#226 · zig-utils/zig-js

Goal

Implement the shared pinned Home/Bun JSON serialization pair:

Parent: #134 Profile umbrella: #140 Home profile: #163 Bun profile: #164

The normal export passes the unsigned indentation request through JSON.stringify semantics, including the ten-space clamp and exact pretty-print layout.
The fast export uses an undefined space value, producing the exact compact result without changing language semantics.
Both paths preserve toJSON, property enumeration order, getters, proxies, omission/null rules, BigInt/cycle errors, Unicode/lone-surrogate escaping, and selected-realm behavior.
A top-level non-serializable value returns an empty BunString without inventing an exception.
Successful results own exact Latin-1 or UTF-16 BunString storage with correct ref/deref lifetime.
Same-VM siblings, foreign values, invalid encodings, abrupt completion, output initialization, and first-pending-exception behavior are deterministic.
The combined private ABI fixture links and exercises both exports.
Home/Bun inventories, README/docs, and parent trackers publish the regenerated counts and green evidence.
Focused tests and the relevant batched ABI audits pass before closure.

Bun revision 4982b91e, src/jsc/bindings/bindings.cpp, functions JSC__JSValue__jsonStringify and JSC__JSValue__jsonStringifyFast.

Code: d345fc7b — normal indent-aware and undefined-space fast serialization with exact owned BunString output and boundary exception handling.
Documentation: 454782f0 — README, ABI, API, and Home integration evidence/counts.
Focused test: 3/3 passed, 0 skipped, 0 failed, 0 leaked.
Batched ABI gate: Home 212/431 implemented (219 pending), Bun 206/421 implemented (215 pending), public C 117/117 plus 216 private/support exports.
Consumer fixture: 211/211 symbols linked and the runtime matrix passed.
Benchmark report remains the isolated 1,540-sample artifact at 36a617b3; this ABI-only slice did not regenerate performance scores.