Tool Call Timeline

v1.0.0·Added in 1.0.0

What an AI agent did, step by step: each tool call with its status, time, input and output, plus approval and retry.

Each call is a row: a round marker says its status (a dashed ring while queued, a spinner while it runs, a check that pops once when it finishes, a cross when it fails, a hand that pings while it waits for a person), then a human title, the tool's id in a small mono chip and how long it took. A running call's title shimmers and its time ticks in tenths of a second. Click or tap a row, or press Enter or Space on it, to open its input and output as highlighted JSON (text results wrap), its error and its logs; long blocks scroll inside themselves and every block has a copy button. A call that waits for approval shows Reject and Approve; a failed one opens by itself and shows Retry; a button whose handler returns a promise spins until it settles, and focus moves back to the row when the buttons go away. Sub-steps sit indented under their step. The card variant adds a header with the run's state (a spinner, or Needs approval, Failed, Done in words; a hand or an alert in its icon tile when a person is needed or a call failed, which alone carries it in a card narrower than 448px), its progress while it runs (2 of 5 done) and total time, and a button that opens or closes every row at once; the inline variant is a one-line summary (Used 4 tools, 2.8 s) that opens by itself while a call runs or waits for approval and closes again 1.2 s after everything finished, unless you opened it yourself or focus is inside it (you just approved a call), so focus never drops to the page. Status changes are announced once each to screen readers. Rows lay out by their own width, so a timeline in a chat column or a side panel fits: when a row is narrow the tool id moves under the title and Approve and Reject share the width; on a phone they are 44px tall, rows have 44px targets and code blocks scroll sideways inside themselves. Reduced motion swaps the springs for quick fades and stops the shimmer and the ping.