Multi-agent orchestration via A2A delegation

[pavelanni]

Summary

Enable agent-to-agent delegation using the A2A protocol so DocsClaw agents can orchestrate work across multiple specialized agents.

Motivation

Complex tasks benefit from delegation to specialized agents. The A2A protocol already supports this pattern and DocsClaw has the bridge infrastructure in internal/bridge/.

Acceptance criteria

• Agent can discover and delegate tasks to other A2A-compatible agents
• Delegation context propagation (permissions, identity)
• Configurable delegation targets via agent-config.yaml
• Integration with zero-trust mode (SPIFFE/OPA)

From roadmap: docs/slides/docsclaw-intro.html, slide 6