Why we made the decisions we made. The bugs that forced rewrites, the experiments that shaped the defaults, and the parts of the codebase we're most willing to defend.
The Veloxar Companion extension sends links straight from Safari or Chrome to the desktop app over a local bridge. Why we picked a localhost loop over cloud sync, and what the handshake looks like.
Most download managers maintain a domain list and break when a site changes. We wrote 8 plugins that detect the underlying CMS technology instead. 900+ sites, no list to maintain.
A flaky host returning 503s is a problem. 50 downloads slamming it back in lockstep every 2 seconds is a worse problem. The four jitter strategies we ship and why decorrelated usually wins.
Every other download manager says it skips CAPTCHAs and countdown timers. We don't, because you can't. Cloudflare cookies, rate limits, and being honest about where the wins actually are.
Widevine and FairPlay streams aren't downloadable, and pretending otherwise wastes your time. We detect them before the first segment fetch and fail clearly in under a second.
Your Wi-Fi drops at 2.1 GB of a 3 GB download. We built the manager that resumes from the exact byte it left off, on the right chunk, with host memory across sessions.
HLS and DASH look complicated: manifests, hundreds of segments, adaptive bitrates, AES-128 keys. They're actually the most downloadable format around, once you treat them like a list.
Multi-part RAR, 7z parts, HJSplit, Unix split. The archive-naming zoo is worse than you remember, and the app that reassembles it for you has to know about all of it.
We used to have two code paths for adding URLs -- one for the clipboard watcher, one for everywhere else. They drifted. Here's the duplicate-row bug that forced the refactor.