diff --git a/WIKI.md b/WIKI.md
index 5e2a106..563a730 100644
--- a/WIKI.md
+++ b/WIKI.md
@@ -55,7 +55,10 @@ docs/wiki/
 - Top-level pages use `NN_name.md` directly. High-volume sections get their own
   directory, e.g. `03_use_cases/NN_name.md` (nav group "Use Cases").
 - **No frontmatter.** Every file opens directly with an H1 `# Title`.
-- Navigation labels are derived from the page title, not the filename.
+- Navigation labels are short human titles set explicitly in
+  `docs/mkdocs.wiki.yml` (title case) — often **shorter** than the page H1.
+  Example: nav label `Basic CRUD` vs page H1 `Use Case 1: Basic FastAPI CRUD API`.
+  Never use the raw filename slug as the label.
 - Renumbering: prefixes order pages. When inserting a page, pick the next
   number in the relevant group (subgroup numbers stay grouped).
 
@@ -64,7 +67,7 @@ docs/wiki/
 ## 3. Navigation — `docs/mkdocs.wiki.yml` is the source of truth
 
 Every wiki page **must** be wired into the nav defined in
-`docs/wiki/../mkdocs.wiki.yml`. If a page is not in the nav, it is orphaned.
+`docs/mkdocs.wiki.yml`. If a page is not in the nav, it is orphaned.
 
 - The `nav:` block mirrors the directory tree; directories become nested
   groups.
@@ -103,16 +106,20 @@ Every wiki page **must** be wired into the nav defined in
 
 - Opens with `# Library Overview`, one sentence about what the library does,
   then a line stating the page builds the mental model.
-- Sections: `## Architecture` (ASCII diagram + numbered layer list),
-  `## Lifecycle Rules` (table: step / call / why),
-  `## Which … Should You Use?` (decision table).
-- Ends with `## Read Next` (cross-links to the next pages to read).
+- Sections: `## 🏗️ Architecture` (ASCII diagram + numbered layer list),
+  `## 🔄 Lifecycle Rules` (table: step / call / why),
+  `## 🧭 Which … Should You Use?` (decision table).
+- Ends with `## ➡️ Read Next` (cross-links to the next pages to read).
 
 ### 4.3 Components page (`02_*`)
 
 - Validated reference for the public API surface — describes what each
   component is for and how the pieces wire together. Keep it usage-level;
   exact signatures belong in `docs/lib/`.
+- Anatomy: numbered sections, one per component (`## 1. MongoConnectionManager`,
+  `## 2. BaseDocument`, …), with `### 8.1`-style sub-numbering for related
+  types under a component (e.g. the cache layer's backend / stats / config /
+  in-memory / redis implementations). Ends with `## Related`.
 
 ### 4.4 Use-case page (the most common)
 
@@ -152,8 +159,11 @@ depth-first sections and comparison tables:
 
 ### 4.7 Error Handling (`06_*`) / Testing pages
 
-- Scenario-style: explain the failure modes / test approaches, a focused code
-  block, `## Notes` tip list, `## Related`.
+- **Error Handling:** an exceptions table (`Exception | Source | Meaning / fix`),
+  a `> ` note on which failures are by design, a `## 🚀 FastAPI Mapping Example`
+  code block, then `## 💡 Tips` bullets, then `## Related`.
+- **Testing example (`07_*`):** `## 🚀 Mock-Based Quickstart` (focused code
+  block), `## 💡 Notes` tip list, `## Related`.
 
 Common to all pages: no frontmatter, `---` between every major section, and a
 `## Related` (or variant) footer as the **last** section.
@@ -182,8 +192,8 @@ Examples (from mongo-ops):
 
 Variants:
 
-- `## Read Next` — used on the overview page (linear reading order).
-- `## Related Resources` — only on `index.md`, one bullet per external resource.
+- `## ➡️ Read Next` — used on the overview page (linear reading order).
+- `## 🔗 Related Resources` — only on `index.md`, one bullet per external resource.
 
 ---