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Skill

senior-prompt-engineer

"Prompt engineering workflow for building reliable assistants and agents: task decomposition, instruction hierarchy, tool-use patterns, safety constraints, and evaluation design. Use when writing or refactoring system prompts, creating structured prompts, building prompt test suites, or debugging regressions in LLM behavior."

Categoryai
Last updated2026-01-19
View on GitHub
Install

One-line setup

Copy and run this in your terminal to install the skill. Re-run to reinstall and update an existing install.

npx codex-skills-registry@latest --skill=ai/senior-prompt-engineer --yes

Senior Prompt Engineer

Treat prompts like products: versioned, tested, and measurable.

Quick Start

  1. Define the job: inputs, outputs, and the “definition of done”.
  2. Write the smallest prompt that:
    • states constraints clearly
    • defines output format
    • includes edge-case handling
  3. Add examples only when needed (few-shot is expensive).
  4. Create an eval set: representative cases + adversarial cases.
  5. Iterate with diffs: change one thing, measure impact.

Optional tool: scaffold a prompt + eval harness

python ~/.codex/skills/senior-prompt-engineer/scripts/scaffold_prompt_eval.py . --out evals/prompt_eval

References

  • Prompt review checklist: references/prompt-review.md