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Waleed
a512a263c8
A bare `tsc` was silently resolving to the JavaScript TypeScript 6 compiler. `apps/sim` depends on `@typescript/typescript6` for its runtime TypeScript AST API, which pulls in `@typescript/old` (an alias of `typescript@6`) declaring its own `tsc` bin. Package managers pick bin winners by lexical sort rather than dependency depth, so `@typescript/old` beat `typescript` and won `node_modules/.bin/tsc`. Identical diagnostics, ~10x slower, and it fails silently: the check still passes, it just burns minutes. Both compilers check an identical 11,066-source- file program with byte-identical diagnostics; the only `--listFiles` delta is lib relocation plus TS7 deduping nested .d.ts copies. The `@typescript/native` alias sorts ahead of `@typescript/old` and reclaims the bin. This is the TypeScript team's own recommendation on typescript-go#4567 -- the original blog example was wrong. Every `type-check` script is unchanged; `bunx tsc` and ad-hoc invocations are fixed too. apps/sim cold 83s -> 8.5s; all 23 workspaces 96s -> 9.4s. The alias is invisible-load-bearing: nothing imports it, so removing it looks like dead-dependency cleanup and costs 10x with no visible failure. check:native-typecheck asserts a bare `tsc` reports 7.x and fails CI otherwise. Also drops NODE_OPTIONS=--max-old-space-size=8192 from apps/sim's type-check -- it only ever mattered for the JS compiler's V8 heap.