From 9319b9117ae80dcd102160206fb7fbca1d3db1ff Mon Sep 17 00:00:00 2001
From: bl-ue <54780737+bl-ue@users.noreply.github.com>
Date: Wed, 19 Nov 2025 10:38:09 -0700
Subject: [PATCH] 2.0.20

---
 README.md                                |  3 ++-
 system-prompts/tool-description-skill.md | 31 ++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 system-prompts/tool-description-skill.md

diff --git a/README.md b/README.md
index 3d3fafa..3385ad0 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Claude Code System Prompts
 
-This repository contains an up-to-date list of all Claude Code's various system prompts and their associated token counts as of **[Claude Code v2.0.19](https://www.npmjs.com/package/@anthropic-ai/claude-code/v/2.0.19) (October 15th, 2025).**
+This repository contains an up-to-date list of all Claude Code's various system prompts and their associated token counts as of **[Claude Code v2.0.20](https://www.npmjs.com/package/@anthropic-ai/claude-code/v/2.0.20) (October 16th, 2025).**
 
 Why multiple "system prompts?"
 
@@ -95,6 +95,7 @@ Text for large system reminders.
 - [Tool Description: Grep](./system-prompts/tool-description-grep.md) (**300** tks) - Tool description for content search using ripgrep.
 - [Tool Description: NotebookEdit](./system-prompts/tool-description-notebookedit.md) (**121** tks) - Tool description for editing Jupyter notebook cells.
 - [Tool Description: ReadFile](./system-prompts/tool-description-readfile.md) (**439** tks) - Tool description for reading files.
+- [Tool Description: Skill](./system-prompts/tool-description-skill.md) (**270** tks) - Tool description for executing skills in the main conversation.
 - [Tool Description: SlashCommand](./system-prompts/tool-description-slashcommand.md) (**381** tks) - Tool description for executing slash commands.
 - [Tool Description: Task](./system-prompts/tool-description-task.md) (**1140** tks) - Tool description for launching specialized sub-agents to handle complex tasks.
 - [Tool Description: TodoWrite](./system-prompts/tool-description-todowrite.md) (**2167** tks) - Tool description for creating and managing task lists.
diff --git a/system-prompts/tool-description-skill.md b/system-prompts/tool-description-skill.md
new file mode 100644
index 0000000..79ecfdc
--- /dev/null
+++ b/system-prompts/tool-description-skill.md
@@ -0,0 +1,31 @@
+<!--
+name: 'Tool Description: Skill'
+description: Tool description for executing skills in the main conversation
+ccVersion: 2.0.20
+variables:
+  - AVAILBLE_SKILLS_1
+  - AVAILBLE_SKILLS_2
+-->
+Execute a skill within the main conversation
+
+<skills_instructions>
+When users ask you to perform tasks, check if any of the available skills below can help complete the task more effectively. Skills provide specialized capabilities and domain knowledge.
+
+How to use skills:
+- Invoke skills using this tool with the skill name only (no arguments)
+- When you invoke a skill, you will see <command-message>The "{name}" skill is loading</command-message>
+- The skill's prompt will expand and provide detailed instructions on how to complete the task
+- Examples:
+  - \`command: "pdf"\` - invoke the pdf skill
+  - \`command: "xlsx"\` - invoke the xlsx skill
+  - \`command: "ms-office-suite:pdf"\` - invoke using fully qualified name
+
+Important:
+- Only use skills listed in <available_skills> below
+- Do not invoke a skill that is already running
+- Do not use this tool for built-in CLI commands (like /help, /clear, etc.)
+</skills_instructions>
+
+<available_skills>
+${AVAILBLE_SKILLS_1}${AVAILBLE_SKILLS_2}
+</available_skills>