🐦 Twitter Post Details

Viewing enriched Twitter post

@hardmaru

Building AI agents for real world banking workflows is incredibly difficult. It requires structuring the implicit knowledge of veteran bankers. We just published a behind the scenes look at how our Applied Team built the MUFG AI Lending Expert. They explain how we adapted concepts from our research on ALE Agent and The AI Scientist to handle complex enterprise workflows. Taking AI from the lab to a major bank is not just about better prompts. The team even used AI to process nearly 1,500 pieces of human feedback, creating a high speed improvement loop that allowed the system to scale and adapt rapidly. This interview is a great look at the engineering and product culture we are building at Sakana AI. If you want to see how we tackle hard engineering challenges and build systems for mission critical environments, I highly recommend giving it a read. Blog (Japanese): https://t.co/RwyLKRHc4E

Media 1
View on Twitter

📊 Media Metadata

{
  "media": [
    {
      "type": "photo",
      "url": "https://crmoxkoizveukayfjuyo.supabase.co/storage/v1/object/public/media/posts/2034501463838535995/media_0.png",
      "filename": "media_0.png"
    }
  ],
  "processed_at": "2026-03-19T05:36:19.272673",
  "pipeline_version": "2.0"
}

🔧 Raw API Response

{
  "type": "tweet",
  "id": "2034501463838535995",
  "url": "https://x.com/hardmaru/status/2034501463838535995",
  "twitterUrl": "https://twitter.com/hardmaru/status/2034501463838535995",
  "text": "Building AI agents for real world banking workflows is incredibly difficult. It requires structuring the implicit knowledge of veteran bankers.\n\nWe just published a behind the scenes look at how our Applied Team built the MUFG AI Lending Expert. They explain how we adapted concepts from our research on ALE Agent and The AI Scientist to handle complex enterprise workflows.\n\nTaking AI from the lab to a major bank is not just about better prompts. The team even used AI to process nearly 1,500 pieces of human feedback, creating a high speed improvement loop that allowed the system to scale and adapt rapidly.\n\nThis interview is a great look at the engineering and product culture we are building at Sakana AI. If you want to see how we tackle hard engineering challenges and build systems for mission critical environments, I highly recommend giving it a read.\n\nBlog (Japanese): https://t.co/RwyLKRHc4E",
  "source": "Twitter for iPhone",
  "retweetCount": 2,
  "replyCount": 0,
  "likeCount": 3,
  "quoteCount": 0,
  "viewCount": 925,
  "createdAt": "Thu Mar 19 05:25:22 +0000 2026",
  "lang": "en",
  "bookmarkCount": 2,
  "isReply": false,
  "inReplyToId": null,
  "conversationId": "2034501463838535995",
  "displayTextRange": [
    0,
    273
  ],
  "inReplyToUserId": null,
  "inReplyToUsername": null,
  "author": {
    "type": "user",
    "userName": "hardmaru",
    "url": "https://x.com/hardmaru",
    "twitterUrl": "https://twitter.com/hardmaru",
    "id": "2895499182",
    "name": "hardmaru",
    "isVerified": false,
    "isBlueVerified": true,
    "verifiedType": null,
    "profilePicture": "https://pbs.twimg.com/profile_images/1678402467078234113/XN5Oy2UP_normal.jpg",
    "coverPicture": "https://pbs.twimg.com/profile_banners/2895499182/1429351923",
    "description": "",
    "location": "Minato-ku, Tokyo",
    "followers": 392195,
    "following": 1824,
    "status": "",
    "canDm": false,
    "canMediaTag": true,
    "createdAt": "Mon Nov 10 11:05:07 +0000 2014",
    "entities": {
      "description": {
        "urls": []
      },
      "url": {}
    },
    "fastFollowersCount": 0,
    "favouritesCount": 143464,
    "hasCustomTimelines": true,
    "isTranslator": false,
    "mediaCount": 4455,
    "statusesCount": 25788,
    "withheldInCountries": [],
    "affiliatesHighlightedLabel": {},
    "possiblySensitive": false,
    "pinnedTweetIds": [
      "1990204623471395284"
    ],
    "profile_bio": {
      "description": "Co-Founder and CEO @SakanaAILabs 🎏",
      "entities": {
        "description": {
          "hashtags": [],
          "symbols": [],
          "urls": [],
          "user_mentions": [
            {
              "id_str": "0",
              "indices": [
                19,
                32
              ],
              "name": "",
              "screen_name": "SakanaAILabs"
            }
          ]
        },
        "url": {
          "urls": [
            {
              "display_url": "sakana.ai",
              "expanded_url": "https://sakana.ai/",
              "indices": [
                0,
                23
              ],
              "url": "https://t.co/cVQF43vIdu"
