chore: relicense MIT -> PolyForm Noncommercial 1.0.0; add support link (v0.18.1)

aci-sim remains free for personal/lab/research and other noncommercial use;
commercial use now requires permission. README gains a Buy-Me-a-Coffee badge.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

CHANGELOG.md

@@ -6,6 +6,15 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
 (pre-1.0: minor bumps may include breaking changes to the sim's behavior).
 
+## [0.18.1] - 2026-07-07
+
+### Changed
+- **License: MIT -> PolyForm Noncommercial 1.0.0** — aci-sim stays free for
+  personal, lab, research, and other noncommercial use; commercial use now
+  requires the author's permission. (`LICENSE`, `pyproject.toml` SPDX field,
+  README badge + License section.)
+- README: added a Buy-Me-a-Coffee badge/link.
+
 ## [0.18.0] - 2026-07-06
 
 ### Added

LICENSE

@@ -1,21 +1,134 @@
-MIT License
+PolyForm Noncommercial License 1.0.0
 
-Copyright (c) 2026 aci-sim contributors
+Required Notice: Copyright (c) 2026 Tao D (https://github.com/dtzp555-max/aci-sim)
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in all
+<https://polyformproject.org/licenses/noncommercial/1.0.0>
-copies or substantial portions of the Software.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+## Acceptance
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+In order to get any license under these terms, you must agree
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+to them as both strict obligations and conditions to all
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+your licenses.
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+
-SOFTWARE.
+## Copyright License
+
+The licensor grants you a copyright license for the
+software to do everything you might do with the software
+that would otherwise infringe the licensor's copyright
+in it for any permitted purpose.  However, you may
+only distribute the software according to [Distribution
+License](#distribution-license) and make changes or new works
+based on the software according to [Changes and New Works
+License](#changes-and-new-works-license).
+
+## Distribution License
+
+The licensor grants you an additional copyright license
+to distribute copies of the software.  Your license
+to distribute covers distributing the software with
+changes and new works permitted by [Changes and New Works
+License](#changes-and-new-works-license).
+
+## Notices
+
+You must ensure that anyone who gets a copy of any part of
+the software from you also gets a copy of these terms or the
+URL for them above, as well as copies of any plain-text lines
+beginning with `Required Notice:` that the licensor provided
+with the software.  For example:
+
+> Required Notice: Copyright Yoyodyne, Inc. (http://example.com)
+
+## Changes and New Works License
+
+The licensor grants you an additional copyright license to
+make changes and new works based on the software for any
+permitted purpose.
+
+## Patent License
+
+The licensor grants you a patent license for the software that
+covers patent claims the licensor can license, or becomes able
+to license, that you would infringe by using the software.
+
+## Noncommercial Purposes
+
+Any noncommercial purpose is a permitted purpose.
+
+## Personal Uses
+
+Personal use for research, experiment, and testing for
+the benefit of public knowledge, personal study, private
+entertainment, hobby projects, amateur pursuits, or religious
+observance, without any anticipated commercial application,
+is use for a permitted purpose.
+
+## Noncommercial Organizations
+
+Use by any charitable organization, educational institution,
+public research organization, public safety or health
+organization, environmental protection organization,
+or government institution is use for a permitted purpose
+regardless of the source of funding or obligations resulting
+from the funding.
+
+## Fair Use
+
+You may have "fair use" rights for the software under the
+law. These terms do not limit them.
+
+## No Other Rights
+
+These terms do not allow you to sublicense or transfer any of
+your licenses to anyone else, or prevent the licensor from
+granting licenses to anyone else.  These terms do not imply
+any other licenses.
+
+## Patent Defense
+
+If you make any written claim that the software infringes or
+contributes to infringement of any patent, your patent license
+for the software granted under these terms ends immediately. If
+your company makes such a claim, your patent license ends
+immediately for work on behalf of your company.
+
+## Violations
+
+The first time you are notified in writing that you have
+violated any of these terms, or done anything with the software
+not covered by your licenses, your licenses can nonetheless
+continue if you come into full compliance with these terms,
+and take practical steps to correct past violations, within
+32 days of receiving notice.  Otherwise, all your licenses
+end immediately.
+
+## No Liability
+
+***As far as the law allows, the software comes as is, without
+any warranty or condition, and the licensor will not be liable
+to you for any damages arising out of these terms or the use
+or nature of the software, under any kind of legal claim.***
+
+## Definitions
+
+The **licensor** is the individual or entity offering these
+terms, and the **software** is the software the licensor makes
+available under these terms.
+
+**You** refers to the individual or entity agreeing to these
+terms.
+
+**Your company** is any legal entity, sole proprietorship,
+or other kind of organization that you work for, plus all
+organizations that have control over, are under the control of,
+or are under common control with that organization.  **Control**
+means ownership of substantially all the assets of an entity,
+or the power to direct its management and policies by vote,
+contract, or otherwise.  Control can be direct or indirect.
+
+**Your licenses** are all the licenses granted to you for the
+software under these terms.
+
+**Use** means anything you do with the software requiring one
+of your licenses.

README.md

@@ -5,7 +5,8 @@ run Ansible `cisco.aci` playbooks, ACI SDKs, or an AI agent against it like
 real gear, with no hardware required.
 
 [![CI](https://github.com/dtzp555-max/aci-sim/actions/workflows/ci.yml/badge.svg)](https://github.com/dtzp555-max/aci-sim/actions/workflows/ci.yml)
-[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
+[![License: PolyForm Noncommercial](https://img.shields.io/badge/License-PolyForm_Noncommercial-blue.svg)](LICENSE)
+[![Buy Me a Coffee](https://img.shields.io/badge/Buy_Me_a_Coffee-ffdd00?logo=buy-me-a-coffee&logoColor=black)](https://buymeacoffee.com/dtzp555)
 [![Python 3.11+](https://img.shields.io/badge/python-3.11+-blue.svg)](pyproject.toml)
 
 A faithful REST **simulator of a 2-site Cisco ACI fabric** — a per-site APIC
@@ -1180,4 +1181,8 @@ via plain pytest.
 
 ## License
 
-MIT — see `LICENSE`.
+PolyForm Noncommercial 1.0.0 — free for personal, lab, research, and any other
+noncommercial use. Commercial use needs my permission first. See `LICENSE`.
+
+Built nights and weekends. If aci-sim saves you a lab, you can
+[buy me a coffee](https://buymeacoffee.com/dtzp555). ☕

pyproject.toml

@@ -1,16 +1,16 @@
 [project]
 name = "aci-sim"
-version = "0.18.0"
+version = "0.18.1"
 description = "Faithful REST simulator of a 2-site Cisco ACI fabric (per-site APIC + ND/NDO)"
 readme = "README.md"
-license = "MIT"
+license = "PolyForm-Noncommercial-1.0.0"
 authors = [
     { name = "aci-sim contributors" },
 ]
 requires-python = ">=3.11"
 classifiers = [
-    # No "License :: OSI Approved :: MIT License" classifier: the SPDX
+    # No license classifier: the SPDX `license` field above supersedes
-    # `license = "MIT"` field above supersedes license classifiers (PEP 639)
+    # license classifiers (PEP 639)
     # and modern setuptools rejects having both.
     "Development Status :: 4 - Beta",
     "Intended Audience :: Developers",