@juspay/neurolink/dist/lib/utils/cloneOptions.js

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/**
 * The set of top-level branches on a `StreamOptions` / `GenerateOptions`
 * / `DynamicOptions` bag that downstream prep stages mutate. Listed here
 * once so the runtime clone (`cloneOptionsForCallIsolation`) and any
 * future test that wants to assert call isolation reference the same
 * source of truth.
 *
 * If you add a new top-level field to `StreamOptions` that gets mutated
 * by prepareStreamOptions / applyStreamOrchestration / RAG/MCP injection
 * / memory retrieval / etc., add it here AND add an entry to
 * `test/helpers/cloneOptions.test.ts` so the isolation guarantee gets
 * exercised.
 *
 * Branches that are deliberately NOT cloned (and why):
 *   - `signal` / `abortSignal` — `AbortSignal` can't be `structuredClone`d
 *     and a shallow copy would strip the listener wiring.
 *   - `tools[name].execute` — function identity is used as a cache key
 *     downstream; cloning would break that.
 *   - schema objects (zod / JSON Schema) — large, frequently frozen,
 *     and not mutated by NeuroLink internals.
 */
export const CLONE_MUTABLE_OPTION_BRANCHES = [
    "input",
    "context",
    "memory",
    "tools",
    "middleware",
    "rag",
    "csvOptions",
    "stt",
    "tts",
];
/**
 * Defensive call-isolation clone for stream() / generate()-shaped inputs.
 *
 * Shallow-clones the top-level options bag plus every branch listed in
 * `CLONE_MUTABLE_OPTION_BRANCHES`. Caller-supplied objects can be reused
 * across calls without accumulating cross-call mutations from
 * prepareStreamOptions, applyStreamOrchestration, memory retrieval, or
 * RAG/MCP tool injection.
 *
 * Unclonable / by-reference values are deliberately kept by-reference —
 * cloning them would either fail outright (`structuredClone(AbortSignal)`)
 * or strip behavior (function identity used as a cache key).
 */
export function cloneOptionsForCallIsolation(options) {
    if (!options || typeof options !== "object") {
        return options;
    }
    const cloned = { ...options };
    const o = cloned;
    for (const branch of CLONE_MUTABLE_OPTION_BRANCHES) {
        const value = o[branch];
        if (value && typeof value === "object") {
            o[branch] = Array.isArray(value)
                ? [...value]
                : { ...value };
        }
    }
    return cloned;
}
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