feat(settings): add includeGitInstructions toggle

Adds an 'Include git instructions' toggle to the Agent Settings panel.
When disabled, sets CLAUDE_CODE_DISABLE_GIT_INSTRUCTIONS=1 on the Claude
process to remove built-in commit and PR workflow guidance from its
system prompt. Resolves #209.

src-tauri/src/config.rs

@@ -37,6 +37,9 @@ pub struct ClaudeStartOptions {
 
     #[serde(default)]
     pub disable_cron: bool,
+
+    #[serde(default = "default_include_git_instructions")]
+    pub include_git_instructions: bool,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -174,6 +177,9 @@ pub struct HikariConfig {
 
     #[serde(default)]
     pub disable_cron: bool,
+
+    #[serde(default = "default_include_git_instructions")]
+    pub include_git_instructions: bool,
 }
 
 impl Default for HikariConfig {
@@ -221,6 +227,7 @@ impl Default for HikariConfig {
             task_loop_commit_prefix: "feat".to_string(),
             task_loop_include_summary: false,
             disable_cron: false,
+            include_git_instructions: true,
         }
     }
 }
@@ -265,6 +272,10 @@ fn default_task_loop_commit_prefix() -> String {
     "feat".to_string()
 }
 
+fn default_include_git_instructions() -> bool {
+    true
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize, Default, PartialEq)]
 #[serde(rename_all = "lowercase")]
 pub enum BudgetAction {
@@ -360,6 +371,7 @@ mod tests {
         assert_eq!(config.task_loop_commit_prefix, "feat");
         assert!(!config.task_loop_include_summary);
         assert!(!config.disable_cron);
+        assert!(config.include_git_instructions);
     }
 
     #[test]
@@ -407,6 +419,7 @@ mod tests {
             task_loop_commit_prefix: "fix".to_string(),
             task_loop_include_summary: true,
             disable_cron: true,
+            include_git_instructions: false,
         };
 
         let json = serde_json::to_string(&config).unwrap();
@@ -425,6 +438,7 @@ mod tests {
         assert_eq!(deserialized.task_loop_commit_prefix, "fix");
         assert!(deserialized.task_loop_include_summary);
         assert!(deserialized.disable_cron);
+        assert!(!deserialized.include_git_instructions);
     }
 
     #[test]

src-tauri/src/wsl_bridge.rs

@@ -315,6 +315,11 @@ impl WslBridge {
                 cmd.env("CLAUDE_CODE_DISABLE_CRON", "1");
             }
 
+            // Disable built-in git instructions if requested
+            if !options.include_git_instructions {
+                cmd.env("CLAUDE_CODE_DISABLE_GIT_INSTRUCTIONS", "1");
+            }
+
             cmd
         } else {
             // Running on Windows - use wsl with bash login shell to ensure PATH is loaded
@@ -372,6 +377,11 @@ impl WslBridge {
                 claude_cmd.push_str("CLAUDE_CODE_DISABLE_CRON=1 ");
             }
 
+            // Disable built-in git instructions if requested
+            if !options.include_git_instructions {
+                claude_cmd.push_str("CLAUDE_CODE_DISABLE_GIT_INSTRUCTIONS=1 ");
+            }
+
             claude_cmd.push_str(
                 "claude --output-format stream-json --input-format stream-json --verbose",
             );

src/lib/commands/slashCommands.test.ts

@@ -65,6 +65,7 @@ vi.mock("$lib/stores/config", () => ({
       use_worktree: false,
       disable_1m_context: false,
       max_output_tokens: null,
+      include_git_instructions: true,
     }),
   },
 }));

src/lib/commands/slashCommands.ts

@@ -66,6 +66,7 @@ async function changeDirectory(path: string): Promise<void> {
         use_worktree: config.use_worktree ?? false,
         disable_1m_context: config.disable_1m_context ?? false,
         max_output_tokens: config.max_output_tokens ?? null,
+        include_git_instructions: config.include_git_instructions ?? true,
       },
     });
 
@@ -143,6 +144,7 @@ async function startNewConversation(): Promise<void> {
         use_worktree: config.use_worktree ?? false,
         disable_1m_context: config.disable_1m_context ?? false,
         max_output_tokens: config.max_output_tokens ?? null,
+        include_git_instructions: config.include_git_instructions ?? true,
       },
     });
 

src/lib/components/ConfigSidebar.svelte

@@ -59,6 +59,7 @@
     use_worktree: false,
     disable_1m_context: false,
     disable_cron: false,
+    include_git_instructions: true,
     max_output_tokens: null,
     trusted_workspaces: [],
     background_image_path: null,
@@ -566,6 +567,22 @@
         </p>
       </div>
 
