RuDS/RUST_PLAN_EXTENSION.md

bDS Rust Rewrite — Extension Plan

Goal

Deliver the rest of current-app parity and the advanced tooling that is valuable, but not required to ship a production-capable Rust replacement for everyday authoring and publishing.

Extensions begin only after the core plan is already usable end to end.

Extension Principles

1. No extension may break the core compatibility contract.
2. Extensions must reuse core models, engines, and persistence rules rather than invent parallel formats.
3. UI features must still be tied to underlying functionality; no placeholder shells.
4. AI features remain gated by offline mode and must prefer local models or provide explicit user feedback when unavailable. One-shot AI operations (6 operations: translate post/media, image alt text, post analysis, taxonomy analysis, language detection) are part of core with two configurable OpenAI-compatible endpoints (online + airplane mode), and respect the same offline gating.
5. Extensions use the same Iced + muda + rfd platform stack as core. No additional UI frameworks.

Extension Buckets

Bucket A: Git And Validation Tooling

Scope

• GitEngine via git2 crate (shell out for LFS operations — no LFS library binding)
• Git sidebar
• diff view
• commit, fetch, pull, push
• richer site validation views
• richer metadata diff UI

Why extension

Helpful for operators, but not required to create, preview, generate, and publish content.

Done when

• users can inspect repo state and diffs from within the app
• Git actions work reliably enough to replace the current Git tooling

Bucket B: Import And Migration Tooling

Scope

• WXR parser
• import analysis
• import execution
• saved import definitions

Why extension

Important onboarding feature, but not required to operate existing bDS projects.

Done when

• WordPress import flows are usable and recoverable
• import results match the current app's expectations closely enough for fixture-based tests

Bucket C: AI Chat And Tool Use

Scope

• chat UI (sidebar panel with conversation history)
• streaming responses via reqwest (SSE / chunked transfer)
• tool use against local engines (post lookup, media search, template info, etc.)
• multi-turn conversation management
• model and credential settings UI (extends the core AI endpoint configuration)

One-shot AI operations (translation, image alt text, title suggestion) are already in core scope. This bucket adds the interactive, conversational AI layer on top.

The AI client extends the core reqwest + serde_json client with streaming support and tool-call parsing. Works with any OpenAI-compatible endpoint: OpenAI, Anthropic-via-proxy, local Ollama, etc.

Hard constraints

• offline mode gates all automatic AI work
• cloud providers are disabled when offline mode is enabled
• local providers remain usable when allowed
• unavailable operations produce explicit user-visible feedback

Done when

• AI chat is useful for content-related queries and actions without weakening the app's offline guarantees
• Streaming and tool use work reliably with at least one OpenAI-compatible provider

Bucket D: Search, Embeddings, And Duplicate Detection

Scope

• ONNX embeddings via ort (ONNX Runtime Rust bindings)
• HNSW vector index via usearch
• semantic search UI
• duplicate detection UI

Why extension

Improves discovery and cleanup, but not required for core publishing flows.

Done when

• near-duplicate detection and semantic search are trustworthy on real projects

Bucket E: Translation QA And Documentation UX

Scope

• translation validation engine and report view
• in-app documentation browser
• richer scripting docs browser and examples

Why extension

Operationally valuable, but the core release can ship with generated markdown docs and without dedicated browsing surfaces.

Done when

• translation integrity issues are discoverable before publish
• docs are comfortably browsable in-app

Bucket F: Menu Editing And Deep Links

Scope

• menu editor UI for OPML/menu documents
• deep-link protocol handling beyond core app-open behaviors

Why extension

Core must read menu documents for rendering compatibility, but editing them can follow once the main authoring path is stable.

Done when

• users can inspect and edit menus from the Rust app
• deep links cover parity flows from the current app

Bucket G: MCP And Automation Surfaces

Scope

• headless CLI maturation
• MCP server
• remote automation contracts
• NotificationWatcher / db_notifications mechanism for CLI-to-app synchronization

Why extension

Useful ecosystem surface, not required to replace the desktop app itself.

Done when

• automation consumers can drive the Rust app safely and consistently
• CLI changes are detected and surfaced to the running desktop app

Bucket H: Blogmark And Transform Pipeline

Scope

• BlogmarkTransformService
• external content capture (bookmarklet) workflow
• transform script execution chain
• integration with Lua transform scripts

Why extension

Secondary content-capture workflow. Not required for core authoring with existing projects.

Done when

• external content can be captured and transformed into posts via the Blogmark pipeline
• transform scripts execute reliably

Bucket I: Rich Markdown Editor

Scope

• WYSIWYG or hybrid markdown editing (similar to current Milkdown editor)
• macro syntax preview in editor
• image insert dialog from linked media

Why extension

Core ships with the bds-editor syntax-highlighting plain-text editor and live preview. The current app defaults to a Milkdown WYSIWYG editor, so this is a user-facing regression that should be addressed after core stabilizes.

Architecture advantage

The bds-editor crate (ropey + syntect + cosmic-text) built during core provides the foundation for the rich editor. Incremental additions:

• inline rendering of bold/italic/headers via cosmic-text mixed font styles
• inline image preview via Iced image rendering within the custom widget
• macro block preview (render macro output inline in the editor)
• clickable links

This is an evolution of the existing editor widget, not a separate technology decision.

Done when

• users can edit content with a rich editor comparable to the current app's Milkdown experience

Bucket J: A2UI Server-Driven Surfaces

Scope

• A2UI component renderer (layout, input, display, chart, etc.)
• A2UI surface manager for bidirectional data flow
• integration with AI assistant outputs

Why extension

Tightly coupled to the AI feature set (Bucket C). Not required until AI features are active.

Done when

• AI-generated dynamic UI surfaces render correctly in the app

Suggested Extension Ordering

Bucket A Git + Validation
  ↓
Bucket B Import
  ↓
Bucket C AI
  ↓
Bucket D Embeddings + Duplicates
  ↓
Bucket E Translation QA + Docs UX
  ↓
Bucket F Menu Editing + Deep Links
  ↓
Bucket G MCP + Automation
  ↓
Bucket H Blogmark + Transforms
  ↓
Bucket I Rich Editor (builds on bds-editor from core)
  ↓
Bucket J A2UI Surfaces (after Bucket C)

The ordering is pragmatic, not mandatory. Git and validation are the closest to operational parity, so they should land first after core.

Extension Verification

Every extension still inherits the core verification baseline plus extension-specific tests:

• Git fixtures for repo state and diff rendering
• WXR fixtures for import
• mocked SSE and provider fixtures for AI
• embedding fixtures for semantic search and duplicate detection
• translation fixture projects with intentional integrity failures
• OPML fixtures for menu editing

Out Of Scope For Now

• cross-platform packaging polish beyond what the core and extension work naturally require
• feature work that introduces new persistence formats before full parity is reached