{"name":"CLAUDE_CODE_ADDITIONAL_PROTECTION","slug":"claude-code-additional-protection","family":"env","title":"Environment variables","noun":"environment variable","description":"When truthy (`1`, `true`, `yes` or `on`), Claude Code adds the header `x-anthropic-additional-protection: true` to the default headers of the Anthropic API clients it creates.","description_source":"code","described_by":{"bundle":"2.1.286","author":"claude-opus-5-5"},"presence":{"first_seen":"2.1.138","removed_in":null,"in_current_build":true,"newest_mined":"2.1.308","builds":149,"mined_builds":149,"first_cited":null},"aliases":[],"entries":[],"entries_total":0,"docs":[],"docs_total":0,"gates":[],"related":[{"name":"CLAUDE_CODE_ADDITIONAL_DIRECTORIES_CLAUDE_MD","slug":"claude-code-additional-directories-claude-md","description":"Set to `1` to load memory files from directories specified with `--add-dir`. Loads `CLAUDE.md`, `.claude\/CLAUDE.md`, `.claude\/rules\/*.md`, and `CLAUDE.local.md`. By default, additional directories do not load memory files"}],"url":"https:\/\/changelogs.core-directive.com\/reference\/env\/claude-code-additional-protection","family_url":"https:\/\/changelogs.core-directive.com\/reference\/env.json"}