+      <!-- Include Git Instructions -->
+      <div class="mb-4">
+        <label class="flex items-center gap-3 cursor-pointer">
+          <input
+            type="checkbox"
+            bind:checked={config.include_git_instructions}
+            class="w-4 h-4 rounded border-[var(--border-color)] bg-[var(--bg-primary)] text-[var(--accent-primary)] focus:ring-[var(--accent-primary)]"
+          />
+          <span class="text-sm text-[var(--text-primary)]">Include git instructions</span>
+        </label>
+        <p class="text-xs text-[var(--text-tertiary)] mt-1 ml-7">
+          When disabled, sets <code class="font-mono">CLAUDE_CODE_DISABLE_GIT_INSTRUCTIONS=1</code> to
+          remove Claude's built-in commit and PR workflow guidance from its system prompt
+        </p>
+      </div>
+
       <!-- Max Output Tokens -->
       <div class="mb-4">
         <label class="block text-sm text-[var(--text-primary)] mb-1" for="max-output-tokens">

src/lib/components/InputBar.svelte

@@ -402,6 +402,7 @@ User: ${formattedMessage}`;
               allowed_tools: allAllowedTools,
               use_worktree: config.use_worktree ?? false,
               disable_1m_context: config.disable_1m_context ?? false,
+              include_git_instructions: config.include_git_instructions ?? true,
             },
           });
 

src/lib/components/PermissionModal.svelte

@@ -89,6 +89,7 @@
           allowed_tools: [...new Set([...newGrantedTools, ...config.auto_granted_tools])],
           use_worktree: config.use_worktree ?? false,
           disable_1m_context: config.disable_1m_context ?? false,
+          include_git_instructions: config.include_git_instructions ?? true,
         },
       });
 

src/lib/components/StatusBar.svelte

@@ -168,6 +168,7 @@
           use_worktree: currentConfig.use_worktree ?? false,
           disable_1m_context: currentConfig.disable_1m_context ?? false,
           max_output_tokens: currentConfig.max_output_tokens ?? null,
+          include_git_instructions: currentConfig.include_git_instructions ?? true,
         },
       });
 
@@ -325,6 +326,7 @@
           use_worktree: currentConfig.use_worktree ?? false,
           disable_1m_context: currentConfig.disable_1m_context ?? false,
           max_output_tokens: currentConfig.max_output_tokens ?? null,
+          include_git_instructions: currentConfig.include_git_instructions ?? true,
         },
       });
 

src/lib/components/TaskLoopPanel.svelte

@@ -218,6 +218,7 @@
           use_worktree: cfg.use_worktree ?? false,
           disable_1m_context: cfg.disable_1m_context ?? false,
           max_output_tokens: cfg.max_output_tokens ?? null,
+          include_git_instructions: cfg.include_git_instructions ?? true,
         },
       });
     } catch (error) {

src/lib/components/UserQuestionModal.svelte

@@ -108,6 +108,7 @@
           allowed_tools: grantedToolsList,
           use_worktree: config.use_worktree ?? false,
           disable_1m_context: config.disable_1m_context ?? false,
+          include_git_instructions: config.include_git_instructions ?? true,
         },
       });
 

src/lib/stores/config.test.ts

@@ -220,6 +220,7 @@ describe("config store", () => {
         task_loop_auto_commit: false,
         task_loop_commit_prefix: "feat",
         task_loop_include_summary: false,
+        include_git_instructions: true,
       };
 
       expect(config.model).toBe("claude-sonnet-4");
@@ -279,6 +280,7 @@ describe("config store", () => {
         task_loop_auto_commit: false,
         task_loop_commit_prefix: "feat",
         task_loop_include_summary: false,
+        include_git_instructions: true,
       };
 
       expect(config.model).toBeNull();
@@ -893,6 +895,7 @@ describe("config store", () => {
         task_loop_auto_commit: false,
         task_loop_commit_prefix: "feat",
         task_loop_include_summary: false,
+        include_git_instructions: true,
       };
 
       const mockInvokeImpl = vi.mocked(invoke);

src/lib/stores/config.ts

@@ -81,6 +81,8 @@ export interface HikariConfig {
   task_loop_auto_commit: boolean;
   task_loop_commit_prefix: string;
   task_loop_include_summary: boolean;
+  // Git instructions setting
+  include_git_instructions: boolean;
 }
 
 const defaultConfig: HikariConfig = {
@@ -134,6 +136,7 @@ const defaultConfig: HikariConfig = {
   task_loop_auto_commit: false,
   task_loop_commit_prefix: "feat",
   task_loop_include_summary: false,
+  include_git_instructions: true,
 };
 
 function createConfigStore() {