Add cline_cli as built-in adapter

doc/configuration/adapters-acp.md

@@ -308,6 +308,15 @@ require("codecompanion").setup({
 })
 ```
 
+## Setup: Cline CLI
+
+To use [Cline CLI](https://cline.bot/cli) within CodeCompanion, you'll need to take the following steps:
+
+1. [Install](https://docs.cline.bot/getting-started/installing-cline#cli) Cline CLI.
+2. Authenticate by running `cline auth`.
+3. Select the `cline_cli` adapter in your chat buffer
+
+
 ## Setup: Codex
 
 To use OpenAI's [Codex](https://openai.com/codex/), install an ACP-compatible adapter like [this](https://github.com/zed-industries/codex-acp) one from [Zed](https://zed.dev).

doc/index.md

@@ -21,7 +21,7 @@ CodeCompanion is a Neovim plugin which enables you to code with AI, using LLMs a
 - :speech_balloon: [Copilot Chat](https://github.com/features/copilot) meets [Zed AI](https://zed.dev/blog/zed-ai), in Neovim
 - :zap: Integrates Neovim with LLMs and Agents in the CLI
 - :electric_plug: Support for LLMs from Anthropic, Copilot, GitHub Models, DeepSeek, Gemini, Mistral AI, Novita, Ollama, OpenAI, Azure OpenAI, HuggingFace and xAI out of the box (or bring your own!)
-- :robot: Support for [Agent Client Protocol](https://agentclientprotocol.com/overview/introduction), enabling coding with agents like [Augment Code](https://docs.augmentcode.com/cli/overview), [Cagent](https://github.com/docker/cagent) from Docker, [Claude Code](https://docs.anthropic.com/en/docs/claude-code/overview), [Codex](https://openai.com/codex), [Copilot CLI](https://github.com/features/copilot/cli), [Gemini CLI](https://github.com/google-gemini/gemini-cli), [Goose](https://block.github.io/goose/), [Cursor CLI](https://cursor.com/docs/cli/overview), [Kimi CLI](https://github.com/MoonshotAI/kimi-cli), [Kiro](https://kiro.dev/cli/), [Mistral Vibe](https://github.com/mistralai/mistral-vibe) and [OpenCode](https://opencode.ai)
+- :robot: Support for [Agent Client Protocol](https://agentclientprotocol.com/overview/introduction), enabling coding with agents like [Augment Code](https://docs.augmentcode.com/cli/overview), [Cagent](https://github.com/docker/cagent) from Docker, [Claude Code](https://docs.anthropic.com/en/docs/claude-code/overview), [Cline CLI](https://docs.cline.bot/home), [Codex](https://openai.com/codex), [Copilot CLI](https://github.com/features/copilot/cli), [Gemini CLI](https://github.com/google-gemini/gemini-cli), [Goose](https://block.github.io/goose/), [Cursor CLI](https://cursor.com/docs/cli/overview), [Kimi CLI](https://github.com/MoonshotAI/kimi-cli), [Kiro](https://kiro.dev/cli/), [Mistral Vibe](https://github.com/mistralai/mistral-vibe) and [OpenCode](https://opencode.ai)
 - :heart_hands: User contributed and supported [adapters](/configuration/adapters-http#community-adapters)
 - :battery: Support for [Model Context Protocol (MCP)](/model-context-protocol)
 - :rocket: [Inline transformations](/usage/inline.html), code creation and refactoring
@@ -47,6 +47,7 @@ CodeCompanion uses [HTTP](configuration/adapters-http) and [ACP](configuration/a
 - Augment Code (`auggie_cli`) - Requires an API key
 - Cagent (`cagent`)
 - Claude Code (`claude_code`) - Requires an API key or a Claude Pro subscription
+- Cline CLI (`cline_cli`)
 - Codex (`codex`) - Requires an API key
 - Copilot (`copilot`) - Requires a token which is created via `:Copilot setup` in [Copilot.vim](https://github.com/github/copilot.vim)
 - Gemini CLI (`gemini_cli`) - Requires an API key or a Gemini Pro subscription

lua/codecompanion/adapters/acp/cline_cli.lua

@@ -0,0 +1,64 @@
+local helpers = require("codecompanion.adapters.acp.helpers")
+
+---@class CodeCompanion.ACPAdapter.ClineCLI: CodeCompanion.ACPAdapter
+return {
+  name = "cline_cli",
+  formatted_name = "Cline CLI",
+  type = "acp",
+  roles = {
+    llm = "assistant",
+    user = "user",
+  },
+  opts = {
+    vision = true,
+  },
+  commands = {
+    default = {
+      "cline",
+      "--acp",
+    },
+  },
+  defaults = {
+    mcpServers = {},
+    timeout = 20000, -- 20 seconds
+    -- mode = "plan", -- Optional: Set default agent mode (e.g., "plan", "act")
+  },
+  parameters = {
+    protocolVersion = 1,
+    clientCapabilities = {
+      fs = { readTextFile = true, writeTextFile = true },
+    },
+    clientInfo = {
+      name = "CodeCompanion.nvim",
+      version = "1.0.0",
+    },
+  },
+  handlers = {
+    ---@param self CodeCompanion.ACPAdapter
+    ---@return boolean
+    setup = function(self)
+      return true
+    end,
+
+    ---Manually handle authentication
+    ---@param self CodeCompanion.ACPAdapter
+    ---@return boolean
+    auth = function(self)
+      return true
+    end,
+
+    ---@param self CodeCompanion.ACPAdapter
+    ---@param messages table
+    ---@param capabilities table
+    ---@return table
+    form_messages = function(self, messages, capabilities)
+      return helpers.form_messages(self, messages, capabilities)
+    end,
+
+    ---Function to run when the request has completed. Useful to catch errors
+    ---@param self CodeCompanion.ACPAdapter
+    ---@param code number
+    ---@return nil
+    on_exit = function(self, code) end,
+  },
+}

lua/codecompanion/config.lua

@@ -39,6 +39,7 @@ local defaults = {
       auggie_cli = "auggie_cli",
       cagent = "cagent",
       claude_code = "claude_code",
+      cline_cli = "cline_cli",
       codex = "codex",
       cursor_cli = "cursor_cli",
       copilot_acp = "copilot_acp",