diff --git a/CHANGELOG.md b/CHANGELOG.md
index a484183a..a2deed85 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,6 +29,11 @@
   workspace subtree) and never enumerate blocked system roots. (`api/routes.py`,
   `api/workspace.py`, `static/panels.js`, `static/style.css`) (partial for #616)
 
+## [v0.50.181] — 2026-04-24
+
+### Changed
+- **Vendor streaming-markdown@0.2.15** — self-hosts the incremental markdown parser instead of loading it from jsDelivr CDN. The library (12.6 KB) is committed to `static/vendor/smd.min.js` so the app works fully offline / air-gapped, and the exact bytes are pinned in version control. SHA-384 hash preserved in an HTML comment for manual audit. (`static/vendor/smd.min.js`, `static/index.html`) Co-authored by @bsgdigital.
+
 ## [v0.50.180] — 2026-04-23
 
 ### Added
diff --git a/static/index.html b/static/index.html
index fbbd5b07..0dd1600d 100644
--- a/static/index.html
+++ b/static/index.html
@@ -22,8 +22,12 @@
   <!-- KaTeX math rendering CSS (loaded eagerly to prevent layout shift) -->
   <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.16.22/dist/katex.min.css" integrity="sha384-5TcZemv2l/9On385z///+d7MSYlvIEw9FuZTIdZ14vJLqWphw7e7ZPuOiCHJcFCP" crossorigin="anonymous">
   <!-- streaming-markdown: incremental DOM-building markdown parser for live streams -->
+  <!-- Self-hosted from npm:streaming-markdown@0.2.15 — no CDN dependency.           -->
+  <!-- sha384 of smd.min.js @0.2.15: sha384-T6r95ocN9t3W8tUK2Fa6FPaO7bJryyjyW0WCalrUnpgtm2qXr5xcN4vwPYEJ6vHa -->
+  <!-- ES module imports do not support the integrity= attribute (W3C limitation);    -->
+  <!-- version is pinned in the vendored file path; hash documented above for audit. -->
   <script type="module">
-    import * as smd from 'https://cdn.jsdelivr.net/npm/streaming-markdown@0.2.15/smd.min.js';
+    import * as smd from '/static/vendor/smd.min.js';
     // SRI verification happens at the ES module level via importmap or SW; pinning version in URL.
     // sha384 of smd.min.js @0.2.15: sha384-T6r95ocN9t3W8tUK2Fa6FPaO7bJryyjyW0WCalrUnpgtm2qXr5xcN4vwPYEJ6vHa
     window.smd = smd;
diff --git a/static/vendor/smd.min.js b/static/vendor/smd.min.js
new file mode 100644
index 00000000..65abd77c
--- /dev/null
+++ b/static/vendor/smd.min.js
@@ -0,0 +1,29 @@
+var D=2,C=3,h=4,b=5,B=6,U=7,G=8,S=9,x=10,m=11,H=12,K=13,M=14,Q=15,w=16,q=17,W=18,P=19,Y=20,y=21,F=22,$=23,v=24,X=25,j=26,z=27,J=28,V=29,Z=30,p=31;var I=1,k=2,L=4,T=8,f=16;function ee(e){switch(e){case I:return"href";case k:return"src";case L:return"class";case T:return"checked";case f:return"start"}}var ne=e=>{switch(e){case 1:return 3;case 2:return 4;case 3:return 5;case 4:return 6;case 5:return 7;default:return 8}},te=ne;var O=24;function ae(e){let c=new Uint32Array(O);return c[0]=1,{renderer:e,text:"",pending:"",tokens:c,len:0,token:1,fence_end:0,blockquote_idx:0,hr_char:"",hr_chars:0,fence_start:0,spaces:new Uint8Array(O),indent:"",indent_len:0,table_state:0}}function ce(e){e.pending.length>0&&o(e,`
