Obsidian community plugin: WASM-powered semantic search

Summary

Obsidian community plugin that provides deterministic semantic search powered by terraphim's Aho-Corasick automata, compiled to WASM and running entirely in Obsidian's Electron runtime. Zero network, zero LLM, zero API key.

Architecture

Obsidian Plugin (TypeScript)
    |
    v
@terraphim/autocomplete (WASM)  <-- already exists as npm package
    |
    v
terraphim_automata (Rust -> WASM)  <-- already compiles to wasm32
    |
    v
User's vault (markdown files)

Existing WASM Infrastructure

• terraphim_types has typescript + wasm features (tsify + wasm-bindgen)
• terraphim_automata has typescript + wasm features
• terraphim_ai_nodejs exists as Node.js native bindings
• @terraphim/autocomplete is published on npm

Plugin Features

Core

• Command palette: "Terraphim: Search concepts" -- type a term, get synonym-expanded results
• Sidebar panel: persistent search with result list linking to vault files
• Status bar: concept count and last build timestamp

Configuration

• Settings tab:
  • Vault path (auto-detected)
  • Format: obsidian (default) / logseq / terraphim
  • Synonym property name (default: aliases for obsidian, synonyms for logseq)
  • Rebuild trigger: on file change / manual / on startup
  • Custom KG directory (optional, for dedicated concept files)

Integration

• Clicking a search result opens the file in Obsidian
• Results show: concept name, matched synonym, file path, relevance score
• Works with Obsidian's aliases: frontmatter natively (#604)
• Respects .obsidian/ exclusions

Development Plan

1. Scaffold Obsidian plugin with obsidian-sample-plugin template
2. Bundle @terraphim/autocomplete WASM module
3. On startup: walk vault files, build thesaurus from aliases: + synonyms:: + #tags
4. Register command palette action for search
5. Register sidebar panel for persistent search
6. File watcher for incremental thesaurus rebuild
7. Settings UI

Submission to Community Registry

• Obsidian requires: GitHub repo, manifest.json, versions.json, main.js
• Review process: ~2-4 weeks
• Must follow: https://docs.obsidian.md/Plugins/Releasing/Submit+your+plugin
• Plugin must work without network access (we already do)

Affected Crates / Packages

• terraphim_automata (ensure WASM build is up to date)
• terraphim_ai_nodejs (may need to update WASM bindings)
• New repo or directory: terraphim-obsidian-plugin

Estimated Effort

~2 days (scaffolding + WASM integration + settings + testing)

Dependencies

• #604 Obsidian format parser (parse aliases: and wikilinks)

Part of

Epic #603

Start with the obsidian-sample-plugin template and inspect the published @terraphim/autocomplete package, the existing WASM features, and dependency #604. Map the planned vault scanning, search UI, settings, and file-watcher work before implementation. Done includes the required manifest.json, versions.json, main.js, tests, and an offline plugin suitable for registry submission.