Merge remote-tracking branch 'origin/master' into codex/pr224-rfc-rewrite
# Conflicts: # docs/architecture.md # docs/capability-seams.md # docs/config-catalog.md # docs/cookbook/extension-cookbook.md # docs/cordis-catalog/events.md # docs/cordis-catalog/services.md # docs/event-producer-consumer.md # docs/module-graph.md # docs/rfc/implemented/feature/2026-06-30-interception-seams.md # docs/rfc/proposed/feature/2026-06-14-acp-agent-client-protocol.md # docs/tool-execution-pipeline.md # packages/cordis/tool-cordis/src/api-catalog.ts # packages/core/agent-core/README.md # packages/core/agent-loop/README.md # packages/core/tools/README.md # packages/core/tools/src/index.ts # packages/core/tools/tests/tools.spec.ts # packages/core/tools/tsconfig.json # packages/ui/acp/src/index.ts # scripts/doc-budgets.manifest.json # scripts/gen-cordis-catalog.ts # scripts/gen-doc-graphs.ts
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/**
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* Approval seam: `ctx.approval` answers exactly one question — "may this
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* specific action proceed?" — by dispatching the `approval/request` waterfall
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* to whatever answerers the deployment composed (an ACP editor prompt, an
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* auto-decide policy, a scripted test listener) and returning a closed
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* {@link ApprovalOutcome}. With no answerer the waterfall falls through to the
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* built-in default `'unavailable'`: absence of a UI can never grant anything.
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*
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* The service is the MECHANISM (dispatch, cancellation, audit); answerers are
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* the POLICY. It serves both ask paths the sandbox RFC names — the
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* `tools/pre-execute` `ask` decision and the sandbox post-denial escalation —
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* so every asker shares one outcome
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* vocabulary and one audit trail. Grants are one-shot by design: an
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* `'allowed-once'` outcome authorizes the single action it was asked about,
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* never a class of future actions.
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*
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* Every request lands two log-only session events on the requesting agent's
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* log (`approval/asked` / `approval/decided`, paired by
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* {@link ApprovalRequestId}) — an audit trail, deliberately NOT part of the
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* model-visible transcript: the model only ever sees the tool result the
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* caller derives from the outcome.
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*
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* The seam also owns the per-session POLICY tier (the sandbox RFC § Per-session mode switching):
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* `effective = fold(the session's 'approval/policy' events, last one wins)
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* ?? config.policy` — the session log is the store, so an override survives
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* restart by replay. The service resolves `'never'` sessions to
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* `'rejected'` inside `request()` before dispatching any answerer (no
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* registration order, including a later `prepend`, can precede it); a prompt section states `'never'`
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* (and only `'never'` — an availability promise is unknowable without
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* asking); an `agent/pre-step` narrator explains a switch to the model in at
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* most one coalesced notice per step.
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*
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* @module @deepseek-ai/dsh-user-approval
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*/
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import { randomUUID } from 'node:crypto'
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import { Context, Service } from 'cordis'
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import z from 'schemastery'
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import type { Branded } from '@deepseek-ai/dsh-brand'
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import type { Agent } from '@deepseek-ai/dsh-agent'
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import type { CallId } from '@deepseek-ai/dsh-llm'
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import { scopeTarget } from '@deepseek-ai/dsh-scope'
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import type { Scoped } from '@deepseek-ai/dsh-scope'
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import type { Session, SessionEvent } from '@deepseek-ai/dsh-session'
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import type {} from '@deepseek-ai/dsh-system-prompt'
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declare module 'cordis' {
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interface Context {
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approval: ApprovalService
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}
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interface Events {
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/**
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* Waterfall asking the composed answerers to decide one approval request.
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* Dispatched only from {@link ApprovalService.request} — callers go through
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* the service (which owns cancellation and the audit events), never through
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* `ctx.waterfall` directly. A listener that can answer for this request's
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* agent returns an outcome WITHOUT calling `next()` (the decision slot is
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* single-occupancy, first listener to answer wins); a listener that does
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* not recognize the agent MUST call `next()` so another answerer — or the
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* fail-closed default `'unavailable'` — gets the question. Throwing is
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* contained by the service and yields `'unavailable'`.
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* Scope-filtered dispatch (`@deepseek-ai/dsh-scope`) keys the carrier by `req.agent`: a
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* listener registered through `agent.ctx` receives only that agent's
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* questions, while a plain-context listener receives every agent's.
