/**
 * The environment a spawned child inherits: which of this process's variables it must not see.
 *
 * A child the engine spawns may run what the MODEL chose (a tool shell, a gate over model-written code, a language
 * server). Under the `"scrub"` policy (the default) it inherits every variable but those the judgment below names —
 * deleted whole, never rewritten; `"all"` and a `string[]` allow list are the caller's explicit alternatives
 * ({@link inheritedHostEnv}). One judgment per variable ({@link classifySecretEnvEntry}), the first rule that answers:
 *   1. exempt — git's environment config and the proxy variables, handed on as written ({@link isExemptEnvName});
 *   2. `exact-name` — a known credential name ({@link CREDENTIAL_ENV_NAMES});
 *   3. `prefix-rule` — the OpenTelemetry settings ({@link OTEL_ENV_RE});
 *   4. `namespace-rule` — a credential word as any segment of a name in the engine's own `SEMA_` namespace;
 *   5. `name-rule` — a credential-shaped name ({@link nameIsCredentialShaped}) off {@link NON_SECRET_ENV_EXACT_NAMES};
 *   6. `value-rule` — a value that carries a credential ({@link valueCarriesCredential}).
 * {@link isSecretEnvKey} and {@link scrubSecretEnv} both answer with this one judgment. The exempt families, the
 * credential names, the name shape and the value predicate follow the reference implementation's subprocess-env scrub
 * as written, three ways stricter: plural `TOKENS` is a credential word unless a count word touches it, the GitHub
 * token names are not held back from the name shape, and the name shape always runs.
 */
import type { RedactionConfidence, RedactionSource } from "./arg-summary.js";
import { type EngineNotice } from "./engine-notice.js";
/** Which rule withheld an entry. */
export type SecretEnvFindingKind = "exact-name" | "name-rule" | "namespace-rule" | "prefix-rule" | "value-rule";
/** One env entry the `"scrub"` policy withheld (deleted): its name — never its value, so the record is loggable —, the
 *  rule that withheld it, how strong that claim is, and the minting module. */
export interface SecretEnvFinding {
    key: string;
    kind: SecretEnvFindingKind;
    confidence: RedactionConfidence;
    source: RedactionSource;
}
/** Does the `"scrub"` policy withhold `key`? With `value`, exactly the answer {@link scrubSecretEnv} gives for that
 *  entry; without it, the answer for its name alone (the value rule then has nothing to read). */
export declare function isSecretEnvKey(key: string, value?: string): boolean;
/** The `"scrub"` policy: `env` without every entry {@link isSecretEnvKey} withholds, the rest as written. `findings` is
 *  an optional caller-owned collector: each withheld entry is pushed onto it (name, rule, confidence), none of them
 *  present in the result. `env` itself is not modified. */
export declare function scrubSecretEnv(env: NodeJS.ProcessEnv, findings?: SecretEnvFinding[]): NodeJS.ProcessEnv;
/** How much of this process's environment a child spawned on this host inherits — the `inheritEnv` value. */
export type InheritEnvPolicy = "all" | "scrub" | string[];
/**
 * The environment a child spawned ON THIS HOST inherits, by an {@link InheritEnvPolicy}: `"scrub"` (and absent) is
 * this process's environment through {@link scrubSecretEnv}; `"all"` is this process's environment
 * verbatim (the explicit opt-out); a `string[]` is exactly the named variables that are set, verbatim — a strict allow
 * list, so a name it leaves out (`PATH` included) is not inherited. `findings` collects what the scrub withheld, and
 * only the `"scrub"` arm adds to it. Any other value reads as `"scrub"`; both spawn sites that take a policy — the
 * tool shell's `NodeExecutionEnv` (at construction) and the oracle gate (per gate) — refuse a malformed one through
 * {@link inheritEnvPolicyProblem} before it gets here.
 */
export declare function inheritedHostEnv(policy: InheritEnvPolicy | undefined, findings?: SecretEnvFinding[]): NodeJS.ProcessEnv;
/** Why `value` is not an {@link InheritEnvPolicy} (absent counts as one — the scrub), or `undefined` when it is. */
export declare function inheritEnvPolicyProblem(value: unknown): string | undefined;
/** Test seam: never called by production code. */
export declare function __resetSecretEnvScrubNoticeAnnouncement(): void;
/**
 * The ONE disclosure point for a scrub's withheld keys. Routed through {@link deliverEngineNotice} — the
 * engine's one notice throat — so a wired `onNotice` seat REPLACES the console line exactly as every
 * other `EngineNotice` does, and an absent seat prints the same words `console.warn` always printed here.
 * `detail.names` carries every withheld key. Once per PROCESS, never per call or per site; an EMPTY
 * findings array is a no-op.
 */
export declare function announceSecretEnvScrub(onNotice: ((notice: EngineNotice) => void) | undefined, findings: readonly SecretEnvFinding[]): void;