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Docs: added explanation on system prompt override for CC

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Michael Panchenko committed 2026-04-26 12:51:26 +02:00
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@@ -101,9 +101,29 @@ You can do this in Tools / GitHub Copilot / Chat, where at the bottom you can cl
## Claude Code
Serena is a great way to make Claude Code both cheaper and more powerful!
Serena is a great way to make Claude Code both more efficient and more powerful!
To add Serena to Claude Code, you can simply run `serena setup claude-code`. Alternatively, follow the instructions below.
:::{attention}
Recent updates to Claude Code (CC) and to the Opus line of models resulted in drastically poorer
adherence to instructions pertaining to Serena's tools.
After extensive analysis, we identified part of the reason to be very long and detailed
tool descriptions for inbuilt tools and parts of the default system prompt.
The descriptions of CC's system tools take almost 16k tokens, cannot be adjusted by the user,
and introduce a very strong bias towards internal tools, making it near impossible to convince Opus 4.7 to use Serena.
As a workaround, we crafted a system prompt that counteracts this bias.
When using Serena, we highly recommend that you start CC as
```shell
claude --system-prompt=$(serena cc-system-prompt-override)
```
You can also consider adding the content of `serena cc-system-prompt-override` to your `CLAUDE.md` files,
but the effect be insufficient for counteracting Claude Code's bias towards internal tools.
:::
**Global Configuration**. To add the Serena MCP server for all your projects, use the user-level configuration of claude code and the `--project-from-cwd` flag:
```shell