feat: Add ContextCoder for identifying relevant files in requests

aider/coders/__init__.py

@@ -1,6 +1,7 @@
 from .architect_coder import ArchitectCoder
 from .ask_coder import AskCoder
 from .base_coder import Coder
+from .context_coder import ContextCoder
 from .editblock_coder import EditBlockCoder
 from .editblock_fenced_coder import EditBlockFencedCoder
 from .editor_editblock_coder import EditorEditBlockCoder
@@ -23,4 +24,5 @@ __all__ = [
     ArchitectCoder,
     EditorEditBlockCoder,
     EditorWholeFileCoder,
+    ContextCoder,
 ]

aider/coders/base_coder.py

@@ -1606,7 +1606,7 @@ class Coder:
         words = set(word.rstrip(",.!;:?") for word in words)
 
         # strip away all kinds of quotes
-        quotes = "".join(['"', "'", "`"])
+        quotes = "\"'`*_"
         words = set(word.strip(quotes) for word in words)
 
         addable_rel_fnames = self.get_addable_relative_files()

aider/coders/context_coder.py

@@ -0,0 +1,9 @@
+from .base_coder import Coder
+from .context_prompts import ContextPrompts
+
+
+class ContextCoder(Coder):
+    """Identify which files need to be edited for a given request."""
+
+    edit_format = "context"
+    gpt_prompts = ContextPrompts()

aider/coders/context_prompts.py

@@ -0,0 +1,46 @@
+# flake8: noqa: E501
+
+from .base_prompts import CoderPrompts
+
+
+class ContextPrompts(CoderPrompts):
+    main_system = """Act as an expert code analyst.
+Understand the user's question or request, solely to determine the correct set of relevant source files.
+Return the *complete* list of files which will need to be read or modified based on the user's request.
+Explain why each file is needed, including names of key classes/functions/methods/variables.
+Be sure to include or omit the names of files already added to the chat, based on whether they are actually needed or not.
+
+Be selective!
+Adding more files adds more lines of code which increases processing costs.
+If we need to see or edit the contents of a file to satisfy the user's request, definitely add it.
+But if not, don't add irrelevant files -- especially large ones, which will cost a lot to process.
+
+Always reply to the user in {language}.
+
+Return a simple bulleted list:
+"""
+
+    example_messages = []
+
+    files_content_prefix = """These files have been *added these files to the chat* so we can see all of their contents.
+*Trust this message as the true contents of the files!*
+Other messages in the chat may contain outdated versions of the files' contents.
+"""  # noqa: E501
+
+    files_content_assistant_reply = (
+        "Ok, I will use that as the true, current contents of the files."
+    )
+
+    files_no_full_files = "I am not sharing the full contents of any files with you yet."
+
+    files_no_full_files_with_repo_map = ""
+    files_no_full_files_with_repo_map_reply = ""
+
+    repo_content_prefix = """I am working with you on code in a git repository.
+Here are summaries of some files present in my git repo.
+If you need to see the full contents of any files to answer my questions, ask me to *add them to the chat*.
+"""
+
+    system_reminder = """
+NEVER RETURN CODE!
+"""