diff --git a/CHANGELOG.md b/CHANGELOG.md
index 52f0fa2b..8cf74261 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,11 @@
 
 ## [Unreleased]
 
+## [v0.51.251] — 2026-06-03 — Release HS (stage-q23 — composer ~/ path autocomplete)
+
+### Fixed
+- Typing a `~/` path token in the composer (e.g. `check this file ~/`) now opens a home-directory path-suggestion dropdown, matching the TUI's path completion. It reuses the existing slash-command dropdown (positioning + keyboard nav) and the server's trusted `/api/workspaces/suggest` endpoint, and only replaces the matched path token on selection (surrounding message text is preserved). Slash-command autocomplete still takes precedence for `/`-prefixed input. (#3433, @puneetdixit200)
+
 ## [v0.51.250] — 2026-06-03 — Release HR (stage-q22 — Zeus appearance skin)
 
 ### Added
diff --git a/static/boot.js b/static/boot.js
index b9c38919..370db14f 100644
--- a/static/boot.js
+++ b/static/boot.js
@@ -1209,6 +1209,13 @@ $('msg').addEventListener('input',()=>{
       if(matches.length)showCmdDropdown(matches); else hideCmdDropdown();
     }
     if(typeof ensureSkillCommandsLoadedForAutocomplete==='function') ensureSkillCommandsLoadedForAutocomplete();
+  } else if(typeof getComposerPathAutocompleteMatches==='function'){
+    const cursor=$('msg').selectionStart;
+    getComposerPathAutocompleteMatches(text,cursor).then(matches=>{
+      const ta=$('msg');
+      if(!ta||ta.value!==text||ta.selectionStart!==cursor) return;
+      if(matches.length)showCmdDropdown(matches); else hideCmdDropdown();
+    }).catch(()=>hideCmdDropdown());
   } else {
     hideCmdDropdown();
   }
diff --git a/static/commands.js b/static/commands.js
index 7663b504..0c130a38 100644
--- a/static/commands.js
+++ b/static/commands.js
@@ -284,6 +284,38 @@ async function getSlashAutocompleteMatches(text){
     }));
 }
 
+function _findComposerPathToken(text,cursor){
+  const value=String(text||'');
+  const rawCursor=Number(cursor);
+  const pos=Number.isFinite(rawCursor)?Math.max(0,Math.min(rawCursor,value.length)):value.length;
+  let start=pos;
+  while(start>0&&!/\s/.test(value.charAt(start-1))) start-=1;
+  let end=pos;
+  while(end<value.length&&!/\s/.test(value.charAt(end))) end+=1;
+  const prefix=value.slice(start,pos);
+  if(!prefix.startsWith('~/')) return null;
+  return {start,end,prefix};
+}
+
+async function getComposerPathAutocompleteMatches(text,cursor){
+  const token=_findComposerPathToken(text,cursor);
+  if(!token||typeof api!=='function') return [];
+  const qs=new URLSearchParams({prefix:token.prefix}).toString();
+  const data=await api(`/api/workspaces/suggest?${qs}`);
+  const needle=token.prefix.toLowerCase();
+  return ((data&&data.suggestions)||[])
+    .map(path=>String(path||''))
+    .filter(path=>path&&path.toLowerCase().startsWith(needle))
+    .map(path=>({
+      name:path,
+      value:path,
+      desc:'Workspace path',
+      source:'path',
+      tokenStart:token.start,
+      tokenEnd:token.end,
+    }));
+}
+
 function _compressionAnchorMessageKey(m){
   if(!m||!m.role||m.role==='tool') return null;
   let content='';
@@ -1456,16 +1488,37 @@ function showCmdDropdown(matches){
