PyLibMS

LICENSE

PyLibMS is a library built in Python 3.10 and above for reading and writing of libMessageStudio (LMS) proprietary file formats from Nintendo.

The following is supported:

Format	Read	Write	Support
`MSBT`	✅	✅	1:1 Reading and writing Support for majority of sections. Full attribute (`ATR1`) decoding with configurations. Tag decoding 1:1 with the official Nintendo `.mstxt` file format.
`MSBF`	✅	✅	1:1 Reading and writing flowcharts (`FLW3`). Support for custom node definitions, attaching names and descriptions to nodes. Altering parameter datatypes for flexibility between games.
`MSBP`	✅	❌	Viewing all MSBP relevant metadata and generating configuration files for use with `MSBT` files.

This library is designed to support LMS revision >=3.0. These include files generated for late Wii titles, Nintendo 3DS, Wii U, Mobile, Nintendo Switch and Nintendo Switch 2 games.

Features and Usage

Simple preview of the library is below. See the wiki for more explanations and examples.

Reading

# MSBT
from lms.message.msbtio import read_msbt_path

msbt = read_msbt_path("Text.msbt")

# MSBP
from lms.project.msbpread import read_msbp_path

msbp = read_msbp_path("Project.msbp")

# MSBF
from lms.flowchart.msbfio import read_msbf_path

msbf = read_msbf_path("Flowchart.msbf")

Writing

# MSBT
from lms.message.msbtio import write_msbt_path

write_msbt_path("Out_text.msbt")

# MSBF
from lms.flowchart.msbfio import write_msbf_path

write_msbf_path("Out_Flowchart.msbf")

Adding/Editing Presets

To add or edit Preset, you may create an issue with the relevant yaml file and the game it is for.

Installation

pip install PyLibMS

Pip Page

Build Instructions

Python version must be 3.10 or higher.

Clone the repository, then run pip install (venv recommended)

git clone https://github.com/AbdyyEee/PylibMS.git
cd PyLibMS
pip install -e .

AI Disclaimer

Code in this library was written by me. AI was utilized occasionally when fit and always reviewed by me.

MSBT: Only usage of AI was for control tag regex formats and for understanding implementing string importing with re.

MSBP: AI was not utilized anywhere.

MSBF: AI was only utilized for the LMS_BaseNode.get_descendents function and for consultation for ways to improve the API.

Credits & Sources

SS-Decomp: Referenced some parts of their MSBF decomp when adding the format to Nintendo-File-Formats and this library.
Nintendo-File-Formats by Kinnay: For existing information on the MSBT and MSBP file formats.
Trippixyz: For helping me get started general decompilation of the formats and general help.
AeonSake: Inspiration for some the implementation of the library and a bit of general help.

Metadata

Release files for PyLibMS 5.0.0

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for PyLibMS 5.0.0
File	Size	Uploaded
pylibms-5.0.0.tar.gz	57.3 kB	Oct 4, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for PyLibMS 5.0.0
File	Interpreter	ABI	Platform	Reset
pylibms-5.0.0-py3-none-any.whl 77.7 kB Oct 4, 2026	Python 3	none	any	Details

Total release size: 135.0 kB

Release files / pylibms-5.0.0.tar.gz

Download URL	pylibms-5.0.0.tar.gz
Size	57.3 kB
Tags	Source
SHA-256 checksum How to use checksums	`0fdc0fc1cb65ff2e68f2743510d3ccdff13fe55409f128dac01d4e5a018d5268`
BLAKE2b-256 checksum How to use checksums	`7cf96e46b1394b3ed5bad7c94d2073f6bc2c0a77cb31258778245198415cf1cf`
Upload date	Oct 4, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.14.6`

Release files / pylibms-5.0.0-py3-none-any.whl

Download URL	pylibms-5.0.0-py3-none-any.whl
Size	77.7 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`26f9eb5b8ee7be759dfcfd24a4156996a14149ad23ff9a93dd97872fec7fff15`
BLAKE2b-256 checksum How to use checksums	`3eb46419ae9a5be184f6bea24688e485a8d09b8089540ad12aff06fed970a031`
Upload date	Oct 4, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.14.6`