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Articles 136,627Blog Posts 140,789Tech Tutorials 35,437Research Papers 26,949News 19,220
⚡ AI Lessons
Dev.to · Deva
6d ago
Streaming Article Queue Progress Over SSE
The article queue showed one opaque Generating spinner while three separate drafts were being...
Dev.to · Deva
🔐 Cybersecurity
⚡ AI Lesson
3w ago
Bumping your CDP timeout won't save you
The obvious fix when headless Chrome times out on bring up is to increase the deadline. Triple it,...
Dev.to · Deva
3w ago
Prompt Caching in Practice: The 5-Minute Cache and Workflow Design
A deep-dive explainer on Prompt Caching in Practice: The 5-Minute Cache and Workflow Design: methodology, historical context, worked examples with
Dev.to · Deva
3w ago
Comments are not posts. My dashboard learned that the hard way.
48 tests. That is the ticket to ship: comment db (9), generator (5), routes (12), plus the existing...
Dev.to · Deva
🔧 Backend Engineering
⚡ AI Lesson
3w ago
StaticFiles html=True at / will silently eat every API route you have
Zero API routes reachable. That was the state of my dashboard the moment the static directory...
Dev.to · Deva
⚡ AI Lesson
3w ago
Adding a Live Generate Button: Why Synchronous Beat a Job Queue
The dashboard could display drafts. It could not create them. You watched the queue and waited for a...
Dev.to · Deva
⚡ AI Lesson
4w ago
I Broke My SPA Fallback by Renaming a FastAPI Parameter to Satisfy a Linter
The dashboard SPA fallback was returning 422 on every route that was not an API route. FastAPI kept...
Dev.to · Deva
📣 Digital Marketing & Growth
⚡ AI Lesson
4w ago
Building Editorial Control Into a 3 Platform Content Engine
3 platforms, one queue, zero editorial control. That was the state of my content automation before I...
Dev.to · Deva
⚡ AI Lesson
1mo ago
My test had a comment that said 'in memory fallback'. It wasn't.
The test test_warmup_eval_no_flag_subprocess_exits_0 was running the real warmup eval command, no ,...
Dev.to · Deva
🔧 Backend Engineering
⚡ AI Lesson
1mo ago
The warmup engine that worked perfectly and did nothing
The bug that broke my warmup engine was not a missing save call. That is the obvious culprit when...
Dev.to · Deva
1mo ago
Your subprocess test is running against production state
The comment in the test said "in memory fallback." That was wrong. The test was running the real...
Dev.to · Deva
🧠 Large Language Models
⚡ AI Lesson
1mo ago
Your AI reply engine doesn't need a humor classifier
The fix for a tone deaf AI reply engine is not humor detection. It is better epistemic posture inside...
Dev.to · Deva
1mo ago
43 Tests for a Write Warmup State Machine
43 tests. That is what it took to be confident in a state machine that decides whether a posting...
Dev.to · Deva
1mo ago
12 Posts a Week to 7: Fixing My LinkedIn Distribution Problem
12 posts per week. That was my LinkedIn cadence, and it was quietly killing my reach. Not because...
Dev.to · Deva
⚡ AI Lesson
1mo ago
Three Test Levels for One CLI Subcommand
7 out of 7 tests pass. That number is boring and exactly correct. Adding a CLI subcommand sounds...
Dev.to · Deva
⚡ AI Lesson
1mo ago
614 tests passing, one new rule: attack the argument, never the person
614 tests green, no regressions. That is what the guardrail cost in test churn: zero. The problem...
Dev.to · Deva
⚡ AI Lesson
1mo ago
Your feature flag defaults are backwards in tests
Most test suites get feature flag isolation backwards. The instinct is to opt in to a feature when a...
Dev.to · Deva
🔧 Backend Engineering
⚡ AI Lesson
1mo ago
Phase 0 means zero writes. Make sure your code agrees.
The phase spec said "Curve A." The code had _DEFAULT_PHASES. They were not the same thing. That gap...
Dev.to · Deva
1mo ago
226 Is Not 344: Why pause_writes Needed a Code Field
226. That is the HTTP status code that stamps a 14 day penalty on write volume. Before P4,...
Dev.to · Deva
💻 AI-Assisted Coding
⚡ AI Lesson
1mo ago
Every post my engine wrote hit 200 characters. Here is the fix.
200 characters. That was the fixed soft target every post my engine generated aimed for. Replies had...
Dev.to · Deva
📣 Digital Marketing & Growth
⚡ AI Lesson
1mo ago
160 Fediverse instances, 28 made it through as brand safe
160 addressable Fediverse instances, 28 made it through as brand safe. The initial harvest pool only...
Dev.to · Deva
🔐 Cybersecurity
⚡ AI Lesson
1mo ago
Autonomous Mastodon Onboarding Hits the hCaptcha Wall
App OAuth bypasses the signup captcha but not the email confirmation interstitial. That one sentence...
Dev.to · Deva
📣 Digital Marketing & Growth
⚡ AI Lesson
1mo ago
Why does a post with 400 impressions get zero replies?
Why does a post with 400 impressions get zero replies? I ran an audit on the last 8 LinkedIn posts...
Dev.to · Deva
🧠 Large Language Models
⚡ AI Lesson
1mo ago
LLM agents in quantitative finance, where they actually pay off
A working note on where coding agents earn their keep in equity research, forensic accounting, and DCF construction, and where they still do not.
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