te-guide

name	te-guide
description	Use this skill when users ask "how does tool executor work", "how to use execute_code", "workspace API", "MCP client examples", "search_tools examples", "context-efficient patterns", or need guidance writing code for the Tool Executor sandbox.
metadata	{"author":"elb-pr"}

Claudikins Tool Executor Guide

The Tool Executor wraps 7 MCP servers into 3 context-efficient tools. Master this workflow to reduce token consumption from ~50k to ~1.1k.

The Three-Tool Workflow

search_tools → get_tool_schema → execute_code

Step 1: Search for Tools

Find relevant tools with semantic search:

const result = await mcp__tool-executor__search_tools({
  query: "generate diagram",
  limit: 5
});
// Returns: { results: [{ name, server, description }], source, has_more }

Search tips:

• Use natural language: "create flowchart", "fetch webpage", "AI reasoning"
• Results are slim - just name, server, one-liner
• Use offset for pagination when has_more is true

Step 2: Get Full Schema

Before calling a tool, get its complete specification:

const schema = await mcp__tool-executor__get_tool_schema({
  name: "gemini_generateContent"
});
// Returns: { name, server, description, inputSchema, example, notes }

Why this step matters:

• inputSchema shows all parameters, types, and required fields
• example shows working code you can adapt
• notes contains gotchas and tips

Step 3: Execute Code

Run TypeScript in the sandbox with pre-connected MCP clients:

const result = await mcp__tool-executor__execute_code({
  code: `
    const response = await gemini.gemini_generateContent({
      prompt: "Create a flowchart description for user authentication"
    });
    console.log("Generated:", response._savedTo || "inline");
  `,
  timeout: 30000
});

Available MCP Clients

All clients are pre-connected and available as globals:

Client	Purpose
serena	Semantic code search (REQUIRED - cannot be removed)
context7	Library documentation lookup
gemini	AI model queries, image generation, diagrams
notebooklm	Research and notes
shadcn	UI component generation
apify	Web scraping
sequentialThinking	Reasoning chains

Client Usage Pattern

// All clients use the same pattern:
const result = await clientName.tool_name({ param: value });

// Examples:
await serena.find_symbol({ name_path: "MyClass" });
await gemini.query_gemini({ prompt: "Explain this code" });
await context7.resolve_library_id({ libraryName: "react" });

Workspace API

Persistent file storage scoped to ./workspace/. All paths are protected against traversal.

Text Operations

await workspace.write("notes.txt", "Hello world");
const content = await workspace.read("notes.txt");
await workspace.append("log.txt", "New line\n");
await workspace.delete("temp.txt");

JSON Operations

await workspace.writeJSON("data.json", { key: "value" });
const data = await workspace.readJSON("data.json");

Binary Operations

await workspace.writeBuffer("image.png", buffer);
const buffer = await workspace.readBuffer("image.png");

Directory Operations

const files = await workspace.list("subdir");
const matches = await workspace.glob("**/*.json");
await workspace.mkdir("nested/path");

Metadata

const exists = await workspace.exists("file.txt");
const stats = await workspace.stat("file.txt");
// stats: { size: number, mtime: Date, isDir: boolean }

MCP Results Cleanup

// Clean up auto-saved MCP responses older than 1 hour
const deleted = await workspace.cleanupMcpResults();

Context-Efficient Patterns

Auto-Save for Large Responses

MCP responses over 200 characters are automatically saved to workspace:

const response = await context7.get_library_docs({
  context7CompatibleLibraryID: "/react/react"
});

// If large, response becomes:
// { _savedTo: "mcp-results/1234.json", _size: 5000, _preview: "...", _hint: "..." }

// Read full result when needed:
const full = await workspace.readJSON(response._savedTo);

Console Output Summarisation

Total console output over 500 characters is summarised. Keep logs concise:

// Good - concise logs
console.log("Created 5 files");
console.log("Done");

// Avoid - verbose output that gets truncated
console.log(JSON.stringify(largeObject, null, 2));

Batch Operations

Minimise round-trips by batching work:

// Good - single execution with multiple operations
await mcp__tool-executor__execute_code({
  code: `
    const [lib1, lib2] = await Promise.all([
      context7.resolve_library_id({ libraryName: "react" }),
      context7.resolve_library_id({ libraryName: "vue" })
    ]);
    console.log("Resolved both");
  `
});

Common Patterns

Generate Content with Gemini

const response = await gemini.gemini_generateContent({
  prompt: `Create a detailed flowchart description:
    - User submits request
    - Search for relevant tools
    - Get tool schema
    - Execute code in sandbox
  `
});
await workspace.write("flowchart.md", response.content[0].text);
console.log("Saved flowchart.md");

Search Codebase with Serena

const results = await serena.find_symbol({ name_path: "executeCode" });
console.log("Found:", results.content[0].text);

AI-Assisted Analysis

const code = await workspace.read("analysis-target.ts");
const analysis = await gemini.query_gemini({
  prompt: `Analyse this code for potential issues:\n\n${code}`
});
await workspace.write("analysis.md", analysis.content[0].text);

Error Handling

Errors in execute_code return structured results:

const result = await mcp__tool-executor__execute_code({
  code: `throw new Error("Something broke")`
});
// result: { logs: [...], error: "Something broke", stack: "..." }

Common errors:

• Timeout: Increase timeout parameter or chunk work
• MCP connection failed: Check server is configured, try later
• Path traversal blocked: Workspace paths must stay within ./workspace/

Source Code Reference

For implementation details, see:

• ${CLAUDE_PLUGIN_ROOT}/src/sandbox/runtime.ts - Execution engine
• ${CLAUDE_PLUGIN_ROOT}/src/sandbox/workspace.ts - Workspace API
• ${CLAUDE_PLUGIN_ROOT}/src/sandbox/clients.ts - MCP client management
• ${CLAUDE_PLUGIN_ROOT}/src/search.ts - Tool search implementation

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