# CPython asyncio-subprocess.rst — googlesource/gitea/remotebranch mirrors

## Metadata

| Field | Value |
|---|---|
| Institute | Molodetz Institute — Research & Retrieval Division |
| Subject | async-pty-process-testing |
| Document type | Source Citation Card |
| Tier | 2 |
| Source title | asyncio-subprocess.rst (llvm.googlesource.com mirror) |
| Source URL | https://llvm.googlesource.com/third_party/cpython/+/refs/heads/main/Doc/library/asyncio-subprocess.rst |
| Source type | standard (mirrored stdlib source) |
| Date researched | 2026-10-09 |
| Researched by | tai (agent), model: Claude Sonnet 5, 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 "asyncio create_subprocess_exec start_new_session" search query: several near-duplicate mirrors of the same CPython `asyncio-subprocess.rst` documentation source surfaced across different git-hosting forks — several commit-pinned `chromium.googlesource.com` variants, `git.joshthomas.dev`'s mirror of the 3.9 branch, and `remotebranch.eu`'s mirror of the 3.15 branch, in addition to the llvm.googlesource.com one listed above. These are all redundant mirrors of the same stdlib source file already covered at Tier 1 in `python-docs-asyncio-subprocess.md`, not independent sources, logged together as one card.

## Changelog

| Date | Change |
|---|---|
| 2026-10-09 | Logged as consulted-but-not-analyzed (redundant mirrors of a Tier 1 source). |