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        Get embeddings
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        Batched executor - basic guidance
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        ChatSession - stripping role names
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        ChatSession - with history
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        ChatSession - restarting
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        ChatSession - Basic
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        Get embeddings
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        Grammar - json response
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        Instruct executor - basic
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        Interactive executor - basic
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        Kernel-memory - save & load
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        LLaVA - basic
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        ChatSession - load & save
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        Executor - save/load state
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        Quantization
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        Semantic-kernel - chat
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        Semantic-kernel - with kernel-memory
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        Semantic-kernel - basic
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        Stateless executor
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<h1 id="llamasharp-chat-session">LLamaSharp chat session<a class="headerlink" href="#llamasharp-chat-session" title="Permanent link"></a></h1>
<h2 id="basic-usages-of-chatsession">Basic usages of ChatSession<a class="headerlink" href="#basic-usages-of-chatsession" title="Permanent link"></a></h2>
<p><code>ChatSession</code> is a higher-level abstraction than the executors. In the context of a chat application like ChatGPT, a "chat session" refers to an interactive conversation or exchange of messages between the user and the chatbot. It represents a continuous flow of communication where the user enters input or asks questions, and the chatbot responds accordingly. A chat session typically starts when the user initiates a conversation with the chatbot and continues until the interaction comes to a natural end or is explicitly terminated by either the user or the system. During a chat session, the chatbot maintains the context of the conversation, remembers previous messages, and generates appropriate responses based on the user's inputs and the ongoing dialogue.</p>
<h3 id="initialize-a-session">Initialize a session<a class="headerlink" href="#initialize-a-session" title="Permanent link"></a></h3>
<p>Currently, the only parameter that is accepted is an <code>ILLamaExecutor</code>, because this is the only parameter that we're sure to exist in all the future versions. Since it's the high-level abstraction, we're conservative to the API designs. In the future, there may be more kinds of constructors added.</p>
<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal">1</span>
<span class="normal">2</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="n">InteractiveExecutor</span><span class="w"> </span><span class="n">ex</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="p">(</span><span class="k">new</span><span class="w"> </span><span class="n">LLamaModel</span><span class="p">(</span><span class="k">new</span><span class="w"> </span><span class="n">ModelParams</span><span class="p">(</span><span class="n">modelPath</span><span class="p">)));</span>
<span class="n">ChatSession</span><span class="w"> </span><span class="n">session</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">ChatSession</span><span class="p">(</span><span class="n">ex</span><span class="p">);</span>
</code></pre></div></td></tr></table></div>
<h3 id="chat-with-the-bot">Chat with the bot<a class="headerlink" href="#chat-with-the-bot" title="Permanent link"></a></h3>
<p>There'll be two kinds of input accepted by the <code>Chat</code> API, which are <code>ChatHistory</code> and <code>String</code>. The API with string is quite similar to that of the executors. Meanwhile, the API with <code>ChatHistory</code> is aimed to provide more flexible usages. For example, you have had a chat with the bot in session A before you open the session B. Now session B has no memory for what you said before. Therefore, you can feed the history of A to B.</p>
<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span>
<span class="normal">4</span>
<span class="normal">5</span>
<span class="normal">6</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="kt">string</span><span class="w"> </span><span class="n">prompt</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">&quot;What is C#?&quot;</span><span class="p">;</span>

<span class="k">await</span><span class="w"> </span><span class="nf">foreach</span><span class="w"> </span><span class="p">(</span><span class="kt">var</span><span class="w"> </span><span class="n">text</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">session</span><span class="p">.</span><span class="n">ChatAsync</span><span class="p">(</span><span class="n">prompt</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">InferenceParams</span><span class="p">()</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="n">Temperature</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">0.6f</span><span class="p">,</span><span class="w"> </span><span class="n">AntiPrompts</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">List</span><span class="o">&lt;</span><span class="kt">string</span><span class="o">&gt;</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="s">&quot;User:&quot;</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="p">}))</span><span class="w"> </span><span class="c1">// the inference params should be changed depending on your statement</span>
<span class="p">{</span>
<span class="w">    </span><span class="n">Console</span><span class="p">.</span><span class="n">Write</span><span class="p">(</span><span class="n">text</span><span class="p">);</span>
<span class="p">}</span>
</code></pre></div></td></tr></table></div>
<h3 id="get-the-history">Get the history<a class="headerlink" href="#get-the-history" title="Permanent link"></a></h3>
<p>Currently <code>History</code> is a property of <code>ChatSession</code>.</p>
<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span>
<span class="normal">4</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="k">foreach</span><span class="p">(</span><span class="kt">var</span><span class="w"> </span><span class="n">rec</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">session</span><span class="p">.</span><span class="n">History</span><span class="p">.</span><span class="n">Messages</span><span class="p">)</span>
<span class="p">{</span>
<span class="w">    </span><span class="n">Console</span><span class="p">.</span><span class="n">WriteLine</span><span class="p">(</span><span class="s">$&quot;{rec.AuthorRole}: {rec.Content}&quot;</span><span class="p">);</span>
<span class="p">}</span>
</code></pre></div></td></tr></table></div>
<h2 id="saveload-chat-session">Save/Load Chat Session<a class="headerlink" href="#saveload-chat-session" title="Permanent link"></a></h2>
<p>Generally, the chat session could be switched, which requires the ability of loading and saving session.</p>
<p>The API is also quite simple, the files will be saved into a directory you specified. If the path does not exist, a new directory will be created.</p>
<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span>
<span class="normal">4</span>
<span class="normal">5</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="kt">string</span><span class="w"> </span><span class="n">savePath</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">&quot;&lt;save dir&gt;&quot;</span><span class="p">;</span>
<span class="n">session</span><span class="p">.</span><span class="n">SaveSession</span><span class="p">(</span><span class="n">savePath</span><span class="p">);</span>

