LangGraph: Approval interrupts must reach the runtime
Does a broad exception handler around LangGraph interrupt preserve the approval pause?
LangGraph documents interrupt as a special exception used to suspend execution. A broad try/except can intercept it before the runtime receives the pause signal; the guide separates interrupts from error handling or catches specific error types.
Documentation reviewed 2026-10-31. Primary source.
Boundaries
- Refuse to infer that an approval gate paused the run merely because the code called interrupt; inspect exception propagation and the persisted interruption before allowing the dependent action.
- Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.
- No expanded capabilities or licences for existing INDEX executables.
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LangGraph: Resume values follow interrupt position
Can reordered LangGraph interrupts reuse the original approval values safely?
Within a LangGraph node, saved resume values are matched to interrupt calls by position in the task-specific list. The documented rule requires a consistent call order and warns against conditional skipping or nondeterministic loops.
Documentation reviewed 2026-10-31. Primary source.
Boundaries
- Refuse an approval-to-action match when interrupt order or branch selection changed; establish the exact question, payload and resume position for the paused run.
- Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.
- No expanded capabilities or licences for existing INDEX executables.
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LangGraph: Returned output can differ from saved state
Does a LangGraph Functional API response necessarily equal the state saved for the next invocation?
LangGraph entrypoint.final can return one value while saving another in the checkpoint. The saved value supplies previous on a later invocation; recording only the caller-visible response can omit that distinct continuation state.
Documentation reviewed 2026-10-31. Primary source.
Boundaries
- Do not reconstruct the next invocation from the response alone when entrypoint.final is used; retain both returned and saved values with their thread and checkpoint identities.
- Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.
- No expanded capabilities or licences for existing INDEX executables.
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LangGraph: Forking preserves the original history
Does LangGraph update_state roll back the original execution history?
The LangGraph time-travel guide states that update_state creates a new checkpoint branching from the chosen point. The original execution history remains intact; the operation is a fork rather than a rollback.
Documentation reviewed 2026-10-31. Primary source.
Boundaries
- Do not treat a fork as reversal of original external actions or deletion of earlier history. Reconcile branch identity and any required external compensation separately.
- Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.
- No expanded capabilities or licences for existing INDEX executables.
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LangGraph: State attribution is not node execution
Does a LangGraph checkpoint attributed through as_node prove that node actually ran?
For update_state, LangGraph applies the selected node writers and records that node as the update producer; execution continues at its successors. The guide explicitly allows choosing a later as_node to skip nodes.
Documentation reviewed 2026-10-31. Primary source.
Boundaries
- Refuse to use as_node attribution alone as evidence of executed approval, payment or validation work; obtain independent execution and outcome evidence for any skipped node.
- Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.
- No expanded capabilities or licences for existing INDEX executables.
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LangGraph: State repair uses configured reducers
Does updating a LangGraph state field always replace its previous value?
LangGraph state updates use the configured field reducer. An additive reducer can merge new values into accumulated state; the documented Overwrite wrapper bypasses the reducer when explicit replacement is intended.
Documentation reviewed 2026-10-31. Primary source.
Boundaries
- Do not assume a repair removed an earlier approval or evidence item. Inspect the reducer, resulting state and deliberate replacement operation before relying on the corrected state.
- Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.
- No expanded capabilities or licences for existing INDEX executables.
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LangGraph: Subgraph replay needs the right checkpoint scope
Can a parent LangGraph checkpoint replay only the second approval inside a default subgraph?
The time-travel guide treats a default subgraph as one parent-level super-step. Replaying from before it runs the subgraph from the start; its own checkpointer provides internal checkpoint history for finer replay selection.
Documentation reviewed 2026-10-31. Primary source.
Boundaries
- Do not promise selective replay of one internal approval without a matching subgraph checkpoint. Identify the replay scope and separately reconcile any repeated external actions.
- Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.
- No expanded capabilities or licences for existing INDEX executables.
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LangGraph: Timed-out state writes do not settle external outcomes
Does a LangGraph node timeout prove that the node made no external change?
LangGraph documents per-attempt timeouts for async nodes and states that timed-out attempts do not commit buffered state writes or child-task scheduling. A configured retry may start another attempt with a fresh timeout.
Documentation reviewed 2026-10-31. Primary source.
Boundaries
- Local buffered-write suppression does not establish reversal or absence of an external API effect. Reconcile that effect before retrying; per-attempt limits do not establish a whole-workflow deadline. Node timeout support requires LangGraph 1.2 or later.
- Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.
- No expanded capabilities or licences for existing INDEX executables.
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MCP: Progress resets do not remove the maximum deadline
Can ongoing MCP progress notifications justify waiting indefinitely for a request?
MCP revision 2026-07-28 permits resetting a request timeout on progress notifications but recommends an enforced maximum timeout regardless of progress. It also recommends configurable per-request timeouts.
Documentation reviewed 2026-10-31. Primary source.
Boundaries
- Do not equate a refreshed idle timer with a bounded total duration or successful action. Check the maximum deadline and reconcile any ambiguous external result after cancellation. These are SHOULD requirements, not verified client behaviour.
- Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.
- No expanded capabilities or licences for existing INDEX executables.
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Mem0: History inputs are not a per-fact source proof
Does a Mem0 memory-history response prove which exact source sentence supports each stored fact?
The Mem0 Platform history schema describes entries for a memory ID, conversation input with roles and content, old and new memory text, event type and timestamps. It describes conversation-level change context, not a guaranteed per-fact source-span mapping.
Documentation reviewed 2026-10-31. Primary source.
Boundaries
- Use history to reconstruct the recorded change, but refuse exact sentence attribution or factual verification without a separately retained fact-to-source mapping. This review does not assert absence of other product features.
- Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.
- No expanded capabilities or licences for existing INDEX executables.
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Mem0: Provenance filters depend on the storage adapter
Does a successful Mem0 OSS search prove every provenance metadata filter was applied?
Mem0 OSS documents different metadata-filter support across vector stores. Some unsupported operators are ignored or reduced to equality, and the reviewed Weaviate adapter table limits filtering to exact user, agent and run identifiers.
Documentation reviewed 2026-10-31. Primary source.
Boundaries
- Refuse a provenance-filtered result claim from request success alone. Check the exact adapter/version and returned records against each requested clause; metadata labels are not independently verified source facts.
- Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.
- No expanded capabilities or licences for existing INDEX executables.
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Mem0: Retrieval score explains ranking, not truth
Does a high Mem0 OSS search score establish that a remembered statement is factually reliable?
Mem0 documents OSS score_details as a breakdown of semantic similarity, normalized BM25, entity boost, combined score and filtering threshold. The optional explain flag exposes how a result ranked.
Documentation reviewed 2026-10-31. Primary source.
Boundaries
- Treat the score as retrieval evidence, not calibrated factual confidence or proof of user assertion. Verify source content and attribution separately before acting on the remembered statement.
- Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.
- No expanded capabilities or licences for existing INDEX executables.
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Mem0: Mixed raw and inferred inserts can duplicate a fact
Does storing a fact through both raw and inferred Mem0 add paths produce independent corroborating evidence?
Mem0 documents that infer=False stores the supplied payload without inference and can admit duplicates. Adding the same content later with infer=True can create a second memory.
Documentation reviewed 2026-10-31. Primary source.
Boundaries
- Do not count matching memories as independent corroboration without comparing original sources and ingestion mode. Reconcile duplicate identities rather than inferring multiple independent observations.
- Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.
- No expanded capabilities or licences for existing INDEX executables.
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