diff --git a/TIGERSKILLS.md b/TIGERSKILLS.md
index 2daa790..c29292b 100644
--- a/TIGERSKILLS.md
+++ b/TIGERSKILLS.md
@@ -69,7 +69,9 @@ curator's blessing.
 - **Search the supported repos** — each *supported* well-known repo gets a **`Tiger_Skill_Source`** adapter
   that knows THAT repo's layout, scans it, and normalizes its skills into one list. **`Tiger_Skill_Index`**
   runs the adapters, caches each independently (last-good on outage — the `Tiger_Module_Registry` pattern),
-  then merges + de-dupes + searches. Two built-in supported sources ship:
+  then merges + de-dupes + searches. Three built-in supported sources ship:
+  - **`WebTigers/Skills`** — WebTigers' own **first-party** skills for building on Tiger (module, web
+    service, admin screen, design), via **`Tiger_Skill_Source_Marketplace`** (§2a). The reference pack.
   - **`anthropics/skills`** — the official collection, via **`Tiger_Skill_Source_SkillsDir`** (the raw
     `skills/<name>/SKILL.md` layout: one git-trees call + a raw fetch per `SKILL.md`). Right for an
     official-sized repo (~17 skills).
@@ -112,9 +114,10 @@ owner.**
 
 > **BUILT (Phase 1):** `Tiger_Skill_Source` (+ `parseFrontmatter`, spec-correct: name + description, block
 > scalars), `Tiger_Skill_Source_SkillsDir`, `Tiger_Skill_Source_Marketplace` (the `.claude-plugin/marketplace.json`
-> reader, §2a), `Tiger_Skill_Source_Url`, `Tiger_Skill_Index` (scan / cache / merge / search). Two built-in
-> sources: `anthropics/skills` (17, SkillsDir) + `ComposioHQ/awesome-claude-skills` (107, Marketplace).
-> Install + the active-set (§3) + the admin surface (§6) shipped in increment 2.
+> reader, §2a), `Tiger_Skill_Source_Url`, `Tiger_Skill_Index` (scan / cache / merge / search). Three built-in
+> sources: `WebTigers/Skills` (first-party, Marketplace) + `anthropics/skills` (17, SkillsDir) +
+> `ComposioHQ/awesome-claude-skills` (107, Marketplace). Install + the active-set (§3) + the admin surface
+> (§6) shipped in increment 2.
 
 ---
 
diff --git a/library/Tiger/Skill/Index.php b/library/Tiger/Skill/Index.php
index 167cf95..e100dec 100644
--- a/library/Tiger/Skill/Index.php
+++ b/library/Tiger/Skill/Index.php
@@ -43,6 +43,8 @@ public static function clearSources()
     public static function sources()
     {
         $out = [];
+        // Built-in: WebTigers' own first-party skills for building on Tiger (via its .claude-plugin/marketplace.json).
+        $out['webtigers-skills'] = new Tiger_Skill_Source_Marketplace('webtigers-skills', 'WebTigers Skills', 'WebTigers/Skills', 'main', '.claude-plugin/marketplace.json', '');
         // Built-in: the official Anthropic Agent Skills collection (skills/*/SKILL.md).
         $out['anthropic-skills'] = new Tiger_Skill_Source_SkillsDir('anthropic-skills', 'Anthropic Skills', 'anthropics/skills', 'main', 'skills');
         // Built-in: the Composio community collection — 100+ skills via its .claude-plugin/marketplace.json
diff --git a/tests/Unit/Skill/SkillIndexTest.php b/tests/Unit/Skill/SkillIndexTest.php
index 76148de..5fc9136 100644
--- a/tests/Unit/Skill/SkillIndexTest.php
+++ b/tests/Unit/Skill/SkillIndexTest.php
@@ -26,7 +26,7 @@
 final class SkillIndexTest extends UnitTestCase
 {
     /** Every built-in source id — each gets a FRESH empty cache so no test touches the network. */
-    private const BUILTIN_SOURCES = ['anthropic-skills', 'composio-skills'];
+    private const BUILTIN_SOURCES = ['webtigers-skills', 'anthropic-skills', 'composio-skills'];
 
     private array $builtinCaches = [];
 
@@ -127,6 +127,7 @@ public function index_merges_a_source_and_searches_it(): void
     public function built_in_sources_are_registered(): void
     {
         $sources = Tiger_Skill_Index::sources();
+        $this->assertArrayHasKey('webtigers-skills', $sources, 'the first-party WebTigers collection ships as a supported source');
         $this->assertArrayHasKey('anthropic-skills', $sources, 'the official collection ships as a supported source');
         $this->assertArrayHasKey('composio-skills', $sources, 'the Composio community collection ships as a supported source');
     }