diff --git a/web-ui/package-lock.json b/web-ui/package-lock.json
index ac4ceae6b5..5084f329c0 100644
--- a/web-ui/package-lock.json
+++ b/web-ui/package-lock.json
@@ -23,7 +23,6 @@
         "@sentry/react": "^10.45.0",
         "@tailwindcss/vite": "^4.2.1",
         "@trpc/client": "^11.11.0",
-        "@xterm/addon-clipboard": "^0.2.0",
         "@xterm/addon-fit": "^0.11.0",
         "@xterm/addon-unicode11": "^0.9.0",
         "@xterm/addon-web-links": "^0.12.0",
@@ -3362,15 +3361,6 @@
       "integrity": "sha512-N8tkAACJx2ww8vFMneJmaAgmjAG1tnVBZJRLRcx061tmsLRZHSEZSLuGWnwPtunsSLvSqXQ2wfp7Mgqg1I+2dQ==",
       "license": "MIT"
     },
-    "node_modules/@xterm/addon-clipboard": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/@xterm/addon-clipboard/-/addon-clipboard-0.2.0.tgz",
-      "integrity": "sha512-Dl31BCtBhLaUEECUbEiVcCLvLBbaeGYdT7NofB8OJkGTD3MWgBsaLjXvfGAD4tQNHhm6mbKyYkR7XD8kiZsdNg==",
-      "license": "MIT",
-      "dependencies": {
-        "js-base64": "^3.7.5"
-      }
-    },
     "node_modules/@xterm/addon-fit": {
       "version": "0.11.0",
       "resolved": "https://registry.npmjs.org/@xterm/addon-fit/-/addon-fit-0.11.0.tgz",
@@ -4254,12 +4244,6 @@
         "jiti": "lib/jiti-cli.mjs"
       }
     },
-    "node_modules/js-base64": {
-      "version": "3.7.8",
-      "resolved": "https://registry.npmjs.org/js-base64/-/js-base64-3.7.8.tgz",
-      "integrity": "sha512-hNngCeKxIUQiEUN3GPJOkz4wF/YvdUdbNL9hsBcMQTkKzboD7T/q3OYOuuPZLUE6dBxSGpwhk5mwuDud7JVAow==",
-      "license": "BSD-3-Clause"
-    },
     "node_modules/js-cookie": {
       "version": "2.2.1",
       "resolved": "https://registry.npmjs.org/js-cookie/-/js-cookie-2.2.1.tgz",
diff --git a/web-ui/package.json b/web-ui/package.json
index c947bf0382..db2e512d36 100644
--- a/web-ui/package.json
+++ b/web-ui/package.json
@@ -29,7 +29,6 @@
     "@sentry/react": "^10.45.0",
     "@tailwindcss/vite": "^4.2.1",
     "@trpc/client": "^11.11.0",
-    "@xterm/addon-clipboard": "^0.2.0",
     "@xterm/addon-fit": "^0.11.0",
     "@xterm/addon-unicode11": "^0.9.0",
     "@xterm/addon-web-links": "^0.12.0",
diff --git a/web-ui/src/terminal/persistent-terminal-manager.ts b/web-ui/src/terminal/persistent-terminal-manager.ts
index e74b277f63..bf21e7ee91 100644
--- a/web-ui/src/terminal/persistent-terminal-manager.ts
+++ b/web-ui/src/terminal/persistent-terminal-manager.ts
@@ -1,4 +1,3 @@
-import { ClipboardAddon } from "@xterm/addon-clipboard";
 import { FitAddon } from "@xterm/addon-fit";
 import { Unicode11Addon } from "@xterm/addon-unicode11";
 import { WebLinksAddon } from "@xterm/addon-web-links";
@@ -189,7 +188,13 @@ class PersistentTerminal {
 			rows: initialGeometry.rows,
 		});
 		this.terminal.loadAddon(this.fitAddon);
-		this.terminal.loadAddon(new ClipboardAddon());
+		// Not loading ClipboardAddon intentionally: it relays OSC 52 clipboard-set
+		// requests from whatever CLI is running in the terminal (e.g. Claude Code's
+		// own select-to-copy) into navigator.clipboard.writeText() with no active
+		// user gesture, which corrupts multi-byte CJK text. The addon's own base64
+		// decode is not at fault (verified correct); the Cmd+C handler below calls
+		// the same API but synchronously inside a real keydown event, and is
+		// unaffected. See https://github.com/cline/kanban/issues/574.
 		this.terminal.loadAddon(new WebLinksAddon());
 		this.terminal.loadAddon(this.unicode11Addon);
 		this.terminal.unicode.activeVersion = "11";