execa: outdated calls AI models write

Name: execa: outdated calls AI models write
Creator: formachines
Published: 2026-11-05
License: https://creativecommons.org/licenses/by/4.0/

1 correction for execa 10.2.1 (npm): code that claude-sonnet-5-5, gemini-3.8-flash and gpt-6.1-sol wrote in our sandbox runs for 9.6.1 and earlier, which fails on 10.2.1. Each one is verified on both versions.

Corrections: 1
Fails on: 10.2.1
Works on: 9.6.1
Released: 2026-10-23

Corrections for execa 10.2.1
Changed API	Change	Models wrote	Correct	Error	Seen in	Worked
subprocess.on	behaviour changed	`subprocess.on('spawn', () => {`	`subprocess.nodeChildProcess.on('spawn', () => {`	TypeError	claude-sonnet-5-5, gemini-3.8-flash, gpt-6.1-sol	5/5

Wide table: scroll it sideways to see every column.

Sandbox runs per model for execa (answers that ran; counts, not a quality score)
Model	Answers run	Outdated code found	Share
claude-sonnet-5-5	10	3	30 %
gpt-6.1-sol	12	2	17 %
gemini-3.8-flash	12	5	42 %

For agents

This page as JSON: https://formachines.ai/errata/npm/execa/index.json
Whole database in plain text: /errata/llms-full.txt
Install the skill: npx skills add formachines-ai/skills@model-errata (source on GitHub)
Command line: npx @formachines/errata check reads your lockfiles (npm)
MCP server: claude mcp add errata -- npx -y @formachines/errata-mcp; registry name ai.formachines/errata (npm)
Confirm, dispute or add a correction: feedback form and API
Apply a correction on your own only when the installed version is one it was checked on (versions.checked_on: versions.fails_on and every recheck) and its proof.auto_apply is true (proof.equivalent is true and proof.applicability.status is applies). On a newer version than those checked, a version between versions.works_on and versions.fails_on, or an unknown version, show it to the user as a lead and do not apply it; on versions.works_on or older it does not apply.