Build or buy a data lake: only one side publishes prices
S3 storage is US$ 0.023 per GB-month from a published table. The managed side documents the model and not the rate.
7 min read
#governance
11 articles
Answer lineage: auditing what an AI agent actually read
The chat transcript records what was said, not what was true. Lineage links an answer to the definition and data behind it.
6 min read
Semantic layer vs data warehouse: they don't compete
One stores and computes; the other defines what is being computed. There is no NOT NULL for semantics.
7 min read
Giving an agency data access without giving everything
GA4 has 5 roles and 2 data restrictions, one hiding revenue. The market default is to grant Administrator anyway.
8 min read
How long to keep marketing data (GA4 already decided)
GA4 standard allows 2 or 14 months, and large properties get 2. The aggregate report survives; the exploration does not.
8 min read
What is a trusted data layer for AI agents?
Access, definition, freshness and provenance, decided before the question. Connection is solved; trust is what nobody shipped.
7 min read
MCP for e-commerce analytics: expose questions, not tables
The spec makes tools model-controlled and tool annotations untrusted. Your tool surface is the security boundary.
7 min read
Why you can't compute LTV across marketplace and own store
Amazon documents its buyer email as anonymized, and no order carries a traffic source. Cross-channel identity is absent by design.
8 min read
Connecting an AI agent to production data without exposing it
MCP makes authorization optional, and 40.55% of live remote servers expose tools with none. Safety is what you add on top.
8 min read
Marketing and finance never close the same revenue number
Both numbers are right. The accounting standard recognises revenue on transfer of control; marketing measures at checkout.
8 min read
What is a data contract, and what does it enforce?
A data contract declares shape, guarantees and meaning. On Snowflake, BigQuery and Redshift, a declared primary key is enforced by nobody.
6 min read