From 8b0ea9c00d11b11582030dd7418574a494e2e791 Mon Sep 17 00:00:00 2001
From: Alex Zhou <alex.zhou@edge0.ai>
Date: Sat, 10 Oct 2026 17:45:46 +0800
Subject: [PATCH] =?UTF-8?q?windows:=20fix=20issue=20#128=20=E2=80=94=20con?=
 =?UTF-8?q?verter=20path=20robustness,=20ASCII-safe=20output,=20engine=20v?=
 =?UTF-8?q?ersion=20probe,=20dependency=20preflight?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fresh-install validation by @Lexlangel (issue #128) reported four repo-level
issues on Windows 8B; all four are addressed (internal ledger commit f442324):

- cross-check gate base path: verify_against_base() hardcoded
  <repo>/windows/models/... while the app converts into ~/.edge0/models, so the
  GUI Download->Convert path hit FileNotFoundError on end-user machines (a dev
  repo's local models/ masked it). The base GGUF path is now an explicit
  argument; the converter passes its own --out artifact as --base, standalone
  runs derive the conventional <dir>-gguf sibling. Missing base fails with an
  E-BASE-MISSING line pointing at --base.
- Windows console output: every non-ASCII glyph in converter-chain print lines
  (-> ⇒ ✔ × ·) is replaced with ASCII, and the five entry points
  reconfigure(sys.stdout, utf-8/backslashreplace) as a guard. The app pipes the
  converter's stdout, where Python falls back to the ANSI code page — U+2192 in
  the final DONE line raised UnicodeEncodeError after an otherwise successful
  conversion (issue #128 report 4). Codec-level tests: cp1252-strict reproduces
  the crash, pure ASCII always passes, reconfigure rescues.
- engine version probe: failures were cached in a OnceLock<Option>, so one
  early miss (status poll before the engine landed on a fresh install) haunted
  the whole session with "exists but version probe failed". Only successes are
  cached now; doctor uses an always-measure server_version_probe() that
  captures stdout AND stderr (the fork logs its version banner to the log
  stream; the old stdout-only/stderr-null probe could never see it) with a
  tolerant version: line match. tests/doctor.rs adds a late-binary recovery
  case (POSIX shebang stand-in emitting the version line to stderr only;
  Windows side exempted like the existing mklink leg, pending release-machine
  runs).
- dependency preflight: the converter chain is numpy-only and stays so;
  convert_mlx_to_gguf.py now fails with E-DEP guidance when numpy is missing,
  and the gate's gguf fallback import reports E-DEP pip install gguf. Note on
  the PyYAML report: no shipped converter file imports yaml anywhere in this
  repo's history; the error came from the mlx_lm stack that the root README /
  python/pyproject.toml recommend to Windows users without a platform gate —
  tracked separately on the python side.

Verification on this tree: py_compile of all 7 exported tools, repack
--selftest PASS, import closure within stdlib ∪ {numpy, gguf} ∪ same-dir,
zero non-ASCII in print lines. Full cargo check/test and the five make-dist
gates run on the Windows release machine.
---
 windows/app/src-tauri/src/doctor.rs   |  5 +--
 windows/app/src-tauri/src/engine.rs   | 48 +++++++++++++++++----------
 windows/app/src-tauri/tests/doctor.rs | 34 ++++++++++++++++++-
 windows/tools/convert_mlx_to_gguf.py  | 25 ++++++++++----
 windows/tools/lora_mlx_to_gguf.py     | 26 +++++++++++----
 windows/tools/repack_mlx_to_gguf.py   | 12 ++++---
 windows/tools/repack_r3.py            |  4 ++-
 windows/tools/repack_r3_8b.py         |  2 ++
 8 files changed, 117 insertions(+), 39 deletions(-)

diff --git a/windows/app/src-tauri/src/doctor.rs b/windows/app/src-tauri/src/doctor.rs
index 811ff15..8ac2fb5 100644
--- a/windows/app/src-tauri/src/doctor.rs
+++ b/windows/app/src-tauri/src/doctor.rs
@@ -78,10 +78,11 @@ pub fn run(state: &engine::EngineState) -> Value {
         check("memory", "fail", format!("{mem} GB: below the 8b floor"), Some("E-MEM-LOAD"), None)
     });
 
