diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index e595b5d..7c55b0a 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -13,12 +13,12 @@
             "state": {
               "type": "markdown",
               "state": {
-                "file": "tools/_INDEX.md",
-                "mode": "source",
+                "file": "README.md",
+                "mode": "preview",
                 "source": false
               },
               "icon": "lucide-file",
-              "title": "_INDEX"
+              "title": "README"
             }
           }
         ]
@@ -94,7 +94,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "tools/_INDEX.md",
+                "file": "README.md",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -104,7 +104,7 @@
                 "unlinkedCollapsed": true
               },
               "icon": "links-coming-in",
-              "title": "Backlinks for _INDEX"
+              "title": "Backlinks for README"
             }
           },
           {
@@ -113,12 +113,12 @@
             "state": {
               "type": "outgoing-link",
               "state": {
-                "file": "tools/_INDEX.md",
+                "file": "README.md",
                 "linksCollapsed": false,
                 "unlinkedCollapsed": true
               },
               "icon": "links-going-out",
-              "title": "Outgoing links from _INDEX"
+              "title": "Outgoing links from README"
             }
           },
           {
@@ -156,13 +156,13 @@
             "state": {
               "type": "outline",
               "state": {
-                "file": "tools/_INDEX.md",
+                "file": "README.md",
                 "followCursor": false,
                 "showSearch": false,
                 "searchQuery": ""
               },
               "icon": "lucide-list",
-              "title": "Outline of _INDEX"
+              "title": "Outline of README"
             }
           },
           {
@@ -196,8 +196,8 @@
   },
   "active": "9b2e89c682f5d2ef",
   "lastOpenFiles": [
-    "documentation/INDEX.md",
     "tools/_INDEX.md",
+    "documentation/INDEX.md",
     "tools/security/pentest-recon-enum/Packet Capture & Analysis.md",
     "tools/security/pentest-recon-enum/Recon & Threat Reputation.md",
     "tools/security/pentest-recon-enum/Port Scanners & Network Discovery.md",
diff --git a/README.md b/README.md
index 85356f6..f226965 100644
--- a/README.md
+++ b/README.md
@@ -19,41 +19,25 @@ When ready: Plan to squash-merge or rebase + clean history into main.
 
 This is a living knowledge base of tools, techniques, one-liners, cheatsheets, and references — focused on security, networking, sysadmin, and devops. (LAST UPDATED 2026-03-07)
 
+## Repository Structure & Quick Navigation
+
 ```text
 the-book-of-secret-knowledge/
-├── .github/                    # Workflows, issue templates, etc.
-├── .obsidian/                  # Optional Obsidian vault config (personal notes)
-├── documentation/              # Guides, how-tos, one-liners, cheat sheets
-│   ├── learning-resources/     # Daily knowledge, news, articles
-│   │   └── daily-knowledge-news.md
-│   ├── manuals-howtos-guides/  # Shell tricks, functions, practical guides
-│   │   ├── shell-one-liners.md
-│   │   └── shell-tricks-functions.md
-│   ├── other-cheat-sheets.md
-│   └── readme - to refactor.md   # (legacy — planned migration)
-├── tools/                      # Curated tool lists (following TOOL-TABLE-SCHEMA.md)
-│   ├── 00_index.md             # → planned rename to INDEX.md
-│   ├── my-contributions.md     # Personally added / heavily used tools
+├── documentation/              # Guides, one-liners, cheat sheets, learning material
+│   ├── [INDEX.md](./documentation/INDEX.md)                 ← category overview
+│   ├── learning-resources/
+│   ├── manuals-howtos-guides/
+│   └── other-cheat-sheets.md
+├── tools/                      # Main curated tool collections
+│   ├── [_INDEX.md](./tools/_INDEX.md)                       ← tools overview (rename suggestion: INDEX.md)
+│   ├── my-contributions.md
 │   ├── system-services.md
-│   ├── network-engineering/    # Diagnostics, DNS/IPAM, routing/BGP/OSPF
-│   │   ├── diagnostics-troubleshooting/   # Bandwidth tests, tracing, protocols
-│   │   ├── dns-dhc-ipam/
-│   │   └── routing-bgp-ospf/
-│   ├── security/               # Pentest, recon/enum, SSL/TLS, vuln/exploit
-│   │   ├── pentest-recon-enum/            # Packet capture, scanners, OSINT
-│   │   ├── ssl-tls-web-security.md
-│   │   └── vuln-analysis-exploitation/    # Packet crafting, exploit DBs
-│   └── sysadmin-devops/        # Remote access, monitoring, shell/terminal tools
-│       ├── https-web-services/            # Benchmark, browsers, inspectors
-│       ├── system-monitoring-tracing/
-│       └── terminal-shell-productivity/   # Shells, editors, file utils
-├── .gitignore
-├── .markdownlint.json
-├── .markdownlintignore
-├── Contributing.md
-├── LICENSE.md
-├── README.md                   # ← You are here
-└── TOOL-TABLE-SCHEMA.md        # Standard format for all tool-list .md files
+│   ├── network-engineering/    # Diagnostics, DNS, routing
+│   ├── security/               # Pentest, recon, TLS, exploits
+│   └── sysadmin-devops/        # SSH, monitoring, shell productivity
+├── [TOOL-TABLE-SCHEMA.md](./TOOL-TABLE-SCHEMA.md)    # ← mandatory format for all tool tables
+├── [Contributing.md](./Contributing.md)
+└── [LICENSE.md](./LICENSE.md)
 ```
 
 ##### :black_small_square: SSL