@mitsuhiko
I don't use Claude's plan mode. I made some potentially uninformed statements today about plan mode, so I learned what it does by looking at the code. This might or might not be useful to you. https://t.co/18u74IrvFH
Viewing enriched Twitter post
I don't use Claude's plan mode. I made some potentially uninformed statements today about plan mode, so I learned what it does by looking at the code. This might or might not be useful to you. https://t.co/18u74IrvFH
{
"media": [
{
"url": "https://crmoxkoizveukayfjuyo.supabase.co/storage/v1/object/public/media/posts/2001393359424819509/media_0.jpg?",
"media_url": "https://crmoxkoizveukayfjuyo.supabase.co/storage/v1/object/public/media/posts/2001393359424819509/media_0.jpg?",
"type": "photo",
"filename": "media_0.jpg"
}
],
"processed_at": "2025-12-18T05:09:36.949659",
"pipeline_version": "2.0"
} {
"type": "tweet",
"id": "2001393359424819509",
"url": "https://x.com/mitsuhiko/status/2001393359424819509",
"twitterUrl": "https://twitter.com/mitsuhiko/status/2001393359424819509",
"text": "I don't use Claude's plan mode. I made some potentially uninformed statements today about plan mode, so I learned what it does by looking at the code. This might or might not be useful to you. https://t.co/18u74IrvFH",
"source": "Twitter for iPhone",
"retweetCount": 14,
"replyCount": 16,
"likeCount": 196,
"quoteCount": 4,
"viewCount": 29369,
"createdAt": "Wed Dec 17 20:45:35 +0000 2025",
"lang": "en",
"bookmarkCount": 269,
"isReply": false,
"inReplyToId": null,
"conversationId": "2001393359424819509",
"displayTextRange": [
0,
216
],
"inReplyToUserId": null,
"inReplyToUsername": null,
"author": {
"type": "user",
"userName": "mitsuhiko",
"url": "https://x.com/mitsuhiko",
"twitterUrl": "https://twitter.com/mitsuhiko",
"id": "12963432",
"name": "Armin Ronacher ⇌",
"isVerified": false,
"isBlueVerified": true,
"verifiedType": null,
"profilePicture": "https://pbs.twimg.com/profile_images/1905698833084174336/jcHMkWFA_normal.jpg",
"coverPicture": "https://pbs.twimg.com/profile_banners/12963432/1455078705",
"description": "",
"location": "Vienna, Austria",
"followers": 62624,
"following": 867,
"status": "",
"canDm": true,
"canMediaTag": true,
"createdAt": "Fri Feb 01 23:12:59 +0000 2008",
"entities": {
"description": {
"urls": []
},
"url": {}
},
"fastFollowersCount": 0,
"favouritesCount": 12346,
"hasCustomTimelines": true,
"isTranslator": false,
"mediaCount": 2862,
"statusesCount": 59316,
"withheldInCountries": [],
"affiliatesHighlightedLabel": {},
"possiblySensitive": false,
"pinnedTweetIds": [
"1992000898147766638"
],
"profile_bio": {
"description": "Creator of Flask; Building at https://t.co/uGuzfu0dVl — love API design & AI. Bypassing Permissions. Husband and father of 3 — “more nuanced in person”",
"entities": {
"description": {
"urls": [
{
"display_url": "earendil.com",
"expanded_url": "http://earendil.com",
"indices": [
30,
53
],
"url": "https://t.co/uGuzfu0dVl"
}
]
},
"url": {
"urls": [
{
"display_url": "ronacher.eu",
"expanded_url": "https://ronacher.eu",
"indices": [
0,
23
],
"url": "https://t.co/M9o7f19Pfh"
}
]
}
}
},
"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/2001393303464386560/GU2iccbw?format=jpg&name=800x419",
"width": 800
}
}
},
{
"key": "thumbnail_image",
"value": {
"image_value": {
"height": 147,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=jpg&name=280x150",
"width": 280
}
}
},
{
"key": "description",
"value": {
"string_value": "What I learned about plan mode as a non-plan mode user who plans."
