54 lines
2.3 KiB
TypeScript
54 lines
2.3 KiB
TypeScript
/**
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* Per-session sandbox-mode override: the session log as the store.
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* @module dsh-bash/session-mode
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*/
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import type { Session, SessionEvent } from '@deepseek-ai/dsh-session'
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import type { SandboxMode } from '@deepseek-ai/dsh-sandbox'
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declare module '@deepseek-ai/dsh-session' {
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interface SessionEventMap {
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/**
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* The session's sandbox mode was switched — log-only (like `approval/*`;
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* NOT a surface event, carries no `surfaceOp`): durable and replayable,
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* never in the model transcript. The LAST such event is the session's
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* override ({@link effectiveSandboxMode}); who asked for it is derivable
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* from position (an event after the log's last `request/header*` was a
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* runtime switch by the user; see the tool layer's narrator).
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*/
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'bash/sandbox-mode': { mode: SandboxMode }
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}
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}
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/** Every {@link SandboxMode}, for option advertisement and runtime validation of untrusted mode strings. */
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export const SANDBOX_MODES: readonly SandboxMode[] = ['read-only', 'workspace-write', 'danger-full-access']
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/**
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* The session's sandbox-mode override: the last `bash/sandbox-mode` event in
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* the log, or undefined when the session never switched (callers apply the
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* executor's configured default). The pure fold — resume needs no catch-up
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* machinery because replaying the log IS the state.
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* @param events - session events in log order (other event types are skipped).
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* @returns the mode of the last switch event, or undefined without one.
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*/
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export function effectiveSandboxMode(events: readonly SessionEvent[]): SandboxMode | undefined {
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for (let index = events.length - 1; index >= 0; index -= 1) {
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const event = events[index] as SessionEvent
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if (event.type === 'bash/sandbox-mode') return event.data.mode
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}
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return undefined
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}
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/**
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* THE write path for a session's sandbox-mode override: appends exactly one
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* `bash/sandbox-mode` event — the switch IS its event; nothing mutates mode
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* state out of band. Takes effect on the session's next bash call and next
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* prompt assembly (the consumers fold on every read).
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* @param session - the session the override belongs to.
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* @param mode - the mode every subsequent bash call in this session runs
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* under (until the next switch).
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*/
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export function setSandboxMode(session: Session, mode: SandboxMode): void {
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session.append('bash/sandbox-mode', { mode })
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}
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