[FEATURE]: Inject content to system prompt via CLI flag

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Describe the enhancement you want to request

When invoking a single run agent, I would like to be able to dynamically add content to the system prompt. This is useful to ensure aligned behavior that would persist past compaction. This would allow third party tools to better use opencode in this way too, if they don't want to use the SDK integration.

This issue might be a duplicate of existing issues. Please check:

Dynamic system prompts for custom agents #3195: Dynamic system prompts for custom agents (same core request: dynamically inject content into system prompt before agent runs)
[FEATURE]: Add systemPrompt option to SDK like Claude Agent SDK #7351: Add systemPrompt option to SDK (overlapping request for programmatic system prompt customization)
add optional system prompt environment injection #1894: Add optional system prompt environment injection (related: controlling what gets added to the system prompt)

If your use case is distinct (specifically the CLI flag for single-run mode), please clarify how it differs from the above.

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[FEATURE]: Inject content to system prompt via CLI flag #16089

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[FEATURE]: Inject content to system prompt via CLI flag #16089

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Feature hasn't been suggested before.

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github-actions commented on Mar 5, 2026

github-actions commented on Jul 5, 2026

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