diff --git a/.codex/skills-index.json b/.codex/skills-index.json
index 4c73213..1c5183d 100644
--- a/.codex/skills-index.json
+++ b/.codex/skills-index.json
@@ -3,7 +3,7 @@
   "name": "claude-code-skills",
   "description": "Production-ready skill packages for AI agents - Marketing, Engineering, Product, C-Level, PM, and RA/QM",
   "repository": "https://github.com/alirezarezvani/claude-skills",
-  "total_skills": 194,
+  "total_skills": 195,
   "skills": [
     {
       "name": "contract-and-proposal-writer",
@@ -659,6 +659,12 @@
       "category": "engineering-advanced",
       "description": "Run hypothesis tests, analyze A/B experiment results, calculate sample sizes, and interpret statistical significance with effect sizes. Use when you need to validate whether observed differences are real, size an experiment correctly before launch, or interpret test results with confidence."
     },
+    {
+      "name": "tc-tracker",
+      "source": "../../engineering/tc-tracker",
+      "category": "engineering-advanced",
+      "description": "Use when the user asks to track technical changes, create change records, manage TC lifecycles, or hand off work between AI sessions. Covers init/create/update/status/resume/close/export workflows for structured code change documentation."
+    },
     {
       "name": "tech-debt-tracker",
       "source": "../../engineering/tech-debt-tracker",
@@ -1187,7 +1193,7 @@
       "description": "Software engineering and technical skills"
     },
     "engineering-advanced": {
-      "count": 43,
+      "count": 44,
       "source": "../../engineering",
       "description": "Advanced engineering skills - agents, RAG, MCP, CI/CD, databases, observability"
     },
diff --git a/.codex/skills/tc-tracker b/.codex/skills/tc-tracker
new file mode 120000
index 0000000..40830bb
--- /dev/null
+++ b/.codex/skills/tc-tracker
@@ -0,0 +1 @@
+../../engineering/tc-tracker
\ No newline at end of file