echidna: Client.res AffineScript-TEA port — missing primitives (Http/Promise/Json/Dict) [meta]

[hyperpolymath]

Context

Porting src/rescript/src/api/Client.res to AffineScript-TEA (migration roadmap commit b942b9d, [migration-roadmap.rescript-to-affinescript]) is gated on four stdlib primitives that AffineScript does not yet expose. Each was filed separately; this parent formalises the cohort.

Blocker

Typed surfaces wait on hyperpolymath/affinescript#228 (module-qualified type paths).

Children

• AffineScript primitive needed for Client.res: Http.fetch #61 — Http.fetch (Http.get / Http.post / Response accessors)
• AffineScript primitive needed for Client.res: Promise / Async #62 — Promise / Async (Async[T], bind, catch)
• AffineScript primitive needed for Client.res: Json (encode / decode) #63 — Json (encode / decode, codec-style acceptable)
• AffineScript primitive needed for Client.res: Dict (mutable key-value map) #64 — Dict (mutable or affine-immutable key-value map)

Source

Split from a single porting context across four separate primitive-need issues. Formalising as a parent so the cohort can be tracked together and closed in lockstep with the Client.res port (migration step 1 of 10).

Downstream

All UI components that call Client.* functions (Store.res + 6 UI components) are blocked behind this cohort.

[hyperpolymath]

Status update on this cohort (2026-05-30, post-#447 merge):

Resolution

All four child issues closed as already-resolved-upstream:

• AffineScript primitive needed for Client.res: Http.fetch #61 — Http.fetch / get / post shipped in affinescript/stdlib/Http.affine (253 LOC, lowered to globalThis.fetch via Deno-ESM; WasmGC via CPS transform per ADR-013)
• AffineScript primitive needed for Client.res: Promise / Async #62 — Async is a reserved built-in effect; Promise.then equivalent via Http.thenableThen + CPS lowering
• AffineScript primitive needed for Client.res: Json (encode / decode) #63 — affinescript/stdlib/json.affine (335 LOC, v0.3) — full encode/decode + Zig-FFI parse + stringify
• AffineScript primitive needed for Client.res: Dict (mutable key-value map) #64 — affinescript/stdlib/dict.affine (122 LOC) — association-list assoc map; composes with AffineScript primitive needed for Client.res: Json (encode / decode) #63's decoded objects

Upstream blocker (#228) status

hyperpolymath/affinescript#447 (module-qualified type/effect path resolution, ADR-014) merged 2026-05-30T12:51:12Z.

Residual: lowercase stdlib module names (json, dict, option, prelude, …) still cannot be qualifier-referenced — head requires upper_ident. Workaround for the Client.res port: use use json::{Json, ...} style imports rather than json::Json qualified paths.

Remaining work

Client.res port itself is no longer blocked on primitives. The 6 downstream UI components (Store.res + 5 others) can also unblock once Client lands.

Suggested close-this-meta when the port lands as a PR.