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c10d74ba95
Response-consumer cancellation already stopped lineage reads, persistence reads, and ZIP production, but the final attachment phase called readImage without the producer signal. A slow or stalled attachment backend could therefore keep working after the browser abandoned the download and prevent the producer from settling.\n\nExtend the attachment read seam with optional cancellation, forward it through the local backend into Node's filesystem read, and preserve the abort reason rather than wrapping it as a storage failure. The exporter now passes its combined request/consumer signal to every attachment read.\n\nCover both ownership boundaries: the local-store test proves filesystem forwarding and cancellation identity, while the assembled export test cancels a reader during a pending attachment provider call. Regenerate the Cordis API catalog and paired documentation so implementers can rely on the new contract.
attachment/ - durable attachment capability family
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The durable binary attachment seam and its local filesystem implementation. Both are product packages.
| Package | Role | ctx key |
|---|---|---|
attachment/ |
Immutable attachment references, image limits, and storage service | ctx.attachments |
attachment-local/ |
Content-addressed private storage below DSH_HOME |
(registers on ctx.attachments) |
Unsent browser drafts are intentionally outside this capability. Bytes enter durable storage only when a user prompt is submitted or when a provider adapter commits structured model output.