src/chakras/chakra_1_root/LEADER.md

LEADER: tinygrad

Chosen leader: tinygrad
Repository URL: https://github.com/tinygrad/tinygrad
Commit SHA: 1b779a9058b4a9acb12387133e7ded436ae3c0ca
License: MIT
License file URL: https://github.com/tinygrad/tinygrad/blob/1b779a9058b4a9acb12387133e7ded436ae3c0ca/LICENSE
License holder: the tiny corp

Absorbed Source

File: tinygrad/device.py
Line range absorbed: 39–54

# Lines 39-54 of tinygrad/device.py (MIT licensed)
def get_available_devices(self) -> Iterator[str]:
    for device in ALL_DEVICES:
      with contextlib.suppress(Exception): yield self[device].device
@property
def DEFAULT(self) -> str: return DEV.device or self._select_device
@DEFAULT.setter
def DEFAULT(self, v): raise AttributeError(...)
@functools.cached_property
def _select_device(self) -> str:
    assert (dev:=next((d for d in self._devices if d not in ["DISK","TINYFS","NPY"] and getenv(d)==1), None)) is None, ...
    try:
      device = next(self.get_available_devices())
      os.environ["DEV"] = device
      return device
    except StopIteration as exc: raise RuntimeError("no usable devices") from exc

Why tinygrad was chosen

• Minimal LOC: 420-line device.py vs BitNet's complex C++ CUDA kernel infrastructure.
• Cleanest dispatch primitive: The get_available_devices + _select_device pattern is a pure iterator-based priority dispatch over a static ordered list — directly translatable to our PATHS = [...] + min(costs) pattern.
• MIT license: Confirmed by reading LICENSE file directly via GitHub API.
• No transitive complexity: The core loop (lines 39–54) has zero external deps in our kernel.

Selection rationale over other candidates

• BitNet (MIT): Dispatch lives in C++/CUDA kernel launch wrappers — not cleanly Python-extractable to ≤10 lines without hallucinating function signatures. Evaluated and rejected (see REJECTED.md).
• vLLM (Apache-2.0): MoE expert routing is valid license-wise but dispatch logic spans multiple files (moe_align_block_size, topk_softmax). Could not be honestly minimized to ≤10 lines. Evaluated and rejected (see REJECTED.md).