}
},
{
"key": "domain",
"value": {
"string_value": "lucumr.pocoo.org"
}
},
{
"key": "thumbnail_image_large",
"value": {
"image_value": {
"height": 315,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=jpg&name=600x600",
"width": 600
}
}
},
{
"key": "summary_photo_image_small",
"value": {
"image_value": {
"height": 202,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=jpg&name=386x202",
"width": 386
}
}
},
{
"key": "thumbnail_image_original",
"value": {
"image_value": {
"height": 630,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=jpg&name=orig",
"width": 1200
}
}
},
{
"key": "site",
"value": {
"scribe_key": "publisher_id",
"user_value": {
"id_str": "12963432"
}
}
},
{
"key": "photo_image_full_size_small",
"value": {
"image_value": {
"height": 202,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=jpg&name=386x202",
"width": 386
}
}
},
{
"key": "summary_photo_image_large",
"value": {
"image_value": {
"height": 419,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=jpg&name=800x419",
"width": 800
}
}
},
{
"key": "thumbnail_image_small",
"value": {
"image_value": {
"height": 76,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=jpg&name=144x144",
"width": 144
}
}
},
{
"key": "creator",
"value": {
"user_value": {
"id_str": "12963432"
}
}
},
{
"key": "thumbnail_image_x_large",
"value": {
"image_value": {
"height": 630,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=png&name=2048x2048_2_exp",
"width": 1200
}
}
},
{
"key": "photo_image_full_size_original",
"value": {
"image_value": {
"height": 630,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=jpg&name=orig",
"width": 1200
}
}
},
{
"key": "vanity_url",
"value": {
"scribe_key": "vanity_url",
"string_value": "lucumr.pocoo.org"
}
},
{
"key": "photo_image_full_size",
"value": {
"image_value": {
"height": 314,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=jpg&name=600x314",
"width": 600
}
}
},
{
"key": "thumbnail_image_color",
"value": {
"image_color_value": {
"palette": [
{
"percentage": 98.2,
"rgb": {
"blue": 86,
"green": 49,
"red": 27
}
},
{
"percentage": 1.14,
"rgb": {
"blue": 163,
"green": 137,
"red": 121
}
},
{
"percentage": 0.34,
"rgb": {
"blue": 43,
"green": 49,
"red": 56
}
},
{
"percentage": 0.2,
"rgb": {
"blue": 31,
"green": 68,
"red": 48
}
}
]
}
}
},
{
"key": "title",
"value": {
"string_value": "What Actually Is Claude Code’s Plan Mode?"
}
},
{
"key": "summary_photo_image_color",
"value": {
"image_color_value": {
"palette": [
{
"percentage": 98.2,
"rgb": {
"blue": 86,
"green": 49,
"red": 27
}
},
{
"percentage": 1.14,
"rgb": {
"blue": 163,
"green": 137,
"red": 121
}
},
{
"percentage": 0.34,
"rgb": {
"blue": 43,
"green": 49,
"red": 56
}
},
{
"percentage": 0.2,
"rgb": {
"blue": 31,
"green": 68,
"red": 48
}
}
]
}
}
},
{
"key": "summary_photo_image_x_large",
"value": {
"image_value": {
"height": 630,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=png&name=2048x2048_2_exp",
"width": 1200
}
}
},
{
"key": "summary_photo_image",
"value": {
"image_value": {
"height": 314,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=jpg&name=600x314",
"width": 600
}
}
},
{
"key": "photo_image_full_size_color",
"value": {
"image_color_value": {
"palette": [
{
"percentage": 98.2,
"rgb": {
"blue": 86,
"green": 49,
"red": 27
}
},
{
"percentage": 1.14,
"rgb": {
"blue": 163,
"green": 137,
"red": 121
}
},
{
"percentage": 0.34,
"rgb": {
"blue": 43,
"green": 49,
"red": 56
}
},
{
"percentage": 0.2,
"rgb": {
"blue": 31,
"green": 68,
"red": 48
}
}
]
}
}
},
{
"key": "photo_image_full_size_x_large",
"value": {
"image_value": {
"height": 630,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=png&name=2048x2048_2_exp",
"width": 1200
}
}
},
{
"key": "card_url",
"value": {
"scribe_key": "card_url",
"string_value": "https://t.co/18u74IrvFH"
}
},
{
"key": "summary_photo_image_original",
"value": {
"image_value": {
"height": 630,
"url": "https://pbs.twimg.com/card_img/2001393303464386560/GU2iccbw?format=jpg&name=orig",
"width": 1200
}
}
}
],
"card_platform": {
"platform": {
"audience": {
"name": "production"
},
"device": {
"name": "iPhone",
"version": "13"
}
}
},
