MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
Captures the current session's successful workflow and saves it as a reusable skill with SKILL.md and helper scripts
$ npx skills add AgentToolkit/altk-evolve --skill save -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install AgentToolkit/altk-evolve save --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/AgentToolkit/altk-evolve.git skills-src && mkdir -p .claude/skills && cp -r skills-src/platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save .claude/skills/save && 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 "save" agent skill from https://github.com/AgentToolkit/altk-evolve/tree/main/platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save into .claude/skills/save/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "save", 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/AgentToolkit/altk-evolve/tree/main/platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/saveType 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 AgentToolkit/altk-evolve --skill save -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install AgentToolkit/altk-evolve save --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/AgentToolkit/altk-evolve.git skills-src && mkdir -p .agents/skills && cp -r skills-src/platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save .agents/skills/save && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "save" agent skill from https://github.com/AgentToolkit/altk-evolve/tree/main/platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save into .agents/skills/save/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "save", 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 AgentToolkit/altk-evolve --skill save -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install AgentToolkit/altk-evolve save --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/AgentToolkit/altk-evolve.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save .cursor/skills/save && 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 "save" agent skill from https://github.com/AgentToolkit/altk-evolve/tree/main/platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save into .cursor/skills/save/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "save", 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/AgentToolkit/altk-evolve.git --path platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save--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 AgentToolkit/altk-evolve --skill save -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install AgentToolkit/altk-evolve save --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/AgentToolkit/altk-evolve.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save .gemini/skills/save && 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 "save" agent skill from https://github.com/AgentToolkit/altk-evolve/tree/main/platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save into .gemini/skills/save/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "save", 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 AgentToolkit/altk-evolve saveInstalls 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 AgentToolkit/altk-evolve --skill save -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/AgentToolkit/altk-evolve.git skills-src && mkdir -p .github/skills && cp -r skills-src/platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save .github/skills/save && 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 "save" agent skill from https://github.com/AgentToolkit/altk-evolve/tree/main/platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save into .github/skills/save/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "save", 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 AgentToolkit/altk-evolve --skill save -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install AgentToolkit/altk-evolve save --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/AgentToolkit/altk-evolve.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save .opencode/skills/save && 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 "save" agent skill from https://github.com/AgentToolkit/altk-evolve/tree/main/platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save into .opencode/skills/save/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "save", 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.
saveCaptures the current session's successful workflow and saves it as a reusable skill with SKILL.md and helper scripts
Save is an agent skill from AgentToolkit/altk-evolve. Captures the current session's successful workflow and saves it as a reusable skill with SKILL.md and helper scripts
Its SKILL.md is about 3.4k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Agent Workflows. The repository describes itself as: Self improving agents through iterations. The licence is Apache-2.0.
9 steps, taken from the step headings in SKILL.md.
Read from SKILL.md and the folder at commit 8deea81. It shows what the files ask for, not the result of running them.
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.
Shell commands in SKILL.md call:
python3From the folder's file list and the shell code blocks in SKILL.md.
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Save loads about 3.4k tokens when it runs. Until then it costs about 30 tokens; SKILL.md has 1,174 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.
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.
The full file from AgentToolkit/altk-evolve at commit 8deea81, republished under its Apache-2.0 licence (© AgentToolkit). 1,174 words, ~3,387 tokens.
.claude/skills/save/SKILL.md (or your agent's skills folder).This skill analyzes your current successful session and generates a new reusable skill with:
It extracts the workflow pattern from your conversation history (user requests, reasoning steps, tool calls, and responses) and creates parameterized files that can be invoked in future sessions.
Use this skill when you've completed a task successfully and want to save the workflow for future reuse.
Analyze the conversation history available in the current context, which includes:
Action: Review the entire conversation from start to current point
Extract the high-level workflow by:
Example Pattern Recognition:
User Goal: "Read a file and display its contents"
Workflow Pattern:
1. Attempt to read file at expected location
2. If access denied → check allowed directories
3. Search for file in allowed directories
4. Read file from correct location
5. Format and present resultsApply conservative parameterization - only parameterize obvious session-specific values:
Parameterize:
{file_path} or {directory}{filename}{data_value}{project_name}{workspace_dir}Keep Unchanged:
read_file, execute_command)Example:
Original: "Read /home/user/projects/myapp/config.json"
Parameterized: "Read {project_dir}/{config_file}"Analyze the workflow to determine if helper scripts would be beneficial:
Generate scripts when the workflow includes:
Script Types to Consider:
Example:
Workflow includes: Reading JSON file, extracting specific fields, formatting output
→ Generate: parse_and_format.py scriptCreate a new SKILL.md file with the following structure:
---
name: {skill-name}
description: {one-line description of what this skill does}
---
# {Skill Title}
## Overview
{Brief description of the skill's purpose and when to use it}
## Parameters
{List parameters the user needs to provide}
- **{param_name}**: {description and example}
## Workflow
### Step 1: {Step Name}
{What this step does}
**Action**: {Tool or approach to use}
**Example**:{Example tool call or command}
{If helper script exists, reference it}
**Helper Script**: Use `scripts/{script_name}.py` for this operation
{Repeat for each step}
## Helper Scripts
{If scripts were generated, document them}
### {script_name}.py
**Purpose**: {What the script does}
**Usage**:
```bash
python3 plugins/evolve-lite/skills/{skill-name}/scripts/{script_name}.py [arguments]Parameters:
{param}: {description}Example:
python3 plugins/evolve-lite/skills/{skill-name}/scripts/parse_data.py input.json{Common errors and how to handle them}
Input:
Expected Output: {What the user should see}
{Additional guidelines or context}
### Step 6: Generate Helper Scripts
For each identified script opportunity, create a Python script with:
**Script Template**:
```python
#!/usr/bin/env python3
"""
{Script description}
Usage:
python3 {script_name}.py [arguments]
Arguments:
{arg1}: {description}
{arg2}: {description}
"""
import sys
import json
import argparse
from pathlib import Path
def main():
"""Main function implementing the script logic."""
