This is an excellent breakdown — especially the part about the virtual filesystem context engineering being what actually makes long-running agents reliable. I’ve been experimenting with building a simple coding agent recently, and the difference between a plain ReAct loop and something with persistent state subagents is night and day. Without the harness layer, it almost always falls apart after 4–5 steps. Quick question: When you’re using DeepAgents (or building your own), how are you handling tool approval / human-in-the-loop in practice for coding tasks? Do you find yourself using interrupt_on heavily, or do you rely more on the sandbox review subagent pattern? Also really liked the point about skills being files you can version. That feels like the right abstraction. Looking forward to seeing what you ship on Railway 👀

It's great! windows will be better except the reverse slash filesystem😭

ZeroFS makes S3 behave like a real filesystem and block device (NFS / 9P / NBD), with microsecond latencies, always-on encryption, and S3 pricing.

🐧 Day 1 · Linux Fundamentals & Filesystem Before you automate anything, you have to understand the machine you're standing on. How Linux is actually built - 4 layers: Hardware → Kernel → Shell → User Programs The kernel talks to hardware. The shell (Bash) is how you talk to the kernel. Master that conversation and the rest of DevOps opens up. Distros aren't different operating systems - same kernel, different packaging: → Debian family (Ubuntu, Debian) → apt → Red Hat family (RHEL, CentOS, Fedora) → yum/dnf Learn the filesystem map - you'll live in it daily: /etc = configs · /var = logs · /home = users · /bin = essential commands · /proc = live kernel info And the rule that explains everything: in Linux, everything is a file - even devices and processes. Your first 4 commands to run right now: pwd # where am I? ls -lah # list files (long, all, human sizes) cd /var/log whoami # which user am I? ⚠️ One trap to remember: / is the root of the tree. /root is the root user's home. Don't confuse them. That's Day 1. You now understand the structure. Tomorrow we move fast through essential commands & navigation. Save this. Day 2 drops tomorrow. 🚀

Agent harnesses feel like the shift from “clever prompt” to “actual operating environment.” The virtual filesystem piece is underrated.

My daily usage: roughly half of all tool calls flow through MCP servers. Filesystem, Buffer, R2, calendar. The non-MCP integrations feel ancient.

ZeroFS makes S3 behave like a real POSIX filesystem and block device (NFS / 9P / NBD), with microsecond latencies, always-on encryption, and S3 pricing.

“Context compression finally works in production" - cool… but if your AI is just a chat window, you're still just compressing chat logs. The real unlock is an AI that lives in your filesystem and understands your entire project state without you having to explain it.

It reimplements all syscalls outside the emulated environment and can thus control what the application can and can not do. E.g. it can provide a virtual filesystem, to prevent hackers from accessing files on your disk.

You shouldn't be creating users noted down in the legacy posix filesystem stuff, NSS exists and systemd provides libs for it, so DynamicUser=true|<theusernameyouwant> works pretty well. A lot of nixos modules providing services don't do this and are stuck in legacy With LLMs it's actually pretty easy to scour through options a service can have and reflect them verbatim. Fable was pretty good at that, it'll be back

Favorite detail: the extractor LLM is sandboxed to its workspace dir, so system files are invisible to it. A boundary the filesystem enforces, not a polite prompt. It stays local by default — the pyramid is readable files on your own machine. (I build MNMNOTE, full disclosure.)

ArxCode CLI is a private AI coding agent that runs 100% on your machine. 🔒 Your code never leaves your terminal 🔑 BYOK — use Groq (FREE), DeepSeek, Claude, GPT, Grok, Gemini 🖥️ Real filesystem. Real shell. Zero VFS simulation. This is what Claude Code should've been.

Good framing. The harness giving the model a body is also the safety boundary. Shell and filesystem access are powerful only if the run records what changed, which permissions were used, and where a human review has to happen.

🐧 Day 12/30 — #Linux Storage management is a fundamental skill for every Linux administrator. Before a disk can store data, it must be partitioned, formatted with a filesystem, and mounted into the Linux directory structure. Linux Disk Management – Partitioning, Formatting, and Mounting Understanding how Linux handles disks helps you manage storage efficiently and avoid data-related issues on servers and workstations. Key Disk Management Concepts: → Partitioning → Formatting → Mounting Partitioning Disks A partition is a logical section of a physical disk. Partitioning allows a single disk to be divided into multiple independent storage areas. Common tools: → fdisk → parted → lsblk Example: → sudo fdisk /dev/sdb Opens the partition manager for a disk. Viewing Available Disks → lsblk Displays all connected storage devices and partitions. → df -h Shows mounted filesystems and available disk space in a human-readable format. Formatting Partitions After creating a partition, it must be formatted with a filesystem. Common Linux filesystems: → ext4 → xfs → btrfs Example: → sudo mkfs.ext4 /dev/sdb1 Formats the partition using the ext4 filesystem. Mounting Filesystems Linux accesses storage through mount points. A partition must be mounted before it can be used. Example: → sudo mount /dev/sdb1 /mnt/data Makes the partition accessible through the /mnt/data directory. Viewing Mounted Filesystems → mount Lists currently mounted filesystems. → df -h Displays mounted storage and available space. Persistent Mounting To automatically mount a partition during boot, administrators configure: → /etc/fstab This file defines permanent mount settings for disks and partitions. Why Disk Management Matters: → Add new storage to Linux servers → Manage application and database data → Monitor disk usage effectively → Prevent storage-related outages → Configure reliable production environments Mastering partitioning, formatting, and mounting is an essential step toward becoming a skilled Linux administrator, DevOps engineer, or cloud engineer. 🐧 Grab Linux Ebook: codewithdhanian.gumroad.com/… #Linux #LinuxTutorial #DiskManagement #LinuxCommands #SystemAdministration #DevOps #CloudComputing #OpenSource #Storage #100DaysOfCode

Maybe it isn’t the filesystem that’s fragile — but like most things, it’s how people set it up. Lifetime discipline, deep understanding of the tech, and staying ruthlessly organized makes all the difference. The directory logic is battle-hardened and tested over 50 years of computing.