Every content team I've ever worked with has a document called something like 'content ideas,' and every one of those documents is a lie. Ours contained a chaotic blend of things the CEO read on a flight and wanted us to write about, things marketing 'felt' might rank, and a handful of keyword scraps from a research session six months stale. It was not a strategy. It was a parking lot with a fancy name. We'd been pulling articles from it semi-randomly and then acting surprised when half of them went nowhere.
The deeper problem was that we had no idea where our coverage was actually thin relative to the people beating us. We knew our competitors out-ranked us on a bunch of terms, but 'they're winning' is not a content plan. I needed to know specifically which topics they'd built authority on that we'd never touched, and in what order to attack them.
The comparison that built our entire Q3
I ran the Topical Authority Gap Finder — Discover What Competitors Cover That You Don't prompt against our two main rivals: one big incumbent who'd been publishing for five years, and a scrappy newer site that had grown fast over eighteen months. I pasted in about 80 of our own article titles and pulled the competitors' topic lists off their sitemaps and content-hub pages. Claude Sonnet 4.6 mapped six major topic pillars the incumbent covered comprehensively, and flagged that we had MISSING coverage on four of them. Four entire pillars. That gap list was forty articles wide.
I used Claude Sonnet 4.6 for this on purpose. Gap analysis is a reasoning task with a lot of judgment — distinguishing a genuine authority gap from a topic our competitor just happens to mention once, weighting everything against our stated content goal. The XML tags in the body keep it from rambling, and the explicit instruction to reorder priorities based on the content goal meant the output wasn't a generic list — it was a list ranked for us specifically.
What we did with the output
- The Part 4 90-day plan became our literal editorial calendar for the quarter, in order
- Part 3 (our advantages) revealed we had stronger implementation guides than either competitor — so we built a hub page to consolidate and defend that authority
- The difficulty signals stopped us chasing the highest-volume gaps first; we took Medium-difficulty topics we could actually win
- We commissioned 12 articles in month one straight off the top-priority gaps
Three months later, 8 of those 12 were ranking in positions 4 through 12 for their target keywords. That's not a fluke rate — it's what happens when you write articles aimed at validated gaps instead of articles aimed at whatever was top of the parking lot that week. The four that didn't land taught me something too: three of them were High-difficulty gaps where the incumbent had five years of entrenched coverage, exactly the ones the prompt had flagged as hard. So even the 'failures' were predicted by the difficulty signal, which made me trust the next run even more.
The content-goal input is the whole trick
Here's what I'd underline for anyone running this: the content_goal input is not a formality, it's the lever. The first time I ran it I set the goal to 'build broad topical authority,' and I got a wide, even list. Then I changed the goal to 'rank for bottom-of-funnel commercial keywords' and re-ran it on the exact same inputs. The list completely reordered — suddenly the comparison and 'best X for Y' gaps shot to the top and the informational fluff sank. Same data, different strategy, different plan. Without a sharp goal, you just get a long undifferentiated list of things competitors do. With one, you get a ranked action plan that knows what you're trying to achieve.
There's a third use I stumbled into that's worth mentioning: Part 3, our advantages, is quietly the most under-appreciated section. Everyone runs a gap analysis to find what they're missing, but the prompt also tells you where you're already ahead — topics you cover that the competitor doesn't. That's not a to-write list, it's a to-defend list. We found we had genuinely stronger implementation guides than either rival, so instead of writing more of them, we built a hub page consolidating the existing ones and pointed our strongest internal links at it. Defending an advantage you already have is often cheaper and higher-return than chasing a gap, and most teams never even look at it because they're too busy fixating on what they lack.
One honest caveat: the analysis is only as good as the competitor input. If you paste a thin or lopsided topic list, the prompt will tell you the confidence is limited rather than confidently hallucinating gaps — which I appreciate, but it does mean the prep work of pulling a real competitor topic list matters. I spend ten minutes scraping a competitor's sitemap and hub pages before I run it, and that ten minutes is the difference between a sharp analysis and a vague one. Once I have the gap list, I feed the winners into my Keyword Cluster Builder — Group Seed Keywords Into Topical Themes prompt to structure them before briefing. Grab the Topical Authority Gap Finder — Discover What Competitors Cover That You Don't prompt on Prompt Dock, run it against your toughest competitor, and watch your parking lot become a calendar.