OUTPUT FORMATS:

MARKDOWN (default, -f markdown):
  Aligned table with columns: Field, Types, Coverage, Distinct, Values.

JSON (-f json):
  Top-level array of field objects. Each object has: field, types,
  coverage { count, percentage }, distinct, values [{ value, count }].

YAML (-f yaml):
  Same shape as JSON, rendered as YAML.

EXAMPLES:

  # Full workspace schema
  iwe schema

  # Schema for posts only
  iwe schema --filter 'type: post'

  # Drill into a specific field
  iwe schema --field status

  # JSON output for scripting
  iwe schema -f json

  # Schema for documents with a specific pillar
  iwe schema --filter 'pillar: ai-memory'

  # Nested field inspection
  iwe schema --field engagement -f json