-    // engine binary presence + version probe
+    // engine binary presence + version probe (always-measure: doctor reports live facts,
+    // and a cached negative from before the binary landed must not haunt it — issue #128)
     let exe = paths::bin_dir().join("llama-server.exe");
     checks.push(if exe.exists() {
-        match engine::server_version() {
+        match engine::server_version_probe() {
             Some(v) => check("engine", "pass", v, None, None),
             None => check("engine", "warn", format!("{} exists but version probe failed", exe.display()), None, None),
         }
diff --git a/windows/app/src-tauri/src/engine.rs b/windows/app/src-tauri/src/engine.rs
index ed95452..d08365a 100644
--- a/windows/app/src-tauri/src/engine.rs
+++ b/windows/app/src-tauri/src/engine.rs
@@ -228,24 +228,38 @@ pub fn status(state: &EngineState) -> Value {
     }
 }
 
-/// Engine binary version: the actual `llama-server --version` line, cached in a
-/// OnceLock; the UI shows the measured value and falls back to null rather than guessing.
+/// Engine binary version: the actual `llama-server --version` line.
+/// A *successful* probe is cached for the session; failures are never cached
+/// (issue #128: the old OnceLock<Option> shape let one early miss — e.g. a status
+/// poll before the engine had landed — poison a whole fresh-install session with
+/// "exists but version probe failed"). Capture is stdout+stderr with a tolerant
+/// `version:` line match: the fork logs its banner to the log stream, and the old
+/// stdout-only / stderr-discarded / strict-prefix probe never saw it.
+static VER_CACHE: OnceLock<String> = OnceLock::new();
+
 pub fn server_version() -> Option<String> {
-    static VER: OnceLock<Option<String>> = OnceLock::new();
-    VER.get_or_init(|| {
-        let exe = paths::bin_dir().join("llama-server.exe");
-        let mut cmd = Command::new(&exe);
-        crate::no_window(&mut cmd)
-            .arg("--version")
-            .current_dir(paths::bin_dir())
-            .stdout(Stdio::piped())
-            .stderr(Stdio::null());
-        cmd.spawn()
-            .and_then(|c| c.wait_with_output())
-            .ok()
-            .map(|o| String::from_utf8_lossy(&o.stdout).lines().find(|l| l.starts_with("version:")).map(|l| l.trim().to_string()).unwrap_or_default())
-            .filter(|s| !s.is_empty())
-    }).clone()
+    VER_CACHE.get().cloned().or_else(server_version_probe)
+}
+
+/// Always-measure probe (doctor uses this: a manual check must read live facts,
+/// never a stale negative). Only a success writes the cache.
+pub fn server_version_probe() -> Option<String> {
+    let exe = paths::bin_dir().join("llama-server.exe");
+    let mut cmd = Command::new(&exe);
+    crate::no_window(&mut cmd)
+        .arg("--version")
+        .current_dir(paths::bin_dir())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped());
+    let out = cmd.spawn().and_then(|c| c.wait_with_output()).ok()?;
+    let text = format!("{}\n{}", String::from_utf8_lossy(&out.stdout), String::from_utf8_lossy(&out.stderr));
+    let line = text.lines().map(str::trim_start)
+        .find(|l| l.starts_with("version:"))
+        .or_else(|| text.lines().find(|l| l.contains("version:")))?
+        .trim().to_string();
+    if line.is_empty() { return None; }
+    let _ = VER_CACHE.set(line.clone());
+    Some(line)
 }
 
 /// Read the POOL2 init telemetry line from a log (used by doctor; a missing line =
diff --git a/windows/app/src-tauri/tests/doctor.rs b/windows/app/src-tauri/tests/doctor.rs
index dcfc6d5..d4ac83b 100644
--- a/windows/app/src-tauri/tests/doctor.rs
+++ b/windows/app/src-tauri/tests/doctor.rs
@@ -1,6 +1,6 @@
 // tests/doctor.rs — doctor check contract + model_delete protection lines (isolated home;
 // tests serialized via a process lock to avoid env races).
-use edge0_app_lib::{doctor, paths};
+use edge0_app_lib::{doctor, engine, paths};
 use serde_json::json;
 use std::sync::Once;
 
@@ -45,6 +45,38 @@ fn doctor_contract_shape() {
     assert_eq!(find("model-35b").unwrap()["verdict"], "warn", "not installed = warn, not fail");
 }
 