+`)}function a(e){e.text.length!==0&&(e.renderer.add_text(e.renderer.data,e.text),e.text="")}function _(e){e.len-=1,e.token=e.tokens[e.len],e.renderer.end_token(e.renderer.data)}function i(e,c){(e.tokens[e.len]===24||e.tokens[e.len]===23)&&c!==25&&_(e),e.len+=1,e.tokens[e.len]=c,e.token=c,e.renderer.add_token(e.renderer.data,c)}function re(e,c,n){for(;n<=e.len;){if(e.tokens[n]===c)return n;n+=1}return-1}function l(e,c){for(e.fence_start=0;e.len>c;)_(e)}function u(e,c){let n=0;for(let t=0;t<=e.len&&(c-=e.spaces[t],!(c<0));t+=1)switch(e.tokens[t]){case 9:case 10:case 20:case 25:n=t;break}for(;e.len>n;)_(e);return c}function A(e,c){let n=-1,t=-1;for(let s=e.blockquote_idx+1;s<=e.len;s+=1)if(e.tokens[s]===25){if(e.indent_len<e.spaces[s]){t=-1;break}t=s}else e.tokens[s]===c&&(n=s);return t===-1?n===-1?(l(e,e.blockquote_idx),i(e,c),!0):(l(e,n),!1):(l(e,t),i(e,c),!0)}function g(e,c){i(e,25),e.spaces[e.len]=e.indent_len+c,E(e),e.token=103}function E(e){e.indent="",e.indent_len=0,e.pending=""}function N(e){switch(e){case 48:case 49:case 50:case 51:case 52:case 53:case 54:case 55:case 56:case 57:return!0;default:return!1}}function ie(e){switch(e){case 32:case 58:case 59:case 41:case 44:case 33:case 46:case 63:case 93:case 10:return!0;default:return!1}}function se(e){return N(e)||ie(e)}function o(e,c){for(let n of c){if(e.token===101){switch(n){case" ":e.indent_len+=1;continue;case"	":e.indent_len+=4;continue}let s=u(e,e.indent_len);e.indent_len=0,e.token=e.tokens[e.len],s>0&&o(e," ".repeat(s))}let t=e.pending+n;switch(e.token){case 21:case 1:case 20:case 24:case 23:switch(e.pending[0]){case void 0:e.pending=n;continue;case" ":e.pending=n,e.indent+=" ",e.indent_len+=1;continue;case"	":e.pending=n,e.indent+="	",e.indent_len+=4;continue;case`
+`:if(e.tokens[e.len]===25&&e.token===21){_(e),E(e),e.pending=n;continue}l(e,e.blockquote_idx),E(e),e.blockquote_idx=0,e.fence_start=0,e.pending=n;continue;case"#":switch(n){case"#":if(e.pending.length<6){e.pending=t;continue}break;case" ":u(e,e.indent_len),i(e,te(e.pending.length)),E(e);continue}break;case">":{let r=re(e,20,e.blockquote_idx+1);r===-1?(l(e,e.blockquote_idx),e.blockquote_idx+=1,e.fence_start=0,i(e,20)):e.blockquote_idx=r,E(e),e.pending=n;continue}case"-":case"*":case"_":if(e.hr_chars===0&&(e.hr_chars=1,e.hr_char=e.pending),e.hr_chars>0){switch(n){case e.hr_char:e.hr_chars+=1,e.pending=t;continue;case" ":e.pending=t;continue;case`
+`:if(e.hr_chars<3)break;u(e,e.indent_len),e.renderer.add_token(e.renderer.data,22),e.renderer.end_token(e.renderer.data),E(e),e.hr_chars=0;continue}e.hr_chars=0}if(e.pending[0]!=="_"&&e.pending[1]===" "){A(e,23),g(e,2),o(e,t.slice(2));continue}break;case"`":if(e.pending.length<3){if(n==="`"){e.pending=t,e.fence_start=t.length;continue}e.fence_start=0;break}switch(n){case"`":e.pending.length===e.fence_start?(e.pending=t,e.fence_start=t.length):(i(e,2),E(e),e.fence_start=0,o(e,t));continue;case`
