deepseek-harness/packages/support

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/	Runtime event-contract assertions for development diagnostics	(listens on session/*, agent/*)
loader-smoke/	Shared real-Loader subprocess harness for keyless example smokes	(library — imported by example e2e suites)
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 is development support but has no environment guard: it runs wherever registered, and the default dsh-agent-core bundle mounts it unconditionally. 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, while loader-smoke owns the parallel stdio/Loader process boundary used by keyless example e2e suites. 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.