Add CLI command for A2A protocol server management#1

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Copilot wants to merge 12 commits intodevfrom

copilot/expose-opencode-capabilities-a2a

Commits on Feb 5, 2026

Initial plan
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Add A2A protocol implementation with core components and routes

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jgranesa
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Remove A2A SDK runtime dependencies, implement protocol directly

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jgranesa
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Add A2A tests and remove unused dependency from package.json

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jgranesa
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Add comprehensive A2A protocol documentation

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jgranesa
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Fix code review issues: improve type safety and URL handling

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jgranesa
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Improve URL path manipulation for REST endpoint

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jgranesa
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