<span class="n">session</span><span class="p">.</span><span class="n">LoadSession</span><span class="p">(</span><span class="n">savePath</span><span class="p">,</span><span class="w"> </span><span class="n">loadTransforms</span><span class="p">:</span><span class="k">true</span><span class="p">);</span>
<span class="n">session</span><span class="p">.</span><span class="n">LoadSession</span><span class="p">(</span><span class="n">savePath</span><span class="p">,</span><span class="w"> </span><span class="n">loadTransforms</span><span class="p">:</span><span class="k">false</span><span class="p">);</span>
</code></pre></div></td></tr></table></div>
<p>You could also keep the state in memory and load them with the following APIs.</p>
<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"> 1</span>
<span class="normal"> 2</span>
<span class="normal"> 3</span>
<span class="normal"> 4</span>
<span class="normal"> 5</span>
<span class="normal"> 6</span>
<span class="normal"> 7</span>
<span class="normal"> 8</span>
<span class="normal"> 9</span>
<span class="normal">10</span>
<span class="normal">11</span>
<span class="normal">12</span>
<span class="normal">13</span>
<span class="normal">14</span>
<span class="normal">15</span>
<span class="normal">16</span>
<span class="normal">17</span>
<span class="normal">18</span>
<span class="normal">19</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="kt">var</span><span class="w"> </span><span class="n">sessionState</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">session</span><span class="p">.</span><span class="n">GetSessionState</span><span class="p">();</span>
<span class="n">session</span><span class="p">.</span><span class="n">LoadSession</span><span class="p">(</span><span class="n">sessionState</span><span class="p">,</span><span class="w"> </span><span class="n">loadTransforms</span><span class="p">:</span><span class="k">true</span><span class="p">);</span>
<span class="n">session</span><span class="p">.</span><span class="n">LoadSession</span><span class="p">(</span><span class="n">sessionState</span><span class="p">,</span><span class="w"> </span><span class="n">loadTransforms</span><span class="p">:</span><span class="k">false</span><span class="p">);</span>

<span class="err">##</span><span class="w"> </span><span class="n">Transforms</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">Chat</span><span class="w"> </span><span class="n">Session</span>

<span class="n">There</span><span class="err">&#39;</span><span class="n">s</span><span class="w"> </span><span class="n">three</span><span class="w"> </span><span class="n">important</span><span class="w"> </span><span class="n">elements</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="err">`</span><span class="n">ChatSession</span><span class="err">`</span><span class="p">,</span><span class="w"> </span><span class="n">which</span><span class="w"> </span><span class="n">are</span><span class="w"> </span><span class="n">input</span><span class="p">,</span><span class="w"> </span><span class="n">output</span><span class="w"> </span><span class="n">and</span><span class="w"> </span><span class="n">history</span><span class="p">.</span><span class="w"> </span><span class="n">Besides</span><span class="p">,</span><span class="w"> </span><span class="n">there</span><span class="err">&#39;</span><span class="n">re</span><span class="w"> </span><span class="n">some</span><span class="w"> </span><span class="n">conversions</span><span class="w"> </span><span class="n">between</span><span class="w"> </span><span class="n">them</span><span class="p">.</span><span class="w"> </span><span class="n">Since</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">process</span><span class="w"> </span><span class="n">of</span><span class="w"> </span><span class="n">them</span><span class="w"> </span><span class="n">under</span><span class="w"> </span><span class="n">different</span><span class="w"> </span><span class="n">conditions</span><span class="w"> </span><span class="n">varies</span><span class="p">,</span><span class="w"> </span><span class="n">LLamaSharp</span><span class="w"> </span><span class="n">hands</span><span class="w"> </span><span class="n">over</span><span class="w"> </span><span class="k">this</span><span class="w"> </span><span class="n">part</span><span class="w"> </span><span class="n">of</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">power</span><span class="w"> </span><span class="n">to</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">users</span><span class="p">.</span>

<span class="n">Currently</span><span class="p">,</span><span class="w"> </span><span class="n">there</span><span class="err">&#39;</span><span class="n">re</span><span class="w"> </span><span class="n">three</span><span class="w"> </span><span class="n">kinds</span><span class="w"> </span><span class="n">of</span><span class="w"> </span><span class="n">process</span><span class="w"> </span><span class="n">that</span><span class="w"> </span><span class="n">could</span><span class="w"> </span><span class="n">be</span><span class="w"> </span><span class="n">customized</span><span class="p">,</span><span class="w"> </span><span class="k">as</span><span class="w"> </span><span class="n">introduced</span><span class="w"> </span><span class="n">below</span><span class="p">.</span>

<span class="err">###</span><span class="w"> </span><span class="n">Input</span><span class="w"> </span><span class="n">transform</span>