     if(i===_cmdSelectedIdx) el.classList.add('selected');
     el.dataset.idx=i;
     const isSubArg=c.source==='subarg';
+    const isPath=c.source==='path';
     const usage=(!isSubArg&&c.arg)?` <span class="cmd-item-arg">${esc(c.arg)}</span>`:'';
     const badge=c.source==='skill'?`<span class="cmd-item-badge cmd-item-badge-skill">${esc(t('slash_skill_badge'))}</span>`:'';
     if(c.source==='skill') el.classList.add('cmd-item-skill');
-    const nameHtml=isSubArg
+    if(isPath) el.classList.add('cmd-item-path');
+    const nameHtml=isPath
+      ? `<div class="cmd-item-name"><span class="cmd-item-path-value">${esc(c.value)}</span></div>`
+      : isSubArg
       ? `<div class="cmd-item-name"><span class="cmd-item-parent">/${esc(c.parent)}</span> <span class="cmd-item-subarg">${esc(c.value)}</span></div>`
       : `<div class="cmd-item-name">/${esc(c.name)}${usage}${badge}</div>`;
     const descHtml=`<div class="cmd-item-desc">${esc(c.desc)}</div>`;
     el.innerHTML=`${nameHtml}${descHtml}`;
     el.onmousedown=(e)=>{
       e.preventDefault();
+      if(isPath){
+        const ta=$('msg');
+        if(!ta){hideCmdDropdown();return;}
+        const start=Number.isFinite(Number(c.tokenStart))?Number(c.tokenStart):ta.selectionStart;
+        const end=Number.isFinite(Number(c.tokenEnd))?Number(c.tokenEnd):ta.selectionEnd;
+        const nextPath=String(c.value||'').endsWith('/')?String(c.value||''):`${String(c.value||'')}/`;
+        const current=String(ta.value||'');
+        const safeStart=Math.max(0,Math.min(start,current.length));
+        const safeEnd=Math.max(safeStart,Math.min(end,current.length));
+        ta.value=current.slice(0,safeStart)+nextPath+current.slice(safeEnd);
+        const pos=safeStart+nextPath.length;
+        ta.focus();
+        ta.setSelectionRange(pos,pos);
+        ta.dispatchEvent(new Event('input',{bubbles:true}));
+        hideCmdDropdown();
+        return;
+      }
       const nextValue=isSubArg?('/'+c.parent+' '+c.value):('/'+c.name+(c.arg?' ':''));
       $('msg').value=nextValue;
       $('msg').focus();
diff --git a/static/style.css b/static/style.css
index 882d2988..0dae0554 100644
--- a/static/style.css
+++ b/static/style.css
@@ -2548,6 +2548,7 @@
 .cmd-item-name{font-size:13px;color:var(--text);font-weight:500;}
 .cmd-item-parent{color:var(--muted);font-weight:400;}
 .cmd-item-subarg{font-weight:600;}
+.cmd-item-path-value{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;font-size:12px;}
 .cmd-item-arg{color:var(--muted);font-weight:400;font-style:italic;}
 .cmd-item-desc{font-size:11px;color:var(--muted);margin-top:1px;}
 .cmd-item-badge{flex-shrink:0;font-size:10px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;padding:2px 6px;border-radius:999px;border:1px solid var(--border2);color:var(--muted);background:var(--hover-bg);}
diff --git a/tests/test_issue3433_composer_path_completion.py b/tests/test_issue3433_composer_path_completion.py
new file mode 100644
index 00000000..bfd7a1ab
--- /dev/null
+++ b/tests/test_issue3433_composer_path_completion.py
@@ -0,0 +1,114 @@
+"""Regression tests for #3433: chat composer path completion for ~/ tokens."""
