A TypeScript Memory Layer: Define the Contract Before the SDK

A TypeScript memory layer should use a focused application contract that separates identity, retrieval, and write operations from provider-specific SDKs while recognizing that type safety does not replace runtime authorization or provider validation. Tenant, user, and conversation identities should be derived from authenticated application context and kept outside model control, with validated scopes preventing tools from accessing other customers’ data. Retrieval should return clear statuses, evidence identifiers, versions, and provenance alongside content so applications can distinguish empty results from failures and treat retrieved instructions as untrusted material within deliberately limited context. Write operations should explicitly differentiate source capture, correction, forgetting, and deletion, preserve source IDs across retries, and communicate whether accepted data is immediately searchable or still being processed. Developers should test adapter logic separately from configured provider behavior, including isolation, corrections, and removal scenarios, and begin integrations with a single application route while retaining contract tests as the system expands.

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