            }
          ]
        }
      }
    },
    "isAutomated": false,
    "automatedBy": null
  },
  "extendedEntities": {},
  "card": {
    "binding_values": [
      {
        "key": "photo_image_full_size_large",
        "value": {
          "image_value": {
            "height": 419,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=jpg&name=800x419",
            "width": 800
          }
        }
      },
      {
        "key": "thumbnail_image",
        "value": {
          "image_value": {
            "height": 200,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=jpg&name=400x400",
            "width": 400
          }
        }
      },
      {
        "key": "description",
        "value": {
          "string_value": "【Sakana AI Applied Case Interview】銀行業務へのAIエージェント実装に向けた開発の舞台裏"
        }
      },
      {
        "key": "domain",
        "value": {
          "string_value": "sakana.ai"
        }
      },
      {
        "key": "thumbnail_image_large",
        "value": {
          "image_value": {
            "height": 300,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=jpg&name=600x600",
            "width": 600
          }
        }
      },
      {
        "key": "summary_photo_image_small",
        "value": {
          "image_value": {
            "height": 202,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=jpg&name=386x202",
            "width": 386
          }
        }
      },
      {
        "key": "thumbnail_image_original",
        "value": {
          "image_value": {
            "height": 800,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=jpg&name=orig",
            "width": 1600
          }
        }
      },
      {
        "key": "site",
        "value": {
          "scribe_key": "publisher_id",
          "user_value": {
            "id_str": "218811492",
            "path": []
          }
        }
      },
      {
        "key": "photo_image_full_size_small",
        "value": {
          "image_value": {
            "height": 202,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=jpg&name=386x202",
            "width": 386
          }
        }
      },
      {
        "key": "summary_photo_image_large",
        "value": {
          "image_value": {
            "height": 419,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=jpg&name=800x419",
            "width": 800
          }
        }
      },
      {
        "key": "thumbnail_image_small",
        "value": {
          "image_value": {
            "height": 72,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=jpg&name=144x144",
            "width": 144
          }
        }
      },
      {
        "key": "thumbnail_image_x_large",
        "value": {
          "image_value": {
            "height": 800,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=png&name=2048x2048_2_exp",
            "width": 1600
          }
        }
      },
      {
        "key": "photo_image_full_size_original",
        "value": {
          "image_value": {
            "height": 800,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=jpg&name=orig",
            "width": 1600
          }
        }
      },
      {
        "key": "vanity_url",
        "value": {
          "scribe_key": "vanity_url",
          "string_value": "sakana.ai"
        }
      },
      {
        "key": "photo_image_full_size",
        "value": {
          "image_value": {
            "height": 314,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=jpg&name=600x314",
            "width": 600
          }
        }
      },
      {
        "key": "thumbnail_image_color",
        "value": {
          "image_color_value": {
            "palette": [
              {
                "percentage": 94.69,
                "rgb": {
                  "blue": 255,
                  "green": 255,
                  "red": 255
                }
              },
              {
                "percentage": 2.86,
                "rgb": {
                  "blue": 69,
                  "green": 69,
                  "red": 69
                }
              },
              {
                "percentage": 0.45,
                "rgb": {
                  "blue": 129,
                  "green": 138,
                  "red": 227
                }
              }
            ]
          }
        }
      },
      {
        "key": "title",
        "value": {
          "string_value": "Sakana AI"
        }
      },
      {
        "key": "summary_photo_image_color",
        "value": {
          "image_color_value": {
            "palette": [
              {
                "percentage": 94.69,
                "rgb": {
