* Add Claude Opus 5 system prompt
Adds a minimal Opus 5 prompt behind `chat.claudeOpus5Prompt.enabled`,
following Anthropic's guidance for the Claude 5 generation: describe the
environment as facts rather than rules, put the behavioral weight into
scope and correction guidance, and drop the rule lists the model now
handles with its own judgement. Off by default, falling back to the
Claude 4.6 Opus prompt.
Also:
- Remove the Opus 4.8 and Sonnet 5 prompts and their settings. Both
models now use the Claude 4.6 prompts.
- Add comment-etiquette guidance to the shared optimized reminder, so it
reaches every Claude 4.6+ family rather than a single prompt.
- Enable tool search for claude-opus-5.
* Reword Opus 5 prompt to remove borrowed phrasing
The prompt had picked up wording from a reference system prompt during
drafting. Rewrites every affected passage in original wording, keeping
the guidance intact. Verified no shared word sequence of five or more
remains between the branch's added lines and that reference.
Bhavya U
a7fa33e78a