/review fails to function

Resolved 💬 5 comments Opened Nov 20, 2025 by corrylc Closed Jan 9, 2026

💡 Likely answer: A maintainer (jif-oai, contributor) responded on this thread — see the highlighted reply below.

What version of Codex is running?

codex-cli 0.60.1

What subscription do you have?

Business

Which model were you using?

gpt-5.1-codex-max high

What platform is your computer?

Darwin 25.1.0 arm64 arm

What issue are you seeing?

/review command fails with unexpected status 400 Bad Request: {"detail":"Instructions are not valid"}

What steps can reproduce the bug?

Run /review in "PR mode"

What is the expected behavior?

Complete a code review

Additional information

_No response_

View original on GitHub ↗

5 Comments

corrylc · 9 months ago

Same issue with gpt-5.1-codex medium

corrylc · 9 months ago

Still present in v0.60.0

╭────────────────────────────────────────────────────────╮
│ >_ OpenAI Codex (v0.61.0)                              │
│                                                        │
│ model:     gpt-5.1-codex-max medium   /model to change │
│ directory: ~/workspace/****                            │
╰────────────────────────────────────────────────────────╯

  To get started, describe a task or try one of these commands:

  /init - create an AGENTS.md file with instructions for Codex
  /status - show current session configuration
  /approvals - choose what Codex can do without approval
  /model - choose what model and reasoning effort to use
  /review - review any changes and find issues

⚠ Heads up, you've used over 90% of your weekly limit. Run /status for a breakdown.


› hi


• Hi! How can I help today?

>> Code review started: changes against 'main' <<

■ unexpected status 400 Bad Request: {"detail":"Instructions are not valid"}

<< Code review finished >>

corrylc · 9 months ago

Still present in v0.62

╭──────────────────────────────────────────────────────╮
│ >_ OpenAI Codex (v0.62.0)                            │
│                                                      │
│ model:     gpt-5.1-codex-max high   /model to change │
│ directory: ~/workspace/****                          │
╰──────────────────────────────────────────────────────╯

  To get started, describe a task or try one of these commands:

  /init - create an AGENTS.md file with instructions for Codex
  /status - show current session configuration
  /approvals - choose what Codex can do without approval
  /model - choose what model and reasoning effort to use
  /review - review any changes and find issues


› hi


• Hey! What can I help you with today?

>> Code review started: commit 070d8f2 <<

■ unexpected status 400 Bad Request: {"detail":"Instructions are not valid"}

<< Code review finished >>

corrylc · 9 months ago

This issue is caused by the parallel feature flag being enabled. Disable it to restore review functionality.

No idea why it affects only the review workflow, I assume the backend filtering system was only updated to support the feature flag in some paths?

jif-oai contributor · 7 months ago

This should have been resolved, could you confirm?