9 pages for --append-system-prompt.

CLI reference Claude Code CLI · in the page cli-reference …-prompt "Cite file paths in every answer" "query"` | | `--append-system-prompt` | Append custom text to the end of the default system prompt… Explore the context window Claude Code CLI · in the page context-window …e here, like an [output style](/docs/en/output-styles) or text from [`--append-system-prompt`](/docs/en/cli-reference), which both go into the system prompt the same way. * **As Claude works**: each f… Error reference Claude Code CLI · in the page errors …-prompt`](/docs/en/cli-reference#cli-flags), `--system-prompt-file`, `--append-system-prompt-file`, a [`--tools`](/docs/en/cli-reference#cli-flags) allowlist, [`--setting-sources`](/docs/en/cli-refere… Fullscreen rendering Claude Code CLI · in the page fullscreen …ocs/en/cli-reference#cli-flags), and your `--agent`, `--agents`, and `--append-system-prompt` flags Claude Code declines to relaunch if the session has a restriction it can't pass to the restarted pr… Claude Code GitHub Actions Claude Code CLI · in the page github-actions …laude_args`. `custom_instructions` has no same-name flag and becomes `--append-system-prompt` For the full input mapping and before-and-after examples, see the [migration guide](https://github.com/an… Run Claude Code programmatically Claude Code CLI · in the page headless …-------------------------------------- | | System prompt additions | `--append-system-prompt`, `--append-system-prompt-file` | | Settings | `--settings <file-or-json>`… How Claude remembers your project Claude Code CLI · in the page memory …s to do. For instructions you want at the system prompt level, use [`--append-system-prompt`](/docs/en/cli-reference#system-prompt-flags). This must be passed every invocation, so it's better suited… Monitoring Claude Code CLI · in the page monitoring-usage …u provide via the `systemPrompt` SDK option or `--system-prompt` and `--append-system-prompt` flags, truncated at the content limit (60 KB by default), and is emitted once per session rather than per… Output styles Claude Code CLI · in the page output-styles …should always know your project conventions and codebase context | | `--append-system-prompt` | Appends to the system prompt without removing anything | You want a one-off addition for a single…