<span class="n">In</span><span class="w"> </span><span class="n">general</span><span class="p">,</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">input</span><span class="w"> </span><span class="n">of</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">chat</span><span class="w"> </span><span class="n">API</span><span class="w"> </span><span class="k">is</span><span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="n">text</span><span class="w"> </span><span class="p">(</span><span class="n">without</span><span class="w"> </span><span class="n">stream</span><span class="p">),</span><span class="w"> </span><span class="n">therefore</span><span class="w"> </span><span class="err">`</span><span class="n">ChatSession</span><span class="err">`</span><span class="w"> </span><span class="n">processes</span><span class="w"> </span><span class="n">it</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="n">pipeline</span><span class="p">.</span><span class="w"> </span><span class="n">If</span><span class="w"> </span><span class="n">you</span><span class="w"> </span><span class="n">want</span><span class="w"> </span><span class="n">to</span><span class="w"> </span><span class="n">use</span><span class="w"> </span><span class="n">your</span><span class="w"> </span><span class="n">customized</span><span class="w"> </span><span class="n">transform</span><span class="p">,</span><span class="w"> </span><span class="n">you</span><span class="w"> </span><span class="n">need</span><span class="w"> </span><span class="n">to</span><span class="w"> </span><span class="n">define</span><span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="n">transform</span><span class="w"> </span><span class="n">that</span><span class="w"> </span><span class="n">implements</span><span class="w"> </span><span class="err">`</span><span class="n">ITextTransform</span><span class="err">`</span><span class="w"> </span><span class="n">and</span><span class="w"> </span><span class="k">add</span><span class="w"> </span><span class="n">it</span><span class="w"> </span><span class="n">to</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">pipeline</span><span class="w"> </span><span class="n">of</span><span class="w"> </span><span class="err">`</span><span class="n">ChatSession</span><span class="err">`</span><span class="p">.</span>

<span class="err">```</span><span class="n">cs</span>
<span class="k">public</span><span class="w"> </span><span class="k">interface</span><span class="w"> </span><span class="n">ITextTransform</span>
<span class="p">{</span>
<span class="w">    </span><span class="kt">string</span><span class="w"> </span><span class="nf">Transform</span><span class="p">(</span><span class="kt">string</span><span class="w"> </span><span class="n">text</span><span class="p">);</span>
<span class="p">}</span>
</code></pre></div></td></tr></table></div>
<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"> 1</span>
<span class="normal"> 2</span>
<span class="normal"> 3</span>
<span class="normal"> 4</span>
<span class="normal"> 5</span>
<span class="normal"> 6</span>
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<span class="normal">17</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="k">public</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">MyInputTransform1</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">ITextTransform</span>
<span class="p">{</span>
<span class="w">    </span><span class="k">public</span><span class="w"> </span><span class="kt">string</span><span class="w"> </span><span class="nf">Transform</span><span class="p">(</span><span class="kt">string</span><span class="w"> </span><span class="n">text</span><span class="p">)</span>
<span class="w">    </span><span class="p">{</span>
<span class="w">        </span><span class="k">return</span><span class="w"> </span><span class="s">$&quot;Question: {text}\n&quot;</span><span class="p">;</span>
<span class="w">    </span><span class="p">}</span>
<span class="p">}</span>

<span class="k">public</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">MyInputTransform2</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">ITextTransform</span>
<span class="p">{</span>
<span class="w">    </span><span class="k">public</span><span class="w"> </span><span class="kt">string</span><span class="w"> </span><span class="nf">Transform</span><span class="p">(</span><span class="kt">string</span><span class="w"> </span><span class="n">text</span><span class="p">)</span>
<span class="w">    </span><span class="p">{</span>
<span class="w">        </span><span class="k">return</span><span class="w"> </span><span class="n">text</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="s">&quot;Answer: &quot;</span><span class="p">;</span>
<span class="w">    </span><span class="p">}</span>
<span class="p">}</span>

<span class="n">session</span><span class="p">.</span><span class="n">AddInputTransform</span><span class="p">(</span><span class="k">new</span><span class="w"> </span><span class="n">MyInputTransform1</span><span class="p">()).</span><span class="n">AddInputTransform</span><span class="p">(</span><span class="k">new</span><span class="w"> </span><span class="n">MyInputTransform2</span><span class="p">());</span>
</code></pre></div></td></tr></table></div>
<h3 id="output-transform">Output transform<a class="headerlink" href="#output-transform" title="Permanent link"></a></h3>
<p>Different from the input, the output of chat API is a text stream. Therefore you need to process it word by word, instead of getting the full text at once.</p>
<p>The interface of it has an <code>IEnumerable&lt;string&gt;</code> as input, which is actually a yield sequence.</p>
<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span>
<span class="normal">4</span>
<span class="normal">5</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="k">public</span><span class="w"> </span><span class="k">interface</span><span class="w"> </span><span class="n">ITextStreamTransform</span>
<span class="p">{</span>
<span class="w">    </span><span class="n">IEnumerable</span><span class="o">&lt;</span><span class="kt">string</span><span class="o">&gt;</span><span class="w"> </span><span class="n">Transform</span><span class="p">(</span><span class="n">IEnumerable</span><span class="o">&lt;</span><span class="kt">string</span><span class="o">&gt;</span><span class="w"> </span><span class="n">tokens</span><span class="p">);</span>
<span class="w">    </span><span class="n">IAsyncEnumerable</span><span class="o">&lt;</span><span class="kt">string</span><span class="o">&gt;</span><span class="w"> </span><span class="n">TransformAsync</span><span class="p">(</span><span class="n">IAsyncEnumerable</span><span class="o">&lt;</span><span class="kt">string</span><span class="o">&gt;</span><span class="w"> </span><span class="n">tokens</span><span class="p">);</span>
<span class="p">}</span>
</code></pre></div></td></tr></table></div>
<p>When implementing it, you could throw a not-implemented exception in one of them if you only need to use the chat API in synchronously or asynchronously.</p>
<p>Different from the input transform pipeline, the output transform only supports one transform.</p>
<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="n">session</span><span class="p">.</span><span class="n">WithOutputTransform</span><span class="p">(</span><span class="k">new</span><span class="w"> </span><span class="n">MyOutputTransform</span><span class="p">());</span>
</code></pre></div></td></tr></table></div>
<p>Here's an example of how to implement the interface. In this example, the transform detects whether there's some keywords in the response and removes them.</p>
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<span class="normal">83</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="c1">/// &lt;summary&gt;</span>
<span class="c1">/// A text output transform that removes the keywords from the response.</span>
<span class="c1">/// &lt;/summary&gt;</span>
<span class="k">public</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">KeywordTextOutputStreamTransform</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">ITextStreamTransform</span>
<span class="p">{</span>
<span class="w">    </span><span class="n">HashSet</span><span class="o">&lt;</span><span class="kt">string</span><span class="o">&gt;</span><span class="w"> </span><span class="n">_keywords</span><span class="p">;</span>
<span class="w">    </span><span class="kt">int</span><span class="w"> </span><span class="n">_maxKeywordLength</span><span class="p">;</span>
<span class="w">    </span><span class="kt">bool</span><span class="w"> </span><span class="n">_removeAllMatchedTokens</span><span class="p">;</span>

