v0.6.0-rc89

feat: Add Model Context Protocol (MCP) support to ProbeAgent (#168)

* feat: Add Model Context Protocol (MCP) support to ProbeAgent

This PR adds comprehensive MCP support to the ProbeAgent, enabling integration with
MCP-compatible tools while maintaining backward compatibility with existing XML syntax.

Core Implementation:
- Added MCP client manager in npm/src/agent/mcp/ supporting multiple transports (stdio, WebSocket, HTTP)
- Integrated MCP into ProbeAgent class with opt-in configuration (enableMcp option)
- Created XML bridge to support hybrid syntax (native tools use XML, MCP tools use JSON-in-XML)
- Migrated to Vercel AI SDK v5 with proper inputSchema format

Transport Support:
- stdio: For subprocess-based MCP servers
- WebSocket: For network-based MCP servers
- HTTP: For REST-based MCP endpoints
- Configuration format compatible with Claude's MCP setup

Testing:
- Added 62 comprehensive tests across 7 test files
- Created mock MCP server for testing without external dependencies
- Tested with real AI models (Google Gemini 2.0 Flash)
- Covered error handling, robustness, and edge cases

Examples Update:
- Simplified examples/chat/probeChat.js from 1895 to 280 lines
- Now uses ProbeAgent's MCP support instead of custom implementation
- Added integration test examples with real MCP servers

Backward Compatibility:
- MCP is disabled by default (opt-in via enableMcp: true or ENABLE_MCP=1)
- All existing functionality remains unchanged
- Native XML tools continue to work as before

Breaking Changes: None - all changes are backward compatible.

Testing: Run all MCP tests with npm test
Test with real MCP server: ENABLE_MCP=1 node test-mcp-with-ai.js

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* fix: Fix MCP integration test failures in CI

- Add mock provider support for tests when NODE_ENV=test
- Fix test timeouts in MCP error handling tests
- Fix WebSocket URL validation and error handling
- Update test expectations for MCP initialization failures
- Fix XML parsing tests for nested JSON content
- Add dotenv as dev dependency for test mocking
- Ensure all tests work without real API keys

Tests now pass in CI environments without requiring API keys.

* Fix CI failures: Update npm package dependencies and version

- Change version from 1.0.0 to 0.6.0-rc88 to match existing GitHub releases
- Update ai-sdk packages from v1 to v2 to match chat example dependencies:
  - @ai-sdk/anthropic: ^1.2.0 → ^2.0.8
  - @ai-sdk/google: ^1.2.0 → ^2.0.14
  - @ai-sdk/openai: ^1.3.0 → ^2.0.10
- Update ai package from ^4.1.60 to ^5.0.0
- Update @modelcontextprotocol/sdk from ^1.17.0 to ^1.0.0
- Update peerDependencies to match

This fixes:
1. NPM Agent Tests 404 error (version 1.0.0 release doesn't exist)
2. Test chat example ERR_MODULE_NOT_FOUND errors (dependency version mismatch)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Fix integration tests: set NODE_ENV=test for proper mock provider usage

- Update package.json test scripts to set NODE_ENV=test
- Remove duplicate MCP files and use npm package as single source of truth
- Fix hardcoded paths in test files to use relative paths
- All 25 integration tests now pass in CI environment

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Fix CI tests: use npm package imports instead of relative paths

- Update package.json to use file:../../npm for local development
- Add MCP exports to npm package.json
- Update all test files to import from @probelabs/probe packages
- Fix duplicate model initialization in ProbeAgent constructor
- All 25 integration tests now pass with proper npm package emulation

This ensures CI tests behave identically to real package usage.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Fix CI integration test failures by building npm package

The chat integration tests and NPM agent tests were failing in CI because the npm package wasn't being built before the tests attempted to import from it. This caused import failures for exports like '@probelabs/probe/agent' that require built files.

Changes:
- Added npm package build step to chat-integration-test workflow
- Added npm package build step to npm-tests workflow
- Both workflows now run `npm install && npm run build` before tests

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Fix NPM agent test failures

- Add dotenv as runtime dependency (needed by probeChat.js)
- Fix delegate tool test to use inputSchema instead of parameters
- Add cross-env for Windows compatibility in chat package

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Fix remaining NPM agent test issues

- Fix MCP SDK compatibility: use schema objects instead of strings in setRequestHandler
- Add missing getUsageSummary method to TokenCounter class
- Resolve TypeError in MockMCPServer for latest MCP SDK version

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Fix remaining test failures: tokenUsageDisplay methods and MCP XML parsing

- Add missing updateFromTokenCounter, display, and clear methods to TokenUsageDisplay
- Fix MCP XML parsing to use correct prefixed tool names (mcp_mock-mcp-server_)
- Make ProbeChat cleanup handle errors gracefully without throwing
- All integration and unit tests now pass locally

* Fix npm test failure: Skip ProbeChat tests when examples/chat deps not installed

- Check if examples/chat/node_modules exists before running tests
- Skip tests gracefully if dependencies are not installed
- This fixes the dotenv/config import error in CI where examples/chat deps aren't available
- Tests still run when dependencies are present (e.g., in integration test workflow)

* Fix actionlint executable path in CI workflow

- Explicitly set the executable output variable for actionlint step
- Fixes 'command not found' error in integration test workflow

* Fix shellcheck warning in actionlint workflow step

- Quote GITHUB_OUTPUT variable to prevent word splitting
- Fixes shellcheck SC2086 warning

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Co-authored-by: Claude <noreply@anthropic.com>