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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.

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8 pages for sandbox.credentials.

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Use Claude Code features in the SDK Claude Code CLI · in the page agent-sdk/claude-code-features …or `ENABLE_CLAUDEAI_MCP_SERVERS=false` in `env` | | [`sandbox.credentials`](/docs/en/sandboxing#protect-credentials) `deny` entries and file `mask` entries in `~/.claude/settings.json`… Claude Code changelog Claude Code CLI · in the page changelog …ate> <Update label="2.1.187" description="June 23, 2026"> * Added `sandbox.credentials` setting to block sandboxed commands from reading credential files and secret environment variables * Added… Claude apps gateway for Amazon Bedrock, Claude Platform on AWS, Google Cloud, and Microsoft Foundry Claude Code CLI · in the page claude-apps-gateway …missions#manage-permissions). Claude Code forwards parent-supplied [`sandbox.credentials`](/docs/en/settings-reference#sandbox-credentials) entries in stripped form: * **`deny` entries**: forwarded… Deploy managed settings Claude Code CLI · in the page managed-settings …| | `sandbox.credentials` | A recoverable invalid entry is degraded to `mode: "deny"` with a warning; an unrecoverable one is s… Configure the sandboxed Bash tool Claude Code CLI · in the page sandboxing …managed settings configure `sandbox.filesystem` at all, or list any `sandbox.credentials.files` entry with `"mode": "deny"`, only managed settings can set the key. This keeps administrator-deployed f… Claude Code settings Claude Code CLI · in the page settings …| | `sandbox.credentials` | An invalid entry in `files` or `envVars` that still has a valid `path` or `name` and a `mode` of `m… Claude Code settings reference Claude Code CLI · in the page settings-reference …| Sandbox settings | Managed | | [`sandbox.credentials`](#sandbox-credentials) | Hide or mask credential files and… Week 26 · June 22–26, 2026 Claude Code CLI · in the page whats-new/2026-w26 …tion from before <code>/clear</code> was run</div> <div>New <code>sandbox.credentials</code> setting blocks sandboxed commands from reading credential files and secret environment variables</div>…