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counterfact-repl

Official

Control Counterfact mocks in real time.

Software Engineering#repl#state-management#admin-api#api-mocking#counterfact
Authorcounterfact
Version1.0.0
Installs0

System Documentation

What problem does it solve?

AI agents often need to interact with a live API mock to inspect and adjust runtime state, proxy decisions, and endpoint behavior without restarting servers.

Core Features & Use Cases

  • Admin API access to health, contexts, config, routes, and proxy for on-demand management.
  • A JavaScript REPL to modify mock state and script behavior at runtime.
  • Proxy mode to selectively route paths to real backends while maintaining mocked responses.
  • Hierarchical contexts with smart diffing for efficient updates across nested paths. Use cases include inspecting current state, simulating failures, switching between mock and proxy, and batch data setup.

Quick Start

Start a Counterfact server, then call GET /_counterfact/api/health to verify it is running and begin manipulating state.

Dependency Matrix

Required Modules

None required

Components

Standard package

💻 Claude Code Installation

Recommended: Let Claude install automatically. Simply copy and paste the text below to Claude Code.

Please help me install this Skill:
Name: counterfact-repl
Download link: https://github.com/counterfact/api-simulator/archive/main.zip#counterfact-repl

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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