apply changedcli-sdks-libraries/cli/apply
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1212
1313Write the agent as a Markdown file under `agents/` and apply it:
1414
15<MultiFileExample language="cli" label="CLI">
16 ```bash CLI
17 ant apply agents/summarizer.md
18 ```
15<CodeGroup>
16 <CodeGroupItem>
17 ```bash CLI
18 ant apply agents/summarizer.md
19 ```
1920
20 <File filename="agents/summarizer.md">
21 ```markdown
22 ---
23 name: Summarizer
24 model: claude-opus-5-5
25 tools:
26 - type: agent_toolset_20260401
27 ---
21 <File filename="agents/summarizer.md">
22 ```markdown
23 ---
24 name: Summarizer
25 model: claude-opus-5-5
26 tools:
27 - type: agent_toolset_20260401
28 ---
2829
29 You are a helpful assistant that writes concise summaries.
30 ```
31 </File>
32</MultiFileExample>
30 You are a helpful assistant that writes concise summaries.
31 ```
32 </File>
33 </CodeGroupItem>
34</CodeGroup>
3335
3436The frontmatter holds the agent's configuration (the fields from [Define your agent](https://platform.claude.com/docs/en/managed-agents/agent-setup)) and the body is its system prompt. `ant apply` [infers](https://platform.claude.com/docs/en/cli-sdks-libraries/cli/apply#kind-inference) that the file is an agent from its path, here the `agents/` directory.
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106108
107109Resources refer to each other by path. Wherever the API expects another resource's ID, write the relative path to that resource's file instead. In this project, the reviewer agent lists `../skills/pr-summary` under `skills`, the lead agent lists `./reviewer.md` in its roster, and the deployment names its agent, environment, and memory store by path. `ant apply` creates them in dependency order and fills in the real IDs. The project has six files:
108110
109<MultiFileExample variant="explorer">
111<FileExplorer>
110112 <File filename="agents/reviewer.md">
111113 ```markdown
112114 ---
from line 190
188190 Review any open pull requests. Start with the oldest.
189191 ```
190192 </File>
191</MultiFileExample>
193</FileExplorer>
192194
193195Apply the whole directory:
194196
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