Store ≥1 fact in long-term memory for future sessions.

Use: durable, reusable knowledge—user preferences, project decisions, architectural choices; anything improving future responses. No ephemeral task state.

{{#if globalScope}}`scope: global` stores an item in the shared bank every project recalls; reserve it for cross-project preferences and facts.
{{/if}}Each item MUST be specific, self-contained: who, what, when, why. Batch related facts per call; deduplicated and consolidated.