Anthropic Protocol

Expertly crafted prompts and instructions extracted from the Anthropic system. Master the patterns that power professional AI interactions.

26 Blocks

System Protocol

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Prompt Architecture

Browse structured rules and examples for this system.

Protocol Block

Task Agent

Technical Spec

Launches a new agent to handle complex, multi-step tasks autonomously. Supports general-purpose agents, status line configuration, and output styles.

Examples

Write a function to check prime numbers.

Agent: I will write the function and then use the 'code-reviewer' agent to validate the implementation.

Usage Strategy

Use this protocol when you need deep research or code searches that require autonomy. Ideal for tasks you cannot solve in a single attempt.

Test Prompt

Protocol Block

Computer Use

Technical Spec

Interacts with the operating system and browser via mouse and keyboard control. Enables clicks, typing, screenshots, and scrolling.

Examples

Step 1

screenshot -> Analyze image -> left_click at [x, y] to open the menu.

Step 2

type -> Enter 'https://google.com' in the address bar.

Usage Strategy

Before any click action, always request a screenshot to confirm visual coordinates. Ensure the cursor lands in the center of the target element.

Test Prompt

Protocol Block

Element Discovery (Find)

Technical Spec

Locates specific elements on a web page using natural language descriptions. Useful for finding buttons, search bars, or products without knowing their coordinates.

Examples

Find the 'Add to cart' button.

Agent: [Use find with query 'add to cart button'] -> Returns ref_123

Usage Strategy

Use 'find' when you need to interact with an element but are unsure of its exact position. Returns reference IDs that can be used with other tools.

Test Prompt

Protocol Block

Page Structure (Read Page)

Technical Spec

Extracts the accessibility tree of the current page to understand its semantic structure. Shows interactive elements, labels, and hierarchies.

Examples

read_page with filter='interactive' to list only available buttons and links.

Usage Strategy

Use 'read_page' to get an overview of the DOM hierarchy. If the output is too large, use 'depth' or focus on a specific 'ref_id'.

Test Prompt

Protocol Block

JavaScript Execution

Technical Spec

Runs JavaScript directly in the current web page context. Allows DOM manipulation, calling page functions, and extracting complex data.

Examples

javascript_tool -> text: 'window.appData.user.id' -> Returns the current user ID.

Usage Strategy

Use this tool for tasks visual tools cannot perform, such as extracting data from a global window variable or firing specific events.

Test Prompt

Protocol Block

Network & Console Debugging

Technical Spec

Monitors network requests (XHR/Fetch) and browser console messages. Essential for diagnosing API errors or client-side logic failures.

Examples

read_console_messages with pattern='error' to find script load failures.

Usage Strategy

When a web action fails silently, check 'read_console_messages' and 'read_network_requests' to identify 4xx/5xx errors or JS exceptions.

Test Prompt

Protocol Block

Bash Persistence

Technical Spec

Runs bash commands in a persistent session. Includes directory checks, handling spaces in paths, and safe execution.

Examples

npm install -> Installs project dependencies.

Usage Strategy

Use this block to interact with the operating system. Always verify the parent directory exists before creating files.

Test Prompt

Protocol Block

Precise Editing

Technical Spec

Performs exact string replacements in files. Requires reading the file first to ensure context and indentation accuracy.

Examples

Read main.js -> Identify the function -> Use Edit to update the logic.

Usage Strategy

To edit code, read the file first. Capture enough context in 'old_string' so it is unique.

Test Prompt

Protocol Block

GIF Automation Export

Technical Spec

Records and exports automation sessions as animated GIFs. Includes visual click indicators, drag paths, and action labels.

Examples

start_recording -> Run purchase sequence -> stop_recording -> export.

Usage Strategy

Start recording before a complex sequence of steps to document agent behavior or create automatic tutorials.

Test Prompt

Protocol Block

Git Workflow

Technical Spec

Protocol for managing commits and pull requests. Includes diff analysis, concise message drafting, and repository standards compliance.

