diff --git a/host/tests/it/chat.rs b/host/tests/it/chat.rs
index f1047fd..0818ea3 100644
--- a/host/tests/it/chat.rs
+++ b/host/tests/it/chat.rs
@@ -31,6 +31,35 @@ async fn request(port: u16, path: &str, body: Option<&str>) -> anyhow::Result<(u
     let status = header.split_whitespace().nth(1).unwrap().parse()?;
     Ok((status, bytes[end..].to_vec()))
 }
+#[test]
+fn page_rendering() -> anyhow::Result<()> {
+    let source = Path::new(env!("CARGO_MANIFEST_DIR")).join("../userland/chat");
+    let page = std::fs::read_to_string(source.join("index.html"))?;
+    let script = page
+        .split_once("<script>")
+        .unwrap()
+        .1
+        .split_once("</script>")
+        .unwrap()
+        .0;
+    let dir = tempfile::tempdir()?;
+    let extracted = dir.path().join("chat.js");
+    std::fs::write(&extracted, script)?;
+    let fixture = source.join("render.test.cjs");
+    for args in [
+        [Path::new("--check"), extracted.as_path()],
+        [fixture.as_path(), extracted.as_path()],
+    ] {
+        let output = std::process::Command::new("node").args(args).output()?;
+        anyhow::ensure!(
+            output.status.success(),
+            "Page script: {}",
+            String::from_utf8_lossy(&output.stderr)
+        );
+    }
+    Ok(())
+}
+
 #[tokio::test(flavor = "current_thread")]
 async fn seeded_chat() -> anyhow::Result<()> {
     seeded_chat_case(false).await
diff --git a/userland/chat/index.html b/userland/chat/index.html
index 4bc94e6..22d0632 100644
--- a/userland/chat/index.html
+++ b/userland/chat/index.html
@@ -3,13 +3,49 @@
 <title>Sausage chat</title>
 <style>
 body{font:16px system-ui;margin:0;color:#202124;background:#fafafa}header{padding:1rem;border-bottom:1px solid #ccc}main{display:flex;height:calc(100dvh - 5rem)}nav{width:16rem;overflow:auto;padding:.6rem;border-right:1px solid #ccc}button,textarea{font:inherit}button{cursor:pointer;padding:.5rem}nav button{display:block;width:100%;text-align:left;margin-bottom:.4rem}button[aria-current=true]{background:#dceaff}section{flex:1;min-width:0;display:flex;flex-direction:column;padding:1rem}#entries{flex:1;overflow:auto;white-space:pre-wrap;overflow-wrap:anywhere}.entry{padding:.7rem;border-bottom:1px solid #ddd}.user{background:#eef4ff}pre{white-space:pre-wrap;overflow-wrap:anywhere}form{display:flex;gap:.5rem;padding-top:1rem}textarea{flex:1;min-width:0}#approvals{background:#fff1c1}#error{color:#a00}small{display:block}a{margin-right:1rem}@media(max-width:600px){nav{width:8rem}section{padding:.5rem}form{flex-wrap:wrap}}
+.markdown{white-space:normal}.markdown pre,.markdown code,.tool pre{font-family:ui-monospace,monospace}.markdown pre,.tool pre{background:#f0f0f0;padding:.6rem}.markdown table{border-collapse:collapse}.markdown th,.markdown td{border:1px solid #ccc;padding:.4rem}.markdown a{margin-right:0}.thinking{display:block;color:#666;font-style:italic;white-space:pre-wrap}.tool{border:1px solid #ccc;border-radius:.4rem;padding:.6rem;margin:.6rem 0;white-space:normal}.tool.error{border-color:#b33}.tool.error summary{color:#a00}.tool summary{cursor:pointer}.tool pre{margin:.4rem 0}
 </style>
 <header><strong>Sausage chat</strong><span id="error" role="status"></span><div id="approvals" aria-live="polite"></div></header>
-<main><nav id="conversations" aria-label="Conversations"></nav><section><h1 id="title">Conversation</h1><div id="entries" role="log" aria-live="polite"></div><form id="compose"><textarea id="input" aria-label="Message" rows="3" required></textarea><button>Send</button><button id="stop" type="button">Stop</button></form></section></main>
+<main><nav id="conversations" aria-label="Conversations"></nav><section><h1 id="title">Conversation</h1><div id="entries" role="log" aria-live="polite"></div><form id="compose"><textarea id="input" aria-label="Message" aria-keyshortcuts="Control+Enter Meta+Enter" title="Enter inserts a newline. Ctrl+Enter or Cmd+Enter sends." rows="3" required></textarea><button>Send</button><button id="stop" type="button">Stop</button></form></section></main>
 <script>
+/* Vendored Marked 15.0.12, MIT. See marked-LICENSE.md. */
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+ * Minified by jsDelivr using Terser v5.39.0.