<span class="w">    </span><span class="c1">/// &lt;summary&gt;</span>
<span class="w">    </span><span class="c1">/// </span>
<span class="w">    </span><span class="c1">/// &lt;/summary&gt;</span>
<span class="w">    </span><span class="c1">/// &lt;param name=&quot;keywords&quot;&gt;Keywords that you want to remove from the response.&lt;/param&gt;</span>
<span class="w">    </span><span class="c1">/// &lt;param name=&quot;redundancyLength&quot;&gt;The extra length when searching for the keyword. For example, if your only keyword is &quot;highlight&quot;, </span>
<span class="w">    </span><span class="c1">/// maybe the token you get is &quot;\r\nhighligt&quot;. In this condition, if redundancyLength=0, the token cannot be successfully matched because the length of &quot;\r\nhighligt&quot; (10)</span>
<span class="w">    </span><span class="c1">/// has already exceeded the maximum length of the keywords (8). On the contrary, setting redundancyLengyh &gt;= 2 leads to successful match.</span>
<span class="w">    </span><span class="c1">/// The larger the redundancyLength is, the lower the processing speed. But as an experience, it won&#39;t introduce too much performance impact when redundancyLength &lt;= 5 &lt;/param&gt;</span>
<span class="w">    </span><span class="c1">/// &lt;param name=&quot;removeAllMatchedTokens&quot;&gt;If set to true, when getting a matched keyword, all the related tokens will be removed. Otherwise only the part of keyword will be removed.&lt;/param&gt;</span>
<span class="w">    </span><span class="k">public</span><span class="w"> </span><span class="nf">KeywordTextOutputStreamTransform</span><span class="p">(</span><span class="n">IEnumerable</span><span class="o">&lt;</span><span class="kt">string</span><span class="o">&gt;</span><span class="w"> </span><span class="n">keywords</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">redundancyLength</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">3</span><span class="p">,</span><span class="w"> </span><span class="kt">bool</span><span class="w"> </span><span class="n">removeAllMatchedTokens</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">false</span><span class="p">)</span>
<span class="w">    </span><span class="p">{</span>
<span class="w">        </span><span class="n">_keywords</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="p">(</span><span class="n">keywords</span><span class="p">);</span>
<span class="w">        </span><span class="n">_maxKeywordLength</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">keywords</span><span class="p">.</span><span class="n">Select</span><span class="p">(</span><span class="n">x</span><span class="w"> </span><span class="o">=&gt;</span><span class="w"> </span><span class="n">x</span><span class="p">.</span><span class="n">Length</span><span class="p">).</span><span class="n">Max</span><span class="p">()</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">redundancyLength</span><span class="p">;</span>
<span class="w">        </span><span class="n">_removeAllMatchedTokens</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">removeAllMatchedTokens</span><span class="p">;</span>
<span class="w">    </span><span class="p">}</span>
<span class="w">    </span><span class="c1">/// &lt;inheritdoc /&gt;</span>
<span class="w">    </span><span class="k">public</span><span class="w"> </span><span class="n">IEnumerable</span><span class="o">&lt;</span><span class="kt">string</span><span class="o">&gt;</span><span class="w"> </span><span class="n">Transform</span><span class="p">(</span><span class="n">IEnumerable</span><span class="o">&lt;</span><span class="kt">string</span><span class="o">&gt;</span><span class="w"> </span><span class="n">tokens</span><span class="p">)</span>
<span class="w">    </span><span class="p">{</span>
<span class="w">        </span><span class="kt">var</span><span class="w"> </span><span class="n">window</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Queue</span><span class="o">&lt;</span><span class="kt">string</span><span class="o">&gt;</span><span class="p">();</span>

