# concurrent.futures

## Metadata

| Field | Value |
|---|---|
| Institute | Molodetz Institute — Research & Retrieval Division |
| Subject | background-work-limits |
| Document type | Source Citation Card |
| Tier | 2 |
| Source title | concurrent.futures |
| Source URL | https://docs.python.org/3/library/concurrent.futures.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 the deadlock warning for tasks waiting on each other's futures. Supports the reject-instead-of-block choice (a blocked spawn could stall a turn holding budget); not opened first-hand.

## Changelog

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