tsugi

Unified developer surface for TsugiCinema's open-source distributed-training SDKs.

pip install tsugi

tsugi is a thin packaging-level wrapper that depends on and re-exports two physically separate Apache-2.0 SDKs published by TsugiCinema, Inc.

PyPI package	Imports as	Role	Patent posture
tsugi-mend	tsugi.mend	Cross-rack reducer	Patent-independent
tsugi-kpool	tsugi.kpool	K-Pool LoRA / Infinity analog	Patent-aligned

(tsugi-mend integrates Decoupled DiLoCo + DES-LOC + async-TP + FALCON; tsugi-kpool is the software analog of US App. 64/060,315 and 64/055,093. See the sections below.)

The two sub-SDKs share zero code. This meta-package exposes them under a unified import namespace for developer convenience. Both sub-SDKs and this meta-package are licensed under the Apache License, Version 2.0.

Status

Pre-Alpha (0.1.4). APIs are stabilizing. Cross-SDK integration patterns may evolve. The sub-SDK packages (tsugi-mend 0.1.5, tsugi-kpool 0.1.3) are pinned by exact version in this meta-package's dependencies.

Quickstart

import tsugi

tsugi.about()
# tsugi 0.1.4  unified developer surface
#   tsugi-mend  0.1.5  Apache-2.0  patent-independent (Decoupled DiLoCo + DES-LOC + async-TP + FALCON)
#   tsugi-kpool 0.1.3  Apache-2.0  patent-aligned (US App. 64/060,315 K-Pool LoRA + US App. 64/055,093 Infinity)

Cross-rack reducer (tsugi.mend)

from tsugi.mend import MendConfig, mend_init, mend_shutdown

# After your model is wrapped (FSDP, TP, etc.):
config = MendConfig(quorum_min_learners=2, grace_window_ms=2000)
mend_init(model, config)

# ... train ...

mend_shutdown(model)

See tsugi-mend for benchmark protocols, the multi-stage validation record (Stage A through Stage E-prime), and the Phase 2 sprint plan.

K-Pool LoRA / Infinity (tsugi.kpool)

from tsugi.kpool import KPoolLoraConfig, plesio_init, plesio_shutdown

config = KPoolLoraConfig(
    r=16,
    lora_alpha=32,
    n_adapters=8,
    k_active=4,
    sideband_enabled=True,
    aggregation_mode="buffer_convergence",
)
plesio_init(model, config)

# ... train with K-of-N adapter routing ...

plesio_shutdown(model)

See tsugi-kpool for the buffer-convergence trigger characterization and the K-of-N routing semantics.

Architecture

tsugi itself is a torch-free import: import tsugi resolves only to configuration dataclasses on each sub-SDK. The runtime functions (mend_init, plesio_init, etc.) lazy-import torch via each sub-SDK's facade on first call. This keeps documentation builds and torch-free CI environments working.

When you actually call a runtime function, that sub-SDK loads torch and its own runtime machinery. The two sub-SDKs never cross-reference each other; they can be installed and used independently of this meta-package.

License and IP posture

Apache-2.0 with full automatic patent grant. See LICENSE for the preamble that distinguishes this meta-package's grant scope from each sub-SDK's grant scope, and NOTICE for the attribution chain to the upstream sub-SDKs.

The patent posture, in brief:

• This meta-package itself contains no patent-exercising code. Its Apache-2.0 patent grant covers only the thin wrapper code in this repository.
• tsugi-mend is patent-independent. Its Apache-2.0 grant does not extend to TsugiCinema's K-Pool LoRA or Infinity patent estates.
• tsugi-kpool is patent-aligned. Its Apache-2.0 grant in Section 3 extends to TsugiCinema's K-Pool LoRA (US App. 64/060,315) and Infinity (US App. 64/055,093) patent estates AS PRACTICED BY THE SDK CODE AS DISTRIBUTED. Apache-2.0 Section 3's "necessarily infringed by their Contribution" language bounds the patent license to the specific embodiment present in the SDK code, not the broader scope of the patent claims as filed.

Links

• Homepage: https://tsugilabs.ai
• Companion SDK (Mend): https://github.com/tsugiai/tsugi-mend
• Companion SDK (KPool): https://github.com/tsugiai/tsugi-kpool