parser = argparse.ArgumentParser(description="{Script description}")
parser.add_argument("{arg1}", help="{description}")
parser.add_argument("{arg2}", help="{description}", nargs="?")
args = parser.parse_args()
# Implementation based on workflow pattern
try:
# Core logic here
result = process_data(args.{arg1})
print(json.dumps(result, indent=2))
except Exception as e:
print(f"Error: {e}", file=sys.stderr)
sys.exit(1)
def process_data(input_data):
"""Process the input data according to the workflow pattern."""
# Implementation extracted from session workflow
pass
if __name__ == "__main__":
main()Script Guidelines:
chmod +x)Ask the user: "What would you like to name this skill?"
Naming Guidelines:
read-file-with-permissions, deploy-to-staging, analyze-logsSuggest a name based on the workflow if the user is unsure:
read-file-with-permission-checkBefore saving, check if a skill with this name already exists:
Action: Check if plugins/evolve-lite/skills/{skill-name}/SKILL.md exists
If exists:
Action: Create the skill directory structure and save all files
plugins/evolve-lite/skills/{skill-name}/plugins/evolve-lite/skills/{skill-name}/SKILL.mdplugins/evolve-lite/skills/{skill-name}/scripts/plugins/evolve-lite/skills/{skill-name}/scripts/{script_name}.pychmod +x plugins/evolve-lite/skills/{skill-name}/scripts/*.pyDirectory Structure:
plugins/evolve-lite/skills/{skill-name}/
├── SKILL.md
└── scripts/ (if applicable)
├── script1.py
└── script2.pyNote: The skill is saved to the user's home directory (plugins/evolve-lite/skills/) making it available across all projects.
Present a clear summary to the user:
✅ Skill saved successfully!
**Skill Name**: {skill-name}
**Location**: plugins/evolve-lite/skills/{skill-name}/
**Files Created**:
- SKILL.md (workflow documentation)
{if scripts}
- scripts/{script1}.py (helper script for {purpose})
- scripts/{script2}.py (helper script for {purpose})
{endif}
**Summary**: {Brief description of what the skill does}
**Workflow Captured**:
1. {Step 1 summary}
2. {Step 2 summary}
3. {Step 3 summary}
...
**Parameters**:
- **{param1}**: {description}
- **{param2}**: {description}
**Helper Scripts**:
{if scripts}
- **{script1}.py**: {what it does}
- **{script2}.py**: {what it does}
{endif}
**To use this skill**: Simply reference it by name in future sessions: "{skill-name}"Session Too Short:
No Clear Workflow:
Skill Name Conflicts:
Invalid Skill Name:
Script Generation Errors:
Session Context:
User: "Read the states.txt file and parse it into a JSON array"
Assistant: [Reads file, parses lines, converts to JSON, outputs result]
User: "Great! Save this as a skill"Generated Skill Name: read-and-parse-file
Parameters Identified:
filename: The file to readoutput_format: Format for output (json, csv, etc.)Workflow Captured:
Scripts Generated:
parse_file.py: Reads a file and converts it to JSON formatFiles Created:
plugins/evolve-lite/skills/read-and-parse-file/
├── SKILL.md
└── scripts/
└── parse_file.pySession Context:
User: "Deploy the app to staging"
Assistant: [Runs tests, builds app, uploads to server, restarts service]
User: "Perfect! Save this workflow"Generated Skill Name: deploy-to-staging
Parameters Identified:
app_name: Name of the applicationserver_address: Staging server addressWorkflow Captured:
Scripts Generated:
run_tests.py: Execute test suite and report resultsdeploy.py: Handle upload and service restartFiles Created:
plugins/evolve-lite/skills/deploy-to-staging/
├── SKILL.md
└── scripts/
├── run_tests.py
└── deploy.pySession Context:
User: "List all Python files in the project"
Assistant: [Uses glob tool to find *.py files, displays results]
User: "Save this"Generated Skill Name: list-python-files
Workflow Captured:
Scripts Generated: None (simple tool call, no script needed)
Files Created:
plugins/evolve-lite/skills/list-python-files/
└── SKILL.mdplugins/evolve-lite/skills/ making them available in all your projects.plugins/evolve-lite/skills/ directory to version control to track skill evolution.© AgentToolkit, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Just SKILL.md in platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save of AgentToolkit/altk-evolve.