"name": "summary_large_image",
"url": "https://t.co/18u74IrvFH",
"user_refs_results": [
{
"rest_id": "12963432",
"result": {
"__typename": "User",
"action_counts": {
"favorites_count": 12346
},
"avatar": {
"image_url": "https://pbs.twimg.com/profile_images/1905698833084174336/jcHMkWFA_normal.jpg"
},
"banner": {
"image_url": "https://pbs.twimg.com/profile_banners/12963432/1455078705"
},
"core": {
"created_at": "Fri Feb 01 23:12:59 +0000 2008",
"name": "Armin Ronacher ⇌",
"screen_name": "mitsuhiko"
},
"dm_permissions": {
"can_dm": true
},
"exclusive_tweet_following": false,
"identity_profile_labels_highlighted_label": {},
"location": {
"location": "Vienna, Austria"
},
"media_permissions": {
"can_media_tag": true
},
"notifications_settings": {},
"pinned_items": {
"tweet_ids_str": [
"1992000898147766638"
]
},
"privacy": {},
"private_super_following": false,
"profile_bio": {
"description": "Creator of Flask; Building at https://t.co/uGuzfu0dVl — love API design & AI. Bypassing Permissions. Husband and father of 3 — “more nuanced in person”",
"entities": {
"description": {
"urls": [
{
"display_url": "earendil.com",
"expanded_url": "http://earendil.com",
"indices": [
30,
53
],
"url": "https://t.co/uGuzfu0dVl"
}
]
},
"url": {
"urls": [
{
"display_url": "ronacher.eu",
"expanded_url": "https://ronacher.eu",
"indices": [
0,
23
],
"url": "https://t.co/M9o7f19Pfh"
}
]
}
}
},
"profile_metadata": {
"profile_interstitial_type": "",
"profile_link_color": "FF691F"
},
"profile_translation": {
"translator_type_enum": "None"
},
"properties": {
"has_extended_profile": true
},
"relationship_counts": {
"followers": 62624,
"following": 867
},
"relationship_perspectives": {},
"rest_id": "12963432",
"super_follow_eligible": false,
"super_followed_by": false,
"super_following": false,
"tweet_counts": {
"media_tweets": 2862,
"tweets": 59316
},
"website": {
"url": "https://t.co/M9o7f19Pfh"
},
"verification": {
"is_blue_verified": true
}
}
},
{
"rest_id": "12963432",
"result": {
"__typename": "User",
"action_counts": {
"favorites_count": 12346
},
"avatar": {
"image_url": "https://pbs.twimg.com/profile_images/1905698833084174336/jcHMkWFA_normal.jpg"
},
"banner": {
"image_url": "https://pbs.twimg.com/profile_banners/12963432/1455078705"
},
"core": {
"created_at": "Fri Feb 01 23:12:59 +0000 2008",
"name": "Armin Ronacher ⇌",
"screen_name": "mitsuhiko"
},
"dm_permissions": {
"can_dm": true
},
"exclusive_tweet_following": false,
"identity_profile_labels_highlighted_label": {},
"location": {
"location": "Vienna, Austria"
},
"media_permissions": {
"can_media_tag": true
},
"notifications_settings": {},
"pinned_items": {
"tweet_ids_str": [
"1992000898147766638"
]
},
"privacy": {},
"private_super_following": false,
"profile_bio": {
"description": "Creator of Flask; Building at https://t.co/uGuzfu0dVl — love API design & AI. Bypassing Permissions. Husband and father of 3 — “more nuanced in person”",
"entities": {
"description": {
"urls": [
{
"display_url": "earendil.com",
"expanded_url": "http://earendil.com",
"indices": [
30,
53
],
"url": "https://t.co/uGuzfu0dVl"
}
]
},
"url": {
"urls": [
{
"display_url": "ronacher.eu",
"expanded_url": "https://ronacher.eu",
"indices": [
0,
23
],
"url": "https://t.co/M9o7f19Pfh"
}
]
}
}
},
"profile_metadata": {
"profile_interstitial_type": "",
"profile_link_color": "FF691F"
},
"profile_translation": {
"translator_type_enum": "None"
},
"properties": {
"has_extended_profile": true
},
"relationship_counts": {
"followers": 62624,
"following": 867
},
"relationship_perspectives": {},
"rest_id": "12963432",
"super_follow_eligible": false,
"super_followed_by": false,
"super_following": false,
"tweet_counts": {
"media_tweets": 2862,
"tweets": 59316
},
"website": {
"url": "https://t.co/M9o7f19Pfh"
},
"verification": {
"is_blue_verified": true
}
}
}
]
},
"place": {},
"entities": {
"urls": [
{
"display_url": "lucumr.pocoo.org/2025/12/17/wha…",
"expanded_url": "https://lucumr.pocoo.org/2025/12/17/what-is-plan-mode/",
"indices": [
193,
216
],
"url": "https://t.co/18u74IrvFH"
}
]
},
"quoted_tweet": null,
"retweeted_tweet": null,
"isLimitedReply": false,
"article": null
}