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core/client: add MCP client with sessions, server requests, and docs #133

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42f14e8
core: implement MCP client with session and bidirectional support
laulauland Oct 14, 2025
5273bfb
fix: update client code to use new protocol version constants
laulauland Oct 14, 2025
79eb3b6
docs: add comprehensive MCP client documentation
laulauland Oct 16, 2025
ad6f5b5
add a pass at oauth API for client
laulauland Oct 24, 2025
fe80aa4
refactor: simplify client SSE stream - return void instead of tee
laulauland Oct 27, 2025
fe2f910
fix: add delay before fetch in SSE test to ensure stream is ready
laulauland Oct 27, 2025
9ac7dcc
fix: use timeout-based event collection instead of count
laulauland Oct 27, 2025
c029905
feat: add custom headers support to StreamableHttpClientTransport
laulauland Oct 27, 2025
a41b0f4
refactor: move custom headers to connect() time instead of transport …
laulauland Oct 27, 2025
72b92c3
docs: document custom headers feature in client README
laulauland Oct 27, 2025
0661184
fix: use origin for OAuth discovery per RFC 8707
laulauland Oct 28, 2025
56f333e
feat: add Dynamic Client Registration (RFC 7591) support
laulauland Oct 28, 2025
f148c56
docs: document Dynamic Client Registration and RFC 8707 compliance in…
laulauland Oct 28, 2025
89329ab
fix the deps
laulauland Oct 28, 2025
992ae6c
fix: export DCR types and functions from main index
laulauland Oct 28, 2025
37b8c04
fix: use correct MCP protocol version in OAuth discovery fallback
laulauland Oct 29, 2025
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17 changes: 17 additions & 0 deletions .changeset/mcp-client-implementation.md
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"mcp-lite": minor
---

Add MCP client implementation with session management and bidirectional communication support.

The client provides:
- McpClient class for connecting to MCP servers
- Connection interface for calling tools, prompts, and resources
- ClientSessionAdapter for optional session persistence
- StreamableHttpClientTransport for HTTP/SSE communication
- Handler registration for server-initiated requests (sampling, elicitation)
- Middleware support for request interception
- ToolAdapter interface for SDK integration
- Full TypeScript support with zero runtime dependencies

Includes 29 integration tests validating stateless operations, session management, server-initiated requests, and end-to-end workflows.
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