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CDX-PL-009: Default Prompt Too Long - Codex CLI

Summary​

  • Rule ID: CDX-PL-009
  • Severity: MEDIUM
  • Category: Codex CLI
  • Normative Level: MUST
  • Auto-Fix: No
  • Verified On: 2026-04-01

Applicability​

  • Tool: codex
  • Version Range: >=0.117.0
  • Spec Revision: unspecified

Evidence Sources​

Test Coverage Metadata​

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

Examples​

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

Invalid​

{"name": "my-plugin", "interface": {"defaultPrompt": ["<500+ character prompt string>"]}}

Valid​

{"name": "my-plugin", "interface": {"defaultPrompt": ["Fix the login bug"]}}