Production AI Agent Systems

Architecture, tools, memory, evaluation, security and deployment for AI Agents that must operate beyond a demo.

Decision Paths

Start from the decision you need to make now, then enter the deeper topic map.

Primary Paths

Related Resources

RecalAI hybrid retrieval from exact and semantic matching to weighted fusion and cited answers - XBSTACK

Why Vector Search Alone Isn't Enough for Personal AI: RecalAI's Hybrid Retrieval Design

Ai
2026-10-23
Read Article
7 min
Conceptual LFM2.5-24B-A2B on Mac cover depicting local MoE routing, GGUF and MLX; not actual benchmark evidence - XBSTACK

LFM2.5-24B-A2B on Mac: Memory Requirements, GGUF vs MLX

Ai
2026-10-18
Read Article
6 min
Illustrative Gemini 4 Argon coding-agent evaluation concept; the terminal-like panels do not represent a completed live Gemini model benchmark - XBSTACK

Gemini 4 Argon: Capabilities, Pricing, Migration, and a Real-Project Evaluation Plan

Ai
2026-10-14
Read Article
7 min
EmbeddingGemma 2 on a Mac CPU with PDF/DOCX document conversion, chunked FTS5 and 256d/768d vector retrieval experiment - XBSTACK

EmbeddingGemma 2 Local Retrieval Test: Mac 270M, PDF/DOCX, 256d vs 768d

Ai
2026-10-10
Read Article
8 min
Personal AI Agent Architecture cover showing memory, permissions, apps and tools, local devices and cloud runtimes around a personal agent - XBSTACK

Personal AI Agent Architecture: Memory, Permissions, App Actions and Local-vs-Cloud Design

Ai
2026-10-06
Read Article
9 min
AI Agent Sandbox security isolation architecture comparing hosted and self-hosted environments across files, network access, secrets, and tenant boundaries - XBSTACK

AI Agent Sandbox Design: Hosted vs Self-Hosted, Files, Secrets, Network, and Persistence

Ai
2026-09-26
Read Article
8 min
Apple M1 Pro comparison of Transformers GGUF full dequantization on PyTorch 2.14, packed GGUF on 2.13, and llama.cpp Metal - XBSTACK

Transformers GGUF “Dequantizing the whole model” Fix: PyTorch Version Test on Apple Silicon

Ai
2026-09-26
Read Article
6 min
AI Agent Decision Models architecture showing Rules flowing through a Decision Layer into an LLM and verification before actions - XBSTACK

AI Agent Decision Models: OpenAI Decisions API, Jev, Routing and Confidence Gates

Ai
2026-09-25
Read Article
12 min
OpenAI Agents API, Agents SDK, and Responses API compared by who owns the Agent Loop - XBSTACK

OpenAI Agents API vs Agents SDK vs Responses API: Who Should Own the Agent Loop?

Ai
2026-09-16
Read Article
13 min
Google ADK delete_session removing a Session while long-term Memory remains searchable in the 2.8.0 and 2.9.0 reproduction - XBSTACK

Google ADK delete_session() Does Not Delete Long-Term Memory: 2.8.0/2.9.0 Reproduction

Ai
2026-09-15
Read Article
6 min
LangGraph conditional router exception followed by a resume that skips the downstream node, compared with the safer node-based routing path - XBSTACK

LangGraph Resume Skips the Downstream Node After a Conditional Router Exception: 1.2.11 Reproduction and Workaround

Langgraph
2026-09-11
Read Article
8 min
OpenAI Outcome-Based Pricing English cover showing the AI agent value chain from tokens and compute to tasks, verified outcomes and ROI - XBSTACK

OpenAI Is Testing Outcome-Based Pricing: Why AI Agents May Move Beyond Token Billing

Ai
2026-09-10
Read Article
10 min
Funes Agent Memory tested with Codex recall, stale-memory conflicts, and local privacy boundaries - XBSTACK

Funes Agent Memory Tested: Codex Recall, Stale Memory, and Local Privacy Boundaries

Ai
2026-09-09
Read Article
10 min
LangGraph checkpoint round-trip losing ZoneInfo and fold, causing a one-hour DST wall-clock shift after resume - XBSTACK

LangGraph Checkpoint Loses ZoneInfo and fold: Why DST Can Shift by One Hour After Resume

Ai
2026-09-07
Read Article
6 min
LangGraph process crash before the first durable checkpoint with an application acceptance ledger preserving the accepted run for recovery - XBSTACK

LangGraph First Checkpoint Crash: Why an Accepted Run Can Disappear

Ai
2026-09-06
Read Article
7 min
Context engineering routes system instructions, user tasks, retrieval, memory, tools, state and compacted history into an AI agent to produce grounded answers, completed tasks and lower context cost - XBSTACK

What Is Context Engineering? Reducing AI Agent Cost with Retrieval, Tool Search and Memory

Ai
2026-09-04
Read Article
10 min
GPT-6 Astra API English cover showing pricing, 1.05M context, 128K output and Responses API migration - XBSTACK

GPT-6 Astra API Guide: Pricing, Claude/Gemini Comparison, 1.05M Context and Migration

Ai
2026-09-04
Read Article
11 min
Gemini 3.8 Flash versus 3.7 Flash for coding, agents, pricing and per-task token cost - XBSTACK

Gemini 3.8 Flash vs 3.7 Flash: Same Price, Different Agent Cost?

Ai
2026-09-03
Read Article
6 min
Claude Fable 5.1 vs Mythos 5.1 comparison of pricing, access, coding, and agent use cases - XBSTACK

Claude Fable 5.1 vs Mythos 5.1: Pricing, Access, Coding, and Agent Trade-offs

Ai
2026-09-02
Read Article
5 min
MCP configuration security review for secrets, shell, remote MCP, and permissions - XBSTACK

How to Security-Check an MCP Configuration: Secrets, Shell, Remote MCP, and Permissions

Ai
2026-08-31
Read Article
5 min
LangGraph aupdate_state raising Ambiguous update after a START seed while synchronous update_state succeeds - XBSTACK

LangGraph aupdate_state 'Ambiguous update': Why Async Fails When update_state Works

Ai
2026-08-26
Read Article
6 min
OpenAI Zero Data Retention architecture for AI agents across Responses API, MCP, memory, audit and data residency - XBSTACK

OpenAI Zero Data Retention for AI Agents: Responses API, MCP and Data Boundaries

Ai
2026-08-20
Read Article
9 min
Google ADK 2.6.2 state_delta not applied to session.state when Runner.run_async resumes without new_message - XBSTACK

Google ADK Resume Bugs: state_delta Loss and the 2.7.0 A2A HITL Regression

Ai
2026-08-09
Read Article
8 min
Two OpenAI Agents SDK FunctionTools named lookup are registered while local dispatch keeps only the later tool - XBSTACK

OpenAI Agents SDK Duplicate Tool Names: Why the Later Tool Wins

Ai
2026-08-03
Read Article
9 min