feat(ag-ui): add interrupt durability and align adapter resume retry - #1072
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enabled auto-merge (squash)
September 8, 2026 20:40
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Interrupt resumes now retain the exact decision and associated input for retry. LangGraph preserves valid null-payload resume commands; AG-UI owns the complete pending batch, validates claims, rolls failed protocol state back, and supports optional atomic persistence and authoritative reconciliation.
AG-UI now rejects bare resumes and unrelated input while an interrupt is unresolved. Native batches take precedence in auto mode; explicit compatibility profiles preserve command-based backends. Provider disposal and stale-callback guards prevent completed lifetimes from changing state. Migration guidance and generated API documentation are included.
Validation: 1,998 tests passed across chat, LangGraph, and AG-UI; type checks and production library builds passed; lint passed with warnings. Shared conformance covers combined input, intentional retry, restoration, and disposal. Real-client tests cover durable claims, reconciliation, restored tool identity, and replacement batches. AG-UI interrupt and streaming consumer builds also passed under their non-strict TypeScript configuration. Local Chrome MCP smoke passed against the repository fixture backend: normal chat, approval pause, resume producing the approved tool result and a replacement pending batch, and blocked Enter preserving the composer draft with no extra request or browser console errors. The smoke test exposed an enabled composer during pauses; the follow-up adds an optional input-blocked signal and covers hydration as well.
Packaged consumers now require AG-UI SDK 0.0.59 for the interrupt schema exports. Fresh Angular 20, 21, and 22 packaged consumer production builds and all 44 smoke-generator / Angular-support tests passed. Angular 20 and 21 runtime compatibility checks passed locally. The smoke scaffold loads its compatibility probes in a separate chunk, preserving all runtime assertions while keeping the initial bundle below the unchanged 2 MB budget.
The Mastra example now reads retained compatibility details from the interrupt session and explicitly selects its command transport. All five Mastra end-to-end tests passed locally, including campsite details and approval/resume.
Durable storage, backend reconciliation, and server-side idempotency remain application responsibilities.