+ * Original file: /npm/marked@15.0.12/lib/marked.umd.js
+ *
+ * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files
+ */
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s.length>=r.length?e.slice(r.length):e})).join("\n")}(e,t[3]||"",this.rules);return{type:"code",raw:e,lang:t[2]?t[2].trim().replace(this.rules.inline.anyPunctuation,"$1"):t[2],text:n}}}heading(e){const t=this.rules.block.heading.exec(e);if(t){let e=t[2].trim();if(this.rules.other.endingHash.test(e)){const t=he(e,"#");this.options.pedantic?e=t.trim():t&&!this.rules.other.endingSpaceChar.test(t)||(e=t.trim())}return{type:"heading",raw:t[0],depth:t[1].length,text:e,tokens:this.lexer.inline(e)}}}hr(e){const t=this.rules.block.hr.exec(e);if(t)return{type:"hr",raw:he(t[0],"\n")}}blockquote(e){const t=this.rules.block.blockquote.exec(e);if(t){let e=he(t[0],"\n").split("\n"),n="",s="";const r=[];for(;e.length>0;){let t=!1;const i=[];let l;for(l=0;l<e.length;l++)if(this.rules.other.blockquoteStart.test(e[l]))i.push(e[l]),t=!0;else{if(t)break;i.push(e[l])}e=e.slice(l);const o=i.join("\n"),a=o.replace(this.rules.other.blockquoteSetextReplace,"\n    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t=r.items[e].tokens.filter((e=>"space"===e.type)),n=t.length>0&&t.some((e=>this.rules.other.anyLine.test(e.raw)));r.loose=n}if(r.loose)for(let e=0;e<r.items.length;e++)r.items[e].loose=!0;return r}}html(e){const t=this.rules.block.html.exec(e);if(t){return{type:"html",block:!0,raw:t[0],pre:"pre"===t[1]||"script"===t[1]||"style"===t[1],text:t[0]}}}def(e){const t=this.rules.block.def.exec(e);if(t){const e=t[1].toLowerCase().replace(this.rules.other.multipleSpaceGlobal," "),n=t[2]?t[2].replace(this.rules.other.hrefBrackets,"$1").replace(this.rules.inline.anyPunctuation,"$1"):"",s=t[3]?t[3].substring(1,t[3].length-1).replace(this.rules.inline.anyPunctuation,"$1"):t[3];return{type:"def",tag:e,raw:t[0],href:n,title:s}}}table(e){const t=this.rules.block.table.exec(e);if(!t)return;if(!this.rules.other.tableDelimiter.test(t[2]))return;const n=ce(t[1]),s=t[2].replace(this.rules.other.tableAlignChars,"").split("|"),r=t[3]?.trim()?t[3].replace(this.rules.other.tableRowBlankLine,"").split("\n"):[],i={type:"table",raw:t[0],header:[],align:[],rows:[]};if(n.length===s.length){for(const e of s)this.rules.other.tableAlignRight.test(e)?i.align.push("right"):this.rules.other.tableAlignCenter.test(e)?i.align.push("center"):this.rules.other.tableAlignLeft.test(e)?i.align.push("left"):i.align.push(null);for(let e=0;e<n.length;e++)i.header.push({text:n[e],tokens:this.lexer.inline(n[e]),header:!0,align:i.align[e]});for(const e of r)i.rows.push(ce(e,i.header.length).map(((e,t)=>({text:e,tokens:this.lexer.inline(e),header:!1,align:i.align[t]}))));return i}}lheading(e){const t=this.rules.block.lheading.exec(e);if(t)return{type:"heading",raw:t[0],depth:"="===t[2].charAt(0)?1:2,text:t[1],tokens:this.lexer.inline(t[1])}}paragraph(e){const t=this.rules.block.paragraph.exec(e);if(t){const e="\n"===t[1].charAt(t[1].length-1)?t[1].slice(0,-1):t[1];return{type:"paragraph",raw:t[0],text:e,tokens:this.lexer.inline(e)}}}text(e){const t=this.rules.block.text.exec(e);if(t)return{type:"text",raw:t[0],text:t[0],tokens:this.lexer.inline(t[0])}}escape(e){const t=this.rules.inline.escape.exec(e);if(t)return{type:"escape",raw:t[0],text:t[1]}}tag(e){const t=this.rules.inline.tag.exec(e);if(t)return!this.lexer.state.inLink&&this.rules.other.startATag.test(t[0])?this.lexer.state.inLink=!0:this.lexer.state.inLink&&this.rules.other.endATag.test(t[0])&&(this.lexer.state.inLink=!1),!this.lexer.state.inRawBlock&&this.rules.other.startPreScriptTag.test(t[0])?this.lexer.state.inRawBlock=!0:this.lexer.state.inRawBlock&&this.rules.other.endPreScriptTag.test(t[0])&&(this.lexer.state.inRawBlock=!1),{type:"html",raw:t[0],inLink:this.lexer.state.inLink,inRawBlock:this.lexer.state.inRawBlock,block:!1,text:t[0]}}link(e){const t=this.rules.inline.link.exec(e);if(t){const e=t[2].trim();if(!this.options.pedantic&&this.rules.other.startAngleBracket.test(e)){if(!this.rules.other.endAngleBracket.test(e))return;const t=he(e.slice(0,-1),"\\");if((e.length-t.length)%2==0)return}else{const e=function(e,t){if(-1===e.indexOf(t[1]))return-1;let n=0;for(let s=0;s<e.length;s++)if("\\"===e[s])s++;else if(e[s]===t[0])n++;else if(e[s]===t[1]&&(n--,n<0))return s;return n>0?-2:-1}(t[2],"()");if(-2===e)return;if(e>-1){const n=(0===t[0].indexOf("!")?5:4)+t[1].length+e;t[2]=t[2].substring(0,e),t[0]=t[0].substring(0,n).trim(),t[3]=""}}let n=t[2],s="";if(this.options.pedantic){const e=this.rules.other.pedanticHrefTitle.exec(n);e&&(n=e[1],s=e[3])}else s=t[3]?t[3].slice(1,-1):"";return n=n.trim(),this.rules.other.startAngleBracket.test(n)&&(n=this.options.pedantic&&!this.rules.other.endAngleBracket.test(e)?n.slice(1):n.slice(1,-1)),pe(t,{href:n?n.replace(this.rules.inline.anyPunctuation,"$1"):n,title:s?s.replace(this.rules.inline.anyPunctuation,"$1"):s},t[0],this.lexer,this.rules)}}reflink(e,t){let n;if((n=this.rules.inline.reflink.exec(e))||(n=this.rules.inline.nolink.exec(e))){const e=t[(n[2]||n[1]).replace(this.rules.other.multipleSpaceGlobal," ").toLowerCase()];if(!e){const e=n[0].charAt(0);return{type:"text",raw:e,text:e}}return pe(n,e,n[0],this.lexer,this.rules)}}emStrong(e,t,n=""){let s=this.rules.inline.emStrongLDelim.exec(e);if(!s)return;if(s[3]&&n.match(this.rules.other.unicodeAlphaNumeric))return;if(!