                  "blue": 255,
                  "green": 255,
                  "red": 255
                }
              },
              {
                "percentage": 2.86,
                "rgb": {
                  "blue": 69,
                  "green": 69,
                  "red": 69
                }
              },
              {
                "percentage": 0.45,
                "rgb": {
                  "blue": 129,
                  "green": 138,
                  "red": 227
                }
              }
            ]
          }
        }
      },
      {
        "key": "summary_photo_image_x_large",
        "value": {
          "image_value": {
            "height": 800,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=png&name=2048x2048_2_exp",
            "width": 1600
          }
        }
      },
      {
        "key": "summary_photo_image",
        "value": {
          "image_value": {
            "height": 314,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=jpg&name=600x314",
            "width": 600
          }
        }
      },
      {
        "key": "photo_image_full_size_color",
        "value": {
          "image_color_value": {
            "palette": [
              {
                "percentage": 94.69,
                "rgb": {
                  "blue": 255,
                  "green": 255,
                  "red": 255
                }
              },
              {
                "percentage": 2.86,
                "rgb": {
                  "blue": 69,
                  "green": 69,
                  "red": 69
                }
              },
              {
                "percentage": 0.45,
                "rgb": {
                  "blue": 129,
                  "green": 138,
                  "red": 227
                }
              }
            ]
          }
        }
      },
      {
        "key": "photo_image_full_size_x_large",
        "value": {
          "image_value": {
            "height": 800,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=png&name=2048x2048_2_exp",
            "width": 1600
          }
        }
      },
      {
        "key": "card_url",
        "value": {
          "scribe_key": "card_url",
          "string_value": "https://t.co/RwyLKRHc4E"
        }
      },
      {
        "key": "summary_photo_image_original",
        "value": {
          "image_value": {
            "height": 800,
            "url": "https://pbs.twimg.com/card_img/2032579066256367616/CNXRuHDU?format=jpg&name=orig",
            "width": 1600
          }
        }
      }
    ],
    "card_platform": {
      "platform": {
        "audience": {
          "name": "production"
        },
        "device": {
          "name": "iPhone",
          "version": "13"
        }
      }
    },
    "name": "summary_large_image",
    "url": "https://t.co/RwyLKRHc4E",
    "user_refs_results": [
      {
        "rest_id": "218811492",
        "result": {
          "__typename": "User",
          "action_counts": {
            "favorites_count": 1
          },
          "avatar": {
            "image_url": "https://pbs.twimg.com/profile_images/1885939209388929024/dtnrOdGp_normal.jpg"
          },
          "banner": {
            "image_url": "https://pbs.twimg.com/profile_banners/218811492/1686643464"
          },
          "core": {
            "created_at": "Tue Nov 23 10:20:07 +0000 2010",
            "name": "Sakana AI",
            "screen_name": "SakanaAILabs"
          },
          "dm_permissions": {
            "can_dm": false
          },
          "exclusive_tweet_following": false,
          "follow_request_sent": false,
          "identity_profile_labels_highlighted_label": {},
          "location": {
            "location": "Tokyo, Japan"
          },
          "media_permissions": {
            "can_media_tag": true
          },
          "notifications_settings": {
            "notifications_enabled": false
          },
          "pinned_items": {
            "tweet_ids_str": [
              "1823178623513239992"
            ]
          },
          "privacy": {
            "protected": false,
            "suspended": false
          },
          "private_super_following": false,
          "profile_bio": {
            "description": "Sakana AI is an AI R&D company based in Tokyo. We want to develop AI solutions for Japan’s needs, and democratize AI in Japan. https://t.co/OWL1EpmWtn",
            "entities": {
              "description": {
                "hashtags": [],
                "symbols": [],
                "urls": [
                  {
                    "display_url": "sakana.ai/careers",
