fix: escaping in replace_in_file tool

lua/chatgpt_nvim/prompts.lua

@@ -292,6 +292,59 @@ local M = {
     - Never do write operations on a file which you have not read before. Its contents must be in your context before writing. This does not apply if you create a new file.
     - The plugin will verify the `project_name` is correct before running any tools.
     - If the response grows too large, I'll guide you to break it into smaller steps.
+
+    You are assisting me in a coding workflow for a project (e.g., "my_project"). 
+
+    1. **Gather Context / Ask Questions**  
+       - If you need more information or something is unclear, **ask me directly** in plain text, without calling any tools.
+
+    2. **Inspect Files**  
+       - When you need to check a file’s content, use:
+         ```yaml
+         project_name: "my_project"
+         tools:
+           - tool: "readFile"
+             path: "relative/path/to/file"
+         ```
+       - Read the file before deciding on any modifications.
+
+    3. **Make Changes**  
+       - If you need to modify an existing file (after reading it), use:
+         ```yaml
+         project_name: "my_project"
+         tools:
+           - tool: "editFile"
+             path: "relative/path/to/file"
+             content: |
+               # Full updated file content
+         ```
+       - Or perform incremental text replacements with:
+         ```yaml
+         project_name: "my_project"
+         tools:
+           - tool: "replace_in_file"
+             path: "relative/path/to/file"
+             replacements:
+               - search: "old text"
+                 replace: "new text"
+         ```
+
+    4. **Run Commands (Optional)**  
+       - To run tests, list files, or do other checks, use:
+         ```yaml
+         project_name: "my_project"
+         tools:
+           - tool: "executeCommand"
+             command: "shell command here"
+         ```
+
+    5. **Important Rules**  
+       - Always start with 1 or 2, but afterwards you can mix 1, 2, 3, and 4 as needed.
+       - Include `project_name: "my_project"` whenever you call `tools`.
+       - Keep each tool call in the `tools` array (multiple if needed).
+       - **Never write to a file you haven’t read** in this session (unless creating a new file).
+       - Follow secure coding guidelines (input validation, least privilege, no sensitive info in logs, etc.).
+       - When done, provide a final answer **without** calling any tools.
   ]],
   ["secure-coding"] = [[
     ### Secure Coding Guidelines

lua/chatgpt_nvim/tools/replace_in_file.lua

@@ -3,8 +3,11 @@ local robust_lsp = require("chatgpt_nvim.tools.lsp_robust_diagnostics")
 
 local M = {}
 
--- Enhanced search_and_replace to track if a string was found. We use Lua’s gsub return value 
+-- Function to escape all Lua pattern magic characters:
--- (updatedString, replacementCount) to see if any replacements occurred.
+local function escape_lua_pattern(s)
+  return s:gsub("([%^%$%(%)%%%.%[%]%*%+%-%?])", "%%%1")
+end
+
 local function search_and_replace(original, replacements)
   local updated = original
   local info_msgs = {}
@@ -13,8 +16,11 @@ local function search_and_replace(original, replacements)
     local search_str = r.search or ""
     local replace_str = r.replace or ""
 
+    -- Escape special pattern chars to ensure literal matching:
+    local escaped_search = escape_lua_pattern(search_str)
+
     local replacement_count = 0
-    updated, replacement_count = updated:gsub(search_str, replace_str)
+    updated, replacement_count = updated:gsub(escaped_search, replace_str)
 
     -- If the string was not found, append an info message
     if replacement_count == 0 then
@@ -41,8 +47,8 @@ M.run = function(tool_call, conf, prompt_user_tool_accept, is_subpath, read_file
   if not path or #replacements == 0 then
     return "[replace_in_file] Missing 'path' or 'replacements'."
   end
-  local root = vim.fn.getcwd()
 
+  local root = vim.fn.getcwd()
   if not is_subpath(root, path) then
     return string.format("Tool [replace_in_file for '%s'] REJECTED. Path outside project root.", path)
   end