Copilot commented on code in PR #50375: URL: https://github.com/apache/arrow/pull/50375#discussion_r3551342171
########## AGENTS.md: ########## @@ -0,0 +1,157 @@ +<!--- + Licensed to the Apache Software Foundation (ASF) under one + or more contributor license agreements. See the NOTICE file + distributed with this work for additional information + regarding copyright ownership. The ASF licenses this file + to you 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. +--> + +# AGENTS.md + +This file provides guidance for AI coding agents working on Apache Arrow. + +Apache Arrow is a multi-language toolbox for accelerated data interchange +and in-memory processing. + +## Repository Layout + +| Directory | Description | +|-----------|-------------| +| `cpp/` | Core C++ library (libarrow, Parquet, Flight, Gandiva, etc.) | +| `python/` | PyArrow (Python bindings for libarrow) | +| `r/` | R package | +| `c_glib/` | C/GLib bindings | +| `ruby/` | Ruby bindings | +| `matlab/` | MATLAB implementation | +| `docs/` | Sphinx documentation source | +| `ci/` | CI configuration (Docker, scripts) | +| `dev/` | Developer tools and release scripts | +| `format/` | Arrow columnar format specification | +| `testing/` | Shared test data (integration testing) | + +Several implementations have moved to their own repositories: + +- **Java**: [apache/arrow-java](https://github.com/apache/arrow-java) +- **Go**: [apache/arrow-go](https://github.com/apache/arrow-go) +- **Rust**: [apache/arrow-rs](https://github.com/apache/arrow-rs) +- **C#**: [apache/arrow-csharp](https://github.com/apache/arrow-csharp) +- **JavaScript**: [apache/arrow-js](https://github.com/apache/arrow-js) +- **Swift**: [apache/arrow-swift](https://github.com/apache/arrow-swift) +- **Julia**: [apache/arrow-julia](https://github.com/apache/arrow-julia) + +## License Headers + +All new source files must include the Apache License 2.0 header. +Copy the header format from an existing file in the same directory. + +## Cross-Language Dependencies + +The C++ library (`cpp/`) is the shared core. PyArrow, R, and MATLAB +bind directly to it. C/GLib wraps the C++ library, and Ruby binds to +C/GLib. Changes in `cpp/` can break any of these downstream components. +When modifying C++ code, consider the impact on dependent bindings. + +## Git Conventions + +### Remote Names + +- `upstream` → `apache/arrow` (fetch from here) +- `origin` → your fork (push PR branches here) + +Verify with `git remote -v` before pushing. Never push directly to +`upstream`. + +### Commit Messages + +Use imperative mood and focus on *why*, not *what*. + +Good: `Fix UnionArray validation when type codes are non-contiguous` +Bad: `Fixed the bug in union array` + +## Issue Conventions + +- Follow the issue templates at + https://github.com/apache/arrow/tree/main/.github/ISSUE_TEMPLATE + when creating a new issue. +- Do NOT include a `GH-` prefix in issue titles (that is only for PRs). +- Search existing issues before creating a new one. + +## Pull Request Conventions + +### Title Format + +``` +GH-<issue-number>: [Component] Short description +``` + +Example: `GH-14736: [C++][Python] Ensure no validity bitmap in UnionArray::SetData` + +### MINOR Changes + +For trivial documentation or typo fixes affecting no more than 2 files and +no more than 500 words, you may skip creating an issue and prefix the PR +title with `MINOR:` instead: + +``` +MINOR: [Docs] Fix typo in memory.rst +``` + +Do NOT combine `MINOR:` with a `GH-` number. Review Comment: The repo’s PR title checker treats a PR as MINOR only when the title starts with `MINOR: ` (note the required space after the colon). Using `MINOR:` without the space can cause the title check workflow to fail; this also matches the wording in CONTRIBUTING.md. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
