diff --git a/studio/backend/tests/test_lemonade_llamacpp_rocm_bins_mock.py b/studio/backend/tests/test_lemonade_llamacpp_rocm_bins_mock.py
index 57bbc84fb0..7c6c514b8f 100644
--- a/studio/backend/tests/test_lemonade_llamacpp_rocm_bins_mock.py
+++ b/studio/backend/tests/test_lemonade_llamacpp_rocm_bins_mock.py
@@ -32,14 +32,19 @@ if resolve_lemonade_rocm_choice is None or _LEMONADE_GFX_FAMILIES is None:
 
 @pytest.fixture(autouse = True)
 def _clear_lemonade_release_cache():
-    """Prevent cross-test pollution of the lemonade release lru_cache when
-    future tests vary the fetch_json mock return value."""
+    """Prevent cross-test pollution of the lemonade release lru_cache and
+    selection-log dedup set when tests vary the fetch_json mock return value."""
     _cache = getattr(_mod, "_fetch_lemonade_release_cached", None)
+    _logged: set | None = getattr(_mod, "_lemonade_selection_logged", None)
     if _cache is not None and hasattr(_cache, "cache_clear"):
         _cache.cache_clear()
+    if _logged is not None:
+        _logged.clear()
     yield
     if _cache is not None and hasattr(_cache, "cache_clear"):
         _cache.cache_clear()
+    if _logged is not None:
+        _logged.clear()
 
 
 _STUB_TAG = "b1262"
diff --git a/studio/install_llama_prebuilt.py b/studio/install_llama_prebuilt.py
index bd8c90dc9c..bed7a27a63 100644
--- a/studio/install_llama_prebuilt.py
+++ b/studio/install_llama_prebuilt.py
@@ -460,8 +460,14 @@ def is_busy_lock_error(exc: BaseException) -> bool:
     return False
 
 
+# Status logs default to stderr so resolver modes keep stdout machine-readable
+# (setup.sh json.load()s the whole stdout). main() flips this for the install
+# path, where PowerShell otherwise renders stderr as NativeCommandError noise.
+_LOG_TO_STDOUT = False
+
+
 def log(message: str) -> None:
-    print(f"[llama-prebuilt] {message}", file = sys.stderr)
+    print(f"[llama-prebuilt] {message}", file = sys.stdout if _LOG_TO_STDOUT else sys.stderr)
 
 
 def log_lines(lines: Iterable[str]) -> None:
@@ -3928,6 +3934,12 @@ def _is_trusted_github_release_url(url: str, expected_repo: str) -> bool:
     return False
 
 
+# (gfx_target, asset_name) pairs already logged. resolve_lemonade_rocm_choice()
+# runs twice per install (direct planner + resolve_upstream_asset_choice), so
+# this stops its selection banner and hash-manifest NOTE printing twice.
+_lemonade_selection_logged: "set[tuple[str, str]]" = set()
+
+
 @functools.lru_cache(maxsize = 8)
 def _fetch_lemonade_release_cached(api_url: str, llama_tag: str) -> "dict | None":
     """Cached wrapper around fetch_json for lemonade release lookups.
@@ -4034,18 +4046,22 @@ def resolve_lemonade_rocm_choice(
     # Note: lemonade tags Linux assets with "ubuntu" but the binary is a
     # generic glibc build that runs on any distro (Arch, Fedora, ...), so
     # this attempt is selected for all Linux ROCm hosts, not just Ubuntu.
-    log(
-        f"AMD GPU {host.rocm_gfx_target!r} ({gfx_family}) -- "
-        f"trying lemonade-sdk ROCm prebuilt {asset_name} "
-        f"(works on any glibc Linux, not just Ubuntu)"
-    )
-    log(
-        f"NOTE: lemonade-sdk/llamacpp-rocm releases are not covered by the "
-        f"Unsloth approved-hash manifest; download integrity relies on "
-        f"functional validation (llama-bench / llama-server smoke tests) "
-        f"after extraction. Set UNSLOTH_DISABLE_LEMONADE_ROCM=1 to skip "
-        f"lemonade and fall back to the upstream HIP build path."
-    )
+    # Log once per (gfx_target, asset); see _lemonade_selection_logged.
+    log_key = (host.rocm_gfx_target, asset_name)
+    if log_key not in _lemonade_selection_logged:
+        _lemonade_selection_logged.add(log_key)
+        log(
+            f"AMD GPU {host.rocm_gfx_target!r} ({gfx_family}) -- "
+            f"trying lemonade-sdk ROCm prebuilt {asset_name} "
+            f"(works on any glibc Linux, not just Ubuntu)"
+        )
+        log(
+            f"NOTE: lemonade-sdk/llamacpp-rocm releases are not covered by the "
+            f"Unsloth approved-hash manifest; download integrity relies on "
+            f"functional validation (llama-bench / llama-server smoke tests) "
+            f"after extraction. Set UNSLOTH_DISABLE_LEMONADE_ROCM=1 to skip "
+            f"lemonade and fall back to the upstream HIP build path."
+        )
     return AssetChoice(
         repo = LEMONADE_ROCM_REPO,
         tag = release_tag,
@@ -6963,6 +6979,9 @@ def main() -> int:
         raise SystemExit(
             "install_llama_prebuilt.py: --install-dir is required unless --resolve-llama-tag, --resolve-install-tag, or --resolve-source-build is used"
         )
+    # Install path only: route status logs to stdout (see _LOG_TO_STDOUT note).
+    global _LOG_TO_STDOUT
+    _LOG_TO_STDOUT = True
     install_prebuilt(
         install_dir = Path(args.install_dir).expanduser().resolve(),
         llama_tag = args.llama_tag,