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cannot render plantuml in markdown preview #8330

@yosse95ai

Description

@yosse95ai

Before opening, please confirm:

Operating System

macOS 15.7.3

Kiro Version

0.12.155

Bug Description

I'm using the "Markdown All in One" extension to render Markdown. While the same Markdown file renders correctly in VSCode, Kiro renders it as a code block within the Markdown, even though I'm using the same settings and the same file.

Setting:

Image

Kiro:

Image

VSCode:

Image

Steps to Reproduce

  1. Install https://marketplace.visualstudio.com/items?itemName=yzhang.markdown-all-in-one
  2. Create markdown file
  3. Write plantuml code
    @startuml FL-01
    actor User
    participant "DP-1\n(Next.js SSR)" as SSR
    participant "Cognito" as Cognito
    participant "Browser" as Browser
    participant "DP-1\n(Next.js CSR)" as CSR
    
    User -> SSR: ログイン画面表示
    User -> Cognito: email + password
    Cognito -> User: MFA_REQUIRED (TOTP challenge)
    User -> Cognito: TOTP code
    Cognito -> SSR: JWT Tokens (ID, Access, Refresh)
    SSR -> Browser: httpOnly Cookie\n(Secure, SameSite=Strict)
    Browser -> CSR: RAG Chat ダッシュボード
    @enduml
  4. Open preview

Expected Behavior

We also want PlantUML to render in Kiro's Markdown preview mode.

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    extensionsIssues related to extension on kiro and Open VSX registry https://open-vsx.org/os: macpending-maintainer-responseIssue is pending a response from the Kiro teampending-triageui

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