diff --git a/README.md b/README.md
index 3f338db..52999bd 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ Download it and try it out for free!  **https://piebald.ai/**
 > [!important]
 > **NEW (January 23, 2026): We've added all of Claude Code's ~40 system reminders to this list—see [System Reminders](#system-reminders).**
 
-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 v2.1.38](https://www.npmjs.com/package/@anthropic-ai/claude-code/v/2.1.38) (February 9th, 2026).**  It also contains a [**CHANGELOG.md**](./CHANGELOG.md) for the system prompts across 94 versions since v2.0.14.  From the team behind [<img src="https://github.com/Piebald-AI/piebald/raw/main/assets/logo.svg" width="15"> **Piebald.**](https://piebald.ai/)
+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 v2.1.39](https://www.npmjs.com/package/@anthropic-ai/claude-code/v/2.1.39) (February 10th, 2026).**  It also contains a [**CHANGELOG.md**](./CHANGELOG.md) for the system prompts across 95 versions since v2.0.14.  From the team behind [<img src="https://github.com/Piebald-AI/piebald/raw/main/assets/logo.svg" width="15"> **Piebald.**](https://piebald.ai/)
 
 **This repository is updated within minutes of each Claude Code release.  See the [changelog](./CHANGELOG.md), and follow [@PiebaldAI](https://x.com/PiebaldAI) on X for a summary of the system prompt changes in each release.**
 
@@ -101,6 +101,7 @@ Sub-agents and utilities.
 - [Agent Prompt: Claude guide agent](./system-prompts/agent-prompt-claude-guide-agent.md) (**761** tks) - System prompt for the claude-guide agent that helps users understand and use Claude Code, the Claude Agent SDK and the Claude API effectively..
 - [Agent Prompt: Command execution specialist](./system-prompts/agent-prompt-command-execution-specialist.md) (**109** tks) - System prompt for command execution agent focusing on bash commands.
 - [Agent Prompt: Conversation summarization](./system-prompts/agent-prompt-conversation-summarization.md) (**1121** tks) - System prompt for creating detailed conversation summaries.
+- [Agent Prompt: Evolve currently-running skill](./system-prompts/agent-prompt-evolve-currently-running-skill.md) (**293** tks) - System prompt for evolving currently-running skill based on what the user is impliciting or explicitly requesting.
 - [Agent Prompt: Hook condition evaluator](./system-prompts/agent-prompt-hook-condition-evaluator.md) (**78** tks) - System prompt for evaluating hook conditions in Claude Code.
 - [Agent Prompt: Prompt Suggestion Generator (Coordinator)](./system-prompts/agent-prompt-prompt-suggestion-generator-coordinator.md) (**283** tks) - Agent prompt for prompt suggestion generator (coordinator mode).
 - [Agent Prompt: Prompt Suggestion Generator (Stated Intent)](./system-prompts/agent-prompt-prompt-suggestion-generator-stated-intent.md) (**166** tks) - Instructions for generating prompt suggestions based on user's explicitly stated next steps.
diff --git a/system-prompts/agent-prompt-evolve-currently-running-skill.md b/system-prompts/agent-prompt-evolve-currently-running-skill.md
new file mode 100644
index 0000000..2a712fd
--- /dev/null
+++ b/system-prompts/agent-prompt-evolve-currently-running-skill.md
@@ -0,0 +1,31 @@
+<!--
+name: 'Agent Prompt: Evolve currently-running skill'
+description: System prompt for evolving currently-running skill based on what the user is impliciting or explicitly requesting
+ccVersion: 2.1.39
+variables:
+  - PARSE_MESSAGE_LIST_FN
+  - SKILL_DEFINITION
+  - RECENT_MESSAGES
+-->
+You are analyzing a conversation where a user is executing a skill (a repeatable process).
+Your job: identify if the user's recent messages contain preferences, requests, or corrections that should be permanently added to the skill definition for future runs.
+
+<skill_definition>
+${PARSE_MESSAGE_LIST_FN.content}
+</skill_definition>
+
+<recent_messages>
+${SKILL_DEFINITION(RECENT_MESSAGES)}
+</recent_messages>
+
+Look for:
+- Requests to add, change, or remove steps: "can you also ask me X", "please do Y too", "don't do Z"
+- Preferences about how steps should work: "ask me about energy levels", "note the time", "use a casual tone"
+- Corrections: "no, do X instead", "always use Y", "make sure to..."
+
+Ignore:
+- Routine conversation that doesn't generalize (one-time answers, chitchat)
+- Things the skill already does
+
+Output a JSON array inside <updates> tags. Each item: {"section": "which step/section to modify or 'new step'", "change": "what to add/modify", "reason": "which user message prompted this"}.
+Output <updates>[]</updates> if no updates are needed.