feat(repo stats): default to walking all commits (with patch-id dedup)

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "loki-cli"
-version = "2.5.0"
+version = "2.6.0"
 authors = ["Kyle W. Rader"]
 description = "Loki: 🚀 A Git productivity tool"
 homepage = "https://github.com/kyle-rader/loki-cli"

README.md

@@ -182,7 +182,7 @@ Analyze commits reachable from HEAD to see who has been landing work in a reposi
 
 - `--name` filters by author display name (repeatable, case-insensitive).
 - `--email` filters by author email (repeatable, case-insensitive).
-- `--all` includes all commits (default is first-parent only).
+- `--first-parent` restricts the walk to the first-parent chain of HEAD (one tally per merge commit). Default walks all commits reachable from HEAD, relying on patch-id dedup to handle rebased / cherry-picked / migrated history.
 - `--no-dedup` disables patch-id deduplication (see below).
 
 #### Patch-id deduplication

src/main.rs

@@ -75,9 +75,16 @@ struct RepoStatsOptions {
     #[clap(long, default_value_t = 20)]
     top: usize,
 
-    /// Include all commits (disables first-parent-only filtering).
-    #[clap(long, default_value = "false")]
-    all: bool,
+    /// Only count commits on the first-parent chain of HEAD.
+    ///
+    /// By default `lk repo stats` walks every commit reachable from HEAD
+    /// (with patch-id deduplication applied so logically-identical commits
+    /// from rebases / cherry-picks / cross-repo migrations are counted
+    /// once). Pass `--first-parent` to restrict the walk to the mainline
+    /// of merges into HEAD — useful when each PR is merged with a merge
+    /// commit and you want one tally per PR.
+    #[clap(long, default_value_t = false)]
+    first_parent: bool,
 
     /// Only include commits authored by these names (repeatable, case-insensitive fuzzy match).
     #[clap(long = "name", value_name = "NAME")]
@@ -384,14 +391,14 @@ fn repo_stats(options: &RepoStatsOptions) -> Result<(), String> {
     progress.finish();
 
     if totals.is_empty() {
-        if options.all {
+        if options.first_parent {
             println!(
-                "No commits found between {} and {}.",
+                "No first-parent commits found between {} and {}.",
                 range.start_label, range.end_label
             );
         } else {
             println!(
-                "No first-parent commits found between {} and {}.",
+                "No commits found between {} and {}.",
                 range.start_label, range.end_label
             );
         }
@@ -464,7 +471,7 @@ fn collect_raw_commits(
     range: &TimeRange,
 ) -> Result<Vec<RawCommit>, String> {
     let mut git_args: Vec<String> = vec!["log".to_string()];
-    if !options.all {
+    if options.first_parent {
         git_args.push("--first-parent".to_string());
     }
     git_args.push("--pretty=format:%H%x09%ct%x09%an%x09%ae".to_string());