Support RTL/BiDi text rendering in CLI output #38524

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1. github-actions

   assigned

   kommander

   on Jul 23, 2026
2. github-actions commented on Jul 23, 2026

   

   github-actionsBot

   on Jul 23, 2026 – with GitHub Actions

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   This issue might be a duplicate of existing issues. Please check:

   • Hebrew/Arabic (RTL) text renders left-to-right in messages and the composer #32726: Hebrew/Arabic (RTL) text renders left-to-right in messages and the composer
   • RTL language support (Persian/Arabic) - characters appear reversed and disconnected #16875: RTL language support (Persian/Arabic) - characters appear reversed and disconnected
   • [FEATURE]: Add RTL (Right-to-Left) language support in the chat panel #26915: [FEATURE] Add RTL (Right-to-Left) language support in the chat panel
   • [FEATURE]: RTL (Arabic) rendering broken in Desktop app: word order, alignment, and table direction — with a fully tested fix recipe #35319: [FEATURE] RTL (Arabic) rendering broken in Desktop app — with a fully tested fix recipe

   Please review those issues to see if your report is already covered, and consider adding any new details there instead.
3. yanivhrs commented on Jul 23, 2026

   

   yanivhrs

   on Jul 23, 2026

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   Related issues check — conclusion:

   Issue	Same root?	Different surface?
   #32726	RTL text renders LTR	Desktop app (Electron/HTML - CSS fix: unicode-bidi: plaintext)
   #26915	RTL support request	Desktop app chat panel (CSS/HTML directional attributes)
   #35319	RTL broken + tested fix recipe	Desktop app renderer (injected CSS/JS via Electron)
   #1685	Unrelated (mouse selection bug)	Text highlighting, not RTL at all

   None are exact duplicates because this issue targets the CLI terminal (stdout TTY rendering — Unicode control characters / UAX#9 reordering), whereas the others all target the Desktop app's HTML/CSS renderer. Same family of problems (BiDi support), different layers of the stack — fixing one won't fix the other.

   If someone wants to take on the Desktop side, #35319 has a thorough, tested fix recipe ready to go.
4. razavioo commented on Jul 29, 2026

   

   razavioo

   on Jul 29, 2026

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   Community plugin available: opencode-rtl

   While waiting for native RTL/BiDi support in the CLI renderer, we built an opencode plugin that tackles this at the plugin layer:

   # Install
   npm install opencode-rtl

   // opencode.json
   {
     "plugin": [
       ["opencode-rtl", { "language": "auto", "isolateAssistantText": "auto", "isolateUserMessages": "auto" }]
     ]
   }

   What it does today:

   • Unicode bidi isolation (RLI/LRI/PDI) for RTL paragraphs, headings, lists, blockquotes, and table cells
   • Inline code spans are LTR-isolated inside RTL text (e.g. fetchData() stays correct inside Persian prose)
   • System prompt injection so the model responds in the user's RTL language
   • Auto-detection of Arabic, Persian, Hebrew, Urdu, Pashto, and more
   • Digit conversion (preserve / latin / arabic-indic / eastern-arabic)

   What it can't do (needs core changes):

   • Right-alignment — Unicode bidi controls character ordering but not paragraph alignment. The TUI renderer would need native dir="rtl" paragraph alignment support.
   • Streaming formatting — experimental.text.complete only fires after the full response. A text.delta or text.partial mutation hook would let plugins format text as it streams.

   Repo: https://github.com/razavioo/opencode-rtl

   Would love to see native BiDi-aware rendering in the CLI output — this plugin is a bridge until then.
5. razavioo commented on Sep 27, 2026

   

   razavioo

   on Sep 27, 2026

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   Until native BiDi support lands in OpenCode's TUI renderer, the opencode-rtl plugin provides a working solution.

   It wraps RTL text segments with Unicode bidi isolates (U+2067 RLI / U+2069 PDI), handles mixed LTR/RTL content (code blocks, tables, inline code), and rewrites the assistant's SSE stream so model output renders correctly in bidi-capable terminals.

   Works with OpenCode 1.x (0.1.9) and OpenCode 2.x (1.0.0).

   // opencode.jsonc (OpenCode 2)
   {
     "plugins": [{ "package": "opencode-rtl", "options": { "language": "auto" } }]
   }
6. neriousy commented on Oct 1, 2026

   

   neriousy

   on Oct 1, 2026

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   Closing as a duplicate of #16875. Same request: RTL/BiDi rendering in the terminal UI. Tracking in #16875.
7. neriousy

   closed this as a duplicateof RTL language support (Persian/Arabic) - characters appear reversed and disconnected #16875 on Oct 1, 2026