2 non-CC MCP hosts
• Each integration has dedicated documentation
• MCP Registry listing live and discoverable

[OneStepAt4time]

Closing as completed by merged PR #1068, which added the ecosystem integration guides for Cursor, Windsurf, and MCP registry usage.