feat: customizable slash_command, tool and variable prefixes

doc/codecompanion.txt

@@ -1,4 +1,4 @@
-*codecompanion.txt*        For NVIM v0.11        Last change: 2026 February 01
+*codecompanion.txt*        For NVIM v0.11        Last change: 2026 February 02
 
 ==============================================================================
 Table of Contents                            *codecompanion-table-of-contents*
@@ -1593,6 +1593,50 @@ See the section on |codecompanion-configuration-adapters-acp| and
 |codecompanion-configuration-adapters-http| for more information.
 
 
+COMPLETION ~
+
+By default, CodeCompanion will determine if you have one of blink.cmp
+<https://github.com/saghen/blink.cmp>, nvim-cmp
+<https://github.com/hrsh7th/nvim-cmp>, or coc.nvim
+<https://github.com/neoclide/coc.nvim> installed, selecting it as the default
+provider. Failing this, the default completion engine will be used.
+
+You can override this with:
+
+>lua
+    require("codecompanion").setup({
+      interactions = {
+        chat = {
+          opts = {
+            completion_provider = "blink", -- blink|cmp|coc|default
+          }
+        }
+      }
+    })
+<
+
+
+PREFIXES
+
+You can also customize the prefixes that trigger completions for
+|codecompanion-usage-chat-buffer-slash-commands|,
+|codecompanion-usage-chat-buffer-tools| and
+|codecompanion-usage-chat-buffer-variables|:
+
+>lua
+    require("codecompanion").setup({
+      opts = {
+        triggers = {
+          acp_slash_commands = "\\",
+          slash_commands = "/",
+          tools = "@",
+          variables = "#",
+        },
+      },
+    })
+<
+
+
 DIFF ~
 
 
@@ -1664,8 +1708,8 @@ SLASH COMMANDS ~
   file
 Slash Commands
 <https://github.com/olimorris/codecompanion.nvim/blob/main/lua/codecompanion/config.lua#L114>
-(invoked with `/`) let you dynamically insert context into the chat buffer,
-such as file contents or date/time.
+(invoked with `/` by default) let you dynamically insert context into the chat
+buffer, such as file contents or date/time.
 
 The plugin supports providers like telescope
 <https://github.com/nvim-telescope/telescope.nvim>, mini_pick
@@ -1689,7 +1733,7 @@ Tools
 <https://github.com/olimorris/codecompanion.nvim/blob/main/lua/codecompanion/config.lua#L55>
 perform specific tasks (e.g., running shell commands, editing buffers, etc.)
 when invoked by an LLM. Multiple tools can be grouped together. Both can be
-referenced with `@` when in the chat buffer:
+referenced with `@` (by default), when in the chat buffer:
 
 >lua
     require("codecompanion").setup({
@@ -1931,10 +1975,10 @@ VARIABLES ~
 
 Variables
 <https://github.com/olimorris/codecompanion.nvim/blob/main/lua/codecompanion/config.lua#L90>
-are placeholders inserted into the chat buffer (using `#`). They provide
-contextual code or information about the current Neovim state. For instance,
-the built-in `#buffer` variable sends the current buffer’s contents to the
-LLM.
+are placeholders inserted into the chat buffer (using `#` by default). They
+provide contextual code or information about the current Neovim state. For
+instance, the built-in `#{buffer}` variable sends the current buffer’s
+contents to the LLM.
 
 You can even define your own variables to share specific content:
 

doc/configuration/chat-buffer.md

@@ -27,6 +27,41 @@ require("codecompanion").setup({
 
 See the section on [ACP](/configuration/adapters-acp) and [HTTP](/configuration/adapters-http) for more information.
 
