Agent observability · interactive lab

Context Hooks
Activity Lab

Watch an agent’s lifecycle become a clean, searchable event stream. Load a sample run or submit your own hook payload and inspect how secret-like fields are redacted.

● LOCAL DEMO · NO SERVER
🔒 This demo runs entirely in your browser. Events never leave this page; values under keys such as api_key, token, password, and secret are masked before display.
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Recent hook events

PreToolUsePostToolUseUserPromptSubmittool.execute.before

Try a sample payload

Paste a hook JSON object. The normalizer accepts common event and tool field names.

Inspired by the Hugging Face Context Course lesson on lifecycle hooks. A production setup pairs an HTTP receiver with a dashboard; this free static Space demonstrates the event UI safely without a backend.