Hojun-Cho
00d88ff9fc
Phase 0 #8 second α-batch. 7 sites: lib/path/path.ww `join` ×4, lib/shlex/shlex.ww `dupstr`, lib/fmt/fmt.ww `asprintf` tight-copy, lib/os/ostest.ww `test_alloc_free_roundtrip`. Same dup-pilot pattern (4c07ef0,47918d3): `alloc([], N)!` + `buf.len = N;` + `return strings.frombytes(buf);`. Side effects: - path/shlex/fmt: import switches `rt` → `strings` (callers now reference `strings.frombytes`, not `rt.malloc` direct). - ostest.ww: `import rt;` retained — the alloc builtin lowers to `CALL malloc(SB)` which resolves via rt's @symbol("rt_malloc") decl. Other files reach rt transitively via `import strings`; ostest only imports os, so it needs the explicit rt import. - shlex stale comment "avoid strings dep" stripped — strings is now in scope. Verified make test 132/132 + 995_self_rebuild byte-identity. Advances #43.