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* @param req - the pending decision (agent, tool identity, reason, signal).
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* @mode waterfall
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*/
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'approval/request'(this: Scoped<ApprovalService>, req: ApprovalRequest, next: () => Promise<ApprovalOutcome>): Promise<ApprovalOutcome>
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}
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}
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declare module '@deepseek-ai/dsh-session' {
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interface SessionEventMap {
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/**
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* An approval question was put to the answerer chain — log-only audit
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* (like `hook/*`; NOT a surface event, carries no `surfaceOp`). `id` pairs
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* it with the `approval/decided` that always follows; `toolName` is the
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* tool the question is about, `callId` the exact tool call when the asker
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* had one, `reason` the asker's human-readable explanation (e.g. a hook's
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* permission-decision reason).
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*/
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'approval/asked': {
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id: ApprovalRequestId
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toolName: string
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callId?: CallId
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reason?: string
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}
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/**
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* The outcome of a prior `approval/asked` (same `id`) — log-only audit.
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* Exactly one per ask, appended when the outcome is known: a decision, a
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* cancellation, or the fail-closed `'unavailable'`.
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*/
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'approval/decided': {
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id: ApprovalRequestId
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outcome: ApprovalOutcome
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}
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/**
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* The session's approval policy was switched — log-only, durable,
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* replayable, never in the model transcript (the model learns the policy
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* from the prompt section and the narrator's notices). The LAST such
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* event is the session's override ({@link effectiveApprovalPolicy});
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* who asked for it is derivable from position (an event after the log's
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* last `request/header*` was a runtime switch by the user).
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*/
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'approval/policy': { policy: ApprovalPolicy }
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}
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}
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/**
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* Pairs one `approval/asked` audit event with its `approval/decided`.
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* Service-issued (one fresh id per {@link ApprovalService.request} call).
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*/
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export type ApprovalRequestId = Branded<'ApprovalRequestId'>
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/**
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* Brand a string as an {@link ApprovalRequestId}.
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* @param id - the raw id string to brand.
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* @returns the same string carrying the brand.
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*/
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export function ApprovalRequestId(id: string): ApprovalRequestId {
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return id as ApprovalRequestId
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}
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/**
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* The closed outcome vocabulary of one approval request.
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*
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* - `'allowed-once'` — a one-shot grant for exactly the asked-about action;
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* consumed by proceeding, never a durable authorization.
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* - `'rejected'` — an answerer (human or policy) said no.
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* - `'cancelled'` — the question was withdrawn: the prompt was dismissed, or
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* the requesting execution aborted while the question was pending.
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* - `'unavailable'` — nobody composed could answer (no listener, none that
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* recognizes the agent, or an answerer failed). Callers MUST fail closed on
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* it, exactly like `'rejected'` — the two differ only for audit and wording.
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*/
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export type ApprovalOutcome = 'allowed-once' | 'rejected' | 'cancelled' | 'unavailable'
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/** Every {@link ApprovalOutcome}, for runtime normalization of answerer returns. */
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const OUTCOMES: readonly ApprovalOutcome[] = ['allowed-once', 'rejected', 'cancelled', 'unavailable']
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/**
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* A session's approval policy — what happens to an {@link ApprovalService}
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* ask BEFORE any interactive answerer sees it:
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*
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* - `'ask'` (the default) — delegate to the composed answerers; with none
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* composed the chain falls through to the fail-closed `'unavailable'`
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* (exactly today's behavior).
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* - `'never'` — never prompt anyone: every ask resolves `'rejected'`
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* deterministically. The strict headless stance (CI, unattended runs) and
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* the only policy value stated in the system prompt — unlike `'ask'`, its
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* outcome is knowable without asking, so stating it cannot overclaim.
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*/
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export type ApprovalPolicy = 'ask' | 'never'
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/** Every {@link ApprovalPolicy}, for option advertisement and runtime validation of untrusted policy strings. */
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export const APPROVAL_POLICIES: readonly ApprovalPolicy[] = ['ask', 'never']
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/**
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* The prompt sentence stating a `'never'` policy — visibility for the one
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* deterministic policy (see {@link ApprovalPolicy}). Narrator persistence
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* does NOT parse this prose: deployments can quote it in a persona or another
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* section, so the section also emits a source-owned marker.
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*/
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const NEVER_SENTENCE = 'Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).'
