Prompt Improver
severity1/claude-code-prompt-improver
This skill enriches vague prompts with targeted research and clarification before execution.
Write, evaluate, migrate, or troubleshoot prompts for GPT and Claude models.
Install Prompt Engineer
$ npx skills add bastani-inc/atomic --skill prompt-engineer -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install bastani-inc/atomic prompt-engineer --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/bastani-inc/atomic.git skills-src && mkdir -p .claude/skills && cp -r skills-src/packages/workflows/skills/prompt-engineer .claude/skills/prompt-engineer && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "prompt-engineer" agent skill from https://github.com/bastani-inc/atomic/tree/main/packages/workflows/skills/prompt-engineer into .claude/skills/prompt-engineer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-engineer", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/bastani-inc/atomic/tree/main/packages/workflows/skills/prompt-engineerType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add bastani-inc/atomic --skill prompt-engineer -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install bastani-inc/atomic prompt-engineer --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/bastani-inc/atomic.git skills-src && mkdir -p .agents/skills && cp -r skills-src/packages/workflows/skills/prompt-engineer .agents/skills/prompt-engineer && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "prompt-engineer" agent skill from https://github.com/bastani-inc/atomic/tree/main/packages/workflows/skills/prompt-engineer into .agents/skills/prompt-engineer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-engineer", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add bastani-inc/atomic --skill prompt-engineer -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install bastani-inc/atomic prompt-engineer --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/bastani-inc/atomic.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/packages/workflows/skills/prompt-engineer .cursor/skills/prompt-engineer && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "prompt-engineer" agent skill from https://github.com/bastani-inc/atomic/tree/main/packages/workflows/skills/prompt-engineer into .cursor/skills/prompt-engineer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-engineer", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/bastani-inc/atomic.git --path packages/workflows/skills/prompt-engineer--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add bastani-inc/atomic --skill prompt-engineer -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install bastani-inc/atomic prompt-engineer --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/bastani-inc/atomic.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/packages/workflows/skills/prompt-engineer .gemini/skills/prompt-engineer && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "prompt-engineer" agent skill from https://github.com/bastani-inc/atomic/tree/main/packages/workflows/skills/prompt-engineer into .gemini/skills/prompt-engineer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-engineer", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install bastani-inc/atomic prompt-engineerInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add bastani-inc/atomic --skill prompt-engineer -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/bastani-inc/atomic.git skills-src && mkdir -p .github/skills && cp -r skills-src/packages/workflows/skills/prompt-engineer .github/skills/prompt-engineer && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "prompt-engineer" agent skill from https://github.com/bastani-inc/atomic/tree/main/packages/workflows/skills/prompt-engineer into .github/skills/prompt-engineer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-engineer", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add bastani-inc/atomic --skill prompt-engineer -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install bastani-inc/atomic prompt-engineer --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/bastani-inc/atomic.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/packages/workflows/skills/prompt-engineer .opencode/skills/prompt-engineer && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "prompt-engineer" agent skill from https://github.com/bastani-inc/atomic/tree/main/packages/workflows/skills/prompt-engineer into .opencode/skills/prompt-engineer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-engineer", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
prompt-engineer- GitHub stars
- 850
- Token cost
- ~1.4k tokens
- SKILL.md length
- 658 words
- Files
- 16 (incl. references)
- Skills in repo
- 15
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Write, evaluate, migrate, or troubleshoot prompts for GPT and Claude models.
- Works in 6 steps: Establish the outcome, audience, model,… → Read the needed shared reference and the… → Remove obsolete or redundant guidance… → …
- Tasks that involve Prompt engineering
- SKILL.md covers Workflow, Shared references, Model guides and Common rules
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Prompt Engineer is an agent skill from bastani-inc/atomic. Write, evaluate, migrate, or troubleshoot prompts for GPT and Claude models.
Its SKILL.md is about 1.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 16 other files, including reference files (for example `references/advanced_patterns.md`, `references/claude_fable_5.md` and `references/claude_fable_5_1.md`).
It sits in AI & LLM Engineering, covering Prompt engineering. The repository describes itself as: The verifiable coding agent runtime. Define your coding agent's process in natural language with stages, checks, and approval gates instead of hoping it follows your…
When your agent uses it
- Tasks that involve Prompt engineering
Example prompts
- “/prompt-engineer”
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Establish the outcome, audience, model, authorization, output, and representative failures. Ask only for missing information that…
- Read the needed shared reference and the target model's page below. Resolve paths from this skill directory.
- Remove obsolete or redundant guidance before adding text. Preserve binding requirements.
- For complex prompts, use Role · Goal · Success criteria · Constraints · Tools · Output · Stop rules; omit sections that do not change…
- Change one prompt or configuration variable at a time and compare representative cases. Measure task success, output validity, tool…
- Deliver the revised prompt, a brief change summary, and validation evidence or a plan. Label checks that were not run.
What it can do on your machine
Read from SKILL.md and the folder at commit ad79904. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Prompt Engineer loads about 1.4k tokens when it runs, and up to ~32k if it reads all its reference files. Until then it costs about 23 tokens; SKILL.md has 658 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 658 words (~1,370 tokens).