(s[1]||s[2]||"")||!n||this.rules.inline.punctuation.exec(n)){const n=[...s[0]].length-1;let r,i,l=n,o=0;const a="*"===s[0][0]?this.rules.inline.emStrongRDelimAst:this.rules.inline.emStrongRDelimUnd;for(a.lastIndex=0,t=t.slice(-1*e.length+n);null!=(s=a.exec(t));){if(r=s[1]||s[2]||s[3]||s[4]||s[5]||s[6],!r)continue;if(i=[...r].length,s[3]||s[4]){l+=i;continue}if((s[5]||s[6])&&n%3&&!((n+i)%3)){o+=i;continue}if(l-=i,l>0)continue;i=Math.min(i,i+l+o);const t=[...s[0]][0].length,a=e.slice(0,n+s.index+t+i);if(Math.min(n,i)%2){const e=a.slice(1,-1);return{type:"em",raw:a,text:e,tokens:this.lexer.inlineTokens(e)}}const c=a.slice(2,-2);return{type:"strong",raw:a,text:c,tokens:this.lexer.inlineTokens(c)}}}}codespan(e){const t=this.rules.inline.code.exec(e);if(t){let e=t[2].replace(this.rules.other.newLineCharGlobal," ");const n=this.rules.other.nonSpaceChar.test(e),s=this.rules.other.startingSpaceChar.test(e)&&this.rules.other.endingSpaceChar.test(e);return n&&s&&(e=e.substring(1,e.length-1)),{type:"codespan",raw:t[0],text:e}}}br(e){const t=this.rules.inline.br.exec(e);if(t)return{type:"br",raw:t[0]}}del(e){const t=this.rules.inline.del.exec(e);if(t)return{type:"del",raw:t[0],text:t[2],tokens:this.lexer.inlineTokens(t[2])}}autolink(e){const t=this.rules.inline.autolink.exec(e);if(t){let e,n;return"@"===t[2]?(e=t[1],n="mailto:"+e):(e=t[1],n=e),{type:"link",raw:t[0],text:e,href:n,tokens:[{type:"text",raw:e,text:e}]}}}url(e){let t;if(t=this.rules.inline.url.exec(e)){let e,n;if("@"===t[2])e=t[0],n="mailto:"+e;else{let s;do{s=t[0],t[0]=this.rules.inline._backpedal.exec(t[0])?.[0]??""}while(s!==t[0]);e=t[0],n="www."===t[1]?"http://"+t[0]:t[0]}return{type:"link",raw:t[0],text:e,href:n,tokens:[{type:"text",raw:e,text:e}]}}}inlineText(e){const t=this.rules.inline.text.exec(e);if(t){const e=this.lexer.state.inRawBlock;return{type:"text",raw:t[0],text:t[0],escaped:e}}}},ge=class e{tokens;options;state;tokenizer;inlineQueue;constructor(e){this.tokens=[],this.tokens.links=Object.create(null),this.options=e||h,this.options.tokenizer=this.options.tokenizer||new ue,this.tokenizer=this.options.tokenizer,this.tokenizer.options=this.options,this.tokenizer.lexer=this,this.inlineQueue=[],this.state={inLink:!1,inRawBlock:!1,top:!0};const t={other:k,block:se.normal,inline:re.normal};this.options.pedantic?(t.block=se.pedantic,t.inline=re.pedantic):this.options.gfm&&(t.block=se.gfm,this.options.breaks?t.inline=re.breaks:t.inline=re.gfm),this.tokenizer.rules=t}static get rules(){return{block:se,inline:re}}static lex(t,n){return new e(n).lex(t)}static lexInline(t,n){return new e(n).inlineTokens(t)}lex(e){e=e.replace(k.carriageReturn,"\n"),this.blockTokens(e,this.tokens);for(let e=0;e<this.inlineQueue.length;e++){const t=this.inlineQueue[e];this.inlineTokens(t.src,t.tokens)}return this.inlineQueue=[],this.tokens}blockTokens(e,t=[],n=!1){for(this.options.pedantic&&(e=e.replace(k.tabCharGlobal,"    ").replace(k.spaceLine,""));e;){let s;if(this.options.extensions?.block?.some((n=>!!(s=n.call({lexer:this},e,t))&&(e=e.substring(s.raw.length),t.push(s),!0))))continue;if(s=this.tokenizer.space(e)){e=e.substring(s.raw.length);const n=t.at(-1);1===s.raw.length&&void 0!==n?n.raw+="\n":t.push(s);continue}if(s=this.tokenizer.code(e)){e=e.substring(s.raw.length);const n=t.at(-1);"paragraph"===n?.type||"text"===n?.type?(n.raw+="\n"+s.raw,n.text+="\n"+s.text,this.inlineQueue.at(-1).src=n.text):t.push(s);continue}if(s=this.tokenizer.fences(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.heading(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.hr(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.blockquote(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.list(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.html(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.def(e)){e=e.substring(s.raw.length);const n=t.at(-1);"paragraph"===n?.type||"text"===n?.type?(n.raw+="\n"+s.raw,n.text+="\n"+s.raw,this.inlineQueue.at(-1).src=n.text):this.tokens.links[s.tag]||(this.tokens.links[s.tag]={href:s.href,title:s.title});continue}if(s=this.tokenizer.table(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.lheading(e)){e=e.substring(s.raw.length),t.push(s);continue}let r=e;if(this.options.extensions?.startBlock){let t=1/0;const n=e.slice(1);let s;this.options.extensions.startBlock.forEach((e=>{s=e.call({lexer:this},n),"number"==typeof s&&s>=0&&(t=Math.min(t,s))})),t<1/0&&t>=0&&(r=e.substring(0,t+1))}if(this.state.top&&(s=this.tokenizer.paragraph(r))){const i=t.at(-1);n&&"paragraph"===i?.type?