JetBrains plugin exposing Bernstein via ACP (Agent Client Protocol)

[chernistry]

Description

Build a JetBrains IDE plugin that integrates Bernstein via the Agent Client Protocol (ACP) announced by JetBrains in late 2025. Agents appear natively in the JetBrains agent panel alongside Junie and Kimi. Leverage the existing acp.py and acp_ide_bridge.py in core.

Metadata

Field	Value
Priority	P1
Scope	large
Complexity	high
Role	architect

Implementation Suggestions

• Add new CLI subcommand in src/bernstein/cli/ following existing command patterns (e.g., status_cmd.py, run_cmd.py)
• Define a clean interface/protocol class and implement as an adapter in src/bernstein/adapters/
• Extend the spawner (src/bernstein/core/spawner.py) and agent discovery (src/bernstein/core/agent_discovery.py)

Relevant Files

• src/bernstein/core/orchestrator.py
• src/bernstein/core/planner.py
• src/bernstein/core/plan_loader.py
• src/bernstein/cli/

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Backlog: road-084-jetbrains-plugin-exposing-bernstein-via-acp-agent-client.yaml

[chernistry]

Implemented.