<span class="w">        </span><span class="k">foreach</span><span class="w"> </span><span class="p">(</span><span class="kt">var</span><span class="w"> </span><span class="n">s</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">tokens</span><span class="p">)</span>
<span class="w">        </span><span class="p">{</span>
<span class="w">            </span><span class="n">window</span><span class="p">.</span><span class="n">Enqueue</span><span class="p">(</span><span class="n">s</span><span class="p">);</span>
<span class="w">            </span><span class="kt">var</span><span class="w"> </span><span class="n">current</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kt">string</span><span class="p">.</span><span class="n">Join</span><span class="p">(</span><span class="s">&quot;&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">window</span><span class="p">);</span>
<span class="w">            </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">_keywords</span><span class="p">.</span><span class="n">Any</span><span class="p">(</span><span class="n">x</span><span class="w"> </span><span class="o">=&gt;</span><span class="w"> </span><span class="n">current</span><span class="p">.</span><span class="n">Contains</span><span class="p">(</span><span class="n">x</span><span class="p">)))</span>
<span class="w">            </span><span class="p">{</span>
<span class="w">                </span><span class="kt">var</span><span class="w"> </span><span class="n">matchedKeyword</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">_keywords</span><span class="p">.</span><span class="n">First</span><span class="p">(</span><span class="n">x</span><span class="w"> </span><span class="o">=&gt;</span><span class="w"> </span><span class="n">current</span><span class="p">.</span><span class="n">Contains</span><span class="p">(</span><span class="n">x</span><span class="p">));</span>
<span class="w">                </span><span class="kt">int</span><span class="w"> </span><span class="n">total</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">window</span><span class="p">.</span><span class="n">Count</span><span class="p">;</span>
<span class="w">                </span><span class="k">for</span><span class="w"> </span><span class="p">(</span><span class="kt">int</span><span class="w"> </span><span class="n">i</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">0</span><span class="p">;</span><span class="w"> </span><span class="n">i</span><span class="w"> </span><span class="o">&lt;</span><span class="w"> </span><span class="n">total</span><span class="p">;</span><span class="w"> </span><span class="n">i</span><span class="o">++</span><span class="p">)</span>
<span class="w">                </span><span class="p">{</span>
<span class="w">                    </span><span class="n">window</span><span class="p">.</span><span class="n">Dequeue</span><span class="p">();</span>
<span class="w">                </span><span class="p">}</span>
<span class="w">                </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="o">!</span><span class="n">_removeAllMatchedTokens</span><span class="p">)</span>
<span class="w">                </span><span class="p">{</span>
<span class="w">                    </span><span class="k">yield</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">current</span><span class="p">.</span><span class="n">Replace</span><span class="p">(</span><span class="n">matchedKeyword</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;&quot;</span><span class="p">);</span>
<span class="w">                </span><span class="p">}</span>
<span class="w">            </span><span class="p">}</span>
<span class="w">            </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">current</span><span class="p">.</span><span class="n">Length</span><span class="w"> </span><span class="o">&gt;=</span><span class="w"> </span><span class="n">_maxKeywordLength</span><span class="p">)</span>
<span class="w">            </span><span class="p">{</span>
<span class="w">                </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">_keywords</span><span class="p">.</span><span class="n">Any</span><span class="p">(</span><span class="n">x</span><span class="w"> </span><span class="o">=&gt;</span><span class="w"> </span><span class="n">current</span><span class="p">.</span><span class="n">Contains</span><span class="p">(</span><span class="n">x</span><span class="p">)))</span>
<span class="w">                </span><span class="p">{</span>
<span class="w">                    </span><span class="kt">var</span><span class="w"> </span><span class="n">matchedKeyword</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">_keywords</span><span class="p">.</span><span class="n">First</span><span class="p">(</span><span class="n">x</span><span class="w"> </span><span class="o">=&gt;</span><span class="w"> </span><span class="n">current</span><span class="p">.</span><span class="n">Contains</span><span class="p">(</span><span class="n">x</span><span class="p">));</span>
<span class="w">                    </span><span class="kt">int</span><span class="w"> </span><span class="n">total</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">window</span><span class="p">.</span><span class="n">Count</span><span class="p">;</span>
<span class="w">                    </span><span class="k">for</span><span class="w"> </span><span class="p">(</span><span class="kt">int</span><span class="w"> </span><span class="n">i</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">0</span><span class="p">;</span><span class="w"> </span><span class="n">i</span><span class="w"> </span><span class="o">&lt;</span><span class="w"> </span><span class="n">total</span><span class="p">;</span><span class="w"> </span><span class="n">i</span><span class="o">++</span><span class="p">)</span>
<span class="w">                    </span><span class="p">{</span>
<span class="w">                        </span><span class="n">window</span><span class="p">.</span><span class="n">Dequeue</span><span class="p">();</span>
<span class="w">                    </span><span class="p">}</span>
<span class="w">                    </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="o">!</span><span class="n">_removeAllMatchedTokens</span><span class="p">)</span>
<span class="w">                    </span><span class="p">{</span>
<span class="w">                        </span><span class="k">yield</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">current</span><span class="p">.</span><span class="n">Replace</span><span class="p">(</span><span class="n">matchedKeyword</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;&quot;</span><span class="p">);</span>
<span class="w">                    </span><span class="p">}</span>
<span class="w">                </span><span class="p">}</span>
<span class="w">                </span><span class="k">else</span>
<span class="w">                </span><span class="p">{</span>
<span class="w">                    </span><span class="kt">int</span><span class="w"> </span><span class="n">total</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">window</span><span class="p">.</span><span class="n">Count</span><span class="p">;</span>
<span class="w">                    </span><span class="k">for</span><span class="w"> </span><span class="p">(</span><span class="kt">int</span><span class="w"> </span><span class="n">i</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">0</span><span class="p">;</span><span class="w"> </span><span class="n">i</span><span class="w"> </span><span class="o">&lt;</span><span class="w"> </span><span class="n">total</span><span class="p">;</span><span class="w"> </span><span class="n">i</span><span class="o">++</span><span class="p">)</span>
<span class="w">                    </span><span class="p">{</span>
<span class="w">                        </span><span class="k">yield</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">window</span><span class="p">.</span><span class="n">Dequeue</span><span class="p">();</span>
<span class="w">                    </span><span class="p">}</span>
<span class="w">                </span><span class="p">}</span>
<span class="w">            </span><span class="p">}</span>
<span class="w">        </span><span class="p">}</span>
<span class="w">        </span><span class="kt">int</span><span class="w"> </span><span class="n">totalCount</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">window</span><span class="p">.</span><span class="n">Count</span><span class="p">;</span>
<span class="w">        </span><span class="k">for</span><span class="w"> </span><span class="p">(</span><span class="kt">int</span><span class="w"> </span><span class="n">i</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">0</span><span class="p">;</span><span class="w"> </span><span class="n">i</span><span class="w"> </span><span class="o">&lt;</span><span class="w"> </span><span class="n">totalCount</span><span class="p">;</span><span class="w"> </span><span class="n">i</span><span class="o">++</span><span class="p">)</span>
<span class="w">        </span><span class="p">{</span>
<span class="w">            </span><span class="k">yield</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">window</span><span class="p">.</span><span class="n">Dequeue</span><span class="p">();</span>
<span class="w">        </span><span class="p">}</span>
<span class="w">    </span><span class="p">}</span>
<span class="w">    </span><span class="c1">/// &lt;inheritdoc /&gt;</span>
<span class="w">    </span><span class="k">public</span><span class="w"> </span><span class="k">async</span><span class="w"> </span><span class="n">IAsyncEnumerable</span><span class="o">&lt;</span><span class="kt">string</span><span class="o">&gt;</span><span class="w"> </span><span class="n">TransformAsync</span><span class="p">(</span><span class="n">IAsyncEnumerable</span><span class="o">&lt;</span><span class="kt">string</span><span class="o">&gt;</span><span class="w"> </span><span class="n">tokens</span><span class="p">)</span>
<span class="w">    </span><span class="p">{</span>
<span class="w">        </span><span class="k">throw</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="nf">NotImplementedException</span><span class="p">();</span><span class="w"> </span><span class="c1">// This is implemented in `LLamaTransforms` but we ignore it here.</span>
<span class="w">    </span><span class="p">}</span>
<span class="p">}</span>
</code></pre></div></td></tr></table></div>
<h3 id="history-transform">History transform<a class="headerlink" href="#history-transform" title="Permanent link"></a></h3>
<p>The chat history could be converted to or from a text, which is exactly what the interface of it.</p>
<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span>
<span class="normal">4</span>
<span class="normal">5</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="k">public</span><span class="w"> </span><span class="k">interface</span><span class="w"> </span><span class="n">IHistoryTransform</span>
<span class="p">{</span>
<span class="w">    </span><span class="kt">string</span><span class="w"> </span><span class="nf">HistoryToText</span><span class="p">(</span><span class="n">ChatHistory</span><span class="w"> </span><span class="n">history</span><span class="p">);</span>
<span class="w">    </span><span class="n">ChatHistory</span><span class="w"> </span><span class="nf">TextToHistory</span><span class="p">(</span><span class="n">AuthorRole</span><span class="w"> </span><span class="n">role</span><span class="p">,</span><span class="w"> </span><span class="kt">string</span><span class="w"> </span><span class="n">text</span><span class="p">);</span>
<span class="p">}</span>
</code></pre></div></td></tr></table></div>
<p>Similar to the output transform, the history transform is added in the following way:</p>
<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="n">session</span><span class="p">.</span><span class="n">WithHistoryTransform</span><span class="p">(</span><span class="k">new</span><span class="w"> </span><span class="n">MyHistoryTransform</span><span class="p">());</span>
</code></pre></div></td></tr></table></div>
<p>The implementation is quite flexible, depending on what you want the history message to be like. Here's an example, which is the default history transform in LLamaSharp.</p>
<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"> 1</span>
<span class="normal"> 2</span>
<span class="normal"> 3</span>
<span class="normal"> 4</span>
<span class="normal"> 5</span>
<span class="normal"> 6</span>
<span class="normal"> 7</span>
<span class="normal"> 8</span>
<span class="normal"> 9</span>
<span class="normal">10</span>
<span class="normal">11</span>
<span class="normal">12</span>
<span class="normal">13</span>
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<span class="normal">76</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="c1">/// &lt;summary&gt;</span>
<span class="c1">/// The default history transform.</span>
<span class="c1">/// Uses plain text with the following format:</span>
<span class="c1">/// [Author]: [Message]</span>
<span class="c1">/// &lt;/summary&gt;</span>
<span class="k">public</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">DefaultHistoryTransform</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">IHistoryTransform</span>
<span class="p">{</span>
<span class="w">    </span><span class="k">private</span><span class="w"> </span><span class="k">readonly</span><span class="w"> </span><span class="kt">string</span><span class="w"> </span><span class="n">defaultUserName</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">&quot;User&quot;</span><span class="p">;</span>
<span class="w">    </span><span class="k">private</span><span class="w"> </span><span class="k">readonly</span><span class="w"> </span><span class="kt">string</span><span class="w"> </span><span class="n">defaultAssistantName</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">&quot;Assistant&quot;</span><span class="p">;</span>
<span class="w">    </span><span class="k">private</span><span class="w"> </span><span class="k">readonly</span><span class="w"> </span><span class="kt">string</span><span class="w"> </span><span class="n">defaultSystemName</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">&quot;System&quot;</span><span class="p">;</span>
<span class="w">    </span><span class="k">private</span><span class="w"> </span><span class="k">readonly</span><span class="w"> </span><span class="kt">string</span><span class="w"> </span><span class="n">defaultUnknownName</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">&quot;??&quot;</span><span class="p">;</span>

