nao-core 0.2.6

nao Core is your analytics context builder with the best chat interface.

nao CLI

Command-line interface for nao chat.

Installation

Install the core package (lightweight, no database or LLM dependencies):

pip install nao-core

Then add only the providers you need:

# Database backends
pip install 'nao-core[postgres]'
pip install 'nao-core[bigquery]'
pip install 'nao-core[snowflake]'
pip install 'nao-core[duckdb]'
pip install 'nao-core[clickhouse]'
pip install 'nao-core[databricks]'
pip install 'nao-core[mysql]'
pip install 'nao-core[mssql]'
pip install 'nao-core[athena]'
pip install 'nao-core[trino]'
pip install 'nao-core[redshift]'
pip install 'nao-core[fabric]'
pip install 'nao-core[starrocks]'

# LLM providers
pip install 'nao-core[openai]'
pip install 'nao-core[anthropic]'
pip install 'nao-core[mistral]'
pip install 'nao-core[gemini]'
pip install 'nao-core[ollama]'

# Integrations
pip install 'nao-core[notion]'

Combine multiple extras in a single install:

pip install 'nao-core[postgres,openai]'
pip install 'nao-core[snowflake,bigquery,anthropic]'

Or install everything at once (equivalent to the previous default):

pip install 'nao-core[all]'

Convenience groups are also available:

pip install 'nao-core[all-databases]'  # all database backends
pip install 'nao-core[all-llms]'       # all LLM providers

Usage

nao --help
Usage: nao COMMAND

╭─ Commands ────────────────────────────────────────────────────────────────╮
│ chat         Start the nao chat UI.                                       │
│ debug        Test connectivity to configured resources.                   │
│ init         Initialize a new nao project.                                │
│ sync         Sync resources to local files.                               │
│ test         Run and explore nao tests.                                   │
│ --help (-h)  Display this message and exit.                               │
│ --version    Display application version.                                 │
╰───────────────────────────────────────────────────────────────────────────╯

Initialize a new nao project

nao init

This will create a new nao project in the current directory. It will prompt you for a project name and ask you to configure:

• Database connections (BigQuery, DuckDB, Databricks, Snowflake, PostgreSQL, Redshift, MSSQL, Trino, StarRocks)
• Git repositories to sync
• LLM provider (OpenAI, Anthropic, Mistral, Gemini, OpenRouter, Ollama)
• ai_summary template + model (prompted only when you enable ai_summary for databases)
• Slack integration
• Notion integration

The resulting project structure looks like:

<project>/
├── nao_config.yaml
├── .naoignore
├── RULES.md
├── databases/
├── queries/
├── docs/
├── semantics/
├── repos/
├── agent/
│   ├── tools/
│   └── mcps/
└── tests/

Options:

• --force / -f: Force re-initialization even if the project already exists
• --yes / -y / --no-tty: Run non-interactively. Skips all prompts and uses sensible defaults — useful for AI agents and automation scripts. When combined with a pre-written nao_config.yaml (e.g. written by an agent skill), only scaffolds the folder structure.
• --name / -n: Project name. When set without an existing nao_config.yaml, this is used as the project name (and folder). In --yes mode without --name, the current directory name is used and the project is initialized in place.

Non-interactive (agent-friendly) mode

For LLM agents and automation, run nao init without any prompts:

# Initialize the current directory as a nao project (uses the directory name)
nao init --yes

# Or create a new sub-folder named "my-project"
nao init --yes --name my-project

# Pre-write nao_config.yaml then scaffold folders without prompting
cat > nao_config.yaml <<'YAML'
project_name: my-project
databases:
  - type: duckdb
    name: local
    path: ":memory:"
YAML
nao init --yes

In non-interactive mode, nao init never asks for input. Configure databases, LLM provider, and integrations by editing nao_config.yaml directly (or by pre-writing it before nao init).

Start the nao chat UI

nao chat

This will start the nao chat UI. It will open the chat interface in your browser at http://localhost:5005.

Test connectivity

nao debug

Tests connectivity to all configured databases and LLM providers. Displays a summary table showing connection status and details for each resource.

Sync resources

nao sync

Syncs configured resources to local files:

• Databases - generates markdown docs (columns.md, preview.md, description.md) for each table into databases/
• Git repositories — clones or pulls repos into repos/
• Notion pages — exports pages as markdown into docs/notion/

After syncing, any Jinja templates (*.j2 files) in the project directory are rendered with the nao context.

Optional ai_summary generation:

• Add ai_summary to a database connection templates list to render ai_summary.md.
• Use prompt("...") inside Jinja templates to generate ai_summary content.
• prompt(...) requires llm.provider, llm.annotation_model, and llm.api_key (except for ollama).

Run tests

nao test

Runs test cases defined as YAML files in tests/. Each test has a name, prompt, and expected sql. Results are saved to tests/outputs/.

Options:

• --model / -m: Models to test against (default: openai:gpt-4.1). Can be specified multiple times.
• --threads / -t: Number of parallel threads (default: 1)

Examples:

nao test -m openai:gpt-4.1
nao test -m openai:gpt-4.1 -m anthropic:claude-sonnet-4-20250514
nao test --threads 4

Explore test results

nao test server

Starts a local web server to explore test results in a browser UI showing pass/fail status, token usage, cost, and detailed data comparisons.

Options:

• --port / -p: Port to run the server on (default: 8765)
• --no-open: Don't automatically open the browser

BigQuery service account permissions

When you connect BigQuery during nao init, the service account used by credentials_path/ADC must be able to list datasets and run read-only queries to generate docs. Grant the account:

• Project: roles/bigquery.jobUser (or roles/bigquery.user) so the CLI can submit queries
• Each dataset you sync: roles/bigquery.dataViewer (or higher) to read tables

The combination above mirrors the typical "BigQuery User" setup and is sufficient for nao's metadata and preview pulls.

Snowflake authentication

Snowflake supports three authentication methods during nao init:

• SSO: Browser-based authentication (recommended for organizations with SSO policies)
• Password: Traditional username/password
• Key-pair: Private key file with optional passphrase

Development

Building the package

cd cli
python build.py --help
Usage: build.py [OPTIONS]

Build and package nao-core CLI.

╭─ Parameters ──────────────────────────────────────────────────────────────────╮
│ --force -f --no-force              Force rebuild the server binary             │
│ --skip-server -s --no-skip-server  Skip server build, only build Python pkg   │
│ --bump                             Bump version (patch, minor, major)          │
╰───────────────────────────────────────────────────────────────────────────────╯

This will:

1. Build the frontend with Vite
2. Compile the backend with Bun into a standalone binary
3. Bundle everything into a Python wheel in dist/

Installing for development

cd cli
pip install -e '.[all]'

Publishing to PyPI

# Build first
python build.py

# Publish
uv publish dist/*

Architecture

nao chat (CLI command)
    ↓ spawns
nao-chat-server (Bun-compiled binary, port 5005)
  + FastAPI server (port 8005)
    ↓ serves
Backend API + Frontend Static Files
    ↓
Browser at http://localhost:5005