+## Completion
+
+By default, CodeCompanion will determine if you have one of [blink.cmp](https://github.com/saghen/blink.cmp), [nvim-cmp](https://github.com/hrsh7th/nvim-cmp), or [coc.nvim](https://github.com/neoclide/coc.nvim) installed, selecting it as the default provider. Failing this, the default completion engine will be used.
+
+You can override this with:
+
+```lua
+require("codecompanion").setup({
+  interactions = {
+    chat = {
+      opts = {
+        completion_provider = "blink", -- blink|cmp|coc|default
+      }
+    }
+  }
+})
+```
+
+### Prefixes
+
+You can also customize the prefixes that trigger completions for [slash commands](/usage/chat-buffer/slash-commands), [tools](/usage/chat-buffer/tools) and [variables](/usage/chat-buffer/variables):
+
+```lua
+require("codecompanion").setup({
+  opts = {
+    triggers = {
+      acp_slash_commands = "\\",
+      slash_commands = "/",
+      tools = "@",
+      variables = "#",
+    },
+  },
+})
+```
+
 ## Diff
 
 <img src="https://github.com/user-attachments/assets/8d80ed10-12f2-4c0b-915f-63b70797a6ca" alt="Diff"/>
@@ -193,7 +228,7 @@ The decorator function also has access to the adapter in the chat buffer alongsi
 > [!IMPORTANT]
 > Each slash command may have their own unique configuration so be sure to check out the [config.lua](https://github.com/olimorris/codecompanion.nvim/blob/main/lua/codecompanion/config.lua) file
 
-[Slash Commands](https://github.com/olimorris/codecompanion.nvim/blob/main/lua/codecompanion/config.lua#L114) (invoked with `/`) let you dynamically insert context into the chat buffer, such as file contents or date/time.
+[Slash Commands](https://github.com/olimorris/codecompanion.nvim/blob/main/lua/codecompanion/config.lua#L114) (invoked with `/` by default) let you dynamically insert context into the chat buffer, such as file contents or date/time.
 
 The plugin supports providers like [telescope](https://github.com/nvim-telescope/telescope.nvim), [mini_pick](https://github.com/echasnovski/mini.pick), [fzf_lua](https://github.com/ibhagwan/fzf-lua) and [snacks.nvim](https://github.com/folke/snacks.nvim). By default, the plugin will automatically detect if you have any of those plugins installed and duly set them as the default provider. Failing that, the in-built `default` provider will be used. Please see the [Chat Buffer](/usage/chat-buffer/index) usage section for information on how to use Slash Commands.
 
@@ -287,7 +322,7 @@ Credit to [@lazymaniac](https://github.com/lazymaniac) for the [inspiration](htt
 
