Development

Agent queues, deadlines and fallbacks

• A Deadline That Propagates Through Every Tool Call in a Run
• Backpressure Between an Agent and Its Tools: Caps and Queues
• Ordering a Fallback Ladder by Cost and Latency
• Setting a Concurrency Cap from Downstream Latency and Errors
• Testing a Fallback Ladder Without Spending on the Top Rung
• Using Signed Webhooks to Trigger Agent Runs Safely
• A Circuit Breaker Between an Agent and a Degraded Tool
• A Concurrency Cap Between Sub-Agents: Limiting the Fan-Out Width
• A Cost Per Accepted Answer on the Backup Rung
• A Fallback Ladder That Fails Closed: When No Rung May Answer
• A Latency Budget for a Multi-Step Agent Run
• A Queue for Agent Work: Priorities, Fairness and Starvation
• A Timeout Budget for a Multi-Step Agent Run
• An Error Budget for a Fallback Ladder
• Is the Loop the Model or the Tool? A Triage Order
• Queueing Agent Work: Visibility Timeouts and Fairness
• Reading a Model Timeout from the Client Side
• Reading Agent Traces for Saturation: Queue Wait Versus Service
• Refusal Codes for a Tool That Misses Its Deadline
• Routing Agent Tool Calls by Priority Without Starving Work
• Timing a Fallback Rung in Production: Spans and Percentiles
• Turning a Retry-After into a Queue Delay the Agent Can Trust
• When a Tool Cannot Honor the Deadline: Fallbacks