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lmiranda 89f0354ccc feat: add data-platform plugin (v4.0.0)

Add new data-platform plugin for data engineering workflows with:

MCP Server (32 tools):
- pandas operations (14 tools): read_csv, read_parquet, read_json,
  to_csv, to_parquet, describe, head, tail, filter, select, groupby,
  join, list_data, drop_data
- PostgreSQL/PostGIS (10 tools): pg_connect, pg_query, pg_execute,
  pg_tables, pg_columns, pg_schemas, st_tables, st_geometry_type,
  st_srid, st_extent
- dbt integration (8 tools): dbt_parse, dbt_run, dbt_test, dbt_build,
  dbt_compile, dbt_ls, dbt_docs_generate, dbt_lineage

Plugin Features:
- Arrow IPC data_ref system for DataFrame persistence across tool calls
- Pre-execution validation for dbt with `dbt parse`
- SessionStart hook for PostgreSQL connectivity check (non-blocking)
- Hybrid configuration (system ~/.config/claude/postgres.env + project .env)
- Memory management with 100k row limit and chunking support

Commands: /initial-setup, /ingest, /profile, /schema, /explain, /lineage, /run
Agents: data-ingestion, data-analysis

Test suite: 71 tests covering config, data store, pandas, postgres, dbt tools

Addresses data workflow issues from personal-portfolio project:
- Lost data after multiple interactions (solved by Arrow IPC data_ref)
- dbt 1.9+ syntax deprecation (solved by pre-execution validation)
- Ungraceful PostgreSQL error handling (solved by SessionStart hook)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-25 14:24:03 -05:00

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/schema - Schema Exploration

Display schema information for database tables or DataFrames.

Usage

/schema [table_name | data_ref]

Workflow

Determine target:
- If argument is a loaded data_ref, show DataFrame schema
- If argument is a table name, query database schema
- If no argument, list all available tables and DataFrames
For DataFrames:
- Use describe to get column info
- Show dtypes, null counts, sample values
For database tables:
- Use pg_columns for column details
- Use st_tables to check for PostGIS columns
- Show constraints and indexes if available
Report:
- Column name, type, nullable, default
- For PostGIS: geometry type, SRID
- For DataFrames: pandas dtype, null percentage

Examples

/schema                    # List all tables and DataFrames
/schema customers          # Show table schema
/schema sales_data         # Show DataFrame schema

Available Tools

Use these MCP tools:

pg_tables - List database tables
pg_columns - Get column info
pg_schemas - List schemas
st_tables - List PostGIS tables
describe - Get DataFrame info
list_data - List DataFrames

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/schema - Schema Exploration

Usage

Workflow

Examples

Available Tools

1.2 KiB

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