paultyng/testagent

testagent is a deterministic fake CLI that mimics Claude/Codex command behavior without a model, network, or API keys. It’s intended for developers who build or test hook handlers and for CI pipelines that shell out to `claude`/`codex` and need reproducible runs. Key features: - Emits the same JSON hook payloads and stream-json frames real Claude would use (argv-compatible). - Supports scripted REPL commands like /fake-tool and /fake-tool-result for local iteration. - Hook handler types: Type="http" and Type="command" (pipes event JSON to a command or POSTs it). - Installable via `go install` or used as a Go tool module for pinned CI versions. - Provides a compatibility matrix (COMPATIBILITY.md). Limitations: no model generation, not all hook events or handler types implemented, and it doesn’t fake an MCP server. Licensed MIT.

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