 ## Tools
 
-[Tools](https://github.com/olimorris/codecompanion.nvim/blob/main/lua/codecompanion/config.lua#L55) perform specific tasks (e.g., running shell commands, editing buffers, etc.) when invoked by an LLM. Multiple tools can be grouped together. Both can be referenced with `@` when in the chat buffer:
+[Tools](https://github.com/olimorris/codecompanion.nvim/blob/main/lua/codecompanion/config.lua#L55) perform specific tasks (e.g., running shell commands, editing buffers, etc.) when invoked by an LLM. Multiple tools can be grouped together. Both can be referenced with `@` (by default), when in the chat buffer:
 
 ```lua
 require("codecompanion").setup({
@@ -676,7 +711,7 @@ require("codecompanion").setup({
 
 ## Variables
 
-[Variables](https://github.com/olimorris/codecompanion.nvim/blob/main/lua/codecompanion/config.lua#L90) are placeholders inserted into the chat buffer (using `#`). They provide contextual code or information about the current Neovim state. For instance, the built-in `#buffer` variable sends the current buffer’s contents to the LLM.
+[Variables](https://github.com/olimorris/codecompanion.nvim/blob/main/lua/codecompanion/config.lua#L90) are placeholders inserted into the chat buffer (using `#` by default). They provide contextual code or information about the current Neovim state. For instance, the built-in `#{buffer}` variable sends the current buffer’s contents to the LLM.
 
 You can even define your own variables to share specific content:
 

lua/codecompanion/commands/init.lua

@@ -8,6 +8,7 @@
 
 local codecompanion = require("codecompanion")
 local config = require("codecompanion.config")
+local triggers = require("codecompanion.triggers")
 
 local _cached_adapters = nil
 
@@ -40,7 +41,7 @@ return {
     cmd = "CodeCompanion",
     callback = function(opts)
       -- Detect the user calling a prompt from the prompt library
-      if opts.fargs[1] and string.sub(opts.fargs[1], 1, 1) == "/" then
+      if opts.fargs[1] and string.sub(opts.fargs[1], 1, 1) == triggers.mappings.slash_commands then
         -- Get the prompt minus the slash
         local prompt = string.sub(opts.fargs[1], 2)
 
@@ -103,13 +104,13 @@ return {
 
         -- Add prompt library items
         vim.iter(prompt_aliases):each(function(k)
-          table.insert(completions, "/" .. k)
+          table.insert(completions, triggers.mappings.slash_commands .. k)
         end)
 
         -- Add inline variables
         for key, _ in pairs(config.interactions.inline.variables) do
           if key ~= "opts" then
-            table.insert(completions, "#{" .. key .. "}")
+            table.insert(completions, string.format("%s{" .. key .. "}", triggers.mappings.variables))
           end
         end
 

lua/codecompanion/config.lua

@@ -481,7 +481,6 @@ If you are providing code changes, use the insert_edit_into_file tool (if availa
         opts = {
           acp = {
             enabled = true, -- Enable ACP command completion
-            trigger = "\\", -- Trigger character for ACP commands
           },
         },
       },
@@ -1002,6 +1001,13 @@ The user is working on a %s machine. Please respond with system specific command
     ---@return boolean
     send_code = true,
 
+    triggers = {
+      acp_slash_commands = "\\",
+      slash_commands = "/",
+      tools = "@",
+      variables = "#",
+    },
+
     job_start_delay = 1500, -- Delay in milliseconds between cmd tools
     submit_delay = 2000, -- Delay in milliseconds before auto-submitting the chat buffer
   },

lua/codecompanion/interactions/chat/keymaps/init.lua

@@ -1,6 +1,8 @@
 local async = require("plenary.async")
 local completion = require("codecompanion.providers.completion")
 local config = require("codecompanion.config")
+local triggers = require("codecompanion.triggers")
+
 local ts = require("codecompanion.utils.treesitter")
 local ui_utils = require("codecompanion.utils.ui")
 local utils = require("codecompanion.utils")
@@ -217,9 +219,9 @@ M.completion = {
           if item.label then
             -- Add bracket wrapping for variables and tools like cmp/blink do
             if item.type == "variable" then
-              item.word = string.format("#{%s}", item.label:sub(2))
+              item.word = string.format("%s{%s}", triggers.mappings.variables, item.label:sub(2))
             elseif item.type == "tool" then
-              item.word = string.format("@{%s}", item.label:sub(2))
+              item.word = string.format("%s{%s}", triggers.mappings.tools, item.label:sub(2))
             else
               item.word = item.label
             end

lua/codecompanion/interactions/chat/tools/init.lua

@@ -20,6 +20,7 @@ local tool_filter = require("codecompanion.interactions.chat.tools.filter")
 local config = require("codecompanion.config")
 local log = require("codecompanion.utils.log")
 local regex = require("codecompanion.utils.regex")
+local triggers = require("codecompanion.triggers")
 local ui_utils = require("codecompanion.utils.ui")
 local utils = require("codecompanion.utils")
 