Examples

git status -> git diff -> git commit with a descriptive message.

Usage Strategy

When you finish a task, use this protocol to confirm changes. The assistant will analyze the log to follow the project's commit style.

Test Prompt

Protocol Block

Computer Use

Technical Spec

Use a mouse and keyboard to interact with a web browser, and take screenshots. If you don't have a valid tab ID, use tabs_context first to get available tabs. * Whenever you intend to click on an element like an icon, you should consult a screenshot to determine the coordinates of the element before moving the cursor. * If you tried clicking on a program or link but it failed to load, even after waiting, try adjusting your click location so that the tip of the cursor visually falls on the element that you want to click. * Make sure to click any buttons, links, icons, etc with the cursor tip in the center of the element. Don't click boxes on their edges unless asked.

Usage Strategy

Low-level automation tool for browser control. Integrated into the computer protocol.

Test Prompt

Protocol Block

Find

Technical Spec

Find elements on the page using natural language. Can search for elements by their purpose (e.g., "search bar", "login button") or by text content (e.g., "organic mango product"). Returns up to 20 matching elements with references that can be used with other tools. If more than 20 matches exist, you'll be notified to use a more specific query. If you don't have a valid tab ID, use tabs_context first to get available tabs.

Usage Strategy

Low-level automation tool for browser control. Integrated into the find protocol.

Test Prompt

Protocol Block

Form_input

Technical Spec

Set values in form elements using element reference ID from the read_page tool. If you don't have a valid tab ID, use tabs_context first to get available tabs.

Usage Strategy

Low-level automation tool for browser control. Integrated into the form_input protocol.

Test Prompt

Protocol Block

Get_page_text

Technical Spec

Extract raw text content from the page, prioritizing article content. Ideal for reading articles, blog posts, or other text-heavy pages. Returns plain text without HTML formatting. If you don't have a valid tab ID, use tabs_context first to get available tabs.

Usage Strategy

Low-level automation tool for browser control. Integrated into the get_page_text protocol.

Test Prompt

Protocol Block

Gif_creator

Technical Spec

Manage GIF recording and export for browser automation sessions. Control when to start/stop recording browser actions (clicks, scrolls, navigation), then export as an animated GIF with visual overlays (click indicators, action labels, progress bar, watermark). All operations are scoped to the tab's group. When starting recording, take a screenshot immediately after to capture the initial state as the first frame. When stopping recording, take a screenshot immediately before to capture the final state as the last frame. For export, either provide 'coordinate' to drag/drop upload to a page element, or set 'download: true' to download the GIF.

Usage Strategy

Low-level automation tool for browser control. Integrated into the gif_creator protocol.

Test Prompt

Protocol Block

Javascript_tool

Technical Spec

Execute JavaScript code in the context of the current page. The code runs in the page's context and can interact with the DOM, window object, and page variables. Returns the result of the last expression or any thrown errors. If you don't have a valid tab ID, use tabs_context first to get available tabs.

Usage Strategy

Low-level automation tool for browser control. Integrated into the javascript_tool protocol.

Test Prompt

Protocol Block

Navigate

Technical Spec

Navigate to a URL, or go forward/back in browser history. If you don't have a valid tab ID, use tabs_context first to get available tabs.

Usage Strategy

Low-level automation tool for browser control. Integrated into the navigate protocol.

Test Prompt

Protocol Block

Read_console_messages

Technical Spec

Read browser console messages (console.log, console.error, console.warn, etc.) from a specific tab. Useful for debugging JavaScript errors, viewing application logs, or understanding what's happening in the browser console. Returns console messages from the current domain only. If you don't have a valid tab ID, use tabs_context first to get available tabs. IMPORTANT: Always provide a pattern to filter messages - without a pattern, you may get too many irrelevant messages.

Usage Strategy

Low-level automation tool for browser control. Integrated into the read_console_messages protocol.