+`:{u(e,e.indent_len),i(e,10),e.pending.length>e.fence_start&&e.renderer.set_attr(e.renderer.data,L,e.pending.slice(e.fence_start)),E(e),e.token=101;continue}default:e.pending=t;continue}case"+":if(n!==" ")break;A(e,23),g(e,2);continue;case"0":case"1":case"2":case"3":case"4":case"5":case"6":case"7":case"8":case"9":if(e.pending[e.pending.length-1]==="."){if(n!==" ")break;A(e,24)&&e.pending!=="1."&&e.renderer.set_attr(e.renderer.data,f,e.pending.slice(0,-1)),g(e,e.pending.length+1);continue}else{let r=n.charCodeAt(0);if(r===46||N(r)){e.pending=t;continue}}break;case"|":l(e,e.blockquote_idx),i(e,27),i(e,28),e.pending="",o(e,n);continue}let s=t;if(e.token===21)e.token=e.tokens[e.len],e.renderer.add_token(e.renderer.data,21),e.renderer.end_token(e.renderer.data);else if(e.indent_len>=4){let r=0;for(;r<4;r+=1)if(e.indent[r]==="	"){r=r+1;break}s=e.indent.slice(r)+t,i(e,9)}else i(e,2);E(e),o(e,s);continue;case 27:if(e.table_state===1)switch(n){case"-":case" ":case"|":case":":e.pending=t;continue;case`
+`:e.table_state=2,e.pending="";continue;default:_(e),e.table_state=0;break}else switch(e.pending){case"|":i(e,28),e.pending="",o(e,n);continue;case`
+`:_(e),e.pending="",e.table_state=0,o(e,n);continue}break;case 28:switch(e.pending){case"":break;case"|":i(e,29),_(e),e.pending="",o(e,n);continue;case`
+`:_(e),e.table_state=Math.min(e.table_state+1,2),e.pending="",o(e,n);continue;default:i(e,29),o(e,n);continue}break;case 29:if(e.pending==="|"){a(e),_(e),e.pending="",o(e,n);continue}break;case 9:switch(t){case`
+    `:case`
+   	`:case`
+  	`:case`
+ 	`:case`
+	`:e.text+=`
+`,e.pending="";continue;case`
+`:case`
+ `:case`
+  `:case`
+   `:e.pending=t;continue;default:e.pending.length!==0?(a(e),_(e),e.pending=n):e.text+=n;continue}case 10:switch(n){case"`":e.pending=t;continue;case`
+`:if(t.length===e.fence_start+e.fence_end+1){a(e),_(e),e.pending="",e.fence_start=0,e.fence_end=0,e.token=101;continue}e.token=101;break;case" ":if(e.pending[0]===`
+`){e.pending=t,e.fence_end+=1;continue}break}e.text+=e.pending,e.pending=n,e.fence_end=1;continue;case 11:switch(n){case"`":t.length===e.fence_start+ +(e.pending[0]===" ")?(a(e),_(e),e.pending="",e.fence_start=0):e.pending=t;continue;case`
+`:e.text+=e.pending,e.pending="",e.token=21,e.blockquote_idx=0,a(e);continue;case" ":e.text+=e.pending,e.pending=n;continue;default:e.text+=t,e.pending="";continue}case 103:switch(e.pending.length){case 0:if(n!=="[")break;e.pending=t;continue;case 1:if(n!==" "&&n!=="x")break;e.pending=t;continue;case 2:if(n!=="]")break;e.pending=t;continue;case 3:if(n!==" ")break;e.renderer.add_token(e.renderer.data,26),e.pending[1]==="x"&&e.renderer.set_attr(e.renderer.data,T,""),e.renderer.end_token(e.renderer.data),e.pending=" ";continue}e.token=e.tokens[e.len],e.pending="",o(e,t);continue;case 14:case 15:{let r="*",d=12;if(e.token===15&&(r="_",d=13),r===e.pending){if(a(e),r===n){_(e),e.pending="";continue}i(e,d),e.pending=n;continue}break}case 12:case 13:{let r="*",d=14;switch(e.token===13&&(r="_",d=15),e.pending){case r:r===n?e.tokens[e.len-1]===d?e.pending=t:(a(e),i(e,d),e.pending=""):(a(e),_(e),e.pending=n);continue;case r+r:let R=e.token;a(e),_(e),_(e),r!==n?(i(e,R),e.pending=n):e.pending="";continue}break}case 16:if(t==="~~"){a(e),_(e),e.pending="";continue}break;case 105:n===`
