Move per-request web_search withholding out of the DeepSeek provider:
- dsh-web: add the optional WebSearchProvider.ready(llmProvider) and
ctx.web.searchReady(llmProvider?), which asks only the provider that
search() would select; a provider without ready() and a selection
failure answer true.
- dsh-web-search-deepseek: implement ready() with the existing credential
check and drop the assemble listener together with its system-prompt,
tools, and tool-web dependencies.
- dsh-tool-web: remove web_search and its tool:web_search section in a
prepended system-prompt/assemble listener when searchReady() answers
false for the route model selection assigned to the request.
A composition that selects another search provider no longer loses
web_search when DeepSeek has no credential. The Agent Note is renamed to
2026-09-27-web-search-offered-by-provider-readiness and records the split.
Yichen Jiang
7524c1ecd9