+#[test]
+fn engine_probe_recovers_when_binary_lands_late() {
+    // Issue #128 fresh-install sequence: an early failed probe must NOT poison the
+    // session cache, and a version line written to STDERR (fork logging behavior)
+    // must still be captured. Serialized on LOCK; own bin dir; env restored.
+    let _g = LOCK.lock().unwrap_or_else(|e| e.into_inner());
+    let h = iso_home();
+    let fake = h.join("bin-late");
+    std::fs::create_dir_all(&fake).unwrap();
+    std::env::set_var("EDGE0_BIN_DIR", &fake);
+    // leg 1: exe absent ⇒ probe fails, nothing may be cached
+    assert!(engine::server_version_probe().is_none(), "early probe (no binary) must fail cleanly");
+    // leg 2: binary lands afterwards; emits its version line to stderr only.
+    // POSIX shebang stand-in — not spawnable on Windows, so the body is unix-gated
+    // (same exemption style as the mklink leg above; Windows coverage via manual runs).
+    #[cfg(unix)]
+    {
+        use std::os::unix::fs::PermissionsExt;
+        let exe = fake.join("llama-server.exe");
+        std::fs::write(&exe, "#!/bin/sh\necho 'load_backend: cpu' 1>&2\necho 'version: 0.0.0-itest (build 1, commit deadbeef)' 1>&2\n").unwrap();
+        std::fs::set_permissions(&exe, std::fs::Permissions::from_mode(0o755)).unwrap();
+        let v = engine::server_version_probe().expect("late binary must probe OK (stderr capture)");
+        assert!(v.contains("0.0.0-itest"), "{v}");
+        // leg 3: doctor surfaces the recovered value as engine=pass
+        let r = doctor::run(&std::sync::Mutex::new(None));
+        let eng = r["checks"].as_array().unwrap().iter()
+            .find(|c| c["id"] == "engine").cloned().unwrap();
+        assert_eq!(eng["verdict"], "pass", "{:?}", eng["detail"]);
+    }
+    std::env::set_var("EDGE0_BIN_DIR", &h); // restore the E-ENGINE-MISSING anchor
+}
+
 #[test]
 fn delete_protection_and_idempotent() {
     let _g = LOCK.lock().unwrap_or_else(|e| e.into_inner());
diff --git a/windows/tools/convert_mlx_to_gguf.py b/windows/tools/convert_mlx_to_gguf.py
index 94e7041..32706a4 100644
--- a/windows/tools/convert_mlx_to_gguf.py
+++ b/windows/tools/convert_mlx_to_gguf.py
@@ -22,6 +22,18 @@
 """
 import argparse, hashlib, json, os, re, subprocess, sys, time
 
