Agent Runtime is the live operator view of every task currently running in the fleet. Each task has a wall-clock budget (default 5 minutes); tasks over budget are flagged and can be stopped one-click. Use it to spot runaway tasks, cancel them, and learn what classes of work need a longer budget.
Each task class has a budget. Quick classes (route alerts) have 60s; medium classes (vacuum, scale) have 5m; long classes (large migrations) have 30m. Tasks over budget are visually flagged and can be cancelled by an operator. The platform also auto-cancels at 2x budget unless the task class explicitly opts out.
When you cancel a task, the runtime first attempts a graceful stop: in-flight tool calls finish, partial state rolls back to the last checkpoint. If the task does not respond to graceful stop within 10s, the runtime hard-stops it. Either way, no half-applied changes survive a cancel. The cancel reason and operator id land in Agent Ledger.
Each running task shows live token usage, wall-clock duration, and tools called so far. The data lets operators decide whether a task that is taking too long is doing real work (lots of tool calls, lots of tokens) or stuck (no progress in 30s). Same data feeds Cost Circuit Breaker for spend attribution.
When a class is consistently over budget, that is a tuning signal. The page reports per-class p95 duration and flags classes that exceed their budget more than 5% of the time. Either the budget is too tight or the class is running expensive work that should be split.
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Runaway tasks waste tokens and risk side-effects. The runtime page makes them visible and stoppable.