fix: ensure forge alias commands have correct name in frontmatter

When inject_name is enabled (for forge), alias command files must
have their own name field in frontmatter, not reuse the primary
command's name. This is critical for Forge's command discovery
and dispatch system.

Changes:
- For agents with inject_name, create a deepcopy of frontmatter
  for each alias and set the name to the alias name
- Re-render the command content with the alias-specific frontmatter
- Ensures each alias file has the correct name field matching its
  filename

This fixes command discovery issues where forge would try to invoke
aliases using the primary command's name.

src/specify_cli/agents.py

@@ -539,11 +539,30 @@ class CommandRegistrar:
 
             for alias in cmd_info.get("aliases", []):
                 alias_output_name = self._compute_output_name(agent_name, alias, agent_config)
-                alias_output = output
-                if agent_config["extension"] == "/SKILL.md":
-                    alias_output = self.render_skill_command(
-                        agent_name, alias_output_name, frontmatter, body, source_id, cmd_file, project_root
-                    )
+                
+                # For agents with inject_name, render with alias-specific frontmatter
+                if agent_config.get("inject_name"):
+                    alias_frontmatter = deepcopy(frontmatter)
+                    alias_frontmatter["name"] = alias
+                    
+                    if agent_config["extension"] == "/SKILL.md":
+                        alias_output = self.render_skill_command(
+                            agent_name, alias_output_name, alias_frontmatter, body, source_id, cmd_file, project_root
+                        )
+                    elif agent_config["format"] == "markdown":
+                        alias_output = self.render_markdown_command(alias_frontmatter, body, source_id, context_note)
+                    elif agent_config["format"] == "toml":
+                        alias_output = self.render_toml_command(alias_frontmatter, body, source_id)
+                    else:
+                        raise ValueError(f"Unsupported format: {agent_config['format']}")
+                else:
+                    # For other agents, reuse the primary output
+                    alias_output = output
+                    if agent_config["extension"] == "/SKILL.md":
+                        alias_output = self.render_skill_command(
+                            agent_name, alias_output_name, frontmatter, body, source_id, cmd_file, project_root
+                        )
+                
                 alias_file = commands_dir / f"{alias_output_name}{agent_config['extension']}"
                 alias_file.parent.mkdir(parents=True, exist_ok=True)
                 alias_file.write_text(alias_output, encoding="utf-8")