fix(client): type ACL GETUSER flags as RESP3 SET

[abhijeet117]

Summary

ACL GETUSER declares flags as an array, but Redis emits the flags element with setDeferredSetLen in acl.c, so RESP3 clients receive a SET on the wire and get a runtime Set typed as string[]. Sibling commands already model this shape with SetReply (FUNCTION LIST, CLIENT TRACKINGINFO). flags is now SetReply: RESP2 replies stay arrays, RESP3 replies type as Set.

Testing

Compile-time regression test resolves the reply under a SET type mapping and asserts flags is Set; it fails on master with TS2740 and passes after the fix. Verified against acl.c source; parser spec, type tests, build and lint run locally; Docker-backed integration tests run in CI.

Checklist

• bug reproduced before fix
• root cause identified
• bug fixed
• tests passed

---

Note

Low Risk
Type-only reply mapping change with no runtime parser or command behavior updates. Possible TypeScript breakage for callers that treated RESP3 flags as an array.

Overview
Corrects ACL GETUSER reply types so flags is a RESP3 set, matching what Redis actually sends (setDeferredSetLen in acl.c). Previously it was typed as an array, so RESP3 clients got a runtime Set while TypeScript claimed string[].

flags is now SetReply<BlobStringReply> (same pattern as FUNCTION LIST and CLIENT TRACKINGINFO). RESP2 replies stay arrays. A compile-time types test asserts flags is Set<string> under a SET type mapping.

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Keep RESP2 flags typed as an array

When a RESP2 client uses .withTypeMapping({ [RESP_TYPES.SET]: Set }), Resp2Reply<AclUser> preserves this nested value's new SET tag, so aclGetUser() now declares flags as Set<string>. The RESP2 server still sends an ARRAY and the decoder returns an array—the existing integration assertion confirms this—so consumers can compile Set-only operations that fail at runtime. Give the RESP2 transform an explicitly array-typed flags result rather than sharing the RESP3 marker.

AGENTS.md reference: AGENTS.md:L49-L51

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[PavelPashov]

@abhijeet117 Thanks for the PR. We’ll review it when we have capacity.