diff --git a/docs/terminal-rendering.md b/docs/terminal-rendering.md
index 6b060c76..8bed16a3 100644
--- a/docs/terminal-rendering.md
+++ b/docs/terminal-rendering.md
@@ -63,8 +63,6 @@ parent's negative pull.
 | `.tool-result` (flat) | `←  <txt>` | muted | short `tool_result` (≤120c, non-recv) | stream-json |
 | `.tool-result-block` `<details>` | `Nl · headline` | muted, body is text | long generic `tool_result` | stream-json |
 | `.tool-result-block` `<details open>` | `recv ← <txt>` | muted, body is markdown | `tool_result` correlated to a prior `recv` tool_use via id | stream-json |
-| `.tool-result.error` (flat) | `✗  <msg>` | red | `tool_result` with `is_error: true` (≤120c); `<tool_use_error>` wrapper stripped | stream-json |
-| `.tool-result-block.error` `<details>` | `Nl · headline` | red, body is text | long error `tool_result` (`is_error: true`); wrapper stripped | stream-json |
 | `.tool-use` | `⌁  task <id> started · <desc> [type]` | cyan | claude Task-tool subagent start (dead path — `Task` omitted from agent allow-list) | `renderTaskEvent` |
 | `.turn-end-ok` / `.turn-end-fail` / `.tool-result` | `⌁  task <id> ✓/✗/◌ <status> · <desc> · → <output_file>` | green / red / muted | claude Task-tool result (dead path for agents) | `renderTaskEvent` |
 | `.note` | `· <text>` | muted | harness chatter | `LiveEvent::Note` |
diff --git a/frontend/packages/agent/src/app.js b/frontend/packages/agent/src/app.js
index 12a2085a..afd9abc9 100644
--- a/frontend/packages/agent/src/app.js
+++ b/frontend/packages/agent/src/app.js
@@ -1684,16 +1684,9 @@ window.marked = marked;
     // grows with the session — entries are tiny strings.
     const toolNameById = new Map();
     function renderToolResult(c, api) {
-      const rawTxt = Array.isArray(c.content)
+      const txt = Array.isArray(c.content)
         ? c.content.map(p => p.text || '').join('')
         : (c.content || '');
-      // Strip the <tool_use_error>…</tool_use_error> wrapper that claude
-      // emits when a tool call fails — the tags are an implementation detail
-      // and add noise to the terminal display.
-      const isError = !!c.is_error;
-      const txt = isError
-        ? rawTxt.replace(/^<tool_use_error>([\s\S]*)<\/tool_use_error>$/, '$1').trim()
-        : rawTxt;
       const sourceName = c.tool_use_id ? toolNameById.get(c.tool_use_id) : null;
       const isMessageBearing = sourceName === 'mcp__hyperhive__recv';
       // When an ask's tool_result lands the broker has just
@@ -1714,14 +1707,6 @@ window.marked = marked;
         const headline = trimmed.slice(0, 90) + '…';
         return `${lines}L · ${headline}`;
       })();
-      if (isError) {
-        if (!txt.trim() || txt.length <= 120) {
-          api.row('tool-result error', '✗  ' + summaryBody);
-        } else {
-          api.details('tool-result-block error', summaryBody, txt);
-        }
-        return;
-      }
       // Flat row: keep the `←` glyph in the prefix column. Details rows
       // drop it — the `▸/▾` disclosure marker sits in that column via CSS.
       if (isMessageBearing && txt.trim()) {
diff --git a/frontend/packages/shared/src/terminal.css b/frontend/packages/shared/src/terminal.css
index 01d4a906..4beb8a1c 100644
--- a/frontend/packages/shared/src/terminal.css
+++ b/frontend/packages/shared/src/terminal.css
@@ -120,9 +120,7 @@
 .live .text        { color: var(--fg);    }
 .live .thinking    { color: var(--muted); font-style: italic; }
 .live .tool-use    { color: var(--cyan);  }
-.live .tool-result              { color: var(--muted); }
-.live .tool-result.error        { color: var(--red);   }
-.live .tool-result-block.error  { color: var(--red);   }
+.live .tool-result { color: var(--muted); }
 .live .result      { color: var(--green); }
 .live .note        { color: var(--muted); }
 /* Distinguish stderr lines (orange) and operator-initiated notes