Source Intelligence
Sweep 28 Aug 2026 ยท 16:06Z Build v2.1.251 479 read Stable v2.1.236 Latest v2.1.251 Next v2.1.251 Feeds RSS JSON llms.txt

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.

Prompt capture

Skill tool description

27 model strings share this prompt, byte for byte.

v2.1.156 19 lines 1315 chars sha256 6cb68f017c15 Plain text Whole capture

1Execute a skill within the main conversation
3When users ask you to perform tasks, check if any of the available skills match. Skills provide specialized capabilities and domain knowledge.
5When users reference a "slash command" or "/<something>", they are referring to a skill. Use this tool to invoke it.
7How to invoke:
8- Set `skill` to the exact name of an available skill (no leading slash). For plugin-namespaced skills use the fully qualified `plugin:skill` form.
9- Set `args` to pass optional arguments.
11Important:
12- Available skills are listed in system-reminder messages in the conversation
13- Only invoke a skill that appears in that list, or one the user explicitly typed as `/<name>` in their message. Never guess or invent a skill name from training data; otherwise do not call this tool
14- When a skill matches the user's request, this is a BLOCKING REQUIREMENT: invoke the relevant Skill tool BEFORE generating any other response about the task
15- NEVER mention a skill without actually calling this tool
16- Do not invoke a skill that is already running
17- Do not use this tool for built-in CLI commands (like /help, /clear, etc.)
18- If you see a <command-name> tag in the current conversation turn, the skill has ALREADY been loaded - follow the instructions directly instead of calling this tool again