{
  "type": "tweet",
  "id": "2003541373853524347",
  "url": "https://x.com/YuxiangWei9/status/2003541373853524347",
  "twitterUrl": "https://twitter.com/YuxiangWei9/status/2003541373853524347",
  "text": "Software agents can self-improve via self-play RL\n\nIntroducing Self-play SWE-RL (SSR): training a single LLM agent to self-play between bug-injection and bug-repair, grounded in real-world repositories, no human-labeled issues or tests. 🧵",
  "source": "Twitter for iPhone",
  "retweetCount": 285,
  "replyCount": 61,
  "likeCount": 1683,
  "quoteCount": 49,
  "viewCount": 474844,
  "createdAt": "Tue Dec 23 19:01:02 +0000 2025",
  "lang": "en",
  "bookmarkCount": 1480,
  "isReply": false,
  "inReplyToId": null,
  "conversationId": "2003541373853524347",
  "displayTextRange": [
    0,
    262
  ],
  "inReplyToUserId": null,
  "inReplyToUsername": null,
  "author": {
    "type": "user",
    "userName": "YuxiangWei9",
    "url": "https://x.com/YuxiangWei9",
    "twitterUrl": "https://twitter.com/YuxiangWei9",
    "id": "1449574367076110338",
    "name": "Yuxiang Wei",
    "isVerified": false,
    "isBlueVerified": true,
    "verifiedType": null,
    "profilePicture": "https://pbs.twimg.com/profile_images/1558989420878897152/KEqmGV7Y_normal.jpg",
    "coverPicture": "https://pbs.twimg.com/profile_banners/1449574367076110338/1676437656",
    "description": "",
    "location": "Champaign, IL",
    "followers": 2202,
    "following": 348,
    "status": "",
    "canDm": false,
    "canMediaTag": true,
    "createdAt": "Sun Oct 17 03:14:18 +0000 2021",
    "entities": {
      "description": {
        "urls": []
      },
      "url": {}
    },
    "fastFollowersCount": 0,
    "favouritesCount": 988,
    "hasCustomTimelines": true,
    "isTranslator": false,
    "mediaCount": 26,
    "statusesCount": 136,
    "withheldInCountries": [],
    "affiliatesHighlightedLabel": {},
    "possiblySensitive": false,
    "pinnedTweetIds": [
      "2003541373853524347"
    ],
    "profile_bio": {
      "description": "PhD candidate @IllinoisCDS | prev research @AIatMeta @Snowflake | training code agents",
      "entities": {
        "description": {
          "user_mentions": [
            {
              "id_str": "0",
              "indices": [
                14,
                26
              ],
              "name": "",
              "screen_name": "IllinoisCDS"
            },
            {
              "id_str": "0",
              "indices": [
                43,
                52
              ],
              "name": "",
              "screen_name": "AIatMeta"
            },
            {
              "id_str": "0",
              "indices": [
                53,
                63
              ],
              "name": "",
              "screen_name": "Snowflake"
            }
          ]
        },
        "url": {
          "urls": [
            {
              "display_url": "yuxiang.cs.illinois.edu",
              "expanded_url": "https://yuxiang.cs.illinois.edu",
              "indices": [
                0,
                23
              ],
              "url": "https://t.co/glvq72x8ez"
            }
          ]
        }
      }
    },
    "isAutomated": false,
    "automatedBy": null
  },
  "extendedEntities": {
    "media": [
      {
        "allow_download_status": {
          "allow_download": true
        },
        "display_url": "pic.twitter.com/cAf0gK5vx6",
        "expanded_url": "https://twitter.com/YuxiangWei9/status/2003541373853524347/photo/1",
        "ext_media_availability": {
          "status": "Available"
        },
        "features": {
          "large": {},
          "orig": {}
        },
        "id_str": "2003541368937832448",
        "indices": [
          263,
          286
        ],
        "media_key": "3_2003541368937832448",
        "media_results": {
          "id": "QXBpTWVkaWFSZXN1bHRzOgwAAQoAARvOAkKEVuAACgACG84CQ6lWYXsAAA==",
          "result": {
            "__typename": "ApiMedia",
            "id": "QXBpTWVkaWE6DAABCgABG84CQoRW4AAKAAIbzgJDqVZhewAA",
            "media_key": "3_2003541368937832448"
          }
        },
        "media_url_https": "https://pbs.twimg.com/media/G84CQoRW4AAwjQu.jpg",
        "original_info": {
          "focus_rects": [
            {
              "h": 512,
              "w": 915,
              "x": 0,
              "y": 0
            },
            {
              "h": 915,
              "w": 915,
              "x": 0,
              "y": 0
            },
            {
              "h": 1043,
              "w": 915,
              "x": 0,
              "y": 0
            },
            {
              "h": 1200,
              "w": 600,
              "x": 0,
              "y": 0
            },
            {
              "h": 1200,
              "w": 915,
              "x": 0,
              "y": 0
            }
          ],
          "height": 1200,
          "width": 915
        },
        "sizes": {
          "large": {
            "h": 1200,
            "w": 915
          }
        },
        "type": "photo",
        "url": "https://t.co/cAf0gK5vx6"
      }
    ]
  },
  "card": null,
  "place": {},
  "entities": {},
  "quoted_tweet": null,
  "retweeted_tweet": null,
  "isLimitedReply": false,
  "article": null
}