fix(agents): validate visible HTML and image source sets

docs/development/agent-workflow.md

@@ -53,7 +53,11 @@ as Markdown links, including decoded attributes and fragment validation.
 Image references check file existence without interpreting image fragments as
 Markdown headings; document links keep anchor checks even when sharing a target.
 Inline guidance imports are rejected after punctuation as well as whitespace.
-The Nx test hash includes `marked`, `parse5` and `github-slugger` so dependency changes invalidate parser coverage.
+The import scan includes visible HTML text and excludes code and non-rendered containers.
+Image source sets use `parse-srcset` to check each candidate URL. Root-relative
+literals never suppress source-relative definition checks.
+The Nx test hash includes `marked`, `parse5`, `github-slugger` and `parse-srcset`
+so dependency changes invalidate parser coverage.
 It cannot prove semantic equivalence; review changed contracts as well.
 
 ## Protected Markdown edits