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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Code CLI 28 Sep 2026
One change · claude-code

Extend Claude with skills changedskills

Nearest release: v2.1.284, published 6 hours before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Upstream edited this page at 28 Sep 2026 23:53 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 29 Sep 2026 00:07 UTC.

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First seen 14 Aug 2026 this site's first read of the page
Recorded edits80to this page, all time

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420420| `$N` | Shorthand for `$ARGUMENTS[N]`, such as `$0` for the first argument or `$1` for the second. |
421421| `$name` | Named argument declared in the [`arguments`](#frontmatter-reference) frontmatter list. Names map to positions in order, so with `arguments: [issue, branch]` the placeholder `$issue` expands to the first argument and `$branch` to the second. |
422422| `${CLAUDE_SESSION_ID}` | The current session ID. Useful for logging, creating session-specific files, or correlating skill output with sessions. |
423| `${CLAUDE_EFFORT}` | The current effort level: `low`, `medium`, `high`, `xhigh`, or `max`. Ultracode is not a distinct level and reports as `xhigh`. Use this to adapt skill instructions to the active effort setting. |
423| `${CLAUDE_EFFORT}` | The current effort level: `low`, `medium`, `high`, `xhigh`, or `max`. Use this to adapt skill instructions to the active effort setting. |
424424| `${CLAUDE_SKILL_DIR}` | The directory containing the skill's `SKILL.md` file. For plugin skills, this is the skill's subdirectory within the plugin, not the plugin root. Use this in bash injection commands to reference scripts or files bundled with the skill, regardless of the current working directory. |
425425| `${CLAUDE_PROJECT_DIR}` | The project root directory. This is the same path [hooks](/docs/en/hooks#reference-scripts-by-path) and MCP servers receive as `CLAUDE_PROJECT_DIR`. Use this to reference project-local scripts or files, such as `${CLAUDE_PROJECT_DIR}/.claude/hooks/helper.sh`, independent of where the skill is installed. |
426426| `${CLAUDE_PLUGIN_ROOT}` | The plugin's installation directory. Substituted only in plugin skills. Use this to reference scripts or files bundled anywhere in the plugin, including resources shared between the plugin's skills. See [plugin environment variables](/docs/en/plugins/manifest-reference#environment-variables). |
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