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Use when the user asks to inspect schemas, run SQL, browse tables, analyze data quality, generate ER diagrams, or work with PostgreSQL, MySQL, MariaDB, TiDB, SQLite, MongoDB, Redis, ClickHouse, Elasticsearch, or DuckDB." +license: Apache-2.0 +metadata: + author: clidey + version: "0.106.0" +compatibility: "Requires Node.js (npx) or the whodb-cli binary installed." +--- + +# WhoDB + +Query databases, explore schemas, analyze data quality, and get optimization recommendations through the WhoDB MCP server. + +## Setup + +If the WhoDB MCP server is not connected, set it up: + +1. Add the MCP server (npx, no install needed): + ```bash + codex mcp add whodb -- npx -y @clidey/whodb-cli mcp serve + ``` + +2. Or if `whodb-cli` is installed locally: + ```bash + codex mcp add whodb -- whodb-cli mcp serve + ``` + +3. Configure database connections via environment variables: + ```bash + export WHODB_POSTGRES='[{"alias":"prod","host":"localhost","user":"user","password":"pass","database":"mydb","port":"5432"}]' + export WHODB_MYSQL_1='{"alias":"dev","host":"localhost","user":"user","password":"pass","database":"devdb","port":"3306"}' + ``` + +After adding the MCP server, restart Codex. + +## Available MCP Tools + +### whodb_connections +List all available database connections. +``` +No parameters required. +Returns: connection names with type and source (env/saved). +``` + +### whodb_schemas +List schemas in a database. +``` +Parameters: +- connection: Connection name (optional if only one exists) +``` + +### whodb_tables +List tables in a schema. +``` +Parameters: +- connection: Connection name (optional) +- schema: Schema name (optional, uses default) +``` + +### whodb_columns +Describe table columns and types. +``` +Parameters: +- connection: Connection name (optional) +- table: Table name (required) +- schema: Schema name (optional) +``` + +### whodb_query +Execute SQL queries with security validation. +``` +Parameters: +- connection: Connection name (optional) +- query: SQL query to execute +``` + +### whodb_explain +Run EXPLAIN for a SQL query. +``` +Parameters: +- connection: Connection name (optional) +- query: SQL query to analyze +``` + +### whodb_erd +Load graph/relationship metadata for ER diagrams. +``` +Parameters: +- connection: Connection name (optional) +- schema: Schema name (optional) +``` + +### whodb_diff +Compare schema metadata between two connections. +``` +Parameters: +- source: Source connection name (required) +- target: Target connection name (required) +``` + +### whodb_audit +Run data quality audits on a table. +``` +Parameters: +- connection: Connection name (optional) +- table: Table name (required) +- schema: Schema name (optional) +``` + +### whodb_suggestions +Load backend-generated query suggestions for a connection. +``` +Parameters: +- connection: Connection name (optional) +- schema: Schema name (optional) +``` + +### whodb_confirm +Confirm a pending write operation (only available in confirm-writes mode, which is the default). +``` +Parameters: +- token: Confirmation token from a pending write +``` + +### whodb_pending +List pending confirmation tokens. +``` +No parameters required. +``` + +## Standard Workflow + +### Step 1: Discover connections +``` +whodb_connections → list available databases +``` + +### Step 2: Explore schema +``` +whodb_schemas(connection="name") → list schemas +whodb_tables(connection="name", schema="public") → list tables +whodb_columns(connection="name", table="users") → column details +``` + +### Step 3: Query data +``` +whodb_query(connection="name", query="SELECT * FROM users LIMIT 10") +``` + +### Step 4: Analyze (as needed) +``` +whodb_explain(connection="name", query="SELECT ...") → query plan +whodb_erd(connection="name") → table relationships +whodb_audit(connection="name", table="users") → data quality +whodb_diff(source="prod", target="staging") → schema comparison +``` + +## Query Building + +When converting natural language to SQL: + +1. Always check schema first with `whodb_tables` and `whodb_columns` +2. Match entities to table names, attributes to column names +3. Identify foreign key joins from column metadata +4. Use LIMIT for exploratory queries (default: 100) + +### Date handling varies by database + +| Intent | PostgreSQL | MySQL | SQLite | +|--------|-----------|-------|--------| +| Last 7 days | `>= NOW() - INTERVAL '7 days'` | `>= DATE_SUB(NOW(), INTERVAL 7 DAY)` | `>= DATE('now', '-7 days')` | +| Start of month | `>= DATE_TRUNC('month', CURRENT_DATE)` | `>= DATE_FORMAT(NOW(), '%Y-%m-01')` | `>= DATE('now', 'start of month')` | + +## Security Modes + +The MCP server defaults to confirm-writes mode (writes require confirmation via `whodb_confirm`). + +- `--read-only`: blocks all write operations +- `--safe-mode`: read-only + strict security validation +- `--allow-write`: full write access without confirmation + +## Safety Rules + +- Always explore schema before writing queries +- Use LIMIT for exploratory queries +- Prefer specific columns over SELECT * +- Never generate DELETE, UPDATE, or DROP unless explicitly requested +- Never expose or log credentials +- Use connection names, not connection strings diff --git a/skills/.curated/whodb/agents/openai.yaml b/skills/.curated/whodb/agents/openai.yaml new file mode 100644 index 00000000..7dcdc831 --- /dev/null +++ b/skills/.curated/whodb/agents/openai.yaml @@ -0,0 +1,15 @@ +interface: + display_name: "WhoDB" + short_description: "Query and explore databases" + icon_small: "./assets/whodb-small.svg" + icon_large: "./assets/whodb.png" + default_prompt: "Use WhoDB to explore the database schema and help with the current task." + +dependencies: + tools: + - type: "mcp" + value: "whodb" + description: "WhoDB MCP server for database operations" + transport: "stdio" + command: "npx" + args: ["-y", "@clidey/whodb-cli", "mcp", "serve"] diff --git a/skills/.curated/whodb/assets/whodb-small.svg b/skills/.curated/whodb/assets/whodb-small.svg new file mode 100644 index 00000000..5ed25a94 --- /dev/null +++ b/skills/.curated/whodb/assets/whodb-small.svg @@ -0,0 +1,57 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/skills/.curated/whodb/assets/whodb.png b/skills/.curated/whodb/assets/whodb.png new file mode 100644 index 00000000..233d369b Binary files /dev/null and b/skills/.curated/whodb/assets/whodb.png differ