Test Prompt

Protocol Block

Read_network_requests

Technical Spec

Read HTTP network requests (XHR, Fetch, documents, images, etc.) from a specific tab. Useful for debugging API calls, monitoring network activity, or understanding what requests a page is making. Returns all network requests made by the current page, including cross-origin requests. Requests are automatically cleared when the page navigates to a different domain. If you don't have a valid tab ID, use tabs_context first to get available tabs.

Usage Strategy

Low-level automation tool for browser control. Integrated into the read_network_requests protocol.

Test Prompt

Protocol Block

Read_page

Technical Spec

Get an accessibility tree representation of elements on the page. By default returns all elements including non-visible ones. Output is limited to 50000 characters. If the output exceeds this limit, you will receive an error asking you to specify a smaller depth or focus on a specific element using ref_id. Optionally filter for only interactive elements. If you don't have a valid tab ID, use tabs_context first to get available tabs.

Usage Strategy

Low-level automation tool for browser control. Integrated into the read_page protocol.

Test Prompt

Protocol Block

Resize_window

Technical Spec

Resize the current browser window to specified dimensions. Useful for testing responsive designs or setting up specific screen sizes. If you don't have a valid tab ID, use tabs_context first to get available tabs.

Usage Strategy

Low-level automation tool for browser control. Integrated into the resize_window protocol.

Test Prompt

Protocol Block

Tabs_context

Technical Spec

Get context information about all tabs in the current tab group

Usage Strategy

Low-level automation tool for browser control. Integrated into the tabs_context protocol.

Test Prompt

Protocol Block

Tabs_create

Technical Spec

Creates a new empty tab in the current tab group

Usage Strategy

Low-level automation tool for browser control. Integrated into the tabs_create protocol.

Test Prompt

Protocol Block

Turn_answer_start

Technical Spec

Call this immediately before your text response to the user for this turn. Required every turn - whether or not you made tool calls. After calling, write your response. No more tools after this.

Usage Strategy

Low-level automation tool for browser control. Integrated into the turn_answer_start protocol.

Test Prompt

Protocol Block

Update_plan

Technical Spec

Update the plan and present it to the user for approval before proceeding.

Usage Strategy

Low-level automation tool for browser control. Integrated into the update_plan protocol.

Test Prompt

Protocol Block

Upload_image

Technical Spec

Upload a previously captured screenshot or user-uploaded image to a file input or drag & drop target. Supports two approaches: (1) ref - for targeting specific elements, especially hidden file inputs, (2) coordinate - for drag & drop to visible locations like Google Docs. Provide either ref or coordinate, not both.

Usage Strategy

Low-level automation tool for browser control. Integrated into the upload_image protocol.

Test Prompt

Visual Context Examples

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Engineering Masterclass

1
Context-Aware Strategy

The protocols define how an agent should react to ambiguity. Always provide the "Strategy" to set the right technical boundaries.

2
Iterative Validation

Don't apply all protocols at once. Start with the "Agency" or "Task Management" blocks and scale up as the task grows in complexity.

3
Actionable Examples

Each example shows the expected input and output. Use them to train your own models or calibrate existing coding assistants.

Back to Library

Engineering Masterclass

1
Context-Aware Strategy

The protocols define how an agent should react to ambiguity. Always provide the "Strategy" to set the right technical boundaries.

2
Iterative Validation

Don't apply all protocols at once. Start with the "Agency" or "Task Management" blocks and scale up as the task grows in complexity.

3
Actionable Examples

Each example shows the expected input and output. Use them to train your own models or calibrate existing coding assistants.

Anthropic Protocol

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Visual Context Examples

Explore the global gallery

Engineering Masterclass

1Context-Aware Strategy

2Iterative Validation

3Actionable Examples

Anthropic Protocol

Prompt Architecture

Usage Strategy

Usage Strategy

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Visual Context Examples

Explore the global gallery

Engineering Masterclass

1Context-Aware Strategy

2Iterative Validation

3Actionable Examples

1
Context-Aware Strategy

2
Iterative Validation

3
Actionable Examples

1
Context-Aware Strategy

2
Iterative Validation

3
Actionable Examples