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 <section id="using-ai-coding-assistants">
 <h1>Using AI Coding Assistants<a class="headerlink" href="#using-ai-coding-assistants" title="Link to this heading">#</a></h1>
 <p>If you write DataFusion Python code with an AI coding assistant, this
 project ships machine-readable guidance so the assistant produces
 idiomatic code rather than guessing from its training data.</p>
 <section id="what-is-published">
 <h2>What is published<a class="headerlink" href="#what-is-published" title="Link to this heading">#</a></h2>
 <ul class="simple">
 <li><p><a class="reference external" href="https://github.com/apache/datafusion-python/blob/main/skills/datafusion_python/SKILL.md">SKILL.md</a> —
 a dense, skill-oriented reference covering imports, data loading,
 DataFrame operations, expression building, SQL-to-DataFrame mappings,
 idiomatic patterns, and common pitfalls. Follows the
 <a class="reference external" href="https://agentskills.io">Agent Skills</a> open standard.</p></li>
 <li><p><a class="reference external" href="https://datafusion.apache.org/python/llms.txt">llms.txt</a> — an entry point for LLM-based tools following the
 <a class="reference external" href="https://llmstxt.org">llmstxt.org</a> convention. Categorized links to the
 skill, user guide, API reference, and examples.</p></li>
 </ul>
 <p>Both files live at stable URLs so an agent can discover them without a
 checkout of the repo.</p>
 </section>
 <section id="installing-the-skill">
 <h2>Installing the skill<a class="headerlink" href="#installing-the-skill" title="Link to this heading">#</a></h2>
 <p><strong>Preferred:</strong> run</p>
 <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>npx<span class="w"> </span>skills<span class="w"> </span>add<span class="w"> </span>apache/datafusion-python
 </pre></div>
 </div>
 <p>This installs the skill in any supported agent on your machine (Claude
 Code, Cursor, Windsurf, Cline, Codex, Copilot, Gemini CLI, and others).
 The command writes the pointer into the agent’s configuration so that any
 project you open that uses DataFusion Python picks up the skill
 automatically.</p>
 <p><strong>Manual:</strong> if you are not using the <code class="docutils literal notranslate"><span class="pre">skills</span></code> registry, paste this
 single line into your project’s <code class="docutils literal notranslate"><span class="pre">AGENTS.md</span></code> or <code class="docutils literal notranslate"><span class="pre">CLAUDE.md</span></code>:</p>
 <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">For</span> <span class="n">DataFusion</span> <span class="n">Python</span> <span class="n">code</span><span class="p">,</span> <span class="n">see</span> <span class="n">https</span><span class="p">:</span><span class="o">//</span><span class="n">github</span><span class="o">.</span><span class="n">com</span><span class="o">/</span><span class="n">apache</span><span class="o">/</span><span class="n">datafusion</span><span class="o">-</span><span class="n">python</span><span class="o">/</span><span class="n">blob</span><span class="o">/</span><span class="n">main</span><span class="o">/</span><span class="n">skills</span><span class="o">/</span><span class="n">datafusion_python</span><span class="o">/</span><span class="n">SKILL</span><span class="o">.</span><span class="n">md</span>
 </pre></div>
 </div>
 <p>Most assistants resolve that pointer the first time they see a
 DataFusion-related prompt in the project.</p>
 </section>
 <section id="what-the-skill-covers">
 <h2>What the skill covers<a class="headerlink" href="#what-the-skill-covers" title="Link to this heading">#</a></h2>
 <p>Writing DataFusion Python code has a handful of conventions that are easy
 for a model to miss — bitwise <code class="docutils literal notranslate"><span class="pre">&amp;</span></code> / <code class="docutils literal notranslate"><span class="pre">|</span></code> / <code class="docutils literal notranslate"><span class="pre">~</span></code> instead of Python
 <code class="docutils literal notranslate"><span class="pre">and</span></code> / <code class="docutils literal notranslate"><span class="pre">or</span></code> / <code class="docutils literal notranslate"><span class="pre">not</span></code>, the lazy-DataFrame immutability model, how
 window functions replace SQL correlated subqueries, the <code class="docutils literal notranslate"><span class="pre">case</span></code> /
 <code class="docutils literal notranslate"><span class="pre">when</span></code> builder syntax, and the <code class="docutils literal notranslate"><span class="pre">in_list</span></code> / <code class="docutils literal notranslate"><span class="pre">array_position</span></code> options
 for membership tests. The skill enumerates each of these with short,
 copyable examples.</p>
 <p>It is <em>not</em> a replacement for this user guide. Think of it as a distilled
 reference the assistant keeps open while it writes code for you.</p>
 </section>
 <section id="if-you-are-an-agent-author">
 <h2>If you are an agent author<a class="headerlink" href="#if-you-are-an-agent-author" title="Link to this heading">#</a></h2>
 <p>The skill file and <code class="docutils literal notranslate"><span class="pre">llms.txt</span></code> are the two supported integration
 points. Both are versioned along with the release and follow open
 standards — no project-specific handshake is required.</p>
 </section>
 </section>


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