toolOrchestration.ts used `export { getMaxToolUseConcurrency } from
'./toolConcurrency.js'` (a re-export) but then called the function
directly in runToolsConcurrently(). A re-export does not bring the name
into the module's own scope, causing a ReferenceError at runtime —
visible as "getMaxToolUseConcurrency is not defined" in --print mode.
TypeScript also flagged this as TS2304 on main.
Fix: replace the re-export with an explicit import + a separate export
statement so the name is both locally callable and publicly exported.
ripgrep.ts fell through to the vendor binary path on non-bundled (npm)
installs where the vendor/ directory is not shipped alongside dist/cli.mjs,
producing "spawn .../vendor/ripgrep/x64-linux/rg ENOENT". Fix: check
whether the vendor binary exists before returning the builtin config;
fall back to system rg if it is absent.
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