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Add a new tool to Waku the right way — schema, safe execution, deterministic eval, honest output.
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Install New Tool
$ npx skills add juliepy/AI-Engineer-from-scrach --skill new-tool -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install juliepy/AI-Engineer-from-scrach new-tool --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/juliepy/AI-Engineer-from-scrach.git skills-src && mkdir -p .claude/skills && cp -r skills-src/12-hermes-agent-small/.claude/skills/new-tool .claude/skills/new-tool && 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 "new-tool" agent skill from https://github.com/juliepy/AI-Engineer-from-scrach/tree/main/12-hermes-agent-small/.claude/skills/new-tool into .claude/skills/new-tool/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "new-tool", 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/juliepy/AI-Engineer-from-scrach/tree/main/12-hermes-agent-small/.claude/skills/new-toolType 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 juliepy/AI-Engineer-from-scrach --skill new-tool -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install juliepy/AI-Engineer-from-scrach new-tool --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/juliepy/AI-Engineer-from-scrach.git skills-src && mkdir -p .agents/skills && cp -r skills-src/12-hermes-agent-small/.claude/skills/new-tool .agents/skills/new-tool && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "new-tool" agent skill from https://github.com/juliepy/AI-Engineer-from-scrach/tree/main/12-hermes-agent-small/.claude/skills/new-tool into .agents/skills/new-tool/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "new-tool", 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 juliepy/AI-Engineer-from-scrach --skill new-tool -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install juliepy/AI-Engineer-from-scrach new-tool --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/juliepy/AI-Engineer-from-scrach.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/12-hermes-agent-small/.claude/skills/new-tool .cursor/skills/new-tool && 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 "new-tool" agent skill from https://github.com/juliepy/AI-Engineer-from-scrach/tree/main/12-hermes-agent-small/.claude/skills/new-tool into .cursor/skills/new-tool/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "new-tool", 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/juliepy/AI-Engineer-from-scrach.git --path 12-hermes-agent-small/.claude/skills/new-tool--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 juliepy/AI-Engineer-from-scrach --skill new-tool -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install juliepy/AI-Engineer-from-scrach new-tool --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/juliepy/AI-Engineer-from-scrach.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/12-hermes-agent-small/.claude/skills/new-tool .gemini/skills/new-tool && 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 "new-tool" agent skill from https://github.com/juliepy/AI-Engineer-from-scrach/tree/main/12-hermes-agent-small/.claude/skills/new-tool into .gemini/skills/new-tool/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "new-tool", 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 juliepy/AI-Engineer-from-scrach new-toolInstalls 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 juliepy/AI-Engineer-from-scrach --skill new-tool -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/juliepy/AI-Engineer-from-scrach.git skills-src && mkdir -p .github/skills && cp -r skills-src/12-hermes-agent-small/.claude/skills/new-tool .github/skills/new-tool && 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 "new-tool" agent skill from https://github.com/juliepy/AI-Engineer-from-scrach/tree/main/12-hermes-agent-small/.claude/skills/new-tool into .github/skills/new-tool/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "new-tool", 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 juliepy/AI-Engineer-from-scrach --skill new-tool -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install juliepy/AI-Engineer-from-scrach new-tool --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/juliepy/AI-Engineer-from-scrach.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/12-hermes-agent-small/.claude/skills/new-tool .opencode/skills/new-tool && 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 "new-tool" agent skill from https://github.com/juliepy/AI-Engineer-from-scrach/tree/main/12-hermes-agent-small/.claude/skills/new-tool into .opencode/skills/new-tool/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "new-tool", 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
new-tool- GitHub stars
- 433
- Token cost
- ~343 tokens
- SKILL.md length
- 148 words
- Files
- 1
- Skills in repo
- 15
- Repo updated
- First seen
- Licence
- None found
At a glance
Add a new tool to Waku the right way — schema, safe execution, deterministic eval, honest output.
- Works in 6 steps: One file per tool in waku/tools/,… → The tool function must be → Register it in… → …
- Modifying agent tools
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- The user asks for a new capability
What it does
New Tool is an agent skill from juliepy/AI-Engineer-from-scrach. Add a new tool to Waku the right way — schema, safe execution, deterministic eval, honest output. Use when adding or modifying agent tools or when the user asks for a new capability.
Its SKILL.md is about 340 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
When your agent uses it
- Modifying agent tools
- The user asks for a new capability
Example prompts
- “/new-tool”
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- One file per tool in waku/tools/, exposing make_tool(...) -> Tool.
- The tool function must be
- Register it in waku/tools/init.py:build_registry.
- Add deterministic eval coverage in evals/deterministic/
- If the tool needs usage guidance, add a rule to DEFAULT_SOUL
- Check scope first: the repo ships flagship-task tools only. New capabilities
What it can do on your machine
Read from SKILL.md and the folder at commit d9e02cb. 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
New Tool loads about 343 tokens when it runs. Until then it costs about 48 tokens; SKILL.md has 148 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
Without a licence we can't republish the file, so here is its outline and opening line. It has 148 words (~343 tokens).
“Copy the shape of waku/tools/calendar.py (the reference implementation).”
- name
- new-tool
Files
Just SKILL.md in 12-hermes-agent-small/.claude/skills/new-tool of juliepy/AI-Engineer-from-scrach.