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/** Source-owned prompt markers used to reconstruct the policy in a logged header. */
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const POLICY_MARKERS = {
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ask: '<!-- dsh-user-approval-policy:ask -->',
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never: '<!-- dsh-user-approval-policy:never -->',
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} as const satisfies Record<ApprovalPolicy, string>
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/**
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* Read the policy fact emitted by this service from a logged system prompt.
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* The section is ordered after deployment persona text, and the last marker
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* wins so a persona quoting an earlier marker cannot shadow the service's own
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* contribution. Ordinary policy prose is deliberately ignored.
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*/
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function toldApprovalPolicy(system: string | undefined): ApprovalPolicy | undefined {
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if (system === undefined) return undefined
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const ask = system.lastIndexOf(POLICY_MARKERS.ask)
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const never = system.lastIndexOf(POLICY_MARKERS.never)
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if (ask < 0 && never < 0) return undefined
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return never > ask ? 'never' : 'ask'
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}
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/**
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* The session's approval-policy override: the last `approval/policy` event in
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* the log, or undefined when the session never switched (callers apply the
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* plugin'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 policy of the last switch event, or undefined without one.
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*/
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export function effectiveApprovalPolicy(events: readonly SessionEvent[]): ApprovalPolicy | 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 === 'approval/policy') return event.data.policy
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}
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return undefined
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}
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/**
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* Whether the log currently sits inside an open turn (a `turn/start` not yet
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* closed by a `turn/end`) — the {@link ApprovalService.request} precondition.
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* The audit pair must be turn-enclosed: the turn is the durable log's
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* commit/replay boundary, so a bare event appended between turns is
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* indistinguishable from a crash tail and silently dropped on reload.
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*/
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function hasOpenTurn(events: readonly SessionEvent[]): boolean {
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for (let index = events.length - 1; index >= 0; index -= 1) {
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const type = (events[index] as SessionEvent).type
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if (type === 'turn/start') return true
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if (type === 'turn/end') return false
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}
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return false
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}
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/**
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* THE write path for a session's approval-policy override: appends exactly
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* one `approval/policy` event — the switch IS its event; nothing mutates
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* policy state out of band. Takes effect on the session's next ask 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 policy - the policy every subsequent ask for this session resolves
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* under (until the next switch).
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*/
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export function setApprovalPolicy(session: Session, policy: ApprovalPolicy): void {
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session.append('approval/policy', { policy })
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}
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/**
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* One concrete permission question. Identifies the action precisely enough
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* for an answerer to present it and for the audit events to reconstruct what
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* was asked — it deliberately does NOT carry tool arguments: a UI answerer
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* attaches the prompt to the already-streamed tool call via `callId` instead
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* of re-rendering the call.
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*/
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export interface ApprovalRequest {
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/**
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* The agent on whose behalf the question is asked. Routes the question (a
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* UI answerer only answers for agents it owns) and receives the audit
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* events on its session log.
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*/
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agent: Agent
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/** The tool the question is about (presentation and audit). */
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toolName: string
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/**
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* The exact tool call being decided, when the asker has one — lets a UI
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* attach the prompt to the tool call it already streamed.
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*/
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callId?: CallId
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/** The asker's human-readable explanation of WHY it is asking. */
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reason?: string
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/**
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* Aborting withdraws the question: the request settles `'cancelled'`
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* immediately and a late answer from a still-pending answerer is discarded.
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*/
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signal?: AbortSignal
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}
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/** Plugin config. All optional — `static Config` supplies the defaults. */
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export interface Config {
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/**
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* The deployment's default {@link ApprovalPolicy} for sessions without an
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* `approval/policy` override — `'ask'` delegates to the composed answerers
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* (fail-closed with none); `'never'` auto-rejects every ask without
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* prompting (the deterministic CI/unattended stance).
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*/
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policy?: ApprovalPolicy
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}
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/**
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* The `ctx.approval` service: dispatches {@link ApprovalRequest}s to the
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* `approval/request` waterfall and audits every ask/outcome pair to the
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* requesting agent's session log. Stateless between requests — grants are
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* returned to the caller, never stored here.
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*
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* Owns the policy tier too (`effective = fold(the session's 'approval/policy'
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* events) ?? config.policy`): `request()` resolves `'never'` to `'rejected'`
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* before dispatching any interactive answerer, a per-agent prompt section
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* states a `'never'` policy (and only that one in prose — an `'ask'` promise
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||||
* could overclaim an answerer that headless compositions do not have), and an
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||||
* `agent/pre-step` narrator injects at most one coalesced notice when a
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* session's effective policy moved past what the model was last told.