(i.raw+="\n"+s.raw,i.text+="\n"+s.text,this.inlineQueue.pop(),this.inlineQueue.at(-1).src=i.text):t.push(s),n=r.length!==e.length,e=e.substring(s.raw.length)}else if(s=this.tokenizer.text(e)){e=e.substring(s.raw.length);const n=t.at(-1);"text"===n?.type?(n.raw+="\n"+s.raw,n.text+="\n"+s.text,this.inlineQueue.pop(),this.inlineQueue.at(-1).src=n.text):t.push(s)}else if(e){const t="Infinite loop on byte: "+e.charCodeAt(0);if(this.options.silent){console.error(t);break}throw new Error(t)}}return this.state.top=!0,t}inline(e,t=[]){return this.inlineQueue.push({src:e,tokens:t}),t}inlineTokens(e,t=[]){let n=e,s=null;if(this.tokens.links){const e=Object.keys(this.tokens.links);if(e.length>0)for(;null!=(s=this.tokenizer.rules.inline.reflinkSearch.exec(n));)e.includes(s[0].slice(s[0].lastIndexOf("[")+1,-1))&&(n=n.slice(0,s.index)+"["+"a".repeat(s[0].length-2)+"]"+n.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex))}for(;null!=(s=this.tokenizer.rules.inline.anyPunctuation.exec(n));)n=n.slice(0,s.index)+"++"+n.slice(this.tokenizer.rules.inline.anyPunctuation.lastIndex);for(;null!=(s=this.tokenizer.rules.inline.blockSkip.exec(n));)n=n.slice(0,s.index)+"["+"a".repeat(s[0].length-2)+"]"+n.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);let r=!1,i="";for(;e;){let s;if(r||(i=""),r=!1,this.options.extensions?.inline?.some((n=>!!(s=n.call({lexer:this},e,t))&&(e=e.substring(s.raw.length),t.push(s),!0))))continue;if(s=this.tokenizer.escape(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.tag(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.link(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.reflink(e,this.tokens.links)){e=e.substring(s.raw.length);const n=t.at(-1);"text"===s.type&&"text"===n?.type?(n.raw+=s.raw,n.text+=s.text):t.push(s);continue}if(s=this.tokenizer.emStrong(e,n,i)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.codespan(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.br(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.del(e)){e=e.substring(s.raw.length),t.push(s);continue}if(s=this.tokenizer.autolink(e)){e=e.substring(s.raw.length),t.push(s);continue}if(!this.state.inLink&&(s=this.tokenizer.url(e))){e=e.substring(s.raw.length),t.push(s);continue}let l=e;if(this.options.extensions?.startInline){let t=1/0;const n=e.slice(1);let s;this.options.extensions.startInline.forEach((e=>{s=e.call({lexer:this},n),"number"==typeof s&&s>=0&&(t=Math.min(t,s))})),t<1/0&&t>=0&&(l=e.substring(0,t+1))}if(s=this.tokenizer.inlineText(l)){e=e.substring(s.raw.length),"_"!==s.raw.slice(-1)&&(i=s.raw.slice(-1)),r=!0;const n=t.at(-1);"text"===n?.type?(n.raw+=s.raw,n.text+=s.text):t.push(s)}else if(e){const t="Infinite loop on byte: "+e.charCodeAt(0);if(this.options.silent){console.error(t);break}throw new Error(t)}}return t}},ke=class{options;parser;constructor(e){this.options=e||h}space(e){return""}code({text:e,lang:t,escaped:n}){const s=(t||"").match(k.notSpaceStart)?.[0],r=e.replace(k.endingNewline,"")+"\n";return s?'<pre><code class="language-'+oe(s)+'">'+(n?r:oe(r,!0))+"</code></pre>\n":"<pre><code>"+(n?r:oe(r,!0))+"</code></pre>\n"}blockquote({tokens:e}){return`<blockquote>\n${this.parser.parse(e)}</blockquote>\n`}html({text:e}){return e}heading({tokens:e,depth:t}){return`<h${t}>${this.parser.parseInline(e)}</h${t}>\n`}hr(e){return"<hr>\n"}list(e){const t=e.ordered,n=e.start;let s="";for(let t=0;t<e.items.length;t++){const n=e.items[t];s+=this.listitem(n)}const r=t?"ol":"ul";return"<"+r+(t&&1!==n?' start="'+n+'"':"")+">\n"+s+"</"+r+">\n"}listitem(e){let t="";if(e.task){const n=this.checkbox({checked:!!e.checked});e.loose?"paragraph"===e.tokens[0]?.type?(e.tokens[0].text=n+" "+e.tokens[0].text,e.tokens[0].tokens&&e.tokens[0].tokens.length>0&&"text"===e.tokens[0].tokens[0].type&&(e.tokens[0].tokens[0].text=n+" "+oe(e.tokens[0].tokens[0].text),e.tokens[0].tokens[0].escaped=!0)):e.tokens.unshift({type:"text",raw:n+" ",text:n+" ",escaped:!0}):t+=n+" "}return t+=this.parser.parse(e.tokens,!!e.loose),`<li>${t}</li>\n`}checkbox({checked:e}){return"<input "+(e?'checked="" ':"")+'disabled="" type="checkbox">'}paragraph({tokens:e}){return`<p>${this.parser.parseInline(e)}</p>\n`}table(e){let t="",n="";for(let t=0;t<e.header.length;t++)n+=this.tablecell(e.header[t]);t+=this.tablerow({text:n});let s="";for(let t=0;t<e.rows.length;t++){const r=e.rows[t];n="";for(let e=0;e<r.length;e++)n+=this.tablecell(r[e]);s+=this.tablerow({text:n})}return s&&(s=`<tbody>${s}</tbody>`),"<table>\n<thead>\n"+t+"</thead>\n"+s+"</table>\n"}tablerow({text:e}){return`<tr>\n${e}</tr>\n`}tablecell(e){const t=this.parser.parseInline(e.tokens),n=e.header?"th":"td";return(e.align?