feat(a2a): wire AgentCard modality capabilities at bootstrap#3464
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feat(a2a): wire AgentCard modality capabilities at bootstrap#3464
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Derive images/audio/files flags on the default AgentCard from runtime signals at A2A server bootstrap: - images: provider.supports_vision() - audio: stt_provider_entry config presence - files: new opt-in config field a2a.advertise_files (default false) Extract build_default_card() helper in src/daemon.rs. Add advertise_files field to A2aServerConfig with serde default. Closes #3378
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Summary
images/audio/filesflags on the defaultAgentCardfrom runtime signals at A2A server bootstrapbuild_default_card()helper insrc/daemon.rsto keep the bootstrap cleanadvertise_files: bool(defaultfalse) toA2aServerConfiginzeph-configDetection logic
imagesprovider.supports_vision()audioconfig.llm.stt_provider_entry().is_some()filesconfig.a2a.advertise_files(opt-in, defaultfalse)Known limitation
Daemon mode does not wire STT at runtime yet, so
audio=truemay be advertised even though audio parts are silently dropped. A separate P3 issue should track STT wiring inrun_daemon.Test plan
cargo nextest run --workspace --lib --bins— 8602 tests passcargo +nightly fmt --check— cleancargo clippy --workspace -- -D warnings— clean[a2a]enabled and vision-capable provider; verifyGET /AgentCard response shows"images": trueadvertise_files = true; verify"files": truein AgentCardCloses #3378