+
+import json
+import pathlib
+import shutil
+import subprocess
+import textwrap
+
+import pytest
+
+
+REPO_ROOT = pathlib.Path(__file__).parent.parent
+COMMANDS_JS = (REPO_ROOT / "static" / "commands.js").read_text(encoding="utf-8")
+BOOT_JS = (REPO_ROOT / "static" / "boot.js").read_text(encoding="utf-8")
+STYLE_CSS = (REPO_ROOT / "static" / "style.css").read_text(encoding="utf-8")
+NODE = shutil.which("node")
+
+
+def _run_commands_js(script_body: str) -> dict:
+    script = textwrap.dedent(
+        f"""
+        const vm = require('vm');
+        const ctx = {{
+          console,
+          URL,
+          URLSearchParams,
+          localStorage: {{ getItem(){{return null;}}, setItem(){{}}, removeItem(){{}} }},
+          t: (key) => key,
+          api: async (path) => {{
+            const url = new URL('http://hermes.local' + path);
+            if (url.pathname !== '/api/workspaces/suggest') {{
+              throw new Error('unexpected api path: ' + path);
+            }}
+            const prefix = url.searchParams.get('prefix');
+            return {{
+              suggestions: prefix === '~/' ? ['~', '~/Documents', '~/Projects'] : []
+            }};
+          }}
+        }};
+        vm.createContext(ctx);
+        vm.runInContext({json.dumps(COMMANDS_JS)}, ctx);
+        (async () => {{
+          const result = await vm.runInContext(`(async () => {{ {script_body} }})()`, ctx);
+          process.stdout.write(JSON.stringify(result));
+        }})().catch(err => {{
+          console.error(err && err.stack || err);
+          process.exit(1);
+        }});
+        """
+    )
+    proc = subprocess.run(
+        [NODE, "-e", script],
+        check=True,
+        capture_output=True,
+        text=True,
+    )
+    return json.loads(proc.stdout)
+
+
+@pytest.mark.skipif(NODE is None, reason="node not on PATH")
+def test_composer_path_token_matches_tilde_path_inside_message():
+    result = _run_commands_js(
+        """
+        return {
+          token: _findComposerPathToken('please inspect ~/Doc', 20),
+          slash: _findComposerPathToken('/model gpt', 10),
+          bareTilde: _findComposerPathToken('please inspect ~', 16)
+        };
+        """
+    )
+
+    assert result["token"] == {"start": 15, "end": 20, "prefix": "~/Doc"}
+    assert result["slash"] is None
+    assert result["bareTilde"] is None
+
+
+@pytest.mark.skipif(NODE is None, reason="node not on PATH")
+def test_composer_path_autocomplete_uses_workspace_suggest_endpoint():
+    result = _run_commands_js(
+        """
+        const matches = await getComposerPathAutocompleteMatches('please inspect ~/', 17);
+        return {
+          count: matches.length,
+          first: matches[0],
+          second: matches[1]
+        };
+        """
+    )
+
+    assert result["count"] == 2
+    assert result["first"]["source"] == "path"
+    assert result["first"]["value"] == "~/Documents"
+    assert result["first"]["tokenStart"] == 15
+    assert result["first"]["tokenEnd"] == 17
+    assert result["second"]["value"] == "~/Projects"
+
+
+def test_composer_input_uses_path_autocomplete_after_slash_branch():
+    assert "const cursor=$('msg').selectionStart;" in BOOT_JS
+    assert "getComposerPathAutocompleteMatches(text,cursor).then(matches=>" in BOOT_JS
+    assert "ta.value!==text||ta.selectionStart!==cursor" in BOOT_JS
+
+
+def test_dropdown_selection_replaces_only_path_token():
+    assert "const isPath=c.source==='path';" in COMMANDS_JS
+    assert "tokenStart:token.start" in COMMANDS_JS
+    assert "tokenEnd:token.end" in COMMANDS_JS
+    assert "current.slice(0,safeStart)+nextPath+current.slice(safeEnd)" in COMMANDS_JS
+    assert "ta.setSelectionRange(pos,pos);" in COMMANDS_JS
+    assert "ta.dispatchEvent(new Event('input',{bubbles:true}));" in COMMANDS_JS
+
+
+def test_path_suggestions_have_distinct_dropdown_style():
+    assert ".cmd-item-path-value" in STYLE_CSS