                    "expanded_url": "http://sakana.ai/careers",
                    "indices": [
                      127,
                      150
                    ],
                    "url": "https://t.co/OWL1EpmWtn"
                  }
                ],
                "user_mentions": []
              },
              "url": {
                "urls": [
                  {
                    "display_url": "sakana.ai",
                    "expanded_url": "https://sakana.ai/",
                    "indices": [
                      0,
                      23
                    ],
                    "url": "https://t.co/1m2lSgnfB2"
                  }
                ]
              }
            }
          },
          "profile_image_shape": "Square",
          "profile_metadata": {
            "profile_interstitial_type": "",
            "profile_link_color": "1DA1F2"
          },
          "profile_translation": {
            "translator_type_enum": "None"
          },
          "properties": {
            "has_extended_profile": false
          },
          "relationship_counts": {
            "followers": 63006,
            "following": 0
          },
          "relationship_perspectives": {
            "blocked_by": false,
            "blocking": false,
            "followed_by": false,
            "following": false,
            "live_following": false,
            "muting": false
          },
          "rest_id": "218811492",
          "smart_blocked_by": false,
          "smart_blocking": false,
          "super_follow_eligible": false,
          "super_followed_by": false,
          "super_following": false,
          "tweet_counts": {
            "media_tweets": 336,
            "tweets": 965
          },
          "verification": {
            "is_blue_verified": true,
            "verified": false,
            "verified_type": "Business"
          },
          "website": {
            "url": "https://t.co/1m2lSgnfB2"
          }
        }
      }
    ]
  },
  "place": {},
  "entities": {
    "hashtags": [],
    "symbols": [],
    "urls": [
      {
        "display_url": "sakana.ai/mufg-ai-lendin…",
        "expanded_url": "https://sakana.ai/mufg-ai-lending-interview/",
        "indices": [
          882,
          905
        ],
        "url": "https://t.co/RwyLKRHc4E"
      }
    ],
    "user_mentions": []
  },
  "quoted_tweet": {
    "type": "tweet",
    "id": "2034501346163073354",
    "url": "https://x.com/SakanaAILabs/status/2034501346163073354",
    "twitterUrl": "https://twitter.com/SakanaAILabs/status/2034501346163073354",
    "text": "銀行業務にAIエージェントを実装する\n\nhttps://t.co/kLVZDYkjex\n\n先日、Sakana AIと三菱UFJ銀行の「AI融資エキスパート」が、実案件での検証フェーズへと舵を切りました。プロジェクトの中心メンバー2名が、インタビュー形式でその技術的背景や取り組みの概要を語りました。",
    "source": "Twitter for iPhone",
    "retweetCount": 4,
    "replyCount": 1,
    "likeCount": 9,
    "quoteCount": 2,
    "viewCount": 1570,
    "createdAt": "Thu Mar 19 05:24:54 +0000 2026",
    "lang": "ja",
    "bookmarkCount": 0,
    "isReply": false,
    "inReplyToId": null,
    "conversationId": "2034501346163073354",
    "displayTextRange": [
      0,
      149
    ],
    "inReplyToUserId": null,
    "inReplyToUsername": null,
    "author": {
      "type": "user",
      "userName": "SakanaAILabs",
      "url": "https://x.com/SakanaAILabs",
      "twitterUrl": "https://twitter.com/SakanaAILabs",
      "id": "218811492",
      "name": "Sakana AI",
      "isVerified": false,
      "isBlueVerified": true,
      "verifiedType": "Business",
      "profilePicture": "https://pbs.twimg.com/profile_images/1885939209388929024/dtnrOdGp_normal.jpg",
      "coverPicture": "https://pbs.twimg.com/profile_banners/218811492/1686643464",
      "description": "",
      "location": "Tokyo, Japan",
      "followers": 63006,
      "following": 0,
      "status": "",
      "canDm": false,
      "canMediaTag": true,
      "createdAt": "Tue Nov 23 10:20:07 +0000 2010",
      "entities": {
        "description": {
          "urls": []
        },
        "url": {}
      },
      "fastFollowersCount": 0,
      "favouritesCount": 1,
      "hasCustomTimelines": true,
      "isTranslator": false,
      "mediaCount": 336,
      "statusesCount": 965,
      "withheldInCountries": [],
      "affiliatesHighlightedLabel": {},
      "possiblySensitive": false,
      "pinnedTweetIds": [
        "1823178623513239992"
      ],
      "profile_bio": {
        "description": "Sakana AI is an AI R&D company based in Tokyo. We want to develop AI solutions for Japan’s needs, and democratize AI in Japan. https://t.co/OWL1EpmWtn",
        "entities": {
          "description": {
            "hashtags": [],