@@ -28,7 +29,7 @@ local api = vim.api
 local show_tools_processing = config.display.chat.show_tools_processing
 
 local CONSTANTS = {
-  PREFIX = "@",
+  PREFIX = triggers.mappings.tools,
 
   NS_TOOLS = "CodeCompanion-tools",
   AUTOCMD_GROUP = "codecompanion.tools",

lua/codecompanion/interactions/chat/variables/init.lua

@@ -1,9 +1,11 @@
 local config = require("codecompanion.config")
+local triggers = require("codecompanion.triggers")
+
 local log = require("codecompanion.utils.log")
 local regex = require("codecompanion.utils.regex")
 
 local CONSTANTS = {
-  PREFIX = "#",
+  PREFIX = triggers.mappings.variables,
 }
 
 ---Check a message for any parameters that have been given to the variable

lua/codecompanion/interactions/inline/variables/init.lua

@@ -13,9 +13,10 @@
 local config = require("codecompanion.config")
 local log = require("codecompanion.utils.log")
 local regex = require("codecompanion.utils.regex")
+local triggers = require("codecompanion.triggers")
 
 local CONSTANTS = {
-  PREFIX = "#",
+  PREFIX = triggers.mappings.variables,
 }
 
 ---@class CodeCompanion.Inline.Variable

lua/codecompanion/providers/completion/blink/init.lua

@@ -2,6 +2,7 @@
 
 local completion = require("codecompanion.providers.completion")
 local config = require("codecompanion.config")
+local triggers = require("codecompanion.triggers")
 
 --- @class blink.cmp.Source
 local M = {}
@@ -11,11 +12,12 @@ function M.new()
 end
 
 function M:get_trigger_characters()
-  local triggers = { "/", "#", "@" }
+  local trigger_chars = { triggers.mappings.slash_commands, triggers.mappings.tools, triggers.mappings.variables }
   if config.interactions.chat.slash_commands.opts.acp.enabled then
-    table.insert(triggers, config.interactions.chat.slash_commands.opts.acp.trigger or "\\")
+    table.insert(trigger_chars, triggers.mappings.acp_slash_commands)
   end
-  return triggers
+
+  return trigger_chars
 end
 
 function M:enabled()
@@ -38,7 +40,7 @@ function M:get_completions(ctx, callback)
   }
 
   -- Slash commands
-  if trigger_char == "/" then
+  if trigger_char == triggers.mappings.slash_commands then
     callback({
       context = ctx,
       is_incomplete_forward = false,
@@ -68,7 +70,7 @@ function M:get_completions(ctx, callback)
     })
 
   -- Variables
-  elseif trigger_char == "#" then
+  elseif trigger_char == triggers.mappings.variables then
     callback({
       context = ctx,
       is_incomplete_forward = false,
@@ -80,7 +82,7 @@ function M:get_completions(ctx, callback)
             kind = vim.lsp.protocol.CompletionItemKind.Variable,
             label = item.label:sub(2),
             textEdit = {
-              newText = string.format("#{%s}", item.label:sub(2)),
+              newText = string.format("%s{%s}", triggers.mappings.variables, item.label:sub(2)),
               range = edit_range,
             },
             documentation = {
@@ -94,7 +96,7 @@ function M:get_completions(ctx, callback)
     })
 
   -- Tools
-  elseif trigger_char == "@" then
+  elseif trigger_char == triggers.mappings.tools then
     callback({
       context = ctx,
       is_incomplete_forward = false,
@@ -106,7 +108,7 @@ function M:get_completions(ctx, callback)
             kind = vim.lsp.protocol.CompletionItemKind.Struct,
             label = item.label:sub(2),
             textEdit = {
-              newText = string.format("@{%s}", item.label:sub(2)),
+              newText = string.format("%s{%s}", triggers.mappings.tools, item.label:sub(2)),
               range = edit_range,
             },
             documentation = {
@@ -120,7 +122,7 @@ function M:get_completions(ctx, callback)
     })
 
   -- ACP commands
-  elseif trigger_char == (config.interactions.chat.slash_commands.opts.acp.trigger or "\\") then
+  elseif trigger_char == triggers.mappings.acp_slash_commands then
     local acp_cmds = completion.acp_commands(ctx.bufnr)
     local items = vim
       .iter(acp_cmds)

lua/codecompanion/providers/completion/cmp/acp_commands.lua

@@ -1,6 +1,8 @@
 local cc_config = require("codecompanion.config")
 local completion = require("codecompanion.providers.completion")
 
+local trigger = require("codecompanion.triggers").mappings.acp_slash_commands
+
 local source = {}
 
 function source.new(config)
@@ -12,12 +14,10 @@ function source:is_available()
 end
 
 function source:get_trigger_characters()
-  local trigger = cc_config.interactions.chat.slash_commands.opts.acp.trigger or "\\"
   return { trigger }
 end
 
 function source:get_keyword_pattern()
-  local trigger = cc_config.interactions.chat.slash_commands.opts.acp.trigger or "\\"
   local escaped = vim.pesc(trigger)
   return escaped .. [[\w\+]]
 end
@@ -52,7 +52,7 @@ function source:execute(item, callback)
   local line = vim.api.nvim_get_current_line()
 
   -- Remove the trigger character and partial command
-  local before = line:sub(1, col):gsub("\\%w*$", "")
+  local before = line:sub(1, col):gsub(string.format("%s%w*$", trigger), "")
   local after = line:sub(col + 1)
   local new_line = before .. text .. after