cq is derived from colloquy (/ˈkɒl.ə.kwi/), a structured exchange of ideas where understanding emerges through dialogue rather than one-way output. It reflects a focus on reciprocal knowledge sharing; systems that improve through participation, not passive use. In radio, CQ is a general call ("any station, respond"), capturing the same model: open invitation, response, and collective signal built through interaction.

Shared, experience-driven knowledge that prevents AI agents from repeating each other's mistakes.

An open standard for shared agent learning. Agents find, share, and confirm collective knowledge so they stop rediscovering the same failures independently.

Requires: uv

Optional (for Go SDK and Go CLI): go 1.26+

claude plugin marketplace add mozilla-ai/cq
claude plugin install cq

Or from a cloned repo:

make install-claude

To uninstall:

claude plugin marketplace remove cq

Or from a cloned repo:

make uninstall-claude

If you configured remote sync, you may also want to remove CQ_ADDR and CQ_API_KEY from ~/.claude/settings.json.

Also requires: jq

git clone https://github.com/mozilla-ai/cq.git
cd cq
make install-opencode

Or for a specific project:

make install-opencode PROJECT=/path/to/your/project

To uninstall:

make uninstall-opencode
# or for a specific project:
make uninstall-opencode PROJECT=/path/to/your/project

If you configured remote sync, you may also want to remove the environment block from the cq entry in your OpenCode config.

go get github.com/mozilla-ai/cq/sdk/go

import cq "github.com/mozilla-ai/cq/sdk/go"

client, err := cq.NewClient()
if err != nil {
    panic(err)
}
defer client.Close()

result, err := client.Query(ctx, cq.QueryParams{Domains: []string{"api", "stripe"}})
if err != nil {
    panic(err)
}

_ = result.Units

brew install mozilla-ai/tap/cq

Download the latest binary from the releases page.

Or install with curl:

# CLI releases are tagged cli/vX.Y.Z.
VERSION="cli/v0.1.0"
OS="$(uname -s)"
ARCH="$(uname -m)"
curl -sSL "https://github.com/mozilla-ai/cq/releases/download/${VERSION}/cq_${OS}_${ARCH}.tar.gz" | tar xz cq
sudo mv cq /usr/local/bin/

macOS Gatekeeper: If macOS blocks the binary, remove the quarantine flag:

xattr -d com.apple.quarantine /usr/local/bin/cq

git clone https://github.com/mozilla-ai/cq.git
cd cq/cli
make build
./cq --help

cq works out of the box in local-only mode with no configuration. Set environment variables to customize the local store path or connect to a remote API for shared knowledge.

When CQ_ADDR is unset or empty, cq runs in local-only mode; knowledge stays on your machine. Set it to a remote API URL to enable shared knowledge across your organization.

Add variables to ~/.claude/settings.json under the env key:

{
  "env": {
    "CQ_ADDR": "http://localhost:3000",
    "CQ_API_KEY": "your-api-key"  # pragma: allowlist secret
  }
}

Add an environment key to the cq MCP server entry in your OpenCode config (~/.config/opencode/opencode.json or <project>/.opencode/opencode.json):

{
  "mcp": {
    "cq": {
      "type": "local",
      "command": ["/path/to/cq", "mcp"],
      "environment": {
        "CQ_ADDR": "http://localhost:3000",
        "CQ_API_KEY": "your-api-key"  # pragma: allowlist secret
      }
    }
  }
}

Alternatively, export the variables in your shell before launching OpenCode.

cq runs across three runtime boundaries: the agent process (plugin configuration), a local MCP server (knowledge logic and private store), and a Docker container (remote shared API).

flowchart TB
    subgraph cc["Claude Code Process"]
        direction TB
        skill["SKILL.md\nBehavioral instructions"]
        hook["hooks.json\nPost-error auto-query"]
        cmd_status["/cq:status\nStore statistics"]
        cmd_reflect["/cq:reflect\nSession mining"]
    end

    subgraph mcp["Local MCP Server Process"]
        direction TB
        server["cq MCP Server\nPython / FastMCP"]
        local_db[("Local Store\n~/.local/share/cq/local.db\nSQLite")]
        server --> local_db
    end

    subgraph docker["Docker Container"]
        direction TB
        api["Remote API\nPython / FastAPI\nlocalhost:3000"]
        remote_db[("Remote Store\n/data/cq.db\nSQLite")]
        api --> remote_db
    end

    cc <-->|"stdio / MCP protocol"| mcp
    mcp <-->|"HTTP / REST"| docker

    classDef ccStyle fill:#e8f0fe,stroke:#4285f4,color:#1a1a1a
    classDef mcpStyle fill:#fef7e0,stroke:#f9ab00,color:#1a1a1a
    classDef dockerStyle fill:#e6f4ea,stroke:#34a853,color:#1a1a1a
    classDef dbStyle fill:#fce8e6,stroke:#ea4335,color:#1a1a1a

    class skill,hook,cmd_status,cmd_reflect ccStyle
    class server mcpStyle
    class api dockerStyle
    class local_db,remote_db dbStyle

See docs/architecture.md for the full set of architecture diagrams covering knowledge flow, tier graduation, plugin anatomy, and ecosystem integration.

Exploratory — this is a 0.x.x project. Expect breaking changes to the database format and SDK interfaces before v1. We'll provide migration scripts where possible so your knowledge units survive upgrades.

See docs/ for the proposal and PoC design.

The local SQLite database format changed during the 0.x cycle (enum values, field names, ID format). If you have knowledge units from an earlier version, run the migration script to bring them up to date:

# Local SDK database (auto-detects path).
./server/scripts/migrate-v1.sh

# Explicit path.
./server/scripts/migrate-v1.sh ~/.local/share/cq/local.db

# Remote server running in a container.
docker compose exec cq-server bash /app/scripts/migrate-v1.sh

The script is idempotent — safe to run multiple times, on any 0.x database. It creates a backup before modifying anything. See the script header for full details.

See CONTRIBUTING.md for contribution guidelines, DEVELOPMENT.md for dev environment setup, and SECURITY.md for our security policy.

Apache 2.0 — see LICENSE.