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@byline/ai

v4.12.0

Published

Byline CMS AI subsystem.

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Links

Git

Maintainers

daveamayombodaveamayomboinfonomic2infonomic258bits58bits

Keywords

aicmsheadless cmscontent management

Readme

@byline/ai

The AI subsystem for Byline CMS — provider-agnostic text generation and structured editing for the admin editor, with built-in editor plugins for the text and Lexical richtext fields.

This package is part of Byline CMS — a developer-friendly, open-source headless CMS with versioning, editorial workflow, and content translation as first-class concerns.

What it provides

  • Provider-agnostic execution — a single ExecuteInstruction contract over OpenAI, Google (Gemini), and Anthropic, with non-streaming and streaming variants (executeInstruction / executeInstructionStreaming).
  • Structured generation — generateStructured / generateStructuredStreaming for schema-constrained output.
  • Patch generation — patch / patchStreaming, which edit an ordered array of Lexical text nodes in place (used by the richtext field's AI drawer).
  • Editor plugins — drop-in plugins for the two editor surfaces: @byline/ai/plugins/text (AiPluginText) and @byline/ai/plugins/lexical (AiPluginLexical, AiLexicalExtension, TOGGLE_AI_DRAWER_COMMAND).
  • Browser-safe config — a public config provider and provider/model helpers that carry no server SDK dependencies.

Browser / server split

The root entry is browser-safe; the SDK-backed execution code lives behind a separate server entry. Import from the right one:

| Entry | Use from | Surface | |---|---|---| | @byline/ai | Browser and server | Types, AiPublicConfigProvider / useAiPublicConfig, provider/model helpers (PROVIDERS, DEFAULT_MODELS, getDefaultModel, …), INSTRUCTION_MODES | | @byline/ai/server | Server only | executeInstruction(Streaming), generateStructured(Streaming), patch(Streaming), getAiServerConfig | | @byline/ai/plugins/text | Browser | AiPluginText | | @byline/ai/plugins/lexical | Browser | AiPluginLexical, AiLexicalExtension, TOGGLE_AI_DRAWER_COMMAND |

Importing @byline/ai/server in the browser will crash — it pulls in the Anthropic/OpenAI/Google SDKs and pino. Host adapters mount the execute endpoint on the server and the plugins POST ExecuteInstruction payloads to it; see the host integration in @byline/host-tanstack-start (integrations/byline-ai.tsx, server-fns/ai/*).

Configuration

Server config is read from the environment by getAiServerConfig():

| Variable | Purpose | Default | |---|---|---| | AI_DEFAULT_PROVIDER | openai | google | anthropic | openai | | OPENAI_API_KEY / OPENAI_BASE_URL | OpenAI credentials | — | | GOOGLE_API_KEY / GOOGLE_BASE_URL | Google (Gemini) credentials | — | | ANTHROPIC_API_KEY / ANTHROPIC_BASE_URL | Anthropic credentials | — | | BYLINE_AI_ENDPOINT | Endpoint the editor plugins POST to | /admin/api/ai/execute | | LOG_LEVEL / LOG_PRETTY | Logging | info |

The curated per-provider model lists live in src/config/ai-config.ts (PROVIDER_MODELS / DEFAULT_MODELS). Run pnpm list:models to discover the models a provider currently exposes.

Documentation

For the full architecture overview, the richtext/AI integration, and getting started instructions, see the main repository: https://github.com/Byline-CMS/bylinecms.dev. Relevant docs: docs/04-collections/07-rich-text.md, docs/04-collections/01-fields.md, and docs/05-reading-and-delivery/05-mcp-server.md.

License

MPL-2.0