+# Dependency preflight + stdout hardening (issue #128): fail with a clear E-DEP line
+# instead of a bare ModuleNotFoundError traceback, and force UTF-8 on stdout so the
+# DONE/progress lines never crash under a redirected/ANSI-codepage stdout
+# (the app pipes us; cp1252-family consoles used to end a *successful* conversion in
+# a UnicodeEncodeError on the final line).
+try:
+    import numpy  # noqa: F401  (the whole chain needs it; report the miss here, with guidance)
+except ImportError:
+    sys.exit("E-DEP: the on-device converter needs python 3.10+ with numpy; fix: pip install numpy")
+if hasattr(sys.stdout, "reconfigure"):
+    sys.stdout.reconfigure(encoding="utf-8", errors="backslashreplace")
+
 TOOLS = os.path.dirname(os.path.abspath(__file__))
 CONVERTER_REV = subprocess.run(["git", "-C", os.path.dirname(TOOLS), "rev-parse", "--short", "HEAD"],
                                capture_output=True, text=True).stdout.strip() or "unknown"
@@ -97,8 +109,6 @@ def main():
     m = re.match(r"edge0[-_](35b|8b)", stem)
     assert m, f"cannot detect tier from directory name: {stem}"
     tier = m.group(1)
-    if a.out and os.path.normpath(a.out) != os.path.normpath(d + "-gguf"):
-        print("WARNING: --out deviates from the <dir>-gguf convention ⇒ the lora cross-check gate still reads the base from the conventional path (use the default layout on-device)", flush=True)
     os.makedirs(out, exist_ok=True)
     log = open(os.path.join(out, "convert.log"), "ab")
     arts = {"gguf": os.path.join(out, f"edge0-{tier}.gguf"),
@@ -112,7 +122,7 @@ def main():
             old = json.load(open(manifest_p, encoding="utf8"))
             ok = all(os.path.isfile(p) and sha256(p) == old["artifacts"][k] for k, p in arts.items())
             if ok:
-                print("manifest hit and all artifact shas match ⇒ already converted, skipping (idempotent).", flush=True)
+                print("manifest hit and all artifact shas match => already converted, skipping (idempotent).", flush=True)
                 return 0
         except Exception:
             pass
@@ -137,7 +147,10 @@ def main():
                  "r3-8b", log)
         n_min = 500
     # ---- step 2: adapter ----
-    run_step([sys.executable, os.path.join(TOOLS, "lora_mlx_to_gguf.py"), "--dir", d], "lora", log)
+    # --base pins the cross-check gate to the base GGUF THIS run produced (issue #128:
+    # the gate used to hardcode <repo>/windows/models/... and missed the app's ~/.edge0 layout).
+    run_step([sys.executable, os.path.join(TOOLS, "lora_mlx_to_gguf.py"), "--dir", d,
+              "--base", arts["gguf"]], "lora", log)
     assert os.path.isfile(src_lora), f"adapter not produced: {src_lora}"
     if os.path.abspath(src_lora) != os.path.abspath(arts["lora"]):
         import shutil; shutil.copyfile(src_lora, arts["lora"])
@@ -163,10 +176,10 @@ def main():
         det = {k: (k in ref_base and ref_base[k][1] == man["artifacts"][k]) for k in arts}
         man["determinism_vs"] = {"baselines": {k: ref_base[k][0] for k in ref_base}, **det}
         assert all(det.get(k) for k in arts), f"determinism mismatch (artifact sha differs from baseline): {det}"
-        print(f"[determinism] vs baselines: ALL MATCH ✔", flush=True)
+        print(f"[determinism] vs baselines: ALL MATCH OK", flush=True)
     json.dump(man, open(manifest_p, "w", encoding="utf8"), ensure_ascii=False, indent=1)
     print(f"DONE {tier}: gguf={man['sizes']['gguf']/2**30:.2f}GiB lora={man['sizes']['lora']/2**20:.1f}MiB "
-          f"took {man['elapsed_s']}s → {manifest_p}", flush=True)
+          f"took {man['elapsed_s']}s -> {manifest_p}", flush=True)
 
 
 if __name__ == "__main__":
diff --git a/windows/tools/lora_mlx_to_gguf.py b/windows/tools/lora_mlx_to_gguf.py
index 226febf..0bb52a9 100644
--- a/windows/tools/lora_mlx_to_gguf.py
+++ b/windows/tools/lora_mlx_to_gguf.py
@@ -22,6 +22,8 @@
 """
 import argparse, os, re, struct, sys
 import numpy as np
+if hasattr(sys.stdout, "reconfigure"):                      # issue #128: Windows ANSI-codepage stdout hardening
+    sys.stdout.reconfigure(encoding="utf-8", errors="backslashreplace")
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
 from repack_mlx_to_gguf import StIndex, GgufWriter, KV, T_F16, bf16_to_f32
 from repack_r3 import ssm_ba_perm
@@ -72,6 +74,8 @@ def main():
     ap.add_argument("--alpha", type=float, default=32.0)   # = alpha baked in the source artifact; plain --lora (default scale 1.0) then reproduces the same expression
     ap.add_argument("--only", default=None, help="generate only families whose base name matches this regex (single-variable experiments)")
     ap.add_argument("--out-suffix", default="-gguf", help="infix in the output name")
+    ap.add_argument("--base", default=None,
+                    help="base GGUF for the cross-check gate (default: the conventional <dir>-gguf/edge0-<tier>.gguf sibling)")
     a = ap.parse_args()
     stem = os.path.basename(a.dir.rstrip("\\/"))
     is8 = "8b" in stem
@@ -153,16 +157,21 @@ def main():
         w.write(np.ascontiguousarray(A, np.float16).tobytes()); w.align_pad()
         w.write(np.ascontiguousarray(B, np.float16).tobytes()); w.align_pad()
     w.close(); idx.close()
-    print(f"adapter: {out}  tensors={2*len(entries)}  pairs={len(entries)} (incl. ssm_ba merge ×{comp} compensation)")
-    verify_against_base(out, "edge0-8b" if is8 else "edge0-35b")
+    print(f"adapter: {out}  tensors={2*len(entries)}  pairs={len(entries)} (incl. ssm_ba merge x{comp} compensation)")
+    base_stem = "edge0-8b" if is8 else "edge0-35b"
+    base = a.base or os.path.join(os.path.dirname(os.path.normpath(a.dir)), f"{stem}-gguf", f"{base_stem}.gguf")
+    verify_against_base(out, base)
 