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*/
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export class ApprovalService extends Service {
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static Config: z<Config> = z.object({
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||||
policy: z.union(['ask', 'never'] as const).default('ask'),
|
||||
})
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||||
|
||||
constructor(ctx: Context, public config: Config) {
|
||||
super(ctx, 'approval')
|
||||
|
||||
const effective = (agent: Agent): ApprovalPolicy => this.effectivePolicy(agent)
|
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|
||||
// Visibility layer 1, scoped on the prompt registry so headless
|
||||
// compositions mount the seam without it: state the one deterministic
|
||||
// policy per session. 'ask' renders only a source-owned state marker —
|
||||
// stating "you will be asked" would overclaim in a composition with no
|
||||
// answerer. The marker, not deployment-controlled prose, is what the
|
||||
// restart narrator reads back from the logged request header.
|
||||
ctx.inject(['systemPrompt'], (scope: Context) => {
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scope.systemPrompt.section({
|
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name: 'approval:policy',
|
||||
order: 115,
|
||||
text: (context) => {
|
||||
const agent = context.agent
|
||||
// A bare assemble() (tests, diagnostics) has no session to state.
|
||||
if (agent === undefined) return ''
|
||||
const policy = effective(agent)
|
||||
return policy === 'never' ? `${NEVER_SENTENCE}\n${POLICY_MARKERS.never}` : POLICY_MARKERS.ask
|
||||
},
|
||||
})
|
||||
})
|
||||
|
||||
// Visibility layer 2: the boundary narrator. pre-step runs after prompt
|
||||
// assembly but before the request history is derived, so the notice is
|
||||
// seen by THIS step's request: idle-time flip-flops coalesce at the
|
||||
// turn's first step (net-zero → nothing), and a mid-turn switch is
|
||||
// narrated no later than the next step. What each session was last told
|
||||
// is in-memory with a log-derived fallback (the folded header's system
|
||||
// text), so restarts lose nothing. Attribution is positional: an
|
||||
// override event after the log's last `request/header*` was a runtime
|
||||
// switch by the user; otherwise the configured default moved under the
|
||||
// session (operator/config).
|
||||
const narrated = new WeakMap<Agent['session'], ApprovalPolicy>()
|
||||
ctx.on('agent/pre-step', (agent) => {
|
||||
const session = agent.session
|
||||
const events = session.events
|
||||
let overrideIndex = -1
|
||||
let headerIndex = -1
|
||||
for (let index = events.length - 1; index >= 0 && (overrideIndex < 0 || headerIndex < 0); index -= 1) {
|
||||
const event = events[index] as (typeof events)[number]
|
||||
if (overrideIndex < 0 && event.type === 'approval/policy') {
|
||||
overrideIndex = index
|
||||
} else if (headerIndex < 0 && (event.type === 'request/header' || event.type === 'request/header-delta')) {
|
||||
headerIndex = index
|
||||
}
|
||||
}
|
||||
// Same fold effectivePolicy performs — override is scanned here anyway
|
||||
// for POSITIONAL attribution; the default lives once, in the method.
|
||||
const current = this.effectivePolicy(agent)
|
||||
const header = session.requestHeader()
|
||||
const told = narrated.get(session) ?? toldApprovalPolicy(header?.system)
|
||||
narrated.set(session, current)
|
||||
// Cold start (nothing ever told) narrates nothing — the section about
|
||||
// to go out states the truth, and there is no delta to explain.
|
||||
if (told === undefined || told === current) return
|
||||
const cause = overrideIndex > headerIndex ? 'changed by the user' : 'changed by the operator/config'
|
||||
agent.inject(
|
||||
[{ type: 'text', text: `The approval policy changed from "${told}" to "${current}" (${cause}).` }],
|
||||
{ source: { kind: 'plugin', plugin: 'user-approval' } },
|
||||
)
|
||||
})
|
||||
}
|
||||
|
||||
/**
|
||||
* Ask the composed answerers to decide one request. Requires an open turn
|
||||
* on the requesting agent's session — the audit pair below is turn-enclosed
|
||||
* by contract (the turn is the log's commit/replay boundary; an idle append
|
||||
* would be dropped as crash tail on reload) — and throws before appending
|
||||
* anything when called idle; asking outside a turn is a deferred design.
