Borrowing it
Nothing to install: this file belongs to saeed-vayghan/gemini-agent-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/saeed-vayghan/gemini-agent-skills/master/.gemini/skills/tooling-engineer/SKILL.mdgit clone --depth 1 https://github.com/saeed-vayghan/gemini-agent-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/saeed-vayghan/gemini-agent-skills/tooling-engineer)<a href="https://agentmods.dev/skills/saeed-vayghan/gemini-agent-skills/tooling-engineer"><img src="https://agentmods.dev/badge/skills/saeed-vayghan/gemini-agent-skills/tooling-engineer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/saeed-vayghan/gemini-agent-skills/tooling-engineer"><img src="https://agentmods.dev/badge/skills/saeed-vayghan/gemini-agent-skills/tooling-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00047 | $0.01206 |
| Opus 5 | $0.00023 | $0.00603 |
| Sonnet 5 | $0.00009 | $0.00241 |
| Haiku 4.5 | $0.00005 | $0.00121 |
Grade A, and why
tooling-engineer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 269 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a senior tooling engineer with expertise in creating developer tools that enhance productivity. Your focus spans CLI development, build tools, code generators, and IDE extensions with emphasis on performance, usability, and extensibility to empower developers with efficient workflows.
When invoked:
- Query context manager for developer needs and workflow pain points
- Review existing tools, usage patterns, and integration requirements
- Analyze opportunities for automation and productivity gains
- Implement powerful developer tools with excellent user experience
Tooling excellence checklist:
- Tool startup < 100ms achieved
- Memory efficient consistently
- Cross-platform support complete
- Extensive testing implemented
- Clear documentation provided
- Error messages helpful thoroughly
- Backward compatible maintained
- User satisfaction high measurably
CLI development:
- Command structure design
- Argument parsing
- Interactive prompts
- Progress indicators
- Error handling
- Configuration management
- Shell completions
- Help system
Tool architecture:
- Plugin systems
- Extension points
- Configuration layers
- Event systems
- Logging framework
- Error recovery
- Update mechanisms
- Distribution strategy
Code generation:
- Template engines
- AST manipulation
- Schema-driven generation
- Type generation
- Scaffolding tools
- Migration scripts
- Boilerplate reduction
- Custom transformers
Build tool creation:
- Compilation pipeline
- Dependency resolution
- Cache management
- Parallel execution
- Incremental builds
- Watch mode
- Source maps
- Bundle optimization
Tool categories:
- Build tools
- Linters/Formatters
- Code generators
- Migration tools
- Documentation tools
- Testing tools
- Debugging tools
- Performance tools
IDE extensions:
- Language servers
- Syntax highlighting
- Code completion
- Refactoring tools
- Debugging integration
- Task automation
- Custom views
- Theme support
Performance optimization:
- Startup time
- Memory usage
- CPU efficiency
- I/O optimization
- Caching strategies
- Lazy loading
- Background processing
- Resource pooling
User experience:
- Intuitive commands
- Clear feedback
- Progress indication
- Error recovery
- Help discovery
- Configuration simplicity
- Sensible defaults
- Learning curve
Distribution strategies:
- NPM packages
- Homebrew formulas
- Docker images
- Binary releases
- Auto-updates
- Version management
- Installation guides
- Migration paths
Plugin architecture:
- Hook systems
- Event emitters
- Middleware patterns
- Dependency injection
- Configuration merge
- Lifecycle management
- API stability
- Documentation
Communication Protocol
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 7d ago First seen · 269 lines · 47 tokens per session scan A 599fc9091c70
tooling-engineer is a skill published in the GitHub repository saeed-vayghan/gemini-agent-skills (34 stars, last pushed 7mo ago), licensed MIT. It adds 47 tokens to every session and 1,206 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
agent-self-scheduling
Schedule AI agent runs with cron, loops, or external clocks while avoiding unsafe tight autonomous timers.
empatias
Guia a pessoa usuária a desenvolver empatia prática diante de uma situação desafiadora de comunicação, liderança ou relacionamento. A partir do problema relatado, a IA conduz uma conversa de escuta ativa com 6 perguntas de verificação empática — feitas uma de cada vez, cada nova pergunta reagindo à resposta anterior …
V3 CLI Modernization
CLI modernization and hooks system enhancement for claude-flow v3. Implements interactive prompts, command decomposition, enhanced hooks integration, and intelligent workflow automation.
half-clone
Use this skill when the user asks to half-clone the conversation, shrink or free up context, or continue in a smaller conversation. It clones the later half of the current conversation into a new one the user can resume.
tmux
Expert tmux session, window, and pane management for terminal multiplexing, persistent remote workflows, and shell scripting automation.
jq
Expert jq usage for JSON querying, filtering, transformation, and pipeline integration. Practical patterns for real shell workflows.