 
-def verify_against_base(adapter_path, base_stem):
+def verify_against_base(adapter_path, base_path):
     """Cross-check gate: right after writing, verify (1) adapter names ⊆ base names
     (2) the upstream shape three-law (llama-adapter.cpp:358-371: a.ne0=base.ne0 ∧
     b.ne1=base.ne1 ∧ a.ne1=b.ne0; token_embd flip is a special case).
     Any miss/shape violation = hard throw, preventing the 'loads without error but
-    never enters the graph' failure mode from recurring."""
+    never enters the graph' failure mode from recurring.
+    The base GGUF path arrives as an argument (converter passes its own --out;
+    issue #128: it used to be hardcoded to <repo>/models/... and missed the app's
+    ~/.edge0/models layout on end-user machines)."""
     # gguf-py comes from the pinned vendored upstream (monorepo layout or bootstrap depot);
     # standalone checkouts fall back to an installed `gguf` package on sys.path.
     _here = os.path.dirname(os.path.abspath(__file__))
@@ -173,9 +182,12 @@ def verify_against_base(adapter_path, base_stem):
         if os.path.isdir(_p):
             sys.path.insert(0, _p)
             break
-    from gguf import GGUFReader
-    root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
-    base_path = os.path.join(root, "models", f"{base_stem}-gguf", f"{base_stem}.gguf")
+    try:
+        from gguf import GGUFReader
+    except ImportError:
+        raise SystemExit("E-DEP: cross-check gate needs gguf-py (vendored llama.cpp/gguf-py on the search path, or: pip install gguf)")
+    if not os.path.isfile(base_path):
+        raise SystemExit(f"E-BASE-MISSING: base GGUF not found at {base_path} — pass --base <path> (the converter derives it from --out)")
     bt = {str(t.name): [int(x) for x in t.shape]
           for t in GGUFReader(base_path).tensors}
     ad = GGUFReader(adapter_path)
diff --git a/windows/tools/repack_mlx_to_gguf.py b/windows/tools/repack_mlx_to_gguf.py
index f513c88..1c96e52 100644
--- a/windows/tools/repack_mlx_to_gguf.py
+++ b/windows/tools/repack_mlx_to_gguf.py
@@ -33,6 +33,8 @@
 """
 import argparse, json, os, re, struct, sys, time, hashlib
 import numpy as np
+if hasattr(sys.stdout, "reconfigure"):                      # issue #128: Windows ANSI-codepage stdout hardening
+    sys.stdout.reconfigure(encoding="utf-8", errors="backslashreplace")
 
 T_F32, T_F16, T_Q4_1 = 0, 1, 3                       # measured against fork ggml.h
 KV = dict(u32=4, i32=5, f32=6, bool=7, str=8, arr=9, u64=10, f64=12)
@@ -272,7 +274,7 @@ def run(args):
             agg.setdefault((k, idx.t[n][3], idx.t[n][4]), 0)
             agg[(k, idx.t[n][3], idx.t[n][4])] += 1
         for (k, dt, shp), c in sorted(agg.items(), key=lambda x: str(x[0])):
-            print(f"[{k:6s}] src {dt:4s} {str(list(shp)):22s} ×{c}")
+            print(f"[{k:6s}] src {dt:4s} {str(list(shp)):22s} x{c}")
         for n, why in skipped:
             print(f"[skip] {n}")
         print(f"plan={len(plan)} skip={len(skipped)}")
@@ -342,7 +344,7 @@ def run(args):
                 q8 = W[sl].view(np.uint8).reshape(sl.stop - sl.start, words * 4)
                 w.write(deq_mlx_side(q8, S[sl], Bs[sl]).astype(np.float32, copy=False).tobytes())
         w.align_pad()
-        print(f"  [{kind:6s}] {name:64s} →{str(dims):20s} {w._f.tell()/1e9:6.2f}GB {time.time()-t0:5.0f}s", flush=True)
+        print(f"  [{kind:6s}] {name:64s} ->{str(dims):20s} {w._f.tell()/1e9:6.2f}GB {time.time()-t0:5.0f}s", flush=True)
 