`<${n} align="${e.align}">`:`<${n}>`)+t+`</${n}>\n`}strong({tokens:e}){return`<strong>${this.parser.parseInline(e)}</strong>`}em({tokens:e}){return`<em>${this.parser.parseInline(e)}</em>`}codespan({text:e}){return`<code>${oe(e,!0)}</code>`}br(e){return"<br>"}del({tokens:e}){return`<del>${this.parser.parseInline(e)}</del>`}link({href:e,title:t,tokens:n}){const s=this.parser.parseInline(n),r=ae(e);if(null===r)return s;let i='<a href="'+(e=r)+'"';return t&&(i+=' title="'+oe(t)+'"'),i+=">"+s+"</a>",i}image({href:e,title:t,text:n,tokens:s}){s&&(n=this.parser.parseInline(s,this.parser.textRenderer));const r=ae(e);if(null===r)return oe(n);let i=`<img src="${e=r}" alt="${n}"`;return t&&(i+=` title="${oe(t)}"`),i+=">",i}text(e){return"tokens"in e&&e.tokens?this.parser.parseInline(e.tokens):"escaped"in e&&e.escaped?e.text:oe(e.text)}},fe=class{strong({text:e}){return e}em({text:e}){return e}codespan({text:e}){return e}del({text:e}){return e}html({text:e}){return e}text({text:e}){return e}link({text:e}){return""+e}image({text:e}){return""+e}br(){return""}},de=class e{options;renderer;textRenderer;constructor(e){this.options=e||h,this.options.renderer=this.options.renderer||new ke,this.renderer=this.options.renderer,this.renderer.options=this.options,this.renderer.parser=this,this.textRenderer=new fe}static parse(t,n){return new e(n).parse(t)}static parseInline(t,n){return new e(n).parseInline(t)}parse(e,t=!0){let n="";for(let s=0;s<e.length;s++){const r=e[s];if(this.options.extensions?.renderers?.[r.type]){const e=r,t=this.options.extensions.renderers[e.type].call({parser:this},e);if(!1!==t||!["space","hr","heading","code","table","blockquote","list","html","paragraph","text"].includes(e.type)){n+=t||"";continue}}const i=r;switch(i.type){case"space":n+=this.renderer.space(i);continue;case"hr":n+=this.renderer.hr(i);continue;case"heading":n+=this.renderer.heading(i);continue;case"code":n+=this.renderer.code(i);continue;case"table":n+=this.renderer.table(i);continue;case"blockquote":n+=this.renderer.blockquote(i);continue;case"list":n+=this.renderer.list(i);continue;case"html":n+=this.renderer.html(i);continue;case"paragraph":n+=this.renderer.paragraph(i);continue;case"text":{let r=i,l=this.renderer.text(r);for(;s+1<e.length&&"text"===e[s+1].type;)r=e[++s],l+="\n"+this.renderer.text(r);n+=t?this.renderer.paragraph({type:"paragraph",raw:l,text:l,tokens:[{type:"text",raw:l,text:l,escaped:!0}]}):l;continue}default:{const e='Token with "'+i.type+'" type was not found.';if(this.options.silent)return console.error(e),"";throw new Error(e)}}}return n}parseInline(e,t=this.renderer){let n="";for(let s=0;s<e.length;s++){const r=e[s];if(this.options.extensions?.renderers?.[r.type]){const e=this.options.extensions.renderers[r.type].call({parser:this},r);if(!1!==e||!["escape","html","link","image","strong","em","codespan","br","del","text"].includes(r.type)){n+=e||"";continue}}const i=r;switch(i.type){case"escape":case"text":n+=t.text(i);break;case"html":n+=t.html(i);break;case"link":n+=t.link(i);break;case"image":n+=t.image(i);break;case"strong":n+=t.strong(i);break;case"em":n+=t.em(i);break;case"codespan":n+=t.codespan(i);break;case"br":n+=t.br(i);break;case"del":n+=t.del(i);break;default:{const e='Token with "'+i.type+'" type was not found.';if(this.options.silent)return console.error(e),"";throw new Error(e)}}}return n}},xe=class{options;block;constructor(e){this.options=e||h}static passThroughHooks=new Set(["preprocess","postprocess","processAllTokens"]);preprocess(e){return e}postprocess(e){return e}processAllTokens(e){return e}provideLexer(){return this.block?ge.lex:ge.lexInline}provideParser(){return this.block?de.parse:de.parseInline}},be=class{defaults={async:!1,breaks:!1,extensions:null,gfm:!0,hooks:null,pedantic:!1,renderer:null,silent:!1,tokenizer:null,walkTokens:null};options=this.setOptions;parse=this.parseMarkdown(!0);parseInline=this.parseMarkdown(!1);Parser=de;Renderer=ke;TextRenderer=fe;Lexer=ge;Tokenizer=ue;Hooks=xe;constructor(...e){this.use(...e)}walkTokens(e,t){let n=[];for(const s of e)switch(n=n.concat(t.call(this,s)),s.type){case"table":{const e=s;for(const s of e.header)n=n.concat(this.walkTokens(s.tokens,t));for(const s of e.rows)for(const e of s)n=n.concat(this.walkTokens(e.tokens,t));break}case"list":{const e=s;n=n.concat(this.walkTokens(e.items,t));break}default:{const e=s;this.defaults.extensions?.childTokens?.[e.type]?this.defaults.extensions.childTokens[e.type].forEach((s=>{const r=e[s].flat(1/0);n=n.concat(this.walkTokens(r,t))})):e.tokens&&(n=n.concat(this.walkTokens(e.tokens,t)))}}return n}use(...e){const t=this.defaults.extensions||{renderers:{},childTokens:{}};return e.forEach((e=>{const n={...e};if(n.async=this.defaults.async||n.async||!1,e.extensions&&(e.extensions.forEach((e=>{if(!e.name)throw new Error("extension name required");if("renderer"in e){const n=t.renderers[e.name];t.renderers[e.name]=n?function(...t){let s=e.renderer.apply(this,t);return!1===s&&(s=n.apply(this,t)),s}:e.renderer}if("tokenizer"in e){if(!e.level||"block"!==e.level&&"inline"!==e.level)throw new Error("extension level must be 'block' or 'inline'");const n=t[e.level];n?n.unshift(e.tokenizer):t[e.level]=[e.tokenizer],e.start&&("block"===e.level?t.startBlock?t.startBlock.push(e.start):t.startBlock=[e.start]:"inline"===e.level&&(t.startInline?t.startInline.push(e.start):t.startInline=[e.start]))}"childTokens"in e&&e.childTokens&&(t.childTokens[e.name]=e.childTokens)})),n.extensions=t),e.renderer){const t=this.defaults.renderer||new ke(this.defaults);for(const n in e.renderer){if(!