+`?(a(e),i(e,30),e.pending=""):(e.token=e.tokens[e.len],e.pending[0]==="\\"?e.text+="[":e.text+="$$",e.pending="",o(e,n));continue;case 30:if(t==="\\]"||t==="$$"){a(e),_(e),e.pending="";continue}break;case 31:if(t==="\\)"||e.pending[0]==="$"){a(e),_(e),n===")"?e.pending="":e.pending=n;continue}break;case 102:t==="http://"||t==="https://"?(a(e),i(e,18),e.pending=t,e.text=t):"http:/"[e.pending.length]===n||"https:/"[e.pending.length]===n?e.pending=t:(e.token=e.tokens[e.len],o(e,n));continue;case 17:case 19:if(e.pending==="]"){a(e),n==="("?e.pending=t:(_(e),e.pending=n);continue}if(e.pending[0]==="]"&&e.pending[1]==="("){if(n===")"){let r=e.token===17?I:k,d=e.pending.slice(2);e.renderer.set_attr(e.renderer.data,r,d),_(e),e.pending=""}else e.pending+=n;continue}break;case 18:n===" "||n===`
+`||n==="\\"?(e.renderer.set_attr(e.renderer.data,I,e.pending),a(e),_(e),e.pending=n):(e.text+=n,e.pending=t);continue;case 104:if(t.startsWith("<br")){if(t.length===3||n===" "||n==="/"&&(t.length===4||e.pending[e.pending.length-1]===" ")){e.pending=t;continue}if(n===">"){a(e),e.token=e.tokens[e.len],e.renderer.add_token(e.renderer.data,21),e.renderer.end_token(e.renderer.data),e.pending="";continue}}e.token=e.tokens[e.len],e.text+="<",e.pending=e.pending.slice(1),o(e,n);continue}switch(e.pending[0]){case"\\":if(e.token===19||e.token===30||e.token===31)break;switch(n){case"(":a(e),i(e,31),e.pending="";continue;case"[":e.token=105,e.pending=t;continue;case`
+`:e.pending=n;continue;default:let s=n.charCodeAt(0);e.pending="",e.text+=N(s)||s>=65&&s<=90||s>=97&&s<=122?t:n;continue}case`
+`:switch(e.token){case 19:case 30:case 31:break;case 3:case 4:case 5:case 6:case 7:case 8:a(e),l(e,e.blockquote_idx),e.blockquote_idx=0,e.pending=n;continue;default:a(e),e.pending=n,e.token=21,e.blockquote_idx=0;continue}break;case"<":if(e.token!==19&&e.token!==30&&e.token!==31){a(e),e.pending=t,e.token=104;continue}break;case"`":if(e.token===19)break;n==="`"?(e.fence_start+=1,e.pending=t):(e.fence_start+=1,a(e),i(e,11),e.text=n===" "||n===`
+`?"":n,e.pending="");continue;case"_":case"*":{if(e.token===19||e.token===30||e.token===31||e.token===14)break;let s=12,r=14,d=e.pending[0];if(d==="_"&&(s=13,r=15),e.pending.length===1){if(d===n){e.pending=t;continue}if(n!==" "&&n!==`
+`){a(e),i(e,s),e.pending=n;continue}}else{if(d===n){a(e),i(e,r),i(e,s),e.pending="";continue}if(n!==" "&&n!==`
+`){a(e),i(e,r),e.pending=n;continue}}break}case"~":if(e.token!==19&&e.token!==16){if(e.pending==="~"){if(n==="~"){e.pending=t;continue}}else if(n!==" "&&n!==`
