Recent Codex update broke subagents; rolling back to 0.142.0 works
chibop1 · reddit · 2026-08-19
A Reddit user reports that a recent OpenAI Codex change broke subagent functionality: PR #29067 now requires a namespace for subagent-related tool calls, leaving a number of models unable to use subagents.
Two issues (#31864, #31882) track the regression; the workaround is downgrading to codex-cli 0.142.0, which works fine.
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