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21 lines
538 B
TypeScript
21 lines
538 B
TypeScript
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/**
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* @license
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* Copyright 2026 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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import { createHash } from 'node:crypto';
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/**
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* Derives a stable, deterministic ID from a list of source IDs.
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* Used for synthetic turns like summaries to ensure that re-summarizing the same
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* content produces a consistent identity.
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*/
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export function deriveStableId(sourceIds: string[]): string {
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const sortedIds = [...sourceIds].sort();
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return createHash('sha256')
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.update(sortedIds.join('|'))
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.digest('hex')
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.slice(0, 32);
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}
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