<span class="w">    </span><span class="kt">string</span><span class="w"> </span><span class="n">_userName</span><span class="p">;</span>
<span class="w">    </span><span class="kt">string</span><span class="w"> </span><span class="n">_assistantName</span><span class="p">;</span>
<span class="w">    </span><span class="kt">string</span><span class="w"> </span><span class="n">_systemName</span><span class="p">;</span>
<span class="w">    </span><span class="kt">string</span><span class="w"> </span><span class="n">_unknownName</span><span class="p">;</span>
<span class="w">    </span><span class="kt">bool</span><span class="w"> </span><span class="n">_isInstructMode</span><span class="p">;</span>
<span class="w">    </span><span class="k">public</span><span class="w"> </span><span class="nf">DefaultHistoryTransform</span><span class="p">(</span><span class="kt">string?</span><span class="w"> </span><span class="n">userName</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">null</span><span class="p">,</span><span class="w"> </span><span class="kt">string?</span><span class="w"> </span><span class="n">assistantName</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">null</span><span class="p">,</span><span class="w"> </span>
<span class="w">        </span><span class="kt">string?</span><span class="w"> </span><span class="n">systemName</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">null</span><span class="p">,</span><span class="w"> </span><span class="kt">string?</span><span class="w"> </span><span class="n">unknownName</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">null</span><span class="p">,</span><span class="w"> </span><span class="kt">bool</span><span class="w"> </span><span class="n">isInstructMode</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">false</span><span class="p">)</span>
<span class="w">    </span><span class="p">{</span>
<span class="w">        </span><span class="n">_userName</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">userName</span><span class="w"> </span><span class="o">??</span><span class="w"> </span><span class="n">defaultUserName</span><span class="p">;</span>
<span class="w">        </span><span class="n">_assistantName</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">assistantName</span><span class="w"> </span><span class="o">??</span><span class="w"> </span><span class="n">defaultAssistantName</span><span class="p">;</span>
<span class="w">        </span><span class="n">_systemName</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">systemName</span><span class="w"> </span><span class="o">??</span><span class="w"> </span><span class="n">defaultSystemName</span><span class="p">;</span>
<span class="w">        </span><span class="n">_unknownName</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">unknownName</span><span class="w"> </span><span class="o">??</span><span class="w"> </span><span class="n">defaultUnknownName</span><span class="p">;</span>
<span class="w">        </span><span class="n">_isInstructMode</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">isInstructMode</span><span class="p">;</span>
<span class="w">    </span><span class="p">}</span>

