CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

11.0.0 - 2026-01-19

Added

• (conductor) infer response tracing direction from context
• (sacp) add Response variant to MessageCx

Fixed

• (sacp) revert accidental JrMessageHandler and JrRequestCx renames
• (conductor) normalize acp_url field in trace snapshot tests
• (conductor) handle Response variants in message forwarding
• (conductor) panic on Response in forwarding functions

Other

• go back from connect_from to builder
• fix unresolved rustdoc link warnings for v11 API
• (sacp) [breaking] rename HandleMessageFrom to HandleDispatchFrom
• (sacp) [breaking] rename *_cx variables to descriptive names
• (sacp) [breaking] rename MessageCx to Dispatch for clearer semantics
• (sacp) [breaking] rename Serve to ConnectTo for clearer semantics
• (sacp) [breaking] replace JrLink/JrPeer with unified Role-based API
• (sacp) rename JrMessageHandler to HandleMessageFrom
• (sacp) rename JrConnectionBuilder to ConnectFrom
• (sacp) simplify spawn_connection API
• (sacp) rename context types for clarity
• (sacp) rename JrResponder ecosystem to Run
• (sacp) rename Jr* traits to JsonRpc* for clarity
• get tracing working
• refactor tracing
• (conductor) simplify trace bridge API
• (conductor) move tracing to transport layer with bridge wrappers
• remove into_connection_builder
• add a test that shows a request going all the way back to the client
• (sacp-conductor) add trace snapshot for client-hosted MCP server
• (sacp-conductor) add trace snapshot test for agent-initiated MCP tool calls
• wip
• (sacp) introduce JrResponseCx for incoming response handling

10.0.1 - 2025-12-31

Other

• Merge pull request #109 from nikomatsakis/ci-binaries
• add binary releases for CLI tools

10.0.0-alpha.4 - 2025-12-30

Added

• (deps) [breaking] upgrade agent-client-protocol-schema to 0.10.5

10.0.0-alpha.3 - 2025-12-29

Added

• (sacp) add tool enable/disable filtering for MCP servers

Other

• (sacp-conductor) add standalone MCP server tests
• [breaking] make McpServer implement component

10.0.0-alpha.2 - 2025-12-29

Other

• updated the following local packages: sacp, sacp-tokio

10.0.0-alpha.1 - 2025-12-28

Added

• (sacp) add tool_fn for concurrent stateless tools

Fixed

• (sacp) use unstructured output for non-object MCP tool results
• (sacp-conductor) route proxied responses through conductor message loop
• (sacp-conductor) use Agent endpoint for proxy mode successor forwarding

Other

• [breaking] split peer.rs into separate peer and link modules
• [breaking] update module and documentation references from role to peer
• [breaking] rename FooRole types to FooPeer
• [breaking] rename link endpoint types from Foo to FooRole
• [breaking] give component a link
• refactor!(conductor): replace ComponentList with typed instantiator traits
• [breaking] split Conductor into agent vs proxy mode with ConductorLink trait
• use self.conductor_tx
• [breaking] rename End type param to Peer, endpoint vars to peer
• update UntypedRole to UntypedRole in doc examples
• [breaking] rename Endpoint to Role
• (sacp) rename JrRole to JrLink, Role type param to Link
• [breaking] rename JrRole to JrLink (and the Role associated type to Link)
• (sacp-conductor) use explicit endpoints for ConductorToClient
• (sacp) add block_task() builder pattern for SessionBuilder
• (sacp) rename with_client to run_until
• update references for renamed methods

9.0.0 - 2025-12-19

Added

• (sacp) [breaking] require Send for JrMessageHandler with boxing witness macros
• (sacp) [breaking] use AsyncFnMut for tool closures with macro workaround
• (sacp) [breaking] merge pending_tasks into JrResponder and remove 'scope lifetime
• (sacp) [breaking] add scoped lifetime support for MCP servers
• (sacp) [breaking] add scoped lifetime to JrConnectionBuilder and JrConnection

Fixed

• (sacp-conductor) use pre-built binaries in all integration tests
• (sacp-conductor) use pre-built binaries in trace_generation test

Other

• (sacp) simplify return types with impl Trait
• (sacp-conductor) formatting and accept impl ToString for name
• Merge pull request #88 from nikomatsakis/main
• (sacp) [breaking] remove to_future_hack from tool_fn API

8.0.0 - 2025-12-17

Fixed

• (sacp) ensure NewSessionRequest flows through handler chain

Other

• (sacp) add tool_fn!() macro for MCP tool registration

7.0.0 - 2025-12-17

Other

• update examples and tests to use new MCP server API
• update MCP server documentation for new API
• rename handler chain terminology to connection builder

5.0.1 - 2025-12-15

Other

• (sacp) rename MatchMessage to MatchMessageFrom
• new session redirection support

5.0.0 - 2025-12-12

Added

• [breaking] introduce role-based connection API

Other

• release

4.0.0 - 2025-12-12

Added

• [breaking] introduce role-based connection API

3.0.0 - 2025-11-25

Added

• (elizacp) add HTTP MCP server support and update tests to use HTTP bridge
• (conductor) change default MCP bridge mode to HTTP

Fixed

• (conductor) return 202 Accepted for MCP notifications per HTTP spec
• (conductor) correct typo in actor parameter name
• (conductor) update tests to use McpBridgeMode instead of Option<Vec>

