feat(runtime/claude): multimodal I/O support — accept inbound images (#396)#522
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alexey-pelykh merged 1 commit intomainfrom Mar 9, 2026
Merged
feat(runtime/claude): multimodal I/O support — accept inbound images (#396)#522alexey-pelykh merged 1 commit intomainfrom
alexey-pelykh merged 1 commit intomainfrom
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…396) Switch from --print to --input-format stream-json stdin mode when image media is present, constructing user message envelopes with base64 image content blocks. Non-image media (audio/video) is silently filtered out as Claude CLI only supports images natively. Changes: - Add buildStdinPayload() hook to CLIRuntimeBase for custom stdin delivery - Override buildStdinPayload() in ClaudeCliRuntime for stream-json envelopes - Add prepareMedia() to read image files and populate base64 fields - Switch buildArgs() to use -p --input-format stream-json for image media - Add unit tests for buildArgs, buildStdinPayload, mediaCapabilities - Add live smoke test with 100x100 red PNG verifying Claude describes it Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
--input-format stream-jsonstdin modebuildStdinPayload()hook toCLIRuntimeBasefor custom stdin deliveryprepareMedia()reads image files from disk and populates base64 fieldsimage/*is acceptedmediaCapabilitiesdeclaresacceptsInbound: ["image/"],emitsOutbound: falseTest plan
buildArgswith image media →-p --input-format stream-json(no--print)buildArgswithout media →--print(backwards compat)buildArgswith non-image media →--print(ignores audio/video)buildStdinPayloadconstructs correct{ type: "user", message: {...} }envelopebuildStdinPayloadreturns undefined for non-image/missing mediamediaCapabilitiesreports correct valuesCloses #396
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