feat(ai): Add model option to Claude CLI

README.md

@@ -163,7 +163,7 @@ require("codereview").setup({
     review_level  = "info",        -- "info" | "suggestion" | "warning" | "error"
     max_file_size = 500,           -- skip files larger than N lines (0 = unlimited)
 
-    claude_cli = { cmd = "claude", agent = "code-review" },
+    claude_cli = { cmd = "claude", model = nil, agent = "code-review" },
     codex_cli = { cmd = "codex", model = nil },
     copilot_cli = { cmd = "copilot", model = nil, agent = nil },
     gemini_cli = { cmd = "gemini", model = nil },

doc/codereview.txt

@@ -319,6 +319,7 @@ Options for AI review. See |codereview-ai-review|.
 
       claude_cli = {
         cmd   = "claude",       -- path or name of the claude binary
+        model = nil,            -- optional model override
         agent = "code-review",  -- Claude agent/profile name
       },
       codex_cli = {
@@ -398,6 +399,7 @@ Requirements:
     provider = "claude_cli",
     claude_cli = {
       cmd   = "claude",       -- binary name or full path
+      model = "opus",         -- optional model override
       agent = "code-review",  -- agent/profile name
     },
   }

lua/codereview/ai/providers/claude_cli.lua

@@ -2,8 +2,12 @@ local config = require("codereview.config")
 local utils = require("codereview.ai.providers.utils")
 local M = {}
 
-function M.build_cmd(claude_cmd, agent)
+function M.build_cmd(claude_cmd, model, agent)
   local cmd = { claude_cmd, "-p" }
+  if model and model ~= "" then
+    table.insert(cmd, "--model")
+    table.insert(cmd, model)
+  end
   if agent then
     table.insert(cmd, "--agent")
     table.insert(cmd, agent)
@@ -22,7 +26,7 @@ function M.run(prompt, callback, opts)
   local pcfg = cfg.ai.claude_cli or {}
   local claude_cmd = pcfg.cmd or cfg.ai.claude_cmd or "claude"
   local agent = (not opts.skip_agent) and (pcfg.agent or cfg.ai.agent) or nil
-  local cmd = M.build_cmd(claude_cmd, agent)
+  local cmd = M.build_cmd(claude_cmd, pcfg.model, agent)
   return utils.run_cli(prompt, callback, cmd)
 end
 

lua/codereview/config.lua

@@ -43,6 +43,7 @@
 
 ---@class codereview.config.ai.ClaudeCLI
 ---@field cmd? string Claude CLI command (default: `claude`)
+---@field model? string Claude model name
 ---@field agent? string Claude Agent (default: `code-review`)
 
 ---@class codereview.config.ai.CodexCLI
@@ -104,7 +105,7 @@ local defaults = {
     provider = "claude_cli",
     review_level = "info",
     max_file_size = 500,
-    claude_cli = { cmd = "claude", agent = "code-review" },
+    claude_cli = { cmd = "claude", model = nil, agent = "code-review" },
     codex_cli = { cmd = "codex", model = nil },
     copilot_cli = { cmd = "copilot", model = nil, agent = nil },
     gemini_cli = { cmd = "gemini", model = nil },

tests/codereview/ai/providers/claude_cli_spec.lua

@@ -1,6 +1,12 @@
 package.loaded["codereview.config"] = {
   get = function()
-    return { ai = { enabled = true, provider = "claude_cli", claude_cli = { cmd = "claude", agent = "code-review" } } }
+    return {
+      ai = {
+        enabled = true,
+        provider = "claude_cli",
+        claude_cli = { cmd = "claude", model = nil, agent = "code-review" },
+      },
+    }
   end,
 }
 package.loaded["codereview.log"] = { debug = function() end, warn = function() end, error = function() end }
@@ -13,10 +19,13 @@ describe("ai.providers.claude_cli", function()
       assert.same({ "claude", "-p" }, claude_cli.build_cmd("claude"))
     end)
     it("includes agent flag when provided", function()
-      assert.same({ "claude", "-p", "--agent", "code-review" }, claude_cli.build_cmd("claude", "code-review"))
+      assert.same({ "claude", "-p", "--agent", "code-review" }, claude_cli.build_cmd("claude", nil, "code-review"))
     end)
     it("omits agent flag when nil", function()
-      assert.same({ "claude", "-p" }, claude_cli.build_cmd("claude", nil))
+      assert.same({ "claude", "-p" }, claude_cli.build_cmd("claude", nil, nil))
+    end)
+    it("includes model flag when provided", function()
+      assert.same({ "claude", "-p", "--model", "model" }, claude_cli.build_cmd("claude", "model", nil))
     end)
   end)
 end)

tests/codereview/ai/subprocess_spec.lua

@@ -14,13 +14,23 @@ describe("ai.subprocess", function()
     end)
 
     it("includes agent flag when provided", function()
-      local cmd = subprocess.build_cmd("claude", "code-review")
+      local cmd = subprocess.build_cmd("claude", nil, "code-review")
       assert.same({ "claude", "-p", "--agent", "code-review" }, cmd)
     end)
 
     it("omits agent flag when agent is nil", function()
       local cmd = subprocess.build_cmd("claude", nil)
       assert.same({ "claude", "-p" }, cmd)
     end)
+
+    it("includes model flag when provided", function()
+      local cmd = subprocess.build_cmd("claude", "model")
+      assert.same({ "claude", "-p", "--model", "model" }, cmd)
+    end)
+
+    it("omits model flag when model is nil", function()
+      local cmd = subprocess.build_cmd("claude", nil, nil)
+      assert.same({ "claude", "-p" }, cmd)
+    end)
   end)
 end)