**Sources:** [**Anthropic Economic Index v3 - collaboration patterns**](https://www.anthropic.com/research/anthropic-economic-index) (CC BY 4.0; per-task `directive` / `task_iteration` / `feedback_loop` / `validation` / `learning` percentages and per-task `usage_count_global` weights), [**O\*NET-SOC 28.3**](https://www.onetcenter.org/database.html) (CC BY 4.0; 8-digit O\*NET-SOC codes used to roll AEI tasks up to BLS SOC major groups via `LEFT(onet_soc_code, 2)`).

**Tools:** **Bruin CLI** (pipeline), **BigQuery** (warehouse), **Bruin DAC** (visualization).

**Limitations:** AEI also publishes `none` and `not_classified` collaboration buckets - both are dropped before renormalizing so the five shown patterns sum to 100 % within a group, which inflates each pattern's share by however much fell into those two buckets. Within-group percentages are weighted by AEI conversation count, so heavy tasks dominate the group composition; an unweighted view would be flatter. Groups with fewer than 1,000 weighted conversations are dropped. Construction & Extraction and Building & Grounds Cleaning have all-NULL collaboration fields in `release_2026_01_15` and are also dropped, leaving 20 of the 22 BLS SOC major groups.

[OC] How Claude is used across occupations: directive, iteration, feedback, validation, learning (AEI v3)