Function decideHook

decideHook(
    exitCode: number,
    json: HookOutput | null,
    protocol?: HookProtocol,
): {
    blocked: boolean;
    blockedBy: readonly BlockMechanism[];
    decision: "approve" | "block" | "allow" | "deny" | "ask" | undefined;
    haltsTurn: boolean;
}
Decide whether a hook result blocked, and the normalized decision. Pure, so the policy is unit-testable independent of spawning anything.

Folds the closed BLOCK_MECHANISMS table rather than testing three conditions inline, so a mechanism cannot be declared and left unhandled.
Parameters
- exitCode: number
- json: HookOutput | null
- protocol: HookProtocol = claudeCodeHookProtocol
Returns {
    blocked: boolean;
    blockedBy: readonly BlockMechanism[];
    decision: "approve" | "block" | "allow" | "deny" | "ask" | undefined;
    haltsTurn: boolean;
}
- Defined in src/run-hook.ts:442