(n in t))throw new Error(`renderer '${n}' does not exist`);if(["options","parser"].includes(n))continue;const s=n,r=e.renderer[s],i=t[s];t[s]=(...e)=>{let n=r.apply(t,e);return!1===n&&(n=i.apply(t,e)),n||""}}n.renderer=t}if(e.tokenizer){const t=this.defaults.tokenizer||new ue(this.defaults);for(const n in e.tokenizer){if(!(n in t))throw new Error(`tokenizer '${n}' does not exist`);if(["options","rules","lexer"].includes(n))continue;const s=n,r=e.tokenizer[s],i=t[s];t[s]=(...e)=>{let n=r.apply(t,e);return!1===n&&(n=i.apply(t,e)),n}}n.tokenizer=t}if(e.hooks){const t=this.defaults.hooks||new xe;for(const n in e.hooks){if(!(n in t))throw new Error(`hook '${n}' does not exist`);if(["options","block"].includes(n))continue;const s=n,r=e.hooks[s],i=t[s];xe.passThroughHooks.has(n)?t[s]=e=>{if(this.defaults.async)return Promise.resolve(r.call(t,e)).then((e=>i.call(t,e)));const n=r.call(t,e);return i.call(t,n)}:t[s]=(...e)=>{let n=r.apply(t,e);return!1===n&&(n=i.apply(t,e)),n}}n.hooks=t}if(e.walkTokens){const t=this.defaults.walkTokens,s=e.walkTokens;n.walkTokens=function(e){let n=[];return n.push(s.call(this,e)),t&&(n=n.concat(t.call(this,e))),n}}this.defaults={...this.defaults,...n}})),this}setOptions(e){return this.defaults={...this.defaults,...e},this}lexer(e,t){return ge.lex(e,t??this.defaults)}parser(e,t){return de.parse(e,t??this.defaults)}parseMarkdown(e){return(t,n)=>{const s={...n},r={...this.defaults,...s},i=this.onError(!!r.silent,!!r.async);if(!0===this.defaults.async&&!1===s.async)return i(new Error("marked(): The async option was set to true by an extension. Remove async: false from the parse options object to return a Promise."));if(null==t)return i(new Error("marked(): input parameter is undefined or null"));if("string"!=typeof t)return i(new Error("marked(): input parameter is of type "+Object.prototype.toString.call(t)+", string expected"));r.hooks&&(r.hooks.options=r,r.hooks.block=e);const l=r.hooks?r.hooks.provideLexer():e?ge.lex:ge.lexInline,o=r.hooks?r.hooks.provideParser():e?de.parse:de.parseInline;if(r.async)return Promise.resolve(r.hooks?r.hooks.preprocess(t):t).then((e=>l(e,r))).then((e=>r.hooks?r.hooks.processAllTokens(e):e)).then((e=>r.walkTokens?Promise.all(this.walkTokens(e,r.walkTokens)).then((()=>e)):e)).then((e=>o(e,r))).then((e=>r.hooks?r.hooks.postprocess(e):e)).catch(i);try{r.hooks&&(t=r.hooks.preprocess(t));let e=l(t,r);r.hooks&&(e=r.hooks.processAllTokens(e)),r.walkTokens&&this.walkTokens(e,r.walkTokens);let n=o(e,r);return r.hooks&&(n=r.hooks.postprocess(n)),n}catch(e){return i(e)}}}onError(e,t){return n=>{if(n.message+="\nPlease report this to https://github.com/markedjs/marked.",e){const e="<p>An error occurred:</p><pre>"+oe(n.message+"",!0)+"</pre>";return t?Promise.resolve(e):e}if(t)return Promise.reject(n);throw n}}},me=new be;function we(e,t){return me.parse(e,t)}we.options=we.setOptions=function(e){return me.setOptions(e),we.defaults=me.defaults,p(we.defaults),we},we.getDefaults=c,we.defaults=h,we.use=function(...e){return me.use(...e),we.defaults=me.defaults,p(we.defaults),we},we.walkTokens=function(e,t){return me.walkTokens(e,t)},we.parseInline=me.parseInline,we.Parser=de,we.parser=de.parse,we.Renderer=ke,we.TextRenderer=fe,we.Lexer=ge,we.lexer=ge.lex,we.Tokenizer=ue,we.Hooks=xe,we.parse=we;var ye=we.options,$e=we.setOptions,Re=we.use,Se=we.walkTokens,Te=we.parseInline,ze=we,Ae=de.parse,_e=ge.lex;return n!=t&&(s.exports=t),s.exports}));
+//# sourceMappingURL=/sm/6c3c8eaa18113e0836f4d1615ec8fd57c9c687494ce85598912be08c319c4aa7.map
 'use strict';
 const $=id=>document.getElementById(id);
 let selected=null,after=0,pending=null,sequence=0;
+const tools=new Map();
+const escapeHTML=value=>String(value).replace(/[&<>"']/g,ch=>({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'}[ch]));
+const markdownRenderer=new marked.Marked({renderer:{html({text}){return escapeHTML(text);}}});
+const markdown=value=>markdownRenderer.parse(value);
+function toolArguments(call){
+  const args=call.arguments||{};
+  if(call.name==='bash')return '<pre><code>'+escapeHTML(args.command||'')+'</code></pre>';
+  const path=args.path?'<code>'+escapeHTML(args.path)+'</code>':'';
+  if(call.name==='edit')return path+(args.edits||[args]).map(edit=>'<div>Old text</div><pre>'+escapeHTML(edit.oldText||'')+'</pre><div>New text</div><pre>'+escapeHTML(edit.newText||'')+'</pre>').join('');
+  if(call.name==='read'||call.name==='write')return path;
+  return '<pre>'+escapeHTML(JSON.stringify(args,null,2))+'</pre>';
+}
+function toolResult(message){
+  const content=text(message.content)||JSON.stringify(message.structuredOutput??message,null,2);
+  const long=content.length>600||content.split('\n').length>8;
