Lesson 489 of 2116
Codex Prompt Patterns That Actually Work
Five battle-tested prompt patterns for Codex that produce small, reviewable diffs instead of sprawling rewrites.
Lesson map
What this lesson covers
Learning path
The main moves in order
- 1Patterns beat one-shot prompts
- 2prompt pattern
- 3constraint prompt
- 4test-first prompt
Concept cluster
Terms to connect while reading
Section 1
Patterns beat one-shot prompts
If every Codex task starts as a freeform sentence, your team's results will be noisy. A small library of prompt patterns gives you reproducible quality. Here are five that survive contact with reality.
Pattern 1 — The constraint prompt
Pattern 2 — The test-first prompt
Pattern 3 — The explanation-only prompt
Pattern 4 — The audit prompt
Pattern 5 — The two-pass prompt
Compare the options
| Pattern | Best for | Failure mode |
|---|---|---|
| Constraint | Bounded fixes | Caps too tight = no fix |
| Test-first | New behavior | Tests that pin in bugs |
| Explanation-only | Onboarding | Hallucinations on rare code |
| Audit | Cross-cutting issues | Long lists need triage |
| Two-pass | High-stakes diffs | Two compute bills |
Applied exercise
- 1Save the five patterns as snippets in your editor
- 2For your next 10 Codex tasks, label each with the pattern you used
- 3Track which patterns produced PRs you merged without changes
- 4Promote your team's top three to a shared prompt library
Key terms in this lesson
The big idea: prompt patterns are templates, not magic. Standardize them and your team's Codex output gets predictably good.
End-of-lesson quiz
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