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Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.251 Feeds RSS JSON llms.txt
Reading a new release v2.1.251 Analysing changes · 2/5 Deeper second pass · 0/5 agents 427 findings $12.75 so far

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

One change

results

api/messages/batches/results

first seen The page's own history The capture it came from

Nearest release: v2.1.238, published under an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

api/messages/batches/results Changed · +25 / -1 lines

from line 59
 
             The time at which the container will expire.
 
+          - `skills: array of ContainerSkill or null`
+
+            Skills loaded in the container
+
+            - `skill_id: string`
+
+              Skill ID
+
+            - `type: "anthropic" or "custom"`
+
+              Type of skill - either 'anthropic' (built-in) or 'custom' (user-defined)
+
+              - `"anthropic"`
+
+              - `"custom"`
+
+            - `version: string`
+
+              Skill version or 'latest' for most recent version
+
         - `content: array of ContentBlock`
 
           Content generated by the model.
from line 264
 
               - `"redacted_thinking"`
 
-          - `ToolUseBlock object { id, caller, input, 2 more }`
+          - `ToolUseBlock object { id, caller, input, 3 more }`
 
             - `id: string`
from line 305
             - `type: "tool_use"`
 
               - `"tool_use"`
+
+            - `toolset_name: optional string or null`
+
+              For a toolset member tool_use, the toolset family.
 
           - `ServerToolUseBlock object { id, caller, input, 2 more }`