Tech Articles
Curated developer articles, tutorials, and guides – auto-updated hourly
Andrew Avery10h ago • 8 min read
My AI said the PDF was empty. The PDF was not empty.
I asked Claude Code to pull the key dates out of a PDF I had saved from a webpage. It came back...
#ai#python#debugging#claude
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Enjoy Kumawat6d ago • 4 min read
My MCP Tool's Empty-Payload Guard Checks Whether You Passed a Field. It Never Checked Whether the Field Would Actually Change Anything.
Back in early August I fixed a bug in update_article, one of the tools in this repo's DEV.to MCP...
#mcp#python#debugging#ai
3 2
Cleiton Augusto Correa Bezerra2d ago • 5 min read
Three gates that should have left one behind
I have been building a linter for quantum chemistry setups, nqf-lint. Some of it is easy. Some of it...
#rust#quantum#testing#debugging
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KahWee Teng7h ago • 5 min read
Thread Claims Interoperability. Your Network Has Three Meshes.
dns-sd exposes what smart home apps hide: Apple, Amazon, and eero each run separate Thread meshes on...
#smarthome#networking#matter#debugging
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John16h ago • 11 min read
The Ablation Had Four Arms. None Matched What Shipped.
An ablation script already had four arms before I touched it, and none of them matched the fix I act...
#debugging#software#softwareengineering
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Anand Rathnas23h ago • 5 min read
DigitalOcean Postgres Has a Firewall Trap. We Walked Right Into It.
Adding a single trusted-source rule to a previously-open DO managed Postgres flips the entire DB int...
#digitalocean#postgres#devops#debugging
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Jerome4d ago • 5 min read
Two Clocks, Neither Lying
The night of August 14th, Claude Code was planning me a trip. An eight-day itinerary — not code, jus...
#ai#claudecode#vscode#debugging
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Jerome4d ago • 7 min read
Coalescing the Stream
Claude Code, on my box, doesn't talk to a model provider directly. It goes through claude-code-route...
#ai#claudecode#node#debugging
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Hammad Shams Uddin5d ago • 5 min read
The file existed, so I assumed the check passed
A user sent me two clips and a screenshot. My video merge tool had run to 100%, said "Applying...
#javascript#ffmpeg#webdev#debugging
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Mukesh1d ago • 4 min read
The Green 'Done' That Lied: A War Story About Status Fields That Don't Mean What You Think
The symptom I run an autonomous pipeline that queues tasks, executes them, and writes a...
#ci#testing#debugging#programming
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Sharang Parnerkar1d ago • 3 min read
`node = "ubuntu"` matched two machines: a placement split-brain
A substring match in a node identity turned one pinned service into two - including two independent ...
#rust#devops#distributed#debugging
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Mahmoud Ibrahim — Confileo1d ago • 5 min read
The Arabic PDF bug was never in my code — it was the library version
I spent months writing bidi reconstruction logic for reversed Arabic text in PDF extraction. The act...
#pdf#python#i18n#debugging
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Rulestack2d ago • 7 min read
Your MCP server is configured but Claude can't see it: reading claude mcp list status
You ran claude mcp add, it printed Added ..., and Claude still acts like the server does not exist.....
#claudecode#mcp#debugging#devtools
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Hammad Shams Uddin8h ago • 5 min read
I made twenty tools take twenty files. Every bug was state that outlived one file.
My browser-based tools each took exactly one file. Converting twenty tracks meant twenty page loads,...
#javascript#webdev#ffmpeg#debugging
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Rulestack12h ago • 5 min read
When your MCP tool fails: errors, hangs, and empty results — what Claude Code actually does with each
Yesterday I posted a one-liner on Bluesky: an MCP tool that errors teaches the model something, one....
#mcp#claudecode#devtools#debugging
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Peter Li2d ago • 3 min read
Your WebSocket ping is answered by the edge, not your Durable Object
We run SSH traffic through a Cloudflare Durable Object. Each user's machine holds one outbound...
#cloudflare#websocket#serverless#debugging
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Sharang Parnerkar5d ago • 4 min read
The WebSocket session that was dead for 10 days - and my dashboard said 'healthy'
A half-open TCP connection, heartbeats that lied, and why I now define liveness as the channel you a...
#rust#debugging#distributed#devops
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David Bartalos5d ago • 10 min read
Nine of Thirteen Corrections Were Wrong: The Fix That Came With a Proof It Couldn't Work
Nine of the thirteen corrections our migration code had ever written in production were wrong. We...
#postgres#database#datamigration#debugging
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Marin T. Kael1d ago • 3 min read
Four green Mondays that wrote nothing: a uuid above the first step
The symptom For four Mondays in a row my data pipeline finished with complete, stages_ok:...
#cloudflare#serverless#debugging#javascript
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Jackson Ly4d ago • 3 min read
Test the second access path before you call a metric unreadable
I keep a list of surfaces whose numbers I could not read, with a short reason written next to each.....
#debugging#api#programming#webdev
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Jerome4d ago • 7 min read
The Twenty-Hour Fuse
Two nights of debugging, one incident left to write about. The night of August 14th, a Claude Code.....
#linux#sre#vscode#debugging
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Mito23h ago • 6 min read
Your Pi's 2 GB swap file isn't swap, and no swap command will tell you that
TL;DR: Raspberry Pi OS Trixie ships rpi-swap instead of dphys-swapfile, defaulting to a zram+file...
#raspberrypi#linux#sysadmin#debugging
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Ted44m ago • 6 min read
The Commit Was Named After the Wrong Half
I shipped a 4,600-line fix for 220 pages serving an empty shell to crawlers, and fixed a fifteen-lin...
#seo#webdev#debugging#database
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Enjoy Kumawat6d ago • 4 min read
My Commit Hook Has Ten Documented Fixes. Its Own Guard Clause May Have Kept It From Running on a Single One of My Real Commits.
I've fixed this repo's prepare-commit-msg hook a lot. Timeout on the diff call, argv-too-long on a.....
#git#python#debugging#ai
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