Semantic Search

Local-first semantic search plugin for OpenCode, with smart grep routing and incremental indexing.

Quickstart

Prerequisites

• Bun 1.1+
• OpenCode
• ripgrep (rg)
• Either Ollama or an OpenAI-compatible embedding API

Install

Option A — bunx (recommended after the package is on npm)

Runs the same installer as install.sh from the published package (no clone):

# Global shim (~/.config/opencode/plugins) — default
bunx opencode-semantic-search@latest

# Project-local only (./.opencode/plugins)
bunx opencode-semantic-search@latest install --local

Other flags match install.sh (see below).

Option B — Remote install.sh (curl)

curl -fsSL https://raw.githubusercontent.com/jainprashul/opencode-semantic-search/main/install.sh | bash

Use bash -s -- --local after the pipe for a project-local shim instead of the default global install.

Option C — Git clone

git clone https://github.com/jainprashul/opencode-semantic-search.git
cd opencode-semantic-search

# Global (default): ~/.config/opencode/plugins
bash install.sh

# Project-local only: ./.opencode/plugins
bash install.sh --local

Common installer modes (clone or remote script):

# explicit global install (default)
bash install.sh --global

# project-local only
bash install.sh --local

# OpenAI embeddings instead of Ollama
bash install.sh --openai-key-env OPENAI_API_KEY --skip-ollama

# custom Ollama model
bash install.sh --ollama-model nomic-embed-text

# skip Ollama checks/model pull
bash install.sh --skip-ollama

The script installs dependencies, writes a plugin shim, optionally pulls the Ollama model, writes config, and runs integration self-tests when the test scripts are present (git clone); npm installs skip that step.

Start

# Ollama users
ollama serve

# open your codebase
cd /path/to/your/repo
opencode

Available tools

• semantic_search(query, top_k?, threshold?, path?)
• grep(pattern|query, ...) smart route: conceptual -> semantic, exact/regex -> rg
• index_status() health and coverage stats
• reindex() full index rebuild
• diagnostic_bundle() JSON support bundle (provider, index, routing history)

Optional slash aliases (/sem-status, /sem-search, etc.): add Markdown stubs under .opencode/commands/ as described in SETUP.md. Each stub body is an LLM prompt that asks the assistant to call the matching tool.

Verify it works

From this plugin repo:

bun run check
bun run test:integration
bun run diagnostic:bundle

Expected:

• bun run check exits successfully (no TypeScript errors).
• bun run test:integration prints JSON with "ok":true from both suites.
• bun run diagnostic:bundle prints one JSON bundle with provider health, index stats, DB path, and recent routing outcomes.

In OpenCode (after startup indexing):

• index_status() should report provider_healthy: true, files_indexed > 0, total_chunks > 0.
• semantic_search("authentication flow") should return JSON results with file paths and scores.
• grep("auth retry flow") should return scored semantic matches (score=...) when provider/index are healthy.

Debugging pointers

• No semantic results: ensure embedder is reachable (ollama serve or valid OpenAI key) and run reindex().
• grep behaving like plain text search: this is expected for exact/regex/single-token patterns.
• Wrong results after changing embedding model/dimensions: run reindex().
• Persistent index issues: remove the project DB under ~/.cache/opencode/semantic-search/<project-hash>/embeddings.db.

Publishing (maintainers)

Bump version in package.json, then:

bun run typecheck
npm publish --access public

prepublishOnly runs typecheck automatically. The npm package name is opencode-semantic-search.

Docs

• docs/ARCHITECTURE.md architecture, data flow, index lifecycle, smart grep routing
• docs/CONFIG.md full configuration reference + install script behavior
• docs/DEBUGGING.md logging/diagnostics, troubleshooting, and verification playbook
• SETUP.md extended setup walkthrough and notes