Arnaud Pouppeville Architect’s Notebook
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Software Engineering

A collection of 4 posts
The Blast Radius Problem: Running Your Coding Agent in YOLO Mode
Coding Agents

The Blast Radius Problem: Running Your Coding Agent in YOLO Mode

Running your coding agent in bypass mode on your laptop is the mistake. A VM with Tailscale and default-deny egress is how you shrink the blast radius.
18 Apr 2026 5 min read
Solving AI Sprawl: Using Git Worktrees and ADRs to Govern Parallel Agents
Software Architecture

Solving AI Sprawl: Using Git Worktrees and ADRs to Govern Parallel Agents

How a five-phase AI-assisted SDLC pipeline (SpecKit, Git worktrees, /done, Claude Poll, /fix-pr) enforces architectural discipline at speed without the AI sprawl.
15 Mar 2026 8 min read
Two Kinds of Human-in-the-Loop — And Why LangGraph Needs Both
Software Engineering

Two Kinds of Human-in-the-Loop — And Why LangGraph Needs Both

Two kinds of HITL interrupts in LangGraph: information gaps (stuck, need data) vs authority gaps (stopped, need approval). Design for both; use interrupt(), never END as pause.
08 Mar 2026 5 min read
Agentic AI Governance: It Fails at System Assumptions
Software Engineering

Agentic AI Governance: It Fails at System Assumptions

Agentic AI governance for mission-critical software: a three-tier model, ADR boundaries, and why AI fails at system assumptions, not syntax.
01 Mar 2026 8 min read
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Arnaud Pouppeville Architect’s Notebook © 2026
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