SEO & AI Engine Optimization Framework · May 2026

Project Boundaries: scope, change requests, out-of-scope handling

By — Founder & Lead Engineer, ThatDevPro (BA Computer Engineering, MA Cybersecurity) · Updated May 2026

A canonical reference for the seven major topic overlaps in the framework library. The library has 95+ framework files written over time by different authors and different model generations. Several…

Phase 5 Reconciliation: Which Framework Owns What When Topics Overlap

A canonical reference for the seven major topic overlaps in the framework library. The library has 95+ framework files written over time by different authors and different model generations. Several topics legitimately appear in multiple frameworks because they cross domains. This document codifies which file owns the canonical treatment of each overlapping topic and which files cross-reference it.

The reconciliation rule is: a topic has exactly one owner. Other files mention the topic only as a cross-reference to the owner, never as a standalone treatment. If a reader needs the full doctrine on a topic, the owner is the file they should land on.


Quick answer

This page is the Phase 5 Reconciliation: a canonical reference defining boundaries for the seven major topic overlaps across ThatDevPro's 95+ framework library. The rule is that a topic has exactly one owner; other files mention it only as a cross-reference to that owner, never as a duplicate standalone treatment. It is a routing layer pointing readers to the correct canonical file when topics overlap.

1. Page Experience vs Performance

Files involved: framework-pageexperience.md (26 KB), framework-performance.md (21 KB).

Overlap: Both files discuss Core Web Vitals, LCP, INP, CLS, image optimization, JavaScript discipline, font loading, third-party script management.

Ownership decision:

Cross-reference rule: When a framework discusses Core Web Vitals thresholds or measurement, link to framework-pageexperience.md. When it discusses how to actually achieve fast pages at the nginx and bundle level, link to framework-performance.md.


2. Digital PR vs Link Building

Files involved: framework-digitalpr.md (21 KB), framework-linkbuilding.md (60 KB).

Overlap: Both files cover earning links from journalists, the broken-link replacement methodology, the resource page outreach, the source request platforms (HARO replacement category: Featured, Qwoted, Connectively, SourceBottle, ResponseSource).

Ownership decision:

Cross-reference rule: framework-linkbuilding.md is the master link discipline reference; framework-digitalpr.md is the dedicated digital PR playbook for the subset of link work that flows through journalist relationships and story creation. Other frameworks link to whichever serves the specific use case.


3. E-E-A-T vs YMYL

Files involved: framework-eeat.md (118 KB), framework-ymyl.md (61 KB).

Overlap: Both discuss expert authorship, source citation, fact-checking, author bylines, editorial review processes, regulatory disclosure.

Ownership decision:

Cross-reference rule: E-E-A-T is the universal framework. YMYL is the classification overlay that triggers additional scrutiny. Every framework links to framework-eeat.md for quality fundamentals; YMYL-flagged content additionally links to framework-ymyl.md.


4. Content Quality Master

Files involved: framework-contentfirst.md (58 KB), framework-contentbriefs.md (59 KB), framework-contentrefresh.md (60 KB), framework-contentaudit.md (60 KB), framework-hcs.md (41 KB), framework-infogain.md (41 KB), framework-sqrg.md (40 KB), framework-eeat.md, framework-ymyl.md.

Overlap: All seven content-quality frameworks discuss what makes a page rank, what Google rewards, what AI engines extract.

Ownership decision (the seven discipline layers):

Cross-reference rule: For "what makes content rank" questions, the answer routes through HCS + InfoGain + SQRG + E-E-A-T + ContentFirst depending on which signal dominates. The brief-write-publish-refresh lifecycle routes through Briefs → ContentFirst writing principles → Audit (post-publish review) → Refresh (decay protection). The seven frameworks together compose the content discipline.


5. AI Citations vs Agentic AI Search

Files involved: framework-aicitations.md (45 KB), framework-agenticaisearch.md (23 KB), framework-aioverviews.md (51 KB), framework-searchgpt.md (60 KB), framework-perplexityspaces.md (60 KB), framework-multiengine-tradeoffs.md (107 KB).

Overlap: All six AI-surface frameworks discuss how AI engines extract content, what makes content citable, what makes a brand mentioned, the difference between organic ranking and AI citation.

Ownership decision:

Cross-reference rule: framework-aicitations.md is the umbrella. framework-aioverviews.md, framework-searchgpt.md, framework-perplexityspaces.md are the per-engine deep dives. framework-multiengine-tradeoffs.md is the cross-engine coordination layer. framework-agenticaisearch.md is the emerging agentic surface separate from the citation-style search surface.


6. Visual Search vs Multimodal Search

Files involved: framework-visualsearch.md (60 KB), framework-multimodalsearch.md (22 KB), framework-imageseo.md (57 KB).

Overlap: All three discuss image-based search, AI image understanding, ChatGPT and Gemini and Claude image upload capabilities, Google Lens and Pinterest Lens.

Ownership decision:

Cross-reference rule: framework-imageseo.md is the foundation. framework-visualsearch.md is the visual-search-engine deep dive. framework-multimodalsearch.md is the cross-modality combined experience. A query that involves a photo of a product routes through all three: imageseo (the image must be optimized), visualsearch (Google Lens must be able to identify it), multimodalsearch (the combined text + image query must return useful results).


