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@tanstack/ai-sandbox

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Provider-agnostic sandbox layer for TanStack AI — run harness adapters inside isolated sandboxes (defineSandbox, defineWorkspace, withSandbox) with a uniform SandboxHandle, workspace bootstrap, policy, and resumable lifecycle.

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import { InternalLogger } from '@tanstack/ai/adapter-internals'; import { RunRecord } from '@tanstack/ai'; import { SandboxProvider } from './contracts.js'; import { SandboxInstanceStore } from './instance-store.js'; export interface ReclaimSandboxOptions { provider: SandboxProvider; instances: SandboxInstanceStore; logger?: InternalLogger; } export type ReclaimOutcome = /** The provider was asked to destroy it and the instance record is gone. */ 'destroyed' /** * The provider's `destroy` THREW. The instance record was still deleted (see * the ordering note on {@link reclaimSandbox}), so the sandbox — if it is in * fact still running — is now unreachable from here and bills until the * provider's own idle reclamation, if any. * * This is the one outcome that means the cost leak the reaper exists to stop * is still leaking, so it is reported distinctly instead of being folded into * `'destroyed'`, and {@link sandboxReclaimer} logs it above debug level. */ | 'destroy-failed' /** The run never ran in a sandbox. */ | 'no-sandbox-key' /** No instance record for that key; nothing to do. */ | 'not-found' /** The record belongs to a different provider; refused. */ | 'provider-mismatch'; /** * Destroy the sandbox a terminal run was bound to. * * Two orderings are load-bearing: * * - **The provider check before either `destroy` or `delete`.** A multi-provider * application would otherwise hand a Docker container id to Daytona's * `destroy`, which at best errors and at worst matches an unrelated sandbox * in the other provider's id namespace. Getting this wrong destroys a * stranger's workload, so it is the first gate — a mismatch touches NOTHING, * including the record, which the right provider still needs. * - **`destroy` before `delete`, and `delete` regardless of whether `destroy` * succeeded.** The provider sandbox may already be gone (idle-reclaimed, the * region wiped, the container pruned). Keeping an instance record that points * at nothing guarantees a failed `resume` on the thread's next turn, which is * strictly worse than an orphaned provider sandbox — one is a broken user * experience, the other is a bounded cost the provider itself will reclaim. * The delete is therefore unconditional — but a failed `destroy` returns * `'destroy-failed'`, not `'destroyed'`: the record is gone either way, and an * operator has to be able to tell "torn down" from "possibly still billing and * no longer reachable from here". */ export declare function reclaimSandbox(record: RunRecord, options: ReclaimSandboxOptions): Promise<ReclaimOutcome>; /** * Thrown by {@link sandboxReclaimer} when {@link reclaimSandbox} answers * `'destroy-failed'`. * * WHY AN EXCEPTION AND NOT A RETURN VALUE. `ReapOptions.reclaim` is * `(record) => Promise<void>`, and the sweep's only channel for "the sandbox was * NOT reclaimed" is a rejection — `reapOne` catches one and reports the run * `'reclaim-failed'` with its `status` and `exitCode` intact. A reclaimer that * logged this arm and returned normally therefore reported `'finalized'`, and * `outcomes['reclaim-failed']` read `0` on precisely the leak it watches for. * * It carries no `cause`: `reclaimSandbox` returns a {@link ReclaimOutcome}, not * the provider's rejection, and widening that return to smuggle the error out * would change an outcome contract whose ordering and arms are load-bearing. The * underlying `destroy` rejection is on `reclaimSandbox`'s own `warn` line, which * carries the same `runId` and `sandboxKey` this error does. */ export declare class SandboxReclaimFailedError extends Error { readonly runId: string; /** Absent only in the impossible case; see the throw site in `sandboxReclaimer`. */ readonly sandboxKey: string | undefined; constructor(runId: string, sandboxKey: string | undefined); } /** * Adapt {@link reclaimSandbox} to `ReapOptions.reclaim`. * * REJECTS on `'destroy-failed'` — see {@link SandboxReclaimFailedError} for why * that arm must not resolve. Every other outcome resolves: `'destroyed'` did the * job, and `'no-sandbox-key'` / `'not-found'` / `'provider-mismatch'` all mean * there is nothing for this reclaimer to tear down, which is not a sweep failure. */ export declare function sandboxReclaimer(options: ReclaimSandboxOptions): (record: RunRecord) => Promise<void>;