feat: add default prompt blocks and the possibility to specify them in the config

lua/chatgpt_nvim/config.lua

@@ -2,6 +2,7 @@
 -- Modified to:
 -- 1) Determine the Git root based on the currently opened file.
 -- 2) If no file is open or not in Git repo, fallback to current working directory.
+-- 3) Add support for configuring a list of default prompt blocks ("go-development", "typo3-development", "basic-prompt") that can override the initial prompt if provided.
 
 local M = {}
 local uv = vim.loop
@@ -25,7 +26,6 @@ local function get_project_root()
       root_dir = vim.fn.getcwd()
     else
       -- Attempt to find git root from the file's directory
-      -- We run git rev-parse with `cd` to the file's directory.
       local cmd = string.format("cd %s && git rev-parse --show-toplevel 2>/dev/null", vim.fn.shellescape(file_dir))
       local git_root = vim.fn.systemlist(cmd)
       if vim.v.shell_error == 0 and git_root and #git_root > 0 then
@@ -45,34 +45,58 @@ local function get_config_path()
   return root .. "/.chatgpt_config.yaml"
 end
 
+local prompt_blocks = {
+  ["go-development"] = "You are a coding assistant specialized in Go development. You will receive a project’s context and user instructions related to Go code, and you must return the requested modifications or guidance. When returning modifications, follow the specified YAML structure. Keep your suggestions aligned with Go best practices and idiomatic Go.",
+  ["typo3-development"] = "You are a coding assistant specialized in TYPO3 development. You have access to the project’s context and the user’s instructions. Your answers should focus on TYPO3 coding guidelines, extension development best practices, and TSconfig or TypoScript recommendations. When returning modifications, follow the YAML structure given.",
+  ["basic-prompt"] = "You are a coding assistant who receives a project’s context and user instructions. The user will provide a prompt, and you will return modifications to the project in a YAML structure. The YAML must have a top-level key named files, which should be a list of file changes. Each element in files must be a mapping with the keys path and content. The path should be the file path relative to the project’s root directory, and content should contain the new file content as a multiline string. Do not include additional commentary outside of the YAML."
+}
+
 function M.load()
   local path = get_config_path()
   local fd = uv.fs_open(path, "r", 438)
-  if not fd then
+  local config = {
-    return {
     initial_prompt = "",
     directories = { "." },
+    default_prompt_blocks = {}
   }
-  end
+
+  if fd then
     local stat = uv.fs_fstat(fd)
     local data = uv.fs_read(fd, stat.size, 0)
     uv.fs_close(fd)
     if data and ok_yaml then
       local ok, result = pcall(lyaml.load, data)
       if ok and type(result) == "table" then
-      local config = result
+        if type(result.initial_prompt) == "string" then
-      if type(config) == "table" then
+          config.initial_prompt = result.initial_prompt
-        return {
+        end
-          initial_prompt = config.initial_prompt or "",
+        if type(result.directories) == "table" then
-          directories = config.directories or { "." },
+          config.directories = result.directories
-        }
+        end
+        if type(result.default_prompt_blocks) == "table" then
+          config.default_prompt_blocks = result.default_prompt_blocks
         end
       end
     end
-  return {
+  else
-    initial_prompt = "You are a coding assistant who receives a project’s context and user instructions. The user will provide a prompt, and you will return modifications to the project in a YAML structure. This YAML must have a top-level key named files, which should be a list of file changes. Each element in files must be a mapping with the keys path and content. The path should be the file path relative to the project’s root directory, and content should contain the new file content as a multiline string (using the YAML | literal style). Do not include additional commentary outside of the YAML.\n  Here is the structure expected in your final answer:\n    files:\n      - path: \"relative/path/to/file1.ext\"\n        content: |\n          <full file content here>\n      - path: \"relative/path/to/file2.ext\"\n        content: |\n          <full file content here>\n  Based on the prompt and project context provided, you must only return the YAML structure shown above (with actual file paths and contents substituted in). Any file that should be created or modified must appear as one of the files entries. The content should contain the complete and final code for that file, reflecting all changes requested by the user.",
+    -- Default fallback configuration
-    directories = { "." },
+    config.initial_prompt = "You are a coding assistant who receives a project’s context and user instructions. The user will provide a prompt, and you will return modifications to the project in a YAML structure. This YAML must have a top-level key named files, which should be a list of file changes. Each element in files must be a mapping with the keys path and content. The path should be the file path relative to the project’s root directory, and content should contain the new file content as a multiline string (using the YAML | literal style). Do not include additional commentary outside of the YAML.\n  Here is the structure expected in your final answer:\n    files:\n      - path: \"relative/path/to/file1.ext\"\n        content: |\n          <full file content here>\n      - path: \"relative/path/to/file2.ext\"\n        content: |\n          <full file content here>\n  Based on the prompt and project context provided, you must only return the YAML structure shown above (with actual file paths and contents substituted in). Any file that should be created or modified must appear as one of the files entries. The content should contain the complete and final code for that file, reflecting all changes requested by the user."
-  }
+  end
+
+  -- If default_prompt_blocks are specified, concatenate all matching prompts
+  if type(config.default_prompt_blocks) == "table" and #config.default_prompt_blocks > 0 then
+    local merged_prompt = {}
+    for _, block_name in ipairs(config.default_prompt_blocks) do
+      if prompt_blocks[block_name] then
+        table.insert(merged_prompt, prompt_blocks[block_name])
+      end
+    end
+    if #merged_prompt > 0 then
+      config.initial_prompt = table.concat(merged_prompt, "\n\n")
+    end
+  end
+
+  return config
 end
 
 return M