feat: carry recently viewed files as context (#1538)

lua/avante/templates/_context.avanterules

@@ -23,3 +23,11 @@
 </content>
 </selected_code>
 {%- endif %}
+
+{% if recently_viewed_files -%}
+<recently_viewed_files>
+{%- for file in recently_viewed_files %}
+{{loop.index}}. {{file}}
+{%- endfor %}
+</recently_viewed_files>
+{%- endif %}

lua/avante/templates/_tools-guidelines.avanterules

@@ -5,6 +5,7 @@ Tools Usage Guide:
   - Please DON'T be so aggressive in using tools, as many tasks can be better completed without tools.
   - Files will be provided to you as context through <selected_files> tag!
   - Before using the `read_file` tool each time, always repeatedly check whether the file is already in the <selected_files> tag. If it is already there, do not use the `read_file` tool, just read the file content directly from the <selected_files> tag.
+  - If you use the `read_file` tool when file content is already provided in the <selected_files> tag, you will be fired!
   - If the `rag_search` tool exists, prioritize using it to do the search!
   - If the `rag_search` tool exists, only use tools like `search_keyword` `search_files` `read_file` `list_files` etc when absolutely necessary!
   - Keep the `query` parameter of `rag_search` tool as concise as possible! Try to keep it within five English words!