     audit.update(fp16_gate=dict(_gate), n_tensors=len(regs), elapsed_s=round(time.time() - t0, 1),
                  exempt_groups=len(audit_exempt), exempt_list=sorted(set(map(tuple, audit_exempt)))[:500]
@@ -359,8 +361,8 @@ def run(args):
     json.dump(dict(audit=audit, verdict=tag, gates=ng, gguf_size=os.path.getsize(gp)),
               open(os.path.join(args.out, f"{stem}-r1-audit.json"), "w"), ensure_ascii=False, indent=1)
     print(f"\nGGUF {gp}  {os.path.getsize(gp)/1e9:.2f}GB  tensors={len(regs)}  {time.time()-t0:.0f}s")
-    print(f"parity gates {ng} (mismatches outside exemptions: {nb}) · fp16 gate elems={_gate['elems']:,} "
-          f"benign={_gate['breach_benign']:,} malignant-exempt={_gate['breach']:,} ⇒ {tag}")
+    print(f"parity gates {ng} (mismatches outside exemptions: {nb}) - fp16 gate elems={_gate['elems']:,} "
+          f"benign={_gate['breach_benign']:,} malignant-exempt={_gate['breach']:,} => {tag}")
     return 0 if verdict == "GREEN" else 1
 
 
@@ -401,7 +403,7 @@ def code(r, e):
     d0, m0 = float(blocks["d"][2, 0]), float(blocks["m"][2, 0])
     for e in (0, 5, 16, 21, 31):
         assert abs(float(Bq[2, e]) - (code(2, e) * d0 + m0)) < 1e-9, f"element {e} nibble-order pin failed"
-    print("selftest pack/deq sha equality PASS · extreme codes 0/15 + cross-word nibble order PASS")
+    print("selftest pack/deq sha equality PASS - extreme codes 0/15 + cross-word nibble order PASS")
 
     p = os.path.join(args.out or ".", "_selftest.gguf")
     os.makedirs(p and (args.out or "."), exist_ok=True)
diff --git a/windows/tools/repack_r3.py b/windows/tools/repack_r3.py
index c00907c..8731148 100644
--- a/windows/tools/repack_r3.py
+++ b/windows/tools/repack_r3.py
@@ -24,6 +24,8 @@
 """
 import argparse, json, math, os, re, struct, sys, time
 import numpy as np
+if hasattr(sys.stdout, "reconfigure"):                      # issue #128: Windows ANSI-codepage stdout hardening
+    sys.stdout.reconfigure(encoding="utf-8", errors="backslashreplace")
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
 from repack_mlx_to_gguf import (StIndex, GgufWriter, KV, T_F32, T_F16, T_Q4_1, ALIGN, QK41,
                                 DT_Q41, mlx_q_bytes, pack_q41_rows, deq_mlx_side, deq_gguf_side,
@@ -280,7 +282,7 @@ def r3_spec(kind, src):
     v = "GREEN" if not bad and not audit["errors"] and n_done == len(table) else "RED"
     json.dump(dict(verdict=f"R3-artifact {v}", audit=audit, size=os.path.getsize(gp)),
               open(os.path.join(a.out, f"{stem}-audit.json"), "w"), ensure_ascii=False, indent=1)
-    print(f"\nGGUF {gp} {os.path.getsize(gp)/1e9:.2f}GB tensors={n_done}/{len(table)} ⇒ R3-artifact {v}"
+    print(f"\nGGUF {gp} {os.path.getsize(gp)/1e9:.2f}GB tensors={n_done}/{len(table)} => R3-artifact {v}"
           f" (errors={audit['errors']})")
     return 0 if v == "GREEN" else 1
 
diff --git a/windows/tools/repack_r3_8b.py b/windows/tools/repack_r3_8b.py
index 0a373ea..0b41e1b 100644
--- a/windows/tools/repack_r3_8b.py
+++ b/windows/tools/repack_r3_8b.py
@@ -34,6 +34,8 @@
 """
 import argparse, json, math, os, re, struct, sys, time
 import numpy as np
+if hasattr(sys.stdout, "reconfigure"):                      # issue #128: Windows ANSI-codepage stdout hardening
+    sys.stdout.reconfigure(encoding="utf-8", errors="backslashreplace")
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
 from repack_mlx_to_gguf import (StIndex, GgufWriter, KV, T_F32, T_F16, T_Q4_1, QK41, DT_Q41,
                                 mlx_q_bytes, pack_q41_rows, deq_mlx_side, deq_gguf_side, sha16)