<span class="w">    </span><span class="k">public</span><span class="w"> </span><span class="k">virtual</span><span class="w"> </span><span class="kt">string</span><span class="w"> </span><span class="nf">HistoryToText</span><span class="p">(</span><span class="n">ChatHistory</span><span class="w"> </span><span class="n">history</span><span class="p">)</span>
<span class="w">    </span><span class="p">{</span>
<span class="w">        </span><span class="n">StringBuilder</span><span class="w"> </span><span class="n">sb</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="p">();</span>
<span class="w">        </span><span class="k">foreach</span><span class="w"> </span><span class="p">(</span><span class="kt">var</span><span class="w"> </span><span class="n">message</span><span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="n">history</span><span class="p">.</span><span class="n">Messages</span><span class="p">)</span>
<span class="w">        </span><span class="p">{</span>
<span class="w">            </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">message</span><span class="p">.</span><span class="n">AuthorRole</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">AuthorRole</span><span class="p">.</span><span class="n">User</span><span class="p">)</span>
<span class="w">            </span><span class="p">{</span>
<span class="w">                </span><span class="n">sb</span><span class="p">.</span><span class="n">AppendLine</span><span class="p">(</span><span class="s">$&quot;{_userName}: {message.Content}&quot;</span><span class="p">);</span>
<span class="w">            </span><span class="p">}</span>
<span class="w">            </span><span class="k">else</span><span class="w"> </span><span class="nf">if</span><span class="w"> </span><span class="p">(</span><span class="n">message</span><span class="p">.</span><span class="n">AuthorRole</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">AuthorRole</span><span class="p">.</span><span class="n">System</span><span class="p">)</span>
<span class="w">            </span><span class="p">{</span>
<span class="w">                </span><span class="n">sb</span><span class="p">.</span><span class="n">AppendLine</span><span class="p">(</span><span class="s">$&quot;{_systemName}: {message.Content}&quot;</span><span class="p">);</span>
<span class="w">            </span><span class="p">}</span>
<span class="w">            </span><span class="k">else</span><span class="w"> </span><span class="nf">if</span><span class="w"> </span><span class="p">(</span><span class="n">message</span><span class="p">.</span><span class="n">AuthorRole</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">AuthorRole</span><span class="p">.</span><span class="n">Unknown</span><span class="p">)</span>
<span class="w">            </span><span class="p">{</span>
<span class="w">                </span><span class="n">sb</span><span class="p">.</span><span class="n">AppendLine</span><span class="p">(</span><span class="s">$&quot;{_unknownName}: {message.Content}&quot;</span><span class="p">);</span>
<span class="w">            </span><span class="p">}</span>
<span class="w">            </span><span class="k">else</span><span class="w"> </span><span class="nf">if</span><span class="w"> </span><span class="p">(</span><span class="n">message</span><span class="p">.</span><span class="n">AuthorRole</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">AuthorRole</span><span class="p">.</span><span class="n">Assistant</span><span class="p">)</span>
<span class="w">            </span><span class="p">{</span>
<span class="w">                </span><span class="n">sb</span><span class="p">.</span><span class="n">AppendLine</span><span class="p">(</span><span class="s">$&quot;{_assistantName}: {message.Content}&quot;</span><span class="p">);</span>
<span class="w">            </span><span class="p">}</span>
<span class="w">        </span><span class="p">}</span>
<span class="w">        </span><span class="k">return</span><span class="w"> </span><span class="n">sb</span><span class="p">.</span><span class="n">ToString</span><span class="p">();</span>
<span class="w">    </span><span class="p">}</span>

