Markstream Angular

Use this skill when the host app is Angular and the task is to adopt the Angular package cleanly.

Workflow

1. Confirm the repo is Angular 20 or newer and accepts an alpha renderer API.
2. Install markstream-angular plus only the requested optional peers.
3. Import markstream-angular/index.css from the app shell.

• Add katex/dist/katex.min.css when math is enabled.

1. Prefer standalone Angular integration.

• Use MarkstreamAngularComponent in imports and keep examples signal-friendly.

1. Start with [content].

• For streaming AI chat, keep [content] and use built-in smooth streaming first.
• [smoothStreaming]="'auto'" is the default and activates when [typewriter]="true" or [maxLiveNodes]="0".
• [typewriter] only controls the blinking cursor and defaults to false.
• [fade] controls node enter and streamed-text fade animations and defaults to true.
• Streaming vs recovering history: in chat UIs the same component starts streaming and later switches to history when [final]="true".
• Streaming: [smoothStreaming]="'auto'", [fade]="false", [typewriter]="true". This is a conservative visual/performance choice, not an API incompatibility. This adapter has not adopted Vue 3's bounded append fades, so verify its animation behavior before enabling both.
• Recovering history: [smoothStreaming]="false", [fade]="true", [typewriter]="false". Content is already complete — pacing would slow it down, but fade gives a polished entry animation.
• Dynamic switch: [smoothStreaming]="isStreaming ? 'auto' : false", [fade]="!isStreaming".
• Use [final] for end-of-stream state; final parsing is gated until visible content catches up when smooth streaming is active.
• Move to nodes + final only for worker-preparsed content, shared AST stores, or custom AST control.
• Remember that [htmlPolicy] now defaults to 'safe', and Mermaid strict mode is on by default through [mermaidProps].

1. Use [customHtmlTags] and [customComponents] for trusted tag workflows.
2. Validate with the smallest useful Angular dev or build command.

Default Decisions

• Standalone Angular first, NgModule-era patterns only when the repo still depends on them.
• Treat the cursor as opt-in (typewriter=false by default), but keep fade animations enabled by default (fade=true).
• Keep optional peers minimal and explicit.
• Keep [htmlPolicy]="'safe'" and Mermaid strict mode unless the task is preserving trusted legacy rendering.
• If a trusted surface needs broader old behavior, opt out locally with [htmlPolicy]="'trusted'" and [mermaidProps]="{ isStrict: false }", and document that trust boundary.

Useful Doc Targets

• docs/guide/angular-quick-start.md
• docs/guide/angular-installation.md
• docs/guide/playground.md
• docs/guide/troubleshooting.md