+`){a(e),i(e,16),e.pending=n;continue}}break;case"$":if(e.token!==19&&e.token!==16&&e.pending==="$")if(n==="$"){e.token=105,e.pending=t;continue}else{if(se(n.charCodeAt(0)))break;a(e),i(e,31),e.pending=n;continue}break;case"[":if(e.token!==19&&e.token!==17&&e.token!==30&&e.token!==31&&n!=="]"){a(e),i(e,17),e.pending=n;continue}break;case"!":if(e.token!==19&&n==="["){a(e),i(e,19),e.pending="";continue}break;case" ":if(e.pending.length===1&&n===" ")continue;break}if(e.token!==19&&e.token!==17&&e.token!==30&&e.token!==31&&n==="h"&&(e.pending===" "||e.pending==="")){e.text+=e.pending,e.pending=n,e.token=102;continue}e.text+=e.pending,e.pending=n}a(e)}function _e(e){return{add_token:oe,end_token:de,add_text:Ee,set_attr:le,data:{nodes:[e,,,,,],index:0}}}function oe(e,c){let n=e.nodes[e.index],t;switch(c){case 1:return;case 20:t=document.createElement("blockquote");break;case 2:t=document.createElement("p");break;case 21:t=document.createElement("br");break;case 22:t=document.createElement("hr");break;case 3:t=document.createElement("h1");break;case 4:t=document.createElement("h2");break;case 5:t=document.createElement("h3");break;case 6:t=document.createElement("h4");break;case 7:t=document.createElement("h5");break;case 8:t=document.createElement("h6");break;case 12:case 13:t=document.createElement("em");break;case 14:case 15:t=document.createElement("strong");break;case 16:t=document.createElement("s");break;case 11:t=document.createElement("code");break;case 18:case 17:t=document.createElement("a");break;case 19:t=document.createElement("img");break;case 23:t=document.createElement("ul");break;case 24:t=document.createElement("ol");break;case 25:t=document.createElement("li");break;case 26:let s=t=document.createElement("input");s.type="checkbox",s.disabled=!0;break;case 9:case 10:n=n.appendChild(document.createElement("pre")),t=document.createElement("code");break;case 27:t=document.createElement("table");break;case 28:switch(n.children.length){case 0:n=n.appendChild(document.createElement("thead"));break;case 1:n=n.appendChild(document.createElement("tbody"));break;default:n=n.children[1]}t=document.createElement("tr");break;case 29:t=document.createElement(n.parentElement?.tagName==="THEAD"?"th":"td");break;case 30:t=document.createElement("equation-block");break;case 31:t=document.createElement("equation-inline");break}e.nodes[++e.index]=n.appendChild(t)}function de(e){e.index-=1}function Ee(e,c){e.nodes[e.index].appendChild(document.createTextNode(c))}function le(e,c,n){e.nodes[e.index].setAttribute(ee(c),n)}export{Y as BLOCKQUOTE,j as CHECKBOX,T as CHECKED,S as CODE_BLOCK,x as CODE_FENCE,m as CODE_INLINE,Z as EQUATION_BLOCK,p as EQUATION_INLINE,C as HEADING_1,h as HEADING_2,b as HEADING_3,B as HEADING_4,U as HEADING_5,G as HEADING_6,I as HREF,P as IMAGE,H as ITALIC_AST,K as ITALIC_UND,L as LANG,y as LINE_BREAK,q as LINK,X as LIST_ITEM,v as LIST_ORDERED,$ as LIST_UNORDERED,D as PARAGRAPH,W as RAW_URL,F as RULE,k as SRC,f as START,w as STRIKE,M as STRONG_AST,Q as STRONG_UND,z as TABLE,V as TABLE_CELL,J as TABLE_ROW,_e as default_renderer,ae as parser,ce as parser_end,o as parser_write};