Open the folder on GitHubat commit 8deea81
Save 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 |
|---|---|---|---|---|---|---|
| Save this skillAgentToolkit/altk-evolve | 122 | — | ~3.4k | Automated safety check: Pass | Apache-2.0 | |
| MCP Server Builderanthropics/skills | 180k | 64 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Hook Development for Claude Code Pluginsanthropics/claude-plugins-official | 38k | 11 repos | ~4.1k | Automated safety check: Notes | Apache-2.0 | |
| Using Superpowersfarm-fe/farm | 5.6k | 35 repos | ~1.4k | Automated safety check: Pass | MIT | |
| Executing Plans Inlineobra/superpowers | 296k | 2 repos | ~5.1k | Automated safety check: Pass | MIT | |
| Claude Code Agent Developmentanthropics/claude-plugins-official | 38k | 8 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 |
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
anthropics/claude-plugins-official
Explains how to write Claude Code plugin hooks, both prompt-based checks and bash commands, for events such as PreToolUse, Stop and SessionStart.
farm-fe/farm
A skill your agent uses when starting any conversation - establishes how to find and use skills, requiring Skill tool invocation before ANY response including clarifying questions
obra/superpowers
Has the agent carry out an implementation plan itself, task by task in the current session, keeping a ledger, proving each step with a test and ending with one whole-branch review.
anthropics/claude-plugins-official
Explains how to write agents for Claude Code plugins: the markdown file with YAML frontmatter, trigger descriptions, model and color settings, and system prompt design.
Azure/azqr
Create new skills, modify and improve existing skills, and measure skill performance.
AgentToolkit/altk-evolve
Contrasts successful and failed agent runs of the same task and derives guidelines backed by evidence from transcripts, tool calls and outcome judgments.
AgentToolkit/altk-evolve
Turns a saved agent trajectory into a reusable skill with a SKILL.md and supporting scripts, so later sessions can call the workflow instead of rediscovering it.
AgentToolkit/altk-evolve
Copies a memory the agent just saved into the shared evolve store with a retrieval trigger, so it can be shared across a team and audited like other entities.
AgentToolkit/altk-evolve
Has the agent read a project wiki's AGENTS.md and pull the guidelines that fit the task it is about to start, instead of loading the wiki at session start.
AgentToolkit/altk-evolve
Reads a normalized Claude Code trajectory JSON and turns its errors and solutions into reusable guideline pages in wiki-twobatch/guidelines.
AgentToolkit/altk-evolve
Ingest one or more agent trajectories (raw bob/claude traces or normalized JSON) into an agent-wiki end-to-end — convert, summarize, extract guidelines, synthesize skills, optionally compare…
Categories
Captures the current session's successful workflow and saves it as a reusable skill with SKILL.md and helper scripts. Save is an agent skill from AgentToolkit/altk-evolve.
Save fits situations like: agent Workflows work in your project.
Run `npx skills add AgentToolkit/altk-evolve --skill save -a claude-code`. Or copy the skill folder (platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save in AgentToolkit/altk-evolve) into .claude/skills/save in your project. Claude Code loads it when a task matches its description.
Run `npx skills add AgentToolkit/altk-evolve --skill save -a codex`. Or copy the skill folder (platform-integrations/codex/plugins/evolve-lite/skills/evolve-lite/save in AgentToolkit/altk-evolve) into .agents/skills/save in your project. Codex loads it when a task matches its description.
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add AgentToolkit/altk-evolve --skill save -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/save, .gemini/skills/save, .github/skills/save and .opencode/skills/save in your project.
Going by SKILL.md and its folder, Save needs the command-line tools its instructions call (python3). Our summary lists: Python 3.
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.
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.
Save is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
About 3.4k tokens (SKILL.md is roughly 14k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
Skills that share tags, products or a category with Save: MCP Server Builder (anthropics/skills, 180k stars), Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars), Using Superpowers (farm-fe/farm, 5.6k stars) and Executing Plans Inline (obra/superpowers, 296k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
AgentToolkit (a GitHub organization) maintains it in AgentToolkit/altk-evolve, which has 122 GitHub stars. The repository holds 21 skills in this directory. The repository was last updated on October 8, 2026.
Source: AgentToolkit/altk-evolve on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.