ZeroLabs — AI agents, infrastructure, and technical guides

How to Build an MCP Server with TypeScript SDK

Build deterministic Model Context Protocol servers in TypeScript using the official MCP SDK, Zod schema validation, tools, and typed resources.

Configure Stdio and SSE Transports in MCP

Configure Stdio and Server-Sent Event transports for Model Context Protocol servers with session lifecycle management and resilient streaming.

Sep 17, 2026|17 min read

How to Integrate and Sandbox Claude Bash Tool

Integrate Claude bash tools with container sandboxes, timeout management, output capture, and safe execution loops in Python and TypeScript.

Deterministic File Edits with Text Editor Tool

Execute deterministic file edits with Anthropic text editor tool using view, create, str_replace, and insert operations with strict validation guardrails.

How to Provision and Sandbox Claude Computer Use

Provision isolated virtual desktop sandboxes for Claude Computer Use with Xvfb, fluxbox, base64 visual feedback, and human-in-the-loop security boundaries.

How to Handle Strict Tool Use and Error Recovery

Implement resilient Claude tool use and error recovery loops with is_error diagnostics, bounded retry budgets, and fail-safe circuit breaker patterns.

Sep 17, 2026|16 min read

How to Define and Register Tools with Claude

Define JSON schema tools in Claude Messages API requests. Configure tool choice strategies and parse tool use blocks across Python, TypeScript, and cURL.

How to Handle Parallel Tool Execution and Results

Execute multiple Claude tool_use calls concurrently using asyncio or Promise.all, map responses to tool_use_id, and handle partial failures.

How to Handle Schema Mismatches and Repair Loops

Implement multi-turn schema repair loops for Claude responses. Catch Pydantic and Zod validation errors and repair malformed structured JSON outputs.

Sep 17, 2026|14 min read

How to Enforce JSON Schema Structured Outputs

Stop Claude from adding markdown backticks or conversational text before JSON. Enforce strict JSON Schema compliance for automated pipelines.

Validate Pydantic and Zod Schemas with Claude

Fix 'pydantic.ValidationError: Field required' and Zod schema mismatches. Validate Claude response payloads with type-safe Python and TypeScript models.

How to Stream Thinking Blocks to User Interfaces

Fix 'Unhandled event type thinking_delta'. Stream Claude reasoning traces and final responses cleanly to React and web UIs with SSE handlers.

How to Configure Thinking Budget and Effort

Resolve 'thinking.budget_tokens must be >= 1024' and max_tokens conflicts. Calibrate Claude 3.7 Sonnet extended thinking budgets accurately.

Sep 17, 2026|11 min read

Extract Reasoning Traces and Thought Signatures

Fix 'AttributeError: ThinkingBlock has no attribute text'. Extract Claude reasoning traces, inspect thought signatures, and echo thinking blocks safely.