+  return '<details'+(long?'':' open')+'><summary>'+(message.isError?'Error':'Result')+'</summary><pre>'+escapeHTML(content)+'</pre></details>';
+}
+function toolCard(call,box){
+  let tool=tools.get(call.id);
+  if(!tool){
+    const card=document.createElement('div'),result=document.createElement('div');card.className='tool';
+    card.innerHTML='<strong>'+escapeHTML(call.name||'Tool')+'</strong>'+toolArguments(call);
+    card.append(result);box.append(card);tool={card,result};tools.set(call.id,tool);
+  }
+  return tool;
+}
 async function api(path,body){
   const response=await fetch('/api/'+path,body===undefined?{}:{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify(body)});
   const value=await response.json();
@@ -22,23 +58,26 @@ function entry(record){
   const box=document.createElement('div');box.className='entry '+(record.kind==='pi.user'?'user':'');
   const messages=Array.isArray(record.model)?record.model:[record.model||record.data||record];
   for(const message of messages){
-    const calls=Array.isArray(message.content)?message.content.filter(part=>part.type==='toolCall'):[];
-    if(record.kind==='pi.tool-result'||calls.length){
-      const details=document.createElement('details'),summary=document.createElement('summary'),result=document.createElement('pre');
-      const name=message.toolName||message.name||calls.map(call=>call.name).join(', ')||'Tool';
-      const content=text(message.content)||JSON.stringify(message);
-      summary.textContent=name+' — '+content.slice(0,140);result.textContent=content;
-      details.append(summary,result);box.append(details);
+    if(record.kind==='pi.tool-result'){
+      const tool=toolCard({id:message.toolCallId,name:message.toolName},box);
+      tool.card.className='tool'+(message.isError?' error':'');tool.result.innerHTML=toolResult(message);
+      continue;
+    }
+    for(const part of Array.isArray(message.content)?message.content:[]){
+      if(part.type==='thinking'&&part.thinking?.trim()){
+        const thinking=document.createElement('em');thinking.className='thinking';thinking.textContent=part.thinking;box.append(thinking);
+      }
+      if(part.type==='toolCall')toolCard(part,box);
     }
     const content=text(message.content)||text(message.text);
     if(content&&record.kind!=='pi.tool-result'){
       const label=document.createElement('strong'),paragraph=document.createElement('div');
-      label.textContent=record.kind==='pi.user'?'You':'Assistant';paragraph.textContent=content;box.append(label,paragraph);
+      label.textContent=record.kind==='pi.user'?'You':'Assistant';paragraph.className='markdown';paragraph.innerHTML=markdown(content);box.append(label,paragraph);
     }
   }
   if(box.childNodes.length)$('entries').append(box);
 }
-function select(id){selected=id;after=0;$('entries').replaceChildren();}
+function select(id){selected=id;after=0;tools.clear();$('entries').replaceChildren();}
 async function refresh(){
   try{
     const {conversations}=await api('conversations');
@@ -67,6 +106,9 @@ async function refresh(){
   }catch(error){$('error').textContent=' '+error.message;}
   setTimeout(refresh,1000);
 }
+$('input').onkeydown=event=>{
+  if(event.key==='Enter'&&(event.ctrlKey||event.metaKey)&&!event.isComposing){event.preventDefault();$('compose').requestSubmit();}
+};
 $('compose').onsubmit=async event=>{
   event.preventDefault();const content=$('input').value;
   if(selected===null||!content.trim())return;
diff --git a/userland/chat/marked-LICENSE.md b/userland/chat/marked-LICENSE.md
new file mode 100644
index 0000000..4bd2d4a
--- /dev/null
+++ b/userland/chat/marked-LICENSE.md
@@ -0,0 +1,44 @@
+# License information
+
+## Contribution License Agreement
+
+If you contribute code to this project, you are implicitly allowing your code
+to be distributed under the MIT license. You are also implicitly verifying that
+all code is your original work. `</legalese>`
+
+## Marked
+
+Copyright (c) 2018+, MarkedJS (https://github.com/markedjs/)
+Copyright (c) 2011-2018, Christopher Jeffrey (https://github.com/chjj/)
+
+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 copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+## Markdown
+
+Copyright © 2004, John Gruber
+http://daringfireball.net/
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+* Neither the name “Markdown” nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+This software is provided by the copyright holders and contributors “as is” and any express or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose are disclaimed. In no event shall the copyright owner or contributors be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the use of this software, even if advised of the possibility of such damage.
diff --git a/userland/chat/render.test.cjs b/userland/chat/render.test.cjs
new file mode 100644
index 0000000..de66bfa
--- /dev/null
+++ b/userland/chat/render.test.cjs
@@ -0,0 +1,65 @@
+// Test the extracted page script without a server or a browser dependency.