<span class="w">    </span><span class="k">public</span><span class="w"> </span><span class="k">virtual</span><span class="w"> </span><span class="n">ChatHistory</span><span class="w"> </span><span class="nf">TextToHistory</span><span class="p">(</span><span class="n">AuthorRole</span><span class="w"> </span><span class="n">role</span><span class="p">,</span><span class="w"> </span><span class="kt">string</span><span class="w"> </span><span class="n">text</span><span class="p">)</span>
<span class="w">    </span><span class="p">{</span>
<span class="w">        </span><span class="n">ChatHistory</span><span class="w"> </span><span class="n">history</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">ChatHistory</span><span class="p">();</span>
<span class="w">        </span><span class="n">history</span><span class="p">.</span><span class="n">AddMessage</span><span class="p">(</span><span class="n">role</span><span class="p">,</span><span class="w"> </span><span class="n">TrimNamesFromText</span><span class="p">(</span><span class="n">text</span><span class="p">,</span><span class="w"> </span><span class="n">role</span><span class="p">));</span>
<span class="w">        </span><span class="k">return</span><span class="w"> </span><span class="n">history</span><span class="p">;</span>
<span class="w">    </span><span class="p">}</span>

<span class="w">    </span><span class="k">public</span><span class="w"> </span><span class="k">virtual</span><span class="w"> </span><span class="kt">string</span><span class="w"> </span><span class="nf">TrimNamesFromText</span><span class="p">(</span><span class="kt">string</span><span class="w"> </span><span class="n">text</span><span class="p">,</span><span class="w"> </span><span class="n">AuthorRole</span><span class="w"> </span><span class="n">role</span><span class="p">)</span>
<span class="w">    </span><span class="p">{</span>
<span class="w">        </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">role</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">AuthorRole</span><span class="p">.</span><span class="n">User</span><span class="w"> </span><span class="o">&amp;&amp;</span><span class="w"> </span><span class="n">text</span><span class="p">.</span><span class="n">StartsWith</span><span class="p">(</span><span class="s">$&quot;{_userName}:&quot;</span><span class="p">))</span>
<span class="w">        </span><span class="p">{</span>
<span class="w">            </span><span class="n">text</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">text</span><span class="p">.</span><span class="n">Substring</span><span class="p">(</span><span class="s">$&quot;{_userName}:&quot;</span><span class="p">.</span><span class="n">Length</span><span class="p">).</span><span class="n">TrimStart</span><span class="p">();</span>
<span class="w">        </span><span class="p">}</span>
<span class="w">        </span><span class="k">else</span><span class="w"> </span><span class="nf">if</span><span class="w"> </span><span class="p">(</span><span class="n">role</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">AuthorRole</span><span class="p">.</span><span class="n">Assistant</span><span class="w"> </span><span class="o">&amp;&amp;</span><span class="w"> </span><span class="n">text</span><span class="p">.</span><span class="n">EndsWith</span><span class="p">(</span><span class="s">$&quot;{_assistantName}:&quot;</span><span class="p">))</span>
<span class="w">        </span><span class="p">{</span>
<span class="w">            </span><span class="n">text</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">text</span><span class="p">.</span><span class="n">Substring</span><span class="p">(</span><span class="m">0</span><span class="p">,</span><span class="w"> </span><span class="n">text</span><span class="p">.</span><span class="n">Length</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="s">$&quot;{_assistantName}:&quot;</span><span class="p">.</span><span class="n">Length</span><span class="p">).</span><span class="n">TrimEnd</span><span class="p">();</span>
<span class="w">        </span><span class="p">}</span>
<span class="w">        </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">_isInstructMode</span><span class="w"> </span><span class="o">&amp;&amp;</span><span class="w"> </span><span class="n">role</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">AuthorRole</span><span class="p">.</span><span class="n">Assistant</span><span class="w"> </span><span class="o">&amp;&amp;</span><span class="w"> </span><span class="n">text</span><span class="p">.</span><span class="n">EndsWith</span><span class="p">(</span><span class="s">&quot;\n&gt; &quot;</span><span class="p">))</span>
<span class="w">        </span><span class="p">{</span>
<span class="w">            </span><span class="n">text</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">text</span><span class="p">.</span><span class="n">Substring</span><span class="p">(</span><span class="m">0</span><span class="p">,</span><span class="w"> </span><span class="n">text</span><span class="p">.</span><span class="n">Length</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="s">&quot;\n&gt; &quot;</span><span class="p">.</span><span class="n">Length</span><span class="p">).</span><span class="n">TrimEnd</span><span class="p">();</span>
<span class="w">        </span><span class="p">}</span>
<span class="w">        </span><span class="k">return</span><span class="w"> </span><span class="n">text</span><span class="p">;</span>
<span class="w">    </span><span class="p">}</span>
<span class="p">}</span>
</code></pre></div></td></tr></table></div>


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