docs: add example prompts from claude-code-system-prompts

Added reference prompts for agent and tool implementations:

agents/explore/ - Codebase exploration agent prompt
agents/plan/    - Plan mode with system reminders
agents/task/    - Task execution agent prompt
agents/         - Main system prompt reference

tools/file/     - Read, Edit, Write, Glob tool descriptions
tools/shell/    - Bash with git commit/PR instructions
tools/search/   - Grep, WebSearch, WebFetch descriptions

Source: gitea:library/claude-code-system-prompts

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/domains/tools/search/example-prompt.md

@@ -0,0 +1,84 @@
+<!--
+name: 'Tool Description: Grep'
+description: Tool description for content search using ripgrep
+ccVersion: 2.0.14
+variables:
+  - GREP_TOOL_NAME
+  - BASH_TOOL_NAME
+  - TASK_TOOL_NAME
+-->
+A powerful search tool built on ripgrep
+
+  Usage:
+  - ALWAYS use ${GREP_TOOL_NAME} for search tasks. NEVER invoke \`grep\` or \`rg\` as a ${BASH_TOOL_NAME} command. The ${GREP_TOOL_NAME} tool has been optimized for correct permissions and access.
+  - Supports full regex syntax (e.g., "log.*Error", "function\\s+\\w+")
+  - Filter files with glob parameter (e.g., "*.js", "**/*.tsx") or type parameter (e.g., "js", "py", "rust")
+  - Output modes: "content" shows matching lines, "files_with_matches" shows only file paths (default), "count" shows match counts
+  - Use ${TASK_TOOL_NAME} tool for open-ended searches requiring multiple rounds
+  - Pattern syntax: Uses ripgrep (not grep) - literal braces need escaping (use \`interface\\{\\}\` to find \`interface{}\` in Go code)
+  - Multiline matching: By default patterns match within single lines only. For cross-line patterns like \`struct \\{[\\s\\S]*?field\`, use \`multiline: true\`
+
+
+---
+
+
+<!--
+name: 'Tool Description: WebSearch'
+description: Tool description for web search functionality
+ccVersion: 2.0.56
+variables:
+  - GET_CURRENT_DATE_FN
+-->
+
+- Allows Claude to search the web and use the results to inform responses
+- Provides up-to-date information for current events and recent data
+- Returns search result information formatted as search result blocks, including links as markdown hyperlinks
+- Use this tool for accessing information beyond Claude's knowledge cutoff
+- Searches are performed automatically within a single API call
+
+CRITICAL REQUIREMENT - You MUST follow this:
+  - After answering the user's question, you MUST include a "Sources:" section at the end of your response
+  - In the Sources section, list all relevant URLs from the search results as markdown hyperlinks: [Title](URL)
+  - This is MANDATORY - never skip including sources in your response
+  - Example format:
+
+    [Your answer here]
+
+    Sources:
+    - [Source Title 1](https://example.com/1)
+    - [Source Title 2](https://example.com/2)
+
+Usage notes:
+  - Domain filtering is supported to include or block specific websites
+  - Web search is only available in the US
+
+IMPORTANT - Use the correct year in search queries:
+  - Today's date is ${GET_CURRENT_DATE_FN()}. You MUST use this year when searching for recent information, documentation, or current events.
+  - Example: If today is 2025-07-15 and the user asks for "latest React docs", search for "React documentation 2025", NOT "React documentation 2024"
+
+
+---
+
+
+<!--
+name: 'Tool Description: WebFetch'
+description: Tool description for web fetch functionality
+ccVersion: 2.0.62
+-->
+
+- Fetches content from a specified URL and processes it using an AI model
+- Takes a URL and a prompt as input
+- Fetches the URL content, converts HTML to markdown
+- Processes the content with the prompt using a small, fast model
+- Returns the model's response about the content
+- Use this tool when you need to retrieve and analyze web content
+
+Usage notes:
+  - IMPORTANT: If an MCP-provided web fetch tool is available, prefer using that tool instead of this one, as it may have fewer restrictions.
+  - The URL must be a fully-formed valid URL
+  - HTTP URLs will be automatically upgraded to HTTPS
+  - The prompt should describe what information you want to extract from the page
+  - This tool is read-only and does not modify any files
+  - Results may be summarized if the content is very large
+  - Includes a self-cleaning 15-minute cache for faster responses when repeatedly accessing the same URL
+  - When a URL redirects to a different host, the tool will inform you and provide the redirect URL in a special format. You should then make a new WebFetch request with the redirect URL to fetch the content.