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const vm = require('node:vm');
+class Element {
+  constructor(tag) { this.tag = tag; this.childNodes = []; this.innerHTML = ''; this.textContent = ''; }
+  append(...nodes) { this.childNodes.push(...nodes); }
+  replaceChildren(...nodes) { this.childNodes = nodes; }
+  requestSubmit() { this.submits = (this.submits || 0) + 1; }
+}
+const elements = new Map();
+const document = {
+  getElementById(id) { if (!elements.has(id)) elements.set(id, new Element(id)); return elements.get(id); },
+  createElement(tag) { return new Element(tag); },
+};
+const context = vm.createContext({ document, fetch: () => new Promise(() => {}), setTimeout() {} });
+vm.runInContext(fs.readFileSync(process.argv[2], 'utf8'), context);
+const run = source => vm.runInContext(source, context);
+const render = value => { context.markdownInput = value; return run('markdown(markdownInput)'); };
+const html = render('# Heading\n\n- **Bold** and *italic* [link](https://example.com) `inline`\n\n```js\nconst x = 1 < 2;\n```\n\n| Name | Value |\n| --- | --- |\n| one | two |\n\n<script>alert(1)</script>');
+for (const expected of ['<h1>', '<ul>', '<strong>', '<em>', '<a href="https://example.com">', '<code>inline</code>', '<pre><code', '<table>', '<td>two</td>', '&lt;script&gt;']) assert.ok(html.includes(expected), expected);
+assert.ok(!html.includes('<script>'));
+assert.ok(run("markdown('Text <b>raw</b> & more')").includes('&lt;b&gt;raw&lt;/b&gt;'));
+const entry = record => { context.fixture = record; run('entry(fixture)'); };
+entry({ kind: 'pi.user', model: { content: '# User heading' } });
+assert.ok(elements.get('entries').childNodes[0].childNodes[1].innerHTML.includes('<h1>User heading</h1>'));
+entry({ kind: 'pi.assistant', model: { content: [
+  { type: 'thinking', thinking: '', signature: 'empty' },
+  { type: 'thinking', thinking: 'Check the files.' },
+  { type: 'toolCall', id: 'one', name: 'bash', arguments: { command: 'ls <missing>' } },
+  { type: 'toolCall', id: 'two', name: 'bash', arguments: { command: 'pwd' } },
+  { type: 'text', text: '**Answer**' },
+] } });
+assert.equal(run('tools.size'), 2);
+assert.equal(run("tools.get('one').card.innerHTML"), '<strong>bash</strong><pre><code>ls &lt;missing&gt;</code></pre>');
+entry({ kind: 'pi.tool-result', model: [{ toolCallId: 'two', toolName: 'bash', content: [{ type: 'text', text: '/work' }] }] });
+entry({ kind: 'pi.tool-result', model: [{ toolCallId: 'one', toolName: 'bash', isError: true, content: [{ type: 'text', text: '<failure>\n'.repeat(12) }] }] });
+assert.equal(run('tools.size'), 2, 'Results reuse cards by ID, not by name');
+assert.equal(run("tools.get('one').card.className"), 'tool error');
+assert.ok(run("tools.get('one').result.innerHTML").includes('<details><summary>Error</summary>'));
+assert.ok(run("tools.get('one').result.innerHTML").includes('&lt;failure&gt;'));
+assert.ok(run("tools.get('two').result.innerHTML").includes('<details open><summary>Result</summary><pre>/work</pre>'));
+const assistant = elements.get('entries').childNodes[1];
+assert.equal(assistant.childNodes.filter(node => node.tag === 'em').length, 1);
+assert.equal(assistant.childNodes[0].className, 'thinking');
+assert.equal(assistant.childNodes[0].textContent, 'Check the files.');
+assert.ok(assistant.childNodes.at(-1).innerHTML.includes('<strong>Answer</strong>'));
+for (const name of ['read', 'write']) assert.equal(run(`toolArguments({name:'${name}',arguments:{path:'/a<b'}})`), '<code>/a&lt;b</code>');
+const edit = run("toolArguments({name:'edit',arguments:{path:'/file',edits:[{oldText:'<old>',newText:'<new>'}]}})");
+assert.ok(edit.includes('Old text</div><pre>&lt;old&gt;</pre>'));
+assert.ok(edit.includes('New text</div><pre>&lt;new&gt;</pre>'));
+const keydown = elements.get('input').onkeydown;
+for (const modifier of ['ctrlKey', 'metaKey']) {
+  let prevented = false;
+  keydown({ key: 'Enter', [modifier]: true, preventDefault() { prevented = true; } });
+  assert.ok(prevented);
+}
+assert.equal(elements.get('compose').submits, 2);
+keydown({ key: 'Enter', preventDefault() { assert.fail('Plain Enter must insert a newline'); } });
+keydown({ key: 'Enter', ctrlKey: true, isComposing: true, preventDefault() { assert.fail('Do not submit IME composition'); } });
+assert.equal(elements.get('compose').submits, 2);
+run('select(2)');
+assert.equal(run('tools.size'), 0);
+assert.equal(elements.get('entries').childNodes.length, 0);
+console.log('PASS markdown, escaped HTML, paired tools, errors, long results, thinking, and keyboard shortcuts');