Add Snowflake Skills License and update licensing in README and skill frontmatter

Author: iamontheinet

LICENSE.md

@@ -0,0 +1,22 @@
+# Snowflake Skills License
+
+© 2026 Snowflake Inc. All rights reserved.
+
+**LICENSE:** Use of these materials (including all code, prompts, assets, files, and other components of these skills (collectively, "Skills")) is governed by your agreement with Snowflake for the Service. If no separate agreement exists, use is governed by Snowflake's [Terms of Service](https://www.snowflake.com/en/legal/terms-of-service/).
+
+Your applicable agreement is referred to as the "Agreement." "Service" is as defined in the Agreement.
+
+**ADDITIONAL RESTRICTIONS:** Notwithstanding anything in the Agreement to the contrary, you may not:
+
+- Extract from the Service or retain copies of the Skills outside use with the Service;
+- Reproduce or copy the Skills, except for temporary copies created automatically during authorized use of the Service;
+- Create derivative works based on the Skills;
+- Distribute, sublicense, or transfer the Skills to any third party;
+- Make, offer to sell, sell, or import any inventions embodied in the Skills; nor,
+- Reverse engineer, decompile, or disassemble the Skills.
+
+The receipt, viewing, or possession of the Skills does not convey or imply any license or right beyond those expressly granted above.
+
+Snowflake retains all rights, title, and interest in the Skills, including all copyrights, trademarks, patents, and all other applicable intellectual property rights.
+
+THE SKILLS ARE PROVIDED "AS IS," WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SKILLS OR THE USE OR OTHER DEALINGS IN THE SKILLS.

README.md

@@ -162,4 +162,8 @@ To update later: `claude plugin update cortex-code`
 
 ## License
 
-Apache 2.0 — see [LICENSE](LICENSE).
+Copyright (c) Snowflake Inc. All rights reserved.
+
+The skills in this project are licensed under the [Snowflake Skills License](LICENSE.md).
+
+All other content is licensed under the [Apache 2.0 license](LICENSE).

plugins/cortex-code/skills/cortex-router/SKILL.md

@@ -1,6 +1,7 @@
 ---
 name: cortex-router
 description: Auto-routing skill loaded by the prompt filter hook. Routes Snowflake-related operations to Cortex Code CLI. Not for direct invocation — use $cortex-run instead.
+license: Proprietary. See LICENSE.md for complete terms
 user-invocable: false
 metadata:
   author: Snowflake Integration Team

plugins/cortex-code/skills/cortex-run/SKILL.md

@@ -1,6 +1,7 @@
 ---
 name: cortex-run
 description: ONLY load this skill when the user explicitly types $cortex-run or /cortex-run. NEVER load this skill from auto-routing hooks or keyword matching. For auto-routed prompts, use cortex-code:cortex-router instead.
+license: Proprietary. See LICENSE.md for complete terms
 user-invocable: true
 metadata:
   author: Snowflake

plugins/cortex-code/skills/cortex-setup/SKILL.md

@@ -1,6 +1,7 @@
 ---
 name: cortex-setup
 description: Install Snowflake CLI and Cortex Code CLI. Use when cortex is not installed, when the user asks to set up Cortex Code, or when routing fails because the CLI is missing. Triggers: setup cortex, install cortex, cortex not found, CLI not installed, set up snowflake.
+license: Proprietary. See LICENSE.md for complete terms
 ---
 
 # Cortex Code Setup