CDX-CFG-029: Invalid Agent Concurrency Limit - Codex CLI

Summary

• Rule ID: CDX-CFG-029
• Severity: HIGH
• Category: Codex CLI
• Normative Level: MUST
• Auto-Fix: No
• Verified On: 2026-07-26

Applicability

• Tool: codex
• Version Range: >=0.145.0
• Spec Revision: unspecified

Evidence Sources

• https://github.com/openai/codex/releases/tag/rust-v0.145.0
• https://github.com/openai/codex/pull/33550
• https://github.com/openai/codex/blob/rust-v0.145.0/codex-rs/config/src/config_toml.rs

Test Coverage Metadata

• Unit tests: true
• Fixture tests: false
• E2E tests: false

Examples

The following examples demonstrate what triggers this rule and how to fix it.

Invalid

[agents]
max_concurrent_threads_per_session = 0

Valid

[agents]
max_concurrent_threads_per_session = 4

[features]
multi_agent_v2 = true