Skip to the card

Card 016 of 9982026-09-04 issue

Observed arrival · 2026-09-04

agentfootprint: an audit trail for TypeScript agents

agentfootprint.dev Observed source
Editorial interest 84/100 Selection signal · not a rating of the site

An open-source TypeScript framework that traces agent context, decisions, tools, and outcomes, then replays runs to test what caused a result.

Landing page captured for the 2026-09-04 issue.

Field notes

The framework represents agent behavior as a traversable skill graph: the current state determines which procedure, tools, model, and instructions enter the working set. Its artifact path keeps large tool results outside model context and passes a reference ticket instead. For debugging, the site describes five inspection views and a rerun workflow that removes selected sources, while the homepage states figures of 21,800+ monthly npm installs and 9,800+ tests per release.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

OpenPublic substance visible
PrettyNotable craft visible
ProPolished or operationally mature
NicheUnusually specific use
ƒJavaScriptBrowser-side code central

One card from the complete issue

An Octave Below the Spacecraft

377,806 arrived 1,000 judged 998 catalogued Enter the complete issue
agentfootprint.dev

Landing page observed 2026-09-04. The live site may have changed.