# Trio's core functionality

## Metadata

| Field | Value |
|---|---|
| Institute | Molodetz Institute — Research & Retrieval Division |
| Subject | background-work-limits |
| Document type | Source Citation Card |
| Tier | 2 |
| Source title | Trio's core functionality |
| Source URL | https://trio.readthedocs.io/en/stable/reference-core.html |
| Source type | vendor docs |
| Date researched | 2026-10-18 |
| Researched by | tai (agent), model: Muse Spark, on behalf of retoor |
| Research method | Search aggregator result listing (not independently opened or quoted) |
| Confidence | Not independently verified |
| Status | Active |

## Why it's here

Surfaced by the supervision gather worker; reported nursery cancel-all on child error with grouped re-raise. The cancel-and-group half of structured concurrency, not applicable to tai's kill-less threads; stayed a card.

## Changelog

| Date | Change |
|---|---|
| 2026-10-18 | Logged as consulted-but-not-analyzed. |