            "symbols": [],
            "urls": [
              {
                "display_url": "sakana.ai/careers",
                "expanded_url": "http://sakana.ai/careers",
                "indices": [
                  127,
                  150
                ],
                "url": "https://t.co/OWL1EpmWtn"
              }
            ],
            "user_mentions": []
          },
          "url": {
            "urls": [
              {
                "display_url": "sakana.ai",
                "expanded_url": "https://sakana.ai/",
                "indices": [
                  0,
                  23
                ],
                "url": "https://t.co/1m2lSgnfB2"
              }
            ]
          }
        }
      },
      "isAutomated": false,
      "automatedBy": null
    },
    "extendedEntities": {
      "media": [
        {
          "display_url": "pic.twitter.com/ih3S423mkK",
          "expanded_url": "https://twitter.com/SakanaAILabs/status/2034501346163073354/photo/1",
          "ext_media_availability": {
            "status": "Available"
          },
          "features": {
            "large": {
              "faces": [
                {
                  "h": 103,
                  "w": 103,
                  "x": 853,
                  "y": 635
                },
                {
                  "h": 110,
                  "w": 110,
                  "x": 294,
                  "y": 641
                },
                {
                  "h": 423,
                  "w": 423,
                  "x": 1299,
                  "y": 371
                },
                {
                  "h": 478,
                  "w": 478,
                  "x": 1246,
                  "y": 172
                }
              ]
            },
            "orig": {
              "faces": [
                {
                  "h": 103,
                  "w": 103,
                  "x": 853,
                  "y": 635
                },
                {
                  "h": 110,
                  "w": 110,
                  "x": 294,
                  "y": 641
                },
                {
                  "h": 423,
                  "w": 423,
                  "x": 1299,
                  "y": 371
                },
                {
                  "h": 478,
                  "w": 478,
                  "x": 1246,
                  "y": 172
                }
              ]
            }
          },
          "id_str": "2034499463184896000",
          "indices": [
            150,
            173
          ],
          "media_key": "3_2034499463184896000",
          "media_results": {
            "id": "QXBpTWVkaWFSZXN1bHRzOgwAAQoAARw7/nuG29AACgACHDwAMfEaoUoAAA==",
            "result": {
              "__typename": "ApiMedia",
              "id": "QXBpTWVkaWE6DAABCgABHDv+e4bb0AAKAAIcPAAx8RqhSgAA",
              "media_key": "3_2034499463184896000"
            }
          },
          "media_url_https": "https://pbs.twimg.com/media/HDv-e4bb0AAqwve.jpg",
          "original_info": {
            "focus_rects": [
              {
                "h": 1075,
                "w": 1920,
                "x": 0,
                "y": 0
              },
              {
                "h": 1080,
                "w": 1080,
                "x": 0,
                "y": 0
              },
              {
                "h": 1080,
                "w": 947,
                "x": 55,
                "y": 0
              },
              {
                "h": 1080,
                "w": 540,
                "x": 258,
                "y": 0
              },
              {
                "h": 1080,
                "w": 1920,
                "x": 0,
                "y": 0
              }
            ],
            "height": 1080,
            "width": 1920
          },
          "sizes": {
            "large": {
              "h": 1080,
              "w": 1920
            }
          },
          "type": "photo",
          "url": "https://t.co/ih3S423mkK"
        }
      ]
    },
    "card": null,
    "place": {},
    "entities": {
      "hashtags": [],
      "symbols": [],
      "urls": [
        {
          "display_url": "sakana.ai/mufg-ai-lendin…",
          "expanded_url": "https://sakana.ai/mufg-ai-lending-interview/",
          "indices": [
            20,
            43
          ],
          "url": "https://t.co/kLVZDYkjex"
        }
      ],
      "user_mentions": []
    },
    "quoted_tweet": null,
    "retweeted_tweet": null,
    "isLimitedReply": false,
    "article": null
  },
  "retweeted_tweet": null,
  "isLimitedReply": false,
  "article": null
}