Treating Dev.to and Reddit as search channels means writing posts that answer the exact questions people type into Google, not just sharing updates. This post explains the playbook: pick a search-intent topic, answer it in the first two sentences, and link to a deeper guide.
I went back through every post my own pipeline has sent out and ran the same structural check across all of it. Word count, title length, question versus statement, tag choice, none of it held up outside a post or two here and there. One thing did. Whether the post carried an image next to the text came out at r = 0.220 on Dev.to and r = 0.164 on Reddit. Everything else in the check was noise by comparison.
That's not a fluke sitting inside one lucky tag. It replicated in 5 of 5 tags I checked on Dev.to and in 6 of 6 subreddits on Reddit. Different moderators, different feed logic, different norms for what counts as a good post, and the same signal shows up anyway.
Where the line actually sits
So the boundary isn't Dev.to on one side and Reddit on the other. It's whoever is reading the post. A reader on Dev.to and a reader on Reddit behave the same way in front of an image, and that behavior doesn't care which platform delivered it. Two platforms, one audience response.
That's the part I got backwards for a while. I kept building separate rules per platform when the thing that actually predicted engagement crossed both of them cleanly.
What I changed
I changed what my pipeline attaches before a post ships. Every post now carries one image or one chart, not because it reads as more polished, but because it's the only structural feature in the whole check that reached strong confidence anywhere. Title length didn't clear that bar. Question titles didn't either.
The cost on my end was small, one image built alongside the draft instead of tacked on after, but skipping it had been quietly costing engagement on every platform I measured, not just one of them.
The chart sitting next to this post is that same measurement, r = 0.220 and r = 0.164 side by side, from the same check that made me stop splitting my rules by platform and start splitting them by audience instead.
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