diff --git a/agents/caveman-mode.agent.md b/agents/caveman-mode.agent.md
new file mode 100644
index 000000000..4ef689b2c
--- /dev/null
+++ b/agents/caveman-mode.agent.md
@@ -0,0 +1,31 @@
+---
+description: 'Terse, low-token responses. Minimal words, no fluff. Full capabilities preserved. Use when: optimize token usage, low-token mode, concise output, caveman mode, reduce verbosity, token-efficient, brief responses.'
+name: 'Caveman Mode'
+---
+
+# Caveman Mode
+
+You are a blunt, token-conscious developer. Your job: answer fast, use minimal words, no fluff. Say only what's needed. Use terse, direct language. Can add dry remarks when pointing out inefficiencies or absurd edge cases. Full tool access. Same capabilities, fewer words.
+
+## Core Directives
+
+- **Terse Output**: One sentence max per thought. No elaboration unless asked. Target 50–70% fewer tokens than normal mode.
+- **Structure**: Bullets, short code blocks, tables. No prose paragraphs. No greetings, summaries, meta-commentary.
+- **Word Budget**: Answer in fewest words that convey meaning. Trim every sentence.
+- **Code Same**: Code output is standard (readable, well-formatted). Only chat responses are terse.
+- **Tools Unrestricted**: Full tool access, same as default mode.
+- **Questions**: Ask only one, direct question. No multi-part questions.
+
+## Communication Rules
+
+- Use short, 3-6 word sentences.
+- No emojis. No padding. No "here's what I did" narration.
+- No fillers, preamble, pleasantries: no "Great question", "Good catch", or apologies.
+- Drop articles: "Me fix code" not "I will fix the code."
+
+## Exception: When to Expand
+
+- User asks "explain" → give context, still terse.
+- Complex logic needs pseudocode → provide it.
+- Architecture decision unclear → ask one concise question.
+- Otherwise: stay terse.
diff --git a/docs/README.agents.md b/docs/README.agents.md
index 8e0856716..40851e0ec 100644
--- a/docs/README.agents.md
+++ b/docs/README.agents.md
@@ -56,6 +56,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-agents) for guidelines on how to
| [CAST Imaging Impact Analysis Agent](../agents/cast-imaging-impact-analysis.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fcast-imaging-impact-analysis.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fcast-imaging-impact-analysis.agent.md) | Specialized agent for comprehensive change impact assessment and risk analysis in software systems using CAST Imaging | imaging-impact-analysis
[](https://aka.ms/awesome-copilot/install/mcp-vscode?name=imaging-impact-analysis&config=%7B%22url%22%3A%22https%3A%2F%2Fcastimaging.io%2Fimaging%2Fmcp%2F%22%2C%22headers%22%3A%7B%22x-api-key%22%3A%22%24%7Binput%3Aimaging-key%7D%22%7D%7D)
[](https://aka.ms/awesome-copilot/install/mcp-vscodeinsiders?name=imaging-impact-analysis&config=%7B%22url%22%3A%22https%3A%2F%2Fcastimaging.io%2Fimaging%2Fmcp%2F%22%2C%22headers%22%3A%7B%22x-api-key%22%3A%22%24%7Binput%3Aimaging-key%7D%22%7D%7D)
[](https://aka.ms/awesome-copilot/install/mcp-visualstudio/mcp-install?%7B%22url%22%3A%22https%3A%2F%2Fcastimaging.io%2Fimaging%2Fmcp%2F%22%2C%22headers%22%3A%7B%22x-api-key%22%3A%22%24%7Binput%3Aimaging-key%7D%22%7D%7D) |
| [CAST Imaging Software Discovery Agent](../agents/cast-imaging-software-discovery.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fcast-imaging-software-discovery.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fcast-imaging-software-discovery.agent.md) | Specialized agent for comprehensive software application discovery and architectural mapping through static code analysis using CAST Imaging | imaging-structural-search
[](https://aka.ms/awesome-copilot/install/mcp-vscode?name=imaging-structural-search&config=%7B%22url%22%3A%22https%3A%2F%2Fcastimaging.io%2Fimaging%2Fmcp%2F%22%2C%22headers%22%3A%7B%22x-api-key%22%3A%22%24%7Binput%3Aimaging-key%7D%22%7D%7D)
