Tag: agents
All the articles with the tag "agents".
-
Prompt Caching Is a Harness Design Problem, Not Just an API Toggle
A 186-request test shows why cache savings depend on stable tools, deterministic prefixes, deliberate breakpoints, routing keys, and measurement inside the agent harness.
-
Building AI Voice Agents with Amazon Nova Sonic and LiveKit: Patterns, Architecture, and a RAG Latency Surprise
Patterns that held up across a series of Nova 2 Sonic + LiveKit voice agents, a telephony architecture that took a real phone call, and a latency finding that contradicts the standard advice on voice RAG.
-
Four Tools, One Loop: The AgentCore Knowledge Worker
An agent that only calls APIs hits a wall when the answer lives in a rendered page, a computation, or last month's session. I wired a four-tool loop inside an AgentCore Runtime — search, browser, Code Interpreter, Memory — and ran it live. The prescriptive prompt is the product surface; the infrastructure is fixed.
-
AgentCore Browser: A Managed, Isolated Browser an Agent Can Drive
Some tasks only exist on a screen. The reflex is to run Playwright on a box. AgentCore Browser is the managed alternative: a per-session, isolated Chromium you drive over CDP, with session isolation, live-view human takeover, and replay-to-S3 audit built in. Here's what the primitive is, how you reach it, and the ceiling it doesn't cross.
-
Beyond Semantic Retrieval: Metadata Filtering in Agent Memory
Semantic search finds things that sound related. Sometimes you need a WHERE clause instead — filter by priority, by date, by category. I tested metadata filtering in AgentCore Memory and found a quiet gate: custom keys silently drop unless declared as indexed keys. Here's what works and what decides whether any of it works at all.
-
Bedrock Managed Knowledge Bases as a Native Gateway Tool
AgentCore Gateway now ships a native bedrock-knowledge-bases connector that replaces the Lambda wrapper entirely. Attach the KB to the Gateway and it auto-exposes Retrieve and AgenticRetrieveStream over MCP. The constraint: it only works with Managed Knowledge Bases, not customer-managed ones.
-
AgentCore Registry Is a Governed Catalog for Agent Interfaces
Hardcoded runtime ARNs are the visible pain, and Registry does fix them — but agent discovery is fundamentally a governance problem, not a routing problem.
-
An Agent That Can Pay for Its Tools
Payment is not a tool call—it is a governed financial action. An agent that pays requires user consent, credential isolation, session budgets, policy checks, and a proof path the model cannot bypass.