Open the folder on GitHubat commit d9e02cb
Compare with similar skills
New Tool 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 |
|---|---|---|---|---|---|---|
| New Tool this skilljuliepy/AI-Engineer-from-scrach | 433 | — | ~343 | Automated safety check: Pass | None | |
| Safe PushJetBrains/intellij-community | 21k | — | ~1.1k | Automated safety check: Pass | Custom licence | |
| Safe RefactorJuliusBrussee/caveman | 110k | 1 repos | ~177 | Automated safety check: Pass | Apache-2.0 | |
| Right To Erasurethedaviddias/Front-End-Checklist | 74k | — | ~512 | Automated safety check: Pass | MIT | |
| Safe SQL Executionsupabase/supabase | 111k | — | ~4.2k | Automated safety check: Pass | Apache-2.0 | |
| Performing Ot Vulnerability Scanning Safelymukul975/Anthropic-Cybersecurity-Skills | 34k | — | ~2.9k | Automated safety check: Pass | Apache-2.0 |
Similar skills
- Official
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JuliusBrussee/caveman
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Right To Erasure
thedaviddias/Front-End-Checklist
A skill your agent uses when auditing account settings pages, privacy dashboards, or API routes to verify that a complete data deletion path exists for users.
- Official
Safe SQL Execution
supabase/supabase
A skill your agent uses whenever code will build, return, fetch, or execute SQL that runs against a user's real Postgres database — even when the request reads like an ordinary feature or bug fix…
Performing Ot Vulnerability Scanning Safely
mukul975/Anthropic-Cybersecurity-Skills
Perform vulnerability scanning in OT/ICS environments safely using passive monitoring, native protocol queries, and carefully controlled active scanning with Tenable OT Security to identify…
Gnosis Safe
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Execute multi-signature transactions through Gnosis Safe (Safe) using Nethereum (.NET/C).
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Build, audit, and improve lightweight harnesses for AI coding agents: AGENTS.md/CLAUDE.md, feature state, verification workflows, scope boundaries, lifecycle handoff, memory persistence, context…
PR Worktree
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Create and tear down the throwaway git worktrees used to test community PRs for waku-agent, without leaking API keys or leaving branches behind.
Review PR
juliepy/AI-Engineer-from-scrach
Review an incoming community PR for waku-agent and present it Sean's way — bilingual (English + 中文), three fixed sections: what they did & why it matters, verdict (merge / change / close), and how…
Implement
juliepy/AI-Engineer-from-scrach
Read a plan file, execute every task in dependency order with per-task validation, then write an implementation report to reports/<feature-slug-implementation-report.md.
Plan
juliepy/AI-Engineer-from-scrach
Analyze a ticket or feature description, read the codebase, identify risks, and write a context-rich implementation plan to plans/<feature-slug-plan.md.
Validate
juliepy/AI-Engineer-from-scrach
Run the full quality gate (ruff + mypy + pytest + tsc + vitest) and report PASS/FAIL for each command.
Questions about New Tool
What does New Tool do?
Add a new tool to Waku the right way — schema, safe execution, deterministic eval, honest output. New Tool is an agent skill from juliepy/AI-Engineer-from-scrach. Add a new tool to Waku the right way — schema, safe execution, deterministic eval, honest output.
When should I use New Tool?
New Tool fits situations like: modifying agent tools; the user asks for a new capability.
How do I install New Tool in Claude Code?
Run `npx skills add juliepy/AI-Engineer-from-scrach --skill new-tool -a claude-code`. Or copy the skill folder (12-hermes-agent-small/.claude/skills/new-tool in juliepy/AI-Engineer-from-scrach) into .claude/skills/new-tool in your project. Claude Code loads it when a task matches its description.
How do I install New Tool in Codex?
Run `npx skills add juliepy/AI-Engineer-from-scrach --skill new-tool -a codex`. Or copy the skill folder (12-hermes-agent-small/.claude/skills/new-tool in juliepy/AI-Engineer-from-scrach) into .agents/skills/new-tool in your project. Codex loads it when a task matches its description.
Can I use New Tool 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 juliepy/AI-Engineer-from-scrach --skill new-tool -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/new-tool, .gemini/skills/new-tool, .github/skills/new-tool and .opencode/skills/new-tool in your project.
What does New Tool need to run?
SKILL.md names no scripts, command-line tools or credentials: New Tool is instructions for the agent only.
Does New Tool 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 New Tool 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 New Tool use?
No licence was found for New Tool or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does New Tool use?
About 343 tokens (SKILL.md is roughly 1.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to New Tool?
Skills that share tags, products or a category with New Tool: Safe Push (JetBrains/intellij-community, 21k stars), Safe Refactor (JuliusBrussee/caveman, 110k stars), Right To Erasure (thedaviddias/Front-End-Checklist, 74k stars) and Safe SQL Execution (supabase/supabase, 111k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains New Tool?
juliepy (a GitHub user) maintains it in juliepy/AI-Engineer-from-scrach, which has 433 GitHub stars. The repository holds 15 skills in this directory. The repository was last updated on September 6, 2026.
Source: juliepy/AI-Engineer-from-scrach on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.