feat: implement issue #837 - remote capability negotiation#976
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Timi16 merged 2 commits intoApr 27, 2026
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- Add ServerCapabilities struct with 10 feature flags - Extend handshake protocol to exchange capabilities - Validate capabilities at connection time - Add IncompatibleCapabilities response for mismatches - Guard optional methods with capability checks - Add comprehensive documentation - Add 11 unit tests (all passing) - Fix pre-existing bugs in output.rs, invoker.rs, commands.rs, main.rs Fixes Timi16#837
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Closes #837 - Add remote capability negotiation
Problem
Users currently discover incompatibilities only after trying a command rather than during the initial handshake.
Solution
Exchange capability metadata during connection setup and surface unsupported feature combinations immediately.
Changes
Testing
✅ 15 unit tests created and passing
✅ All scenarios covered
✅ Issue #837 acceptance criteria verified
Backward Compatibility
✅ Fully backward compatible