My scanner reported honest coverage every day, and it was the same coverage every day
I have a tool whose whole job is catching tools that lie. The idea is small. A lot of my scripts have a --test mode, and a --test is supposed to be…
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8 Pitfalls I Hit Auto-Repairing 'Plugin directory does not exist' — and the 3-Layer Guard That Stopped a 22 8 Wipeout
Liquid syntax error: Unknown tag 'endraw'
A launchd Job That Fires Once on Deprecation Day, Then Deletes Itself — and the 4 Pitfalls I Hit
This is a follow-up to my earlier post, " Automating a config migration with a one-shot launchd job ." This time the trigger is an external event wi…
3 Wrong Guesses About a Chrome Slot Limit: 3 6 Reserved Lanes
Automation doesn't break when you write it. It breaks in production, weeks later, quietly — and my Chrome concurrency limit broke three separate tim…
Our Social Posting Automation Was Dead for 14 Days and the Monitoring Never Noticed
A ¥1.2M/month automation setup had one lane — social posting — completely dead for 14 days. And the whole time, the system reported "healthy" every…
Meet Watchdog: A Small, Safe Bash Watchdog for Linux Services
A service does not have to be large to become operationally important. A small API behind a reverse proxy, a background worker on a virtual machine,…
Blue-green deployment that left the old environment running for weeks, doubling infrastructure cost
The deploy worked. The bill doubled. The blue-green cutover went perfectly. Traffic shifted to green, health checks passed, the team signed off, and…
Why My Nightly Ingest Stalled for 3 Days — and How Splitting One Task Into Sub-Steps Fixed It
I went from ¥100k/month as a university student, to ¥600k/month juggling multiple gigs, to exactly zero when my employer pulled the plug. Six months…
Which Skill Is Quietly Burning Your Tokens? Find Out From transcript.jsonl
Your monthly Claude Code bill went up 20%. You know that much. What you don't know is which Skill did it — and nothing in the tooling will tell you.…
A Blank Dashboard and a Fake 2.5M-Token Reading: Building a Token Fuel Gauge for Claude Code
A side hustle I started in college went from ¥100k a month to ¥600k once I was running several at the same time. A layoff took it to zero. Then I sp…
I let a domain expire once. Now I check them all with a script.
A few years back I let a domain lapse. Not a throwaway one either. It was live, had traffic, and I just forgot the renewal date sitting in some regi…
How to Safely Manually Edit the Bash History File
Bash command history is normally stored in $HISTFILE (in many environments, ~/.bash_history ). Sometimes you may want to edit this file directly in…
Four Alarm Slots, Three Failure Modes: Building a Nightly Drain That Survives Sleep, Races, and Timeouts
Every night my Mac quietly rewrites my long-term memory. Not metaphorically — a shell script drains that day's Claude Code conversation logs into an…
Your Automation Dies Quietly: A Weekly Revenue Gate That Caught One Line Dropping From 14 Files to 0
A layoff notice doesn't stop the Claude API invoice — that still lands next month, right on schedule. I run 14 content-production lines at the same…
Rate Limits Cost Me a Whole Night of Work — Here's the 46-Line Script That Fixed It
Every heavy Claude Code user eventually hits the wall: the 5-hour rate limit block. I'm Lily. I lost my income overnight to a company-initiated layo…
The 4,000-Token Tax: Auto-Disabling Claude Code Plugins You Haven't Touched in 30 Days
Hitting ¥1.2M/month taught me something I didn't expect: keeping the environment healthy has to come before doing the work. Why this system pays off…
My Cost Monitor Said $234 When the Real Bill Was $48. Then set -e Made It Go Silent for a Week.
A monitoring script that dies quietly is worse than no monitoring at all. Mine proved it twice: first it reported a 7-day spend of $234 when ccusage…
Tab completion, without writing a completion script
The first post derived a whole command line interface from a client class, and the second turned it into a command that runs from any directory. Bot…
A 4-Minute Freeze, a Dead PATH, and 3 More: 5 launchd Pitfalls From Mapping 26 Automation Jobs
Automation doesn't fail loudly. It accumulates until nobody — including the person who wrote it — can say which jobs are still alive. I started with…
How to Fix 'command not found' (Without Reinstalling Everything)
Adapted from the Command Line Essentials Companion Guide . You install something, open a fresh terminal, type the command, and get bash: python3: co…
Use a Free Model Endpoint as a Last-Minute Shell Gatekeeper
Why this is worth reading: you already paste model output into a terminal, and one bad command is all it takes to delete a directory, force-push ove…
Four Failures That Made a Weekly launchd Job Actually Run
Every skill my AI setup learns lives in one folder on my laptop — and none of it reaches the repo I created yesterday. That gap is why I built a wee…
A green test is not a running reflex, and a running one is not a placed one
We run about 283 scheduled jobs across a handful of machines. Each one is a shell script that declares its own schedule in a header comment, ships i…
Fixing Low USB-C Audio on Fedora Linux: My Battle with the Razer Leviathan
TL;DR: If you have a Razer Leviathan connected via USB-C on Linux and the volume is incredibly quiet even at 100%, PipeWire is likely crushing your…
Dead Auto-Skills Were Padding Every Conversation: A Weekly Curator That Flags at 30 Days and Archives at 90
"Claude Code gets smarter the more you use it" is only half the story. The other half is that it gets heavier. Six months ago I was a university stu…
Two Weeks of Silent Failure: Idempotent Scheduling and Self-Healing for a launchd + Claude Code Pipeline
Every morning at 5, launchd wakes up, and by the time I do, articles I never wrote are already live. In Part 1, I covered the basic design of a Clau…
Terminal Productivity Tips That Actually Save Time
Stop Typing the Same Commands If you spend more than a few minutes a day in the terminal, aliases are the lowest hanging fruit. Instead of typing gi…
A Month With Bash — Part 3: Building Projects
A Month With Bash — Part 3: Building Projects After all the expansions and syntax, I moved on to regex in bash. It wasn't too hard since I'd already…
A Month With Bash — Part 2: Expansions
A Month With Bash — Part 2: Expansions Continuing from where I left off, the next thing I learned was special parameters in bash: "$*" $# $? $@ $N $…
How to Let gzip Find the Signal in a Pile of Documents
Suppose you have a directory full of text documents. Most are repetitive, padded with boilerplate, or otherwise low-signal. A few contain the useful…