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Add canvas artifact RPC foundation for A2UI

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William Valentin
2026-02-16 12:36:02 -08:00
parent fe8674e108
commit 8a0b4f3dbb
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README.md
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@@ -870,6 +870,17 @@ Methods:
- `system.location` provides an operator view of registered node locations.
- `system.capabilities` returns gateway protocol and node policy snapshot.
## Canvas / A2UI Foundation
Gateway provides a session-scoped canvas artifact API for companion/UI surfaces:
- `canvas.put` upserts an artifact (`artifactId`, `type`, `content`, optional `title`/`metadata`).
- `canvas.get` retrieves a single artifact.
- `canvas.list` lists artifacts for a session (most recently updated first).
- `canvas.delete` removes one artifact.
- `canvas.clear` removes all artifacts for a session.
This foundation is currently in-memory (runtime ephemeral) and intended as the first step for richer visual workspace flows.
## Gateway Request Body Limit
Cap inbound HTTP POST body size (webhooks and Gmail push) to reduce memory-DoS risk.