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

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
Experiment showing a LangGraph streaming UI ahead of the authoritative SQLite checkpoint after cancellation - XBSTACK

LangGraph State Lost After Cancel: Why Streaming Output Disappears After Stop

Ai
2026-07-30
Read Article
16 min