InputScript gains an optional permissionAnswers queue, consumed FIFO by the harness's requestPermission handler. Each entry selects by option KIND (allow_once, reject_once, …): option ids are agent-issued randoms a committed script cannot know, while kinds are the ACP-stable vocabulary, so the client maps kind → the offered optionId at answer time. An absent or exhausted queue answers cancelled — existing scenarios and goldens are untouched — and a scripted kind the request never offered throws, surfacing as a JSON-RPC error on the permission request: the scenario scripted an impossible click. This is what lets an approval-flow suite (the sandbox composition) drive allow/reject round-trips deterministically from input.json, per the shared-acp-snapshot RFC.
support/ — dev/test/example infrastructure
Packages that exist to serve development, testing, and the examples rather than to ship as product API. They are real workspace packages (typed, tested, under the coverage gate), but they carry lower compatibility expectations: they may change or be removed when the development need behind them does, without the deprecation care a product package would warrant.
| Package | Role | ctx key |
|---|---|---|
acp-snapshot/ |
ACP snapshot suite kit: subprocess scenario harness + golden normalizers + the defineAcpSnapshotSuite factory |
(library — imported by example *.snapshot.ts suites) |
invariants/ |
Dev-mode event-contract invariants + session-log freeze | (listens on session/*, agent/*) |
llm-replay/ |
Record/replay adapter: short-circuits llm/stream from a recorded session JSONL (keyless snapshot tests) |
(listens on llm/stream) |
subagent-mock/ |
Scripted SubagentProvider for deterministic seam/tool tests |
(registers on ctx.subagents) |
invariants runs only in dev mode (contract checks, not runtime behavior). llm-replay backs the demos and the snapshot test tier under the per-file coverage gate. acp-snapshot carries the snapshot tier's harness/normalizer/suite machinery so every example's suite is a scenario table over one shared, gate-covered implementation. subagent-mock exercises the real ctx.subagents load path without a model or child agent. A package graduates OUT of support/ into a product group only when it gains documented product consumers.