What's fixed
- Fixed GitHub Copilot context cost accounting to include prompt files, nested AGENTS.md files, and all nested .github/instructions/**/*.instructions.md files.
- Added Copilot MCP config discovery for .vscode/mcp.json and .github/mcp.json, including tools allowlists.
- Updated docs for Copilot instructions, prompts, skills, and MCP cost coverage.
Validation
- npm test
- npm run build