|
||||
* Within that precondition it always resolves to an outcome, never rejects:
|
||||
* an aborted signal yields `'cancelled'`, a missing or throwing answerer
|
||||
* yields `'unavailable'` (fail closed), and a rogue non-vocabulary return
|
||||
* value is normalized to `'unavailable'`. Appends the
|
||||
* `approval/asked`/`approval/decided` audit pair (log-only) around the
|
||||
* decision regardless of outcome.
|
||||
* @param req - the pending decision (agent, tool identity, reason, signal).
|
||||
* @returns the closed outcome; `'allowed-once'` is the only grant.
|
||||
*/
|
||||
async request(req: ApprovalRequest): Promise<ApprovalOutcome> {
|
||||
if (!hasOpenTurn(req.agent.session.events)) {
|
||||
throw new Error(
|
||||
'approval.request() outside an open turn: the approval/asked + approval/decided audit pair '
|
||||
+ 'must be turn-enclosed (a bare event between turns is crash-tail garbage on reload). '
|
||||
+ 'Ask from inside the turn that needs the decision.',
|
||||
)
|
||||
}
|
||||
const id = ApprovalRequestId(randomUUID())
|
||||
req.agent.session.append('approval/asked', {
|
||||
id,
|
||||
toolName: req.toolName,
|
||||
...req.callId !== undefined ? { callId: req.callId } : {},
|
||||
...req.reason !== undefined ? { reason: req.reason } : {},
|
||||
})
|
||||
const outcome = await this.decide(req)
|
||||
req.agent.session.append('approval/decided', { id, outcome })
|
||||
return outcome
|
||||
}
|
||||
|
||||
/**
|
||||
* The session's effective policy: its own `approval/policy` fold, else the
|
||||
* configured default (the schema already defaulted an omitted policy to
|
||||
* `'ask'`; the `??` only narrows the optional-input TYPE).
|
||||
* @param agent - the agent whose session's policy applies.
|
||||
* @returns the policy every ask for this agent resolves under right now.
|
||||
*/
|
||||
private effectivePolicy(agent: Agent): ApprovalPolicy {
|
||||
return effectiveApprovalPolicy(agent.session.events) ?? this.config.policy ?? 'ask'
|
||||
}
|
||||
|
||||
/** Dispatch the waterfall, contained and raced against `req.signal`. */
|
||||
private async decide(req: ApprovalRequest): Promise<ApprovalOutcome> {
|
||||
if (req.signal?.aborted) return 'cancelled'
|
||||
// The 'never' policy is decided HERE, before any dispatch: a listener
|
||||
// registered with `prepend: true` after this service mounts would sit
|
||||
// ahead of any gate LISTENER, so a listener-shaped gate cannot keep the
|
||||
// documented promise that 'never' rejects deterministically regardless
|
||||
// of registration order — only the service's own request path can.
|
||||
if (this.effectivePolicy(req.agent) === 'never') return 'rejected'
|
||||
// Enter the promise chain BEFORE dispatching: a listener that throws
|
||||
// SYNCHRONOUSLY (before its first await) must land in the same rejection
|
||||
// path as an async one — `Promise.resolve(call())` would let it escape
|
||||
// the containment into the caller.
|
||||
const answer: Promise<ApprovalOutcome> = Promise.resolve().then(
|
||||
() => this.ctx.waterfall(
|
||||
scopeTarget(this, req.agent), 'approval/request', req,
|
||||
() => Promise.resolve<ApprovalOutcome>('unavailable'),
|
||||
),
|
||||
).then(
|
||||
// Normalize a rogue (non-vocabulary) answerer return to the fail-closed
|
||||
// outcome instead of leaking it into callers' closed-union switches.
|
||||
outcome => OUTCOMES.includes(outcome) ? outcome : 'unavailable',
|
||||
// A throwing answerer must fail the QUESTION closed, not the caller's
|
||||
// tool call open — the seam contains its callbacks.
|
||||
() => 'unavailable',
|
||||
)
|
||||
const signal = req.signal
|
||||
if (signal === undefined) return answer
|
||||
return await new Promise<ApprovalOutcome>((resolve) => {
|
||||
const onAbort = () => { resolve('cancelled') }
|
||||
signal.addEventListener('abort', onAbort, { once: true })
|
||||
void answer.then((outcome) => {
|
||||
signal.removeEventListener('abort', onAbort)
|
||||
// After an abort won the race this resolve is a settled-promise no-op:
|
||||
// the late answer is discarded by construction.
|
||||
resolve(outcome)
|
||||
})
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
export default ApprovalService
|
||||
Reference in New Issue
Block a user