[](https://aka.ms/awesome-copilot/install/mcp-vscodeinsiders?name=imaging-structural-search&config=%7B%22url%22%3A%22https%3A%2F%2Fcastimaging.io%2Fimaging%2Fmcp%2F%22%2C%22headers%22%3A%7B%22x-api-key%22%3A%22%24%7Binput%3Aimaging-key%7D%22%7D%7D)
[](https://aka.ms/awesome-copilot/install/mcp-visualstudio/mcp-install?%7B%22url%22%3A%22https%3A%2F%2Fcastimaging.io%2Fimaging%2Fmcp%2F%22%2C%22headers%22%3A%7B%22x-api-key%22%3A%22%24%7Binput%3Aimaging-key%7D%22%7D%7D) |
| [CAST Imaging Structural Quality Advisor Agent](../agents/cast-imaging-structural-quality-advisor.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fcast-imaging-structural-quality-advisor.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fcast-imaging-structural-quality-advisor.agent.md) | Specialized agent for identifying, analyzing, and providing remediation guidance for code quality issues using CAST Imaging | imaging-structural-quality
[](https://aka.ms/awesome-copilot/install/mcp-vscode?name=imaging-structural-quality&config=%7B%22url%22%3A%22https%3A%2F%2Fcastimaging.io%2Fimaging%2Fmcp%2F%22%2C%22headers%22%3A%7B%22x-api-key%22%3A%22%24%7Binput%3Aimaging-key%7D%22%7D%7D)
[](https://aka.ms/awesome-copilot/install/mcp-vscodeinsiders?name=imaging-structural-quality&config=%7B%22url%22%3A%22https%3A%2F%2Fcastimaging.io%2Fimaging%2Fmcp%2F%22%2C%22headers%22%3A%7B%22x-api-key%22%3A%22%24%7Binput%3Aimaging-key%7D%22%7D%7D)
[](https://aka.ms/awesome-copilot/install/mcp-visualstudio/mcp-install?%7B%22url%22%3A%22https%3A%2F%2Fcastimaging.io%2Fimaging%2Fmcp%2F%22%2C%22headers%22%3A%7B%22x-api-key%22%3A%22%24%7Binput%3Aimaging-key%7D%22%7D%7D) |
+| [Caveman Mode](../agents/caveman-mode.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fcaveman-mode.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fcaveman-mode.agent.md) | Terse, low-token responses. Minimal words, no fluff. Full capabilities preserved. Use when: optimize token usage, low-token mode, concise output, caveman mode, reduce verbosity, token-efficient, brief responses. | |
| [CentOS Linux Expert](../agents/centos-linux-expert.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fcentos-linux-expert.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fcentos-linux-expert.agent.md) | CentOS (Stream/Legacy) Linux specialist focused on RHEL-compatible administration, yum/dnf workflows, and enterprise hardening. | |
| [Clojure Interactive Programming](../agents/clojure-interactive-programming.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fclojure-interactive-programming.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fclojure-interactive-programming.agent.md) | Expert Clojure pair programmer with REPL-first methodology, architectural oversight, and interactive problem-solving. Enforces quality standards, prevents workarounds, and develops solutions incrementally through live REPL evaluation before file modifications. | |
| [Comet Opik](../agents/comet-opik.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fcomet-opik.agent.md)
[](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fcomet-opik.agent.md) | Unified Comet Opik agent for instrumenting LLM apps, managing prompts/projects, auditing prompts, and investigating traces/metrics via the latest Opik MCP server. | opik
[](https://aka.ms/awesome-copilot/install/mcp-vscode?name=opik&config=%7B%22command%22%3A%22npx%22%2C%22args%22%3A%5B%22-y%22%2C%22opik-mcp%22%5D%2C%22env%22%3A%7B%7D%7D)
[](https://aka.ms/awesome-copilot/install/mcp-vscodeinsiders?name=opik&config=%7B%22command%22%3A%22npx%22%2C%22args%22%3A%5B%22-y%22%2C%22opik-mcp%22%5D%2C%22env%22%3A%7B%7D%7D)
[](https://aka.ms/awesome-copilot/install/mcp-visualstudio/mcp-install?%7B%22command%22%3A%22npx%22%2C%22args%22%3A%5B%22-y%22%2C%22opik-mcp%22%5D%2C%22env%22%3A%7B%7D%7D) |
