Add misc. files, some copyright headers, and tweak a couple of details (#32)

Changes:

* Add miscellaneous files like `SUPPORT.md` and a security policy
statement
* Add a `.editorconfig` file that matches the indentation & line length
used in this project
* Add some copyright headers to files at the top level
* Make trivial tweaks to `setup.py` and `ci.yml`

Author: mhucka

.clang-format

@@ -1,3 +1,18 @@
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# IMPORTANT: if you change values here, update .editorconfig to match.
 ---
 Language: Cpp
 BasedOnStyle: Google

.editorconfig

@@ -0,0 +1,46 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+root = true
+
+# We mostly follow Google style guides (https://google.github.io/styleguide/)
+# with only a few deviations for line length and indentation in some files.
+
+# IMPORTANT: some of the other config files (.clang-format, etc.) also have
+# the same settings and need to be updated if changes are made to this file.
+[*]
+charset = utf-8
+indent_style = space
+insert_final_newline = true
+spelling_language = en-US
+trim_trailing_whitespace = true
+max_line_length = 120
+
+[{BUILD,WORKSPACE}]
+indent_size = 4
+
+[{CMakeLists.txt}]
+indent_size = 4
+
+[{*.cc,*.h}]
+indent_size = 4
+
+[*.py]
+indent_size = 4
+
+[*.toml]
+indent_size = 4
+
+[{*.yaml,*.yml,*.cff}]
+indent_size = 2

.github/SECURITY.md

@@ -0,0 +1,31 @@
+# Reporting security issues
+
+This project's developers and community are committed to addressing security
+bugs promptly and effectively. We appreciate your efforts to disclose your
+findings responsibly, and will make every effort to acknowledge your
+contributions.
+
+Please **do not** use GitHub issues to report security vulnerabilities; GitHub
+issues are public, and doing so could allow someone to exploit the information
+before the problem can be addressed. Instead, please use the *Report a
+vulnerability* button from the *Security* tab at the top of this GitHub
+repository page.
+
+Please report security issues in third-party modules to the person or team
+maintaining the module rather than this project's stewards, unless you believe
+that some action needs to be taken specifically with this project in order to
+guard against the effects of a security vulnerability in third-party software.
+
+## Responses to security reports
+
+The project stewards at Google Quantum AI will send a response indicating the
+next steps in handling your report. After the initial reply to your report, the
+project stewards will keep you informed of the progress towards a fix and full
+announcement, and may ask for additional information or guidance.
+
+## Additional points of contact
+
+Please contact the project stewards at Google Quantum AI via email at
+quantum-oss-maintainers@google.com if you have questions or other concerns. If
+for any reason you are uncomfortable reaching out to the project stewards,
+please email opensource@google.com instead.

.github/workflows/ci.yml

@@ -273,7 +273,6 @@ jobs:
           # For efficiency, test just one wheel for each platform.
           pattern: '*cp311*'
           merge-multiple: true
-      - run: pwd && ls -lR dist-chromobius
       - uses: pypa/gh-action-pypi-publish@ed0c53931b1dc9bd32cbe73a98c7f6766f8a527e # v1
         with:
           repository-url: ${{env.testpypi_endpoint_url}}
@@ -314,6 +313,7 @@ jobs:
           path: dist-chromobius
           pattern: dist-chromobius-*
           merge-multiple: true
+      - run: pwd && ls -lR dist-chromobius
       - uses: pypa/gh-action-pypi-publish@ed0c53931b1dc9bd32cbe73a98c7f6766f8a527e # v1
         with:
           packages-dir: dist-chromobius/

BUILD

@@ -1,3 +1,17 @@
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 package(default_visibility = ["//visibility:public"])
 
 load("@rules_python//python:packaging.bzl", "py_wheel")

CODE_OF_CONDUCT.md

@@ -0,0 +1,91 @@
+# Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of
+experience, education, socio-economic status, nationality, personal appearance,
+race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+*   Using welcoming and inclusive language
+*   Being respectful of differing viewpoints and experiences
+*   Gracefully accepting constructive criticism
+*   Focusing on what is best for the community
+*   Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+*   The use of sexualized language or imagery and unwelcome sexual attention or
+    advances
+*   Trolling, insulting/derogatory comments, and personal or political attacks
+*   Public or private harassment
+*   Publishing others' private information, such as a physical or electronic
+    address, without explicit permission
+*   Other conduct which could reasonably be considered inappropriate in a
+    professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, or to ban temporarily or permanently any
+contributor for other behaviors that they deem inappropriate, threatening,
+offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+This Code of Conduct also applies outside the project spaces when the Project
+Stewards have a reasonable belief that an individual's behavior may have a
+negative impact on the project or its community.
+
+## Conflict Resolution
+
+We do not believe that all conflict is bad; healthy debate and disagreement
+often yield positive results. However, it is never okay to be disrespectful or
+to engage in behavior that violates the project’s Code of Conduct.
+
+If you see someone violating the Code of Conduct, you are encouraged to address
+the behavior directly with those involved. Many issues can be resolved quickly
+and easily, and this gives people more control over the outcome of their
+dispute. If you are unable to resolve the matter for any reason, or if the
+behavior is threatening or harassing, report it. We are dedicated to providing
+an environment where participants feel welcome and safe.
+
+Reports should be directed to quantumai-oss-maintainers@googlegroups.com,
+the project stewards at Google Quantum AI. They will then work with a committee
+consisting of representatives from the Open Source Programs Office and the
+Google Open Source Strategy team. If for any reason you are uncomfortable
+reaching out to the Project Stewards, please email opensource@google.com.
+
+We will investigate every complaint, but you may not receive a direct response.
+We will use our discretion in determining when and how to follow up on reported
+incidents, which may range from not taking action to permanent expulsion from
+the project and project-sponsored spaces. We will notify the accused of the
+report and provide them an opportunity to discuss it before any action is taken.
+The identity of the reporter will be omitted from the details of the report
+supplied to the accused. In potentially harmful situations, such as ongoing
+harassment or threats to anyone's safety, we may take action without notice.
+
+## Attribution
+
+This Code of Conduct is adapted from the Contributor Covenant, version 1.4,
+available at
+https://www.contributor-covenant.org/version/1/4/code-of-conduct.html

README.md

@@ -110,3 +110,10 @@ eligible for the [Google Open Source Software Vulnerability Rewards
 Program](https://bughunters.google.com/open-source-security).
 
 Copyright 2025 Google LLC.
+
+<div align="center">
+  <a href="https://quantumai.google">
+    <img width="15%" alt="Google Quantum AI"
+         src="./assets/quantum-ai-vertical.svg">
+  </a>
+</div>

SUPPORT.md

@@ -0,0 +1,21 @@
+# Support
+
+Thank you for your interest in this project! If you are experiencing problems
+or have questions, the following are some suggestions for how to get help.
+
+> [!NOTE]
+> Before participating in our community, please read our [code of
+> conduct](CODE_OF_CONDUCT.md). By interacting with this repository,
+> organization, or community, you agree to abide by its terms.
+
+## Report an issue or request a feature
+
+To report an issue or request a feature, please first search this project's
+issue tracker on GitHub to check if there is already an open issue identical or
+similar to your bug report/feature request. If there is none, go ahead and file
+a new issue in the issue tracker.
+
+## Contact the maintainers
+
+For any questions or concerns not addressed here, please email
+quantum-oss-maintainers@google.com.

WORKSPACE

@@ -1,3 +1,17 @@
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")