ktx/packages/context/skills/live_database_ingest/SKILL.md

name	description	callers
live_database_ingest	Capture semantic-layer and knowledge updates from a live database schema snapshot.	memory_agent

Live Database Ingest

Use this skill when the ingest work unit contains raw files under raw-sources/<connectionId>/live-database/<syncId>/.

Workflow

1. Read the table JSON file listed in the work unit.
2. Read connection.json to understand the snapshot metadata.
3. Read foreign-keys.json when the table has a foreign key or when joins are needed for the semantic-layer source.
4. Create or update one semantic-layer source for the table with sl_write_source.
5. Use the physical table name from the raw JSON as the source table field.
6. Preserve database comments as descriptions.db on tables and columns.
7. Add joins only when the foreign key index names both sides.
8. Write wiki pages only for durable business meaning that is present in table or column comments.
9. Run sl_validate for the table source before the work unit completes.

Source shape

For a raw table with this shape:

{
  "name": "orders",
  "db": "public",
  "columns": [
    { "name": "id", "type": "integer", "nullable": false, "primaryKey": true }
  ]
}

Write a semantic-layer source with this shape:

name: orders
table: public.orders
grain: id
columns:
  - name: id
    type: number

Use string, number, time, or boolean for column types. When a database type is ambiguous, use string.

Boundaries

The raw snapshot is structural evidence. Do not invent measures, segments, business definitions, or joins that are not present in the snapshot files.