asdf

Squash the current repository state back into one baseline commit while
preserving the README reframing and repository contents.

Constraint: User explicitly requested a single squashed commit with subject "asdf"
Confidence: high
Scope-risk: broad
Reversibility: clean
Directive: This commit intentionally rewrites published history; coordinate before future force-pushes
Tested: git status clean; local history rewritten to one commit; force-pushed main to origin and instructkr
Not-tested: Fresh clone verification after push

src/utils/findExecutable.ts

@@ -0,0 +1,17 @@
+import { whichSync } from './which.js'
+
+/**
+ * Find an executable by searching PATH, similar to `which`.
+ * Replaces spawn-rx's findActualExecutable to avoid pulling in rxjs (~313 KB).
+ *
+ * Returns { cmd, args } to match the spawn-rx API shape.
+ * `cmd` is the resolved path if found, or the original name if not.
+ * `args` is always the pass-through of the input args.
+ */
+export function findExecutable(
+  exe: string,
+  args: string[],
+): { cmd: string; args: string[] } {
+  const resolved = whichSync(exe)
+  return { cmd: resolved ?? exe, args }
+}