{"id":2947,"date":"2025-11-26T10:42:30","date_gmt":"2025-11-26T01:42:30","guid":{"rendered":"https:\/\/skanto.co.kr\/?p=2947"},"modified":"2025-11-26T11:05:35","modified_gmt":"2025-11-26T02:05:35","slug":"task-in-the-a2a-protocol","status":"publish","type":"post","link":"https:\/\/skanto.co.kr\/?p=2947","title":{"rendered":"\u00a0Task in the A2A Protocol"},"content":{"rendered":"\n<p>In the A2A protocol, when a client sends a message to an agent, the agent might determine that fulfilling the request requires a stateful operation (e.g., \u201cgenerate a report,\u201d \u201cbook a flight,\u201d \u201csummarize a document\u201d). This is where the&nbsp;<code><strong>Task<\/strong><\/code><strong>&nbsp;Object<\/strong>&nbsp;comes into play. It is the fundamental, stateful unit of work processed by the A2A Server (remote agent) for an A2A Client, encapsulating the entire interaction related to achieving a specific goal or request.<\/p>\n\n\n\n<p>Key characteristics of a&nbsp;<code>Task<\/code>&nbsp;include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Initiation and Identification:<\/strong>&nbsp;A Task is typically initiated based on a client\u2019s request. The remote agent then creates and manages the&nbsp;<code>Task<\/code>, assigning it a&nbsp;<strong>unique, server-generated&nbsp;<\/strong><code><strong>id<\/strong><\/code>&nbsp;(often a UUID). Many A2A interactions revolve around this&nbsp;<code>Task<\/code>&nbsp;and its&nbsp;<code>id<\/code>.<\/li>\n\n\n\n<li>Progresses through a defined&nbsp;<strong>lifecycle of states<\/strong>:&nbsp;<code>submitted<\/code>&nbsp;(Task has been received),&nbsp;<code>working<\/code>&nbsp;(Agent is actively processing the task),&nbsp;<code>input-required<\/code>&nbsp;(Agent needs more input to proceed),&nbsp;<code>completed<\/code>&nbsp;(Task finished successfully),&nbsp;<code>failed<\/code>&nbsp;(Task could not be completed due to an error),&nbsp;<code>canceled<\/code>&nbsp;(Task was terminated by the client or system)<\/li>\n\n\n\n<li><strong>Interaction History:<\/strong>&nbsp;A&nbsp;<code>Task<\/code>&nbsp;is stateful and can involve multiple exchanges. It can contain a sequence of&nbsp;<code><strong>Messages<\/strong><\/code>&nbsp;(often in a&nbsp;<code>history<\/code>field), representing the conversational turns between the client and the agent within the context of that task.<\/li>\n\n\n\n<li><strong>Outputs:<\/strong>&nbsp;A successfully completed&nbsp;<code>Task<\/code>&nbsp;typically produces one or more&nbsp;<code><strong>Artifacts<\/strong><\/code>&nbsp;\u2014 the immutable results or outputs of the agent&#8217;s work (e.g., a generated summary, a file, an image, or structured data).<\/li>\n\n\n\n<li><strong>Orchestration and Context:<\/strong>&nbsp;While individual tasks are fundamental, A2A also supports more complex scenarios. For instance, the&nbsp;<strong>A2A Python SDK includes features like a \u201crequest context builder with&nbsp;<\/strong><code><strong>referenceTasks<\/strong><\/code><strong>&#8220;<\/strong>. This indicates capabilities within the A2A ecosystem to link and manage interdependent tasks, allowing for sophisticated orchestration where the context or outcome of one task can influence another. A&nbsp;<code>Task<\/code>&nbsp;object itself often includes a&nbsp;<code>contextId<\/code>&nbsp;to help group related tasks.<\/li>\n<\/ul>\n\n\n\n<p id=\"f109\">By defining interactions within the framework of Tasks, A2A provides a standardized way to manage both simple and complex collaborative efforts between AI agents.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Task: The Unit of Collaboration<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Message: The Conversational Turns\n<ul class=\"wp-block-list\">\n<li>Part: The Fundamental Content Units<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Artifact: The Result (immutable results)\n<ul class=\"wp-block-list\">\n<li>Part: The Fundamental Content Units<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/miro.medium.com\/v2\/resize:fit:720\/format:webp\/1*uWA_1we6m4X1MpM2424jAQ.png\" alt=\"\"\/><\/figure>\n\n\n\n<p>\ucc38\uace0: <a href=\"https:\/\/medium.com\/google-cloud\/understanding-a2a-the-protocol-for-agent-collaboration-2eade88246ca\">Understanding A2A \u2014 The Protocol for Agent Collaboration<\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the A2A protocol, when a client sends a message to an agent, the agent might determine that fulfilling the request requires a stateful operation (e.g., \u201cgenerate a report,\u201d \u201cbook a flight,\u201d \u201csummarize a document\u201d). This is where the&nbsp;Task&nbsp;Object&nbsp;comes into play. It is the fundamental, stateful unit of work processed by the A2A Server (remote agent) for an A2A Client, encapsulating the entire interaction related to achieving a specific goal or request. Key characteristics of a&nbsp;Task&nbsp;include: By defining interactions within&#8230;<\/p>\n<p class=\"read-more\"><a class=\"btn btn-default\" href=\"https:\/\/skanto.co.kr\/?p=2947\"> Read More<span class=\"screen-reader-text\">  Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[14,7],"tags":[238,285],"class_list":["post-2947","post","type-post","status-publish","format-standard","hentry","category-sw-development","category-7","tag-a2a","tag-task"],"_links":{"self":[{"href":"https:\/\/skanto.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/2947","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/skanto.co.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/skanto.co.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/skanto.co.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/skanto.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2947"}],"version-history":[{"count":3,"href":"https:\/\/skanto.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/2947\/revisions"}],"predecessor-version":[{"id":2951,"href":"https:\/\/skanto.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/2947\/revisions\/2951"}],"wp:attachment":[{"href":"https:\/\/skanto.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2947"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/skanto.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2947"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/skanto.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2947"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}