“Create or revise prompts for the user's target model. Keep the common prompt portable and load only the relevant model guide. Each page connects an observed behavior to a prompt adjustment, prompt wording, and caveats. Use the matching patterns rather…”
- name
- prompt-engineer
Files
SKILL.md and 15 other files (references) in packages/workflows/skills/prompt-engineer of bastani-inc/atomic.
- SKILL.md
- references/advanced_patterns.md
- references/claude_fable_5.md
- references/claude_fable_5_1.md
- references/claude_haiku_5_5.md
- references/claude_opus_4_8.md
- references/claude_opus_5.md
- references/claude_opus_5_5.md
- references/claude_sonnet_5.md
- references/claude_sonnet_5_5.md
- references/core_prompting.md
- references/gpt_5_5.md
- references/gpt_5_6.md
- references/gpt_6.md
- references/gpt_6_1_sol.md
- references/quality_improvement.md
Open the folder on GitHubat commit ad79904
Compare with similar skills
Prompt Engineer next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Prompt Engineer this skillbastani-inc/atomic | 850 | — | ~1.4k | Automated safety check: Pass | Custom licence | |
| Prompt Improverseverity1/claude-code-prompt-improver | 1.9k | 1 repos | ~1.7k | Automated safety check: Pass | MIT | |
| Prompt Engineering Patternsynulihao/AgentSkillOS | 617 | 14 repos | ~1.7k | Automated safety check: Pass | None | |
| Patch CreationPiebald-AI/tweakcc | 2.5k | — | ~1.6k | Automated safety check: Pass | MIT | |
| Senior Prompt Engineermaslennikov-ig/claude-code-orchestrator-kit | 260 | 3 repos | ~1.4k | Automated safety check: Pass | Custom licence | |
| Codex Fable5baskduf/FableCodex | 437 | — | ~1.6k | Automated safety check: Pass | AGPL-3.0 |
Similar skills
Prompt Engineering Patterns
ynulihao/AgentSkillOS
Master advanced prompt engineering techniques to maximize LLM performance, reliability, and controllability in production.
Patch Creation
Piebald-AI/tweakcc
Create and register new patches for tweakcc. An agent skill from Piebald-AI/tweakcc.
Senior Prompt Engineer
maslennikov-ig/claude-code-orchestrator-kit
Provides reference guides and Python scripts for prompt optimization, RAG evaluation, and agent orchestration when building or tuning LLM systems.
Codex Fable5
baskduf/FableCodex
Apply a Claude Fable 5 inspired operating style inside Codex.
Prompt Engineering Patterns
wshobson/agents
Reference for designing and tuning production LLM prompts: few-shot examples, chain-of-thought, structured outputs, templates and system prompts.
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Categories
Questions about Prompt Engineer
What does Prompt Engineer do?
Write, evaluate, migrate, or troubleshoot prompts for GPT and Claude models. Prompt Engineer is an agent skill from bastani-inc/atomic. Write, evaluate, migrate, or troubleshoot prompts for GPT and Claude models.
When should I use Prompt Engineer?
Prompt Engineer fits situations like: tasks that involve Prompt engineering.
How do I install Prompt Engineer in Claude Code?
Run `npx skills add bastani-inc/atomic --skill prompt-engineer -a claude-code`. Or copy the skill folder (packages/workflows/skills/prompt-engineer in bastani-inc/atomic) into .claude/skills/prompt-engineer in your project. Claude Code loads it when a task matches its description.
How do I install Prompt Engineer in Codex?
Run `npx skills add bastani-inc/atomic --skill prompt-engineer -a codex`. Or copy the skill folder (packages/workflows/skills/prompt-engineer in bastani-inc/atomic) into .agents/skills/prompt-engineer in your project. Codex loads it when a task matches its description.
Can I use Prompt Engineer in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add bastani-inc/atomic --skill prompt-engineer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/prompt-engineer, .gemini/skills/prompt-engineer, .github/skills/prompt-engineer and .opencode/skills/prompt-engineer in your project.
What does Prompt Engineer need to run?
SKILL.md names no scripts, command-line tools or credentials: Prompt Engineer is instructions for the agent only.
Does Prompt Engineer access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Prompt Engineer safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Prompt Engineer use?
Prompt Engineer has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Prompt Engineer use?
About 1.4k tokens (SKILL.md is roughly 5.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 31k tokens, read only when the agent opens those files.
What are the alternatives to Prompt Engineer?
Skills that share tags, products or a category with Prompt Engineer: Prompt Improver (severity1/claude-code-prompt-improver, 1.9k stars), Prompt Engineering Patterns (ynulihao/AgentSkillOS, 617 stars), Patch Creation (Piebald-AI/tweakcc, 2.5k stars) and Senior Prompt Engineer (maslennikov-ig/claude-code-orchestrator-kit, 260 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Prompt Engineer?
bastani-inc (a GitHub organization) maintains it in bastani-inc/atomic, which has 850 GitHub stars. The repository holds 15 skills in this directory. The repository was last updated on October 9, 2026.
Source: bastani-inc/atomic on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.