7. Mobile vs UX

Files involved: framework-mobileseo.md (60 KB), framework-uxseo.md (20 KB), framework-accessibility.md (53 KB), framework-pageexperience.md (26 KB).

Overlap: All four discuss user experience signals, touch targets, mobile-first design, accessibility, Core Web Vitals.

Ownership decision:

Cross-reference rule: Mobile SEO is the device-specific framework. UX SEO is the behavior-and-IA framework. Accessibility is the WCAG and legal framework. Page Experience is the measurement framework. The four overlap at the touch target (mobile UX accessibility metric), the LCP (mobile page experience metric), and the form input (mobile accessibility UX metric). Where they overlap, the canonical owner takes precedence and the others cross-reference.


8. Companion Cross-Reference Map

Use this map when you need to know "which file should I link to" for a given topic:

Topic Canonical Owner
Core Web Vitals ranking framework-pageexperience.md
nginx/HTTP/bundle tuning framework-performance.md
Story creation for press framework-digitalpr.md
Link acquisition discipline framework-linkbuilding.md
Universal quality framework framework-eeat.md
YMYL classification framework-ymyl.md
Substrate doctrine framework-contentfirst.md
Helpful Content System framework-hcs.md
Information Gain patent framework-infogain.md
Sept 2025 SQRG update framework-sqrg.md
Brief architecture framework-contentbriefs.md
Decay model + refresh framework-contentrefresh.md
URL inventory + audit framework-contentaudit.md
Cross-engine AI patterns framework-aicitations.md
Agentic browsing AI framework-agenticaisearch.md
Google AI Overviews framework-aioverviews.md
ChatGPT / SearchGPT framework-searchgpt.md
Perplexity / Spaces framework-perplexityspaces.md
Cross-engine tradeoffs framework-multiengine-tradeoffs.md
Image foundation framework-imageseo.md
Visual search engines framework-visualsearch.md
Combined-modality search framework-multimodalsearch.md
Mobile-first device lens framework-mobileseo.md
Behavior + IA lens framework-uxseo.md
WCAG + legal framework-accessibility.md

End of Framework Document

This is the canonical Phase 5 reconciliation. It defines clear ownership for the seven major topic overlaps in the library. New framework files should respect these boundaries: a new file may discuss an overlapping topic only as a cross-reference to the canonical owner, not as a standalone treatment that duplicates content.

The reconciliation is not a content rewrite. The existing files remain authoritative for the topics they own. This document is the routing layer that points readers to the correct owner when topics overlap.

For the broader library overview see framework-masterindex.md. For the build log including all Phase 1 through Phase 7 entries see build-log.md.

Frequently asked questions

What is the reconciliation rule for overlapping SEO framework topics?

The rule is that a topic has exactly one owner. Other files mention the topic only as a cross-reference to the owner, never as a standalone treatment. If a reader needs the full doctrine on a topic, the owner is the file they should land on. The document is a routing layer, not a content rewrite; existing files remain authoritative for the topics they own.

Should I use Page Experience or Performance framework for Core Web Vitals?

framework-pageexperience.md owns Core Web Vitals as a ranking signal, the field-vs-lab data distinction, the CrUX dataset, GSC reporting, and mobile-vs-desktop thresholds. framework-performance.md owns the technical implementation of fast pages: HTTP/2 and HTTP/3, nginx tuning, gzip/Brotli compression, resource hints, critical CSS, and JavaScript code-splitting. Link to pageexperience for thresholds and measurement, performance for achieving fast pages at the nginx and bundle level.

What is the difference between the E-E-A-T and YMYL frameworks?

framework-eeat.md owns the universal Experience-Expertise-Authoritativeness-Trustworthiness quality framework that applies to every site regardless of industry, including the 'Trust is the most important' hierarchy. framework-ymyl.md owns the Your Money or Your Life classification overlay, the five YMYL classes, and the intensified scrutiny plus regulatory disclosure for verticals like finance, healthcare, and legal. Every framework links to E-E-A-T; YMYL-flagged content additionally links to YMYL.

Which framework owns AI citations versus per-engine optimization?

framework-aicitations.md is the umbrella, owning cross-engine patterns that work across ChatGPT, Perplexity, Gemini, Claude, and Copilot, plus the citation surface taxonomy. The per-engine deep dives are aioverviews (Google AI Overviews), searchgpt (SearchGPT/ChatGPT), and perplexityspaces (Perplexity). multiengine-tradeoffs is the cross-engine coordination layer, and agenticaisearch covers the emerging agentic browsing surface separate from citation-style search.

How should new framework files handle topics that overlap existing ones?

New framework files should respect these boundaries: a new file may discuss an overlapping topic only as a cross-reference to the canonical owner, not as a standalone treatment that duplicates content. The reconciliation is not a content rewrite—existing files remain authoritative for the topics they own. For overlaps among Mobile, UX, Accessibility, and Page Experience, the canonical owner takes precedence and the others cross-reference.

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