feat(server): implement A2A stdio transport for local agent-as-subprocess mode #9650

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opened 2026-04-15 01:16:36 +00:00 by HAL9000 · 0 comments

HAL9000 commented

2026-04-15 01:16:36 +00:00

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Metadata

Commit message: feat(server): implement A2A stdio transport for local agent subprocess mode
Branch name: feat/v3.8.0-a2a-stdio-transport
Parent Epic: #8677
Milestone: v3.8.0

Background and Context

The A2A stdio transport enables local mode where the agent runs as a subprocess communicating via stdin/stdout. This transport is essential for local development and testing scenarios where agents are spawned as child processes.

Expected Behavior

Current Behavior

No A2A stdio transport exists for local agent-as-subprocess mode.

Expected Behavior

A2A stdio transport is implemented and functional
Agent can run as a subprocess communicating via stdin/stdout
The transport correctly frames and delivers JSON-RPC 2.0 messages over stdio

Acceptance Criteria

A2A stdio transport is implemented
Agent can run as a subprocess communicating via stdin/stdout
Integration tests pass with coverage >= 97%

Subtasks

Implement A2A stdio transport layer
Implement subprocess communication protocol
Write integration tests
Verify coverage >= 97%

Definition of Done

This issue should be closed when:

A2A stdio transport is fully implemented and reviewed
Agent subprocess communication via stdin/stdout is functional and tested
All integration tests pass with >= 97% coverage
Code has been reviewed and merged into the feat/v3.8.0-a2a-stdio-transport branch
Parent Epic #8677 dependency is satisfied by this implementation

Automated by CleverAgents Bot
Supervisor: Epic Planning | Agent: epic-planning-pool-supervisor [AUTO-EPIC-5]

## Metadata - **Commit message:** `feat(server): implement A2A stdio transport for local agent subprocess mode` - **Branch name:** `feat/v3.8.0-a2a-stdio-transport` - **Parent Epic:** #8677 - **Milestone:** v3.8.0 ## Background and Context The A2A stdio transport enables local mode where the agent runs as a subprocess communicating via stdin/stdout. This transport is essential for local development and testing scenarios where agents are spawned as child processes. ## Expected Behavior ### Current Behavior No A2A stdio transport exists for local agent-as-subprocess mode. ### Expected Behavior - A2A stdio transport is implemented and functional - Agent can run as a subprocess communicating via stdin/stdout - The transport correctly frames and delivers JSON-RPC 2.0 messages over stdio ## Acceptance Criteria - [ ] A2A stdio transport is implemented - [ ] Agent can run as a subprocess communicating via stdin/stdout - [ ] Integration tests pass with coverage >= 97% ## Subtasks - [ ] Implement A2A stdio transport layer - [ ] Implement subprocess communication protocol - [ ] Write integration tests - [ ] Verify coverage >= 97% ## Definition of Done This issue should be closed when: 1. A2A stdio transport is fully implemented and reviewed 2. Agent subprocess communication via stdin/stdout is functional and tested 3. All integration tests pass with >= 97% coverage 4. Code has been reviewed and merged into the `feat/v3.8.0-a2a-stdio-transport` branch 5. Parent Epic #8677 dependency is satisfied by this implementation --- **Automated by CleverAgents Bot** Supervisor: Epic Planning | Agent: epic-planning-pool-supervisor [AUTO-EPIC-5]