Other

• (conductor) simplify HTTP MCP bridge with typed HttpMessage enum
• (conductor) update outdated comments in MCP bridge modules
• move HTTP and implement shared code
• move stdio into the stdio arm
• (conductor) introduce McpBridgeMode enum to support multiple bridge types
• adopt newer convention
• (conductor) extract MCP bridge actor into trait with stdio submodule
• implementing HTTP MCP bridge
• impenetrable error

2.1.1 - 2025-11-23

Other

• (elizacp) export ElizaAgent as public Component

2.1.0 - 2025-11-22

Added

• (sacp-conductor) write tracing logs to debug file when --debug is enabled
• (sacp-conductor) add --log option for setting log level
• (sacp-conductor) strip ANSI escape codes from stderr in debug logs
• (sacp-conductor) add debug logging with --debug and --debug-dir flags
• (elizacp) add MCP tools/list support and refactor client handling

Fixed

• (sacp-conductor) empty conductor now responds with proxy capability
• (sacp-conductor) handle empty components in proxy mode

Other

• (sacp-conductor) avoid creating debug logger twice
• (sacp-conductor) simplify logging to only use command-line args
• (sacp-conductor) move main logic into library

2.0.1 - 2025-11-18

Other

• (yopo) accept impl ToString for prompt parameter
• replace yolo_prompt with direct yopo::prompt calls
• upgrade to sacp-proxy 2.0.0 and migrate tests to McpServer API

2.0.0 - 2025-11-17

Added

• (sacp-proxy) add meta fields to all request/notification types
• (conductor) add session-aware MCP bridge with connection correlation

Fixed

• (elizacp) update tool name regex to match MCP spec
• (test) suppress dead code warnings from mcp_integration module

Other

• Merge pull request #47 from nikomatsakis/main
• (test) remove broken test_mcp_bridge_with_session_id
• (test) use block_task() instead of custom recv helper
• (sacp-conductor) verify MCP tools receive correct session_id
• add test helpers and elizacp component wrapper

1.0.1 - 2025-11-15

Other

• updated the following local packages: sacp-proxy

1.0.0 - 2025-11-13

Other

• (sacp-proxy) [breaking] move rmcp integration to separate sacp-rmcp crate

1.0.0-alpha.9 - 2025-11-12

Other

• Merge pull request #30 from nikomatsakis/main
• (sacp) remove Deref impl from JrRequestCx
• (sacp) add Component::serve() and simplify channel API

1.0.0-alpha.8 - 2025-11-12

Other

• Merge pull request #28 from nikomatsakis/main

1.0.0-alpha.7 - 2025-11-11

Other

• Merge pull request #26 from nikomatsakis/main
• [breaking] make Component trait ergonomic with async fn and introduce DynComponent
• [breaking] make Component the primary trait with Transport as blanket impl

1.0.0-alpha.6 - 2025-11-11

Added

• (sacp-conductor) implement Component trait for Conductor
• (sacp-conductor) add SYMPOSIUM_LOG environment variable for file logging

Other

• Merge pull request #24 from nikomatsakis/main

1.0.0-alpha.5 - 2025-11-11

Other

• convert Stdio to unit struct for easier reference

1.0.0-alpha.4 - 2025-11-11

Other

• cleanup and simplify some of the logic to avoid "indirection" through
• remove ComponentProvider trait
• unify Transport and Component traits with BoxFuture-returning signatures
• create selective jsonrpcmsg re-export module
• replace jsonrpcmsg::Message with sacp::JsonRpcMessage throughout codebase
• move Component trait to sacp-proxy crate
• (sacp) improve IntoJrTransport and Component trait impls
• (sacp-conductor) make Component trait mirror IntoJrTransport interface
• (sacp-conductor) introduce Component trait for better semantics

1.0.0-alpha.3 - 2025-11-09

Added

• (sacp-conductor) implement lazy component initialization
• (sacp-conductor) add ComponentList trait for lazy component instantiation

Fixed

• (sacp-conductor) prevent response messages from overtaking notifications

Other

• Merge pull request #18 from nikomatsakis/main
• (sacp-conductor) document lazy initialization and ComponentList trait
• (sacp-conductor) use if-let and assert in lazy initialization
• (sacp-conductor) route all message forwarding through central queue
• (sacp-conductor) decouple message handler from component count

1.0.0-alpha.2 - 2025-11-08

Added

• (sacp) add convenience methods for common connection patterns

Other

• fix doctests for API refactoring
• wip wip wip
• wipwipwip
• [breaking] remove Unpin bounds and simplify transport API

0.2.0 - 2025-11-04

Fixed

• fix github url

Other

• (sacp-conductor) add comprehensive crate-level documentation
• (sacp) [breaking] rename json_rpc_cx to connection_cx
• rename JsonRpcRequest to JrRequest
• add READMEs for sacp-tokio, sacp-proxy, and sacp-conductor

0.1.1 - 2025-10-30

Fixed

• replace crate::Error with sacp::Error in dependent crates

Other

• remove more uses of agent_client_protocl_schema
• replace acp:: with crate::/sacp:: throughout codebase
• rename JsonRpc* types to Jr* across all crates
• (deps) switch from agent-client-protocol to agent-client-protocol-schema
• prepare release-plz