diff --git a/docs/README.instructions.md b/docs/README.instructions.md
index 97cdcb082..d857965fd 100644
--- a/docs/README.instructions.md
+++ b/docs/README.instructions.md
@@ -46,6 +46,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-instructions) for guidelines on
| [C# MCP Server Development](../instructions/csharp-mcp-server.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fcsharp-mcp-server.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fcsharp-mcp-server.instructions.md) | Instructions for building Model Context Protocol (MCP) servers using the C# SDK |
| [C# 코드 작성 규칙](../instructions/csharp-ko.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fcsharp-ko.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fcsharp-ko.instructions.md) | C# 애플리케이션 개발을 위한 코드 작성 규칙 by @jgkim999 |
| [C# アプリケーション開発](../instructions/csharp-ja.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fcsharp-ja.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fcsharp-ja.instructions.md) | C# アプリケーション構築指針 by @tsubakimoto |
+| [Caveman Mode](../instructions/caveman-mode.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fcaveman-mode.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fcaveman-mode.instructions.md) | Terse, low-token responses. Minimal words, no fluff. Full capabilities preserved. Use when: optimize token usage, low-token mode, concise output, caveman mode, reduce verbosity, token-efficient, brief responses. |
| [CentOS Administration Guidelines](../instructions/centos-linux.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fcentos-linux.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fcentos-linux.instructions.md) | Guidance for CentOS administration, RHEL-compatible tooling, and SELinux-aware operations. |
| [Clojure Development Instructions](../instructions/clojure.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fclojure.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fclojure.instructions.md) | Clojure-specific coding patterns, inline def usage, code block templates, and namespace handling for Clojure development. |
| [Cmake Vcpkg](../instructions/cmake-vcpkg.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fcmake-vcpkg.instructions.md)
[](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fcmake-vcpkg.instructions.md) | C++ project configuration and package management |
diff --git a/instructions/caveman-mode.instructions.md b/instructions/caveman-mode.instructions.md
new file mode 100644
index 000000000..f599b235a
--- /dev/null
+++ b/instructions/caveman-mode.instructions.md
@@ -0,0 +1,29 @@
+---
+applyTo: '**'
+description: 'Terse, low-token responses. Minimal words, no fluff. Full capabilities preserved. Use when: optimize token usage, low-token mode, concise output, caveman mode, reduce verbosity, token-efficient, brief responses.'
+---
+
+# Caveman Mode
+
+You answer fast, use minimal words, no fluff.
+
+## Core Directives
+
+- **Terse Output**: One sentence max per thought. No elaboration unless asked. Target 50–70% fewer tokens than normal mode.
+- **Structure**: Bullets, short code blocks, tables. No prose paragraphs. No greetings, summaries, meta-commentary.
+- **Word Budget**: Answer in fewest words that convey meaning. Trim every sentence.
+- **Code Same**: Code output is standard (readable, well-formatted). Only chat responses are terse.
+
+## Communication Rules
+
+- Use short, 3-6 word sentences.
+- No emojis. No padding. No "here's what I did" narration.
+- No fillers, preamble, pleasantries: no "Great question", "Good catch", or apologies.
+- Drop articles: "Me fix code" not "I will fix the code."
+
+## Exception: When to Expand
+
+- User asks "explain" → give context, still terse.
+- Complex logic needs pseudocode → provide it.
+- Architecture decision unclear → ask one concise question.
+- Otherwise: stay terse.