feat(app): make commit history depth configurable via max_commit_count (#2762)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

Author: tusharmath

crates/forge_app/src/git_app.rs

@@ -231,15 +231,12 @@ where
 
     /// Fetches git context (branch name and recent commits)
     async fn fetch_git_context(&self, cwd: &Path) -> Result<(String, String)> {
+        let max_commit_count = self.services.get_config().max_commit_count;
+        let git_log_cmd =
+            format!("git log --pretty=format:%s --abbrev-commit --max-count={max_commit_count}");
         let (recent_commits, branch_name) = tokio::join!(
-            self.services.execute(
-                "git log --pretty=format:%s --abbrev-commit --max-count=20".into(),
-                cwd.to_path_buf(),
-                false,
-                true,
-                None,
-                None,
-            ),
+            self.services
+                .execute(git_log_cmd, cwd.to_path_buf(), false, true, None, None,),
             self.services.execute(
                 "git rev-parse --abbrev-ref HEAD".into(),
                 cwd.to_path_buf(),

crates/forge_config/.forge.toml

@@ -1,5 +1,6 @@
 auto_open_dump = false
 max_conversations = 100
+max_commit_count = 20
 max_extensions = 15
 max_fetch_chars = 50000
 max_file_read_batch_size = 50

crates/forge_config/src/config.rs

@@ -108,6 +108,10 @@ pub struct ForgeConfig {
     /// Model and provider configuration used for commit message generation.
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub commit: Option<ModelConfig>,
+    /// Maximum number of recent commits included as context for commit message
+    /// generation.
+    #[serde(default)]
+    pub max_commit_count: usize,
     /// Model and provider configuration used for shell command suggestion
     /// generation.
     #[serde(default, skip_serializing_if = "Option::is_none")]

forge.schema.json

@@ -67,6 +67,13 @@
         }
       ]
     },
+    "max_commit_count": {
+      "description": "Maximum number of recent commits included as context for commit message\ngeneration.",
+      "type": "integer",
+      "format": "uint",
+      "default": 0,
+      "minimum": 0
+    },
     "max_conversations": {
       "description": "Maximum number of conversations shown in the conversation list.",
       "type": "integer",