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feat(mac-launcher): auto-discover an mlx_lm-capable Python (no manual KAKEYA_MAC_PYTHON) #156

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Merged
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Jun 19, 2026
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feat(mac-launcher): auto-discover an mlx_lm-capable Python (no manual KAKEYA_MAC_PYTHON) #156

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37 changes: 31 additions & 6 deletions scripts/run_kakeya_mac.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -64,10 +64,33 @@ done

log() { echo "[run-kakeya-mac] $*" >&2; }

# Pinned interpreter (Layer B): prefer KAKEYA_MAC_PYTHON (the venv python with
# mlx_lm/torch/transformers) over a bare python3 that a host reboot may have
# repointed. See docs/skills/pin-selfhosted-runner-python-env-skill.md.
PYBIN="${KAKEYA_MAC_PYTHON:-python3}"
# Pinned interpreter (Layer B): AUTO-DISCOVER the venv python that actually has
# mlx_lm (a bare `python3` is often the system/pyenv one without it, especially
# after a reboot or in a fresh shell). Try KAKEYA_MAC_PYTHON first, then common
# venv locations, then PATH pythons; pick the first that can `import mlx_lm`.
# Set KAKEYA_MAC_PYTHON to override. See
# docs/skills/pin-selfhosted-runner-python-env-skill.md.
_can_import_mlx_lm() { [ -n "${1:-}" ] && "$1" -c 'import mlx_lm' >/dev/null 2>&1; }
_resolve_pybin() {
local c
for c in \
"${KAKEYA_MAC_PYTHON:-}" \
"$repo_root/.venv-mac/bin/python3.13" \
"$repo_root/.venv-mac/bin/python" \
"$repo_root/.venv/bin/python" \
"$HOME/kakeya-venv/bin/python" \
"$HOME/.venv/bin/python" \
"$(command -v python3.13 2>/dev/null || true)" \
"$(command -v python3 2>/dev/null || true)"; do
if _can_import_mlx_lm "$c"; then printf '%s' "$c"; return 0; fi
done
# Nothing with mlx_lm — fall back to a sensible value so dry-run/preflight can
# still report a clear error.
printf '%s' "${KAKEYA_MAC_PYTHON:-python3}"
return 1
}
PYBIN="$(_resolve_pybin)" || true
log "python : $PYBIN$([ -n "${KAKEYA_MAC_PYTHON:-}" ] && echo ' (KAKEYA_MAC_PYTHON)')"

# ---- argv for the full-engine harness chat ----
args=(
Expand Down Expand Up @@ -107,9 +130,11 @@ if [[ "$DRY_RUN" == "1" ]]; then
fi

# ---- preflight (Apple Silicon + MLX + model) ----
command -v "$PYBIN" >/dev/null 2>&1 || { log "interpreter not found: $PYBIN (set KAKEYA_MAC_PYTHON)"; exit 1; }
"$PYBIN" -c "import mlx.core, mlx_lm" 2>/dev/null \
|| { log "mlx/mlx_lm not importable by $PYBIN — Apple Silicon + a venv with 'mlx mlx-lm'; set KAKEYA_MAC_PYTHON. See docs/skills/pin-selfhosted-runner-python-env-skill.md"; exit 2; }
|| { log "no Python with mlx_lm found (auto-searched KAKEYA_MAC_PYTHON, "\
"$repo_root/.venv-mac, ~/kakeya-venv, ~/.venv, python3.13, python3; tried '$PYBIN'). "\
"Activate your MLX venv or set KAKEYA_MAC_PYTHON=/path/to/venv/bin/python "\
"(needs 'mlx mlx-lm torch transformers'). See docs/skills/pin-selfhosted-runner-python-env-skill.md"; exit 2; }
[[ -d "$VERIFIER" ]] \
|| { log "verifier model dir not found: $VERIFIER (set KAKEYA_MAC_VERIFIER_PATH)"; exit 3; }
if [[ "$FAST" != "1" && ! -e "$FTHETA" ]]; then
Expand Down
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