git pkgs history now works without a package argument

Author: andrew

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## [Unreleased]
 
+- `git pkgs history` now works without a package argument to show all dependency changes
+
 ## [0.1.0] - 2026-01-01
 
 - Initial release

README.md

@@ -105,13 +105,14 @@ Gemfile (rubygems):
   ...
 ```
 
-### View package history
+### View dependency history
 
 ```bash
-git pkgs history rails
+git pkgs history          # all dependency changes
+git pkgs history rails    # changes for a specific package
 ```
 
-Shows when the package was added, version changes, and removal:
+Shows when packages were added, updated, or removed:
 
 ```
 History for rails:

lib/git/pkgs/commands/history.rb

@@ -12,11 +12,6 @@ def initialize(args)
         def run
           package_name = @args.shift
 
-          unless package_name
-            $stderr.puts "Usage: git pkgs history <package>"
-            exit 1
-          end
-
           repo = Repository.new
 
           unless Database.exists?(repo.git_dir)
@@ -28,15 +23,20 @@ def run
 
           changes = Models::DependencyChange
             .includes(:commit, :manifest)
-            .for_package(package_name)
             .order("commits.committed_at ASC")
 
+          changes = changes.for_package(package_name) if package_name
+
           if @options[:ecosystem]
             changes = changes.for_platform(@options[:ecosystem])
           end
 
           if changes.empty?
-            puts "No history found for '#{package_name}'"
+            if package_name
+              puts "No history found for '#{package_name}'"
+            else
+              puts "No dependency changes found"
+            end
             return
           end
 
@@ -48,7 +48,11 @@ def run
         end
 
         def output_text(changes, package_name)
-          puts "History for #{package_name}:"
+          if package_name
+            puts "History for #{package_name}:"
+          else
+            puts "Dependency history:"
+          end
           puts
 
           changes.each do |change|
@@ -67,7 +71,8 @@ def output_text(changes, package_name)
               version_info = change.requirement
             end
 
-            puts "#{date} #{action} #{version_info}"
+            name_prefix = package_name ? "" : "#{change.name} "
+            puts "#{date} #{action} #{name_prefix}#{version_info}"
             puts "  Commit: #{commit.short_sha} #{commit.message&.lines&.first&.strip}"
             puts "  Author: #{commit.author_name} <#{commit.author_email}>"
             puts "  Manifest: #{change.manifest.path}"
@@ -80,6 +85,7 @@ def output_json(changes)
 
           data = changes.map do |change|
             {
+              name: change.name,
               date: change.commit.committed_at.iso8601,
               change_type: change.change_type,
               requirement: change.requirement,
@@ -102,7 +108,7 @@ def parse_options
           options = {}
 
           parser = OptionParser.new do |opts|
-            opts.banner = "Usage: git pkgs history <package> [options]"
+            opts.banner = "Usage: git pkgs history [package] [options]"
 
             opts.on("-e", "--ecosystem=NAME", "Filter by ecosystem") do |v|
               options[:ecosystem] = v