Refactor build system and implement complete renderer system

- Split monolithic build.rs into modular async generators
- Add renderer override system with type-safe dispatch
- Implement command template macro for consistent command definitions
- Add proc-macro crates for command and renderer systems
- Reorganize directory structure for better separation of concerns
- Update documentation to reflect new architecture

18 files changed, 456 insertions, 254 deletions

diff --git a/src/bin/jvn.rs b/src/bin/jvn.rs
index 598be3d..1dbc517 100644
--- a/src/bin/jvn.rs
+++ b/src/bin/jvn.rs
@@ -3,7 +3,7 @@ use std::process::exit;
 use cli_utils::display::md;
 use cli_utils::env::current_locales;
 use cli_utils::levenshtein_distance::levenshtein_distance;
-use just_enough_vcs_cli::systems::cmd::_registry::jv_cmd_nodes;
+use just_enough_vcs_cli::systems::cmd::_commands::jv_cmd_nodes;
 use just_enough_vcs_cli::systems::cmd::cmd_system::JVCommandContext;
 use just_enough_vcs_cli::systems::cmd::errors::{CmdExecuteError, CmdPrepareError, CmdRenderError};
 use just_enough_vcs_cli::systems::cmd::{errors::CmdProcessError, processer::jv_cmd_process};
@@ -120,6 +120,15 @@ async fn main() {
                             eprintln!("{}", help)
                         }
                     }
+                    CmdProcessError::RendererOverrideButRequestHelp => {
+                        eprintln!(
+                            "{}",
+                            md(t!("process_error.renderer_override_but_request_help"))
+                        );
+                    }
+                    CmdProcessError::DowncastFailed => {
+                        eprintln!("{}", md(t!("process_error.downcast_failed")));
+                    }
                 }
             }
             std::process::exit(1);
@@ -253,5 +262,11 @@ fn handle_render_error(cmd_render_error: CmdRenderError) {
                 ))
             );
         }
+        CmdRenderError::TypeMismatch {
+            expected: _,
+            actual: _,
+        } => {
+            eprintln!("{}", md(t!("render_error.type_mismatch")));
+        }
     }
 }
diff --git a/src/cmds.rs b/src/cmds.rs
index 46057c8..92e587f 100644
--- a/src/cmds.rs
+++ b/src/cmds.rs
@@ -3,4 +3,5 @@ pub mod cmd;
 pub mod collect;
 pub mod r#in;
 pub mod out;
+pub mod r#override;
 pub mod renderer;
diff --git a/src/cmds/cmd/status.rs b/src/cmds/cmd/status.rs
index f34dbb8..52f12d0 100644
--- a/src/cmds/cmd/status.rs
+++ b/src/cmds/cmd/status.rs
@@ -1,159 +1,156 @@
 use std::{collections::HashMap, time::SystemTime};
 
-use just_enough_vcs::vcs::{
-    constants::VAULT_HOST_NAME, data::local::workspace_analyzer::ModifiedRelativePathBuf,
-};
-
 use crate::{
+    cmd_output,
     cmds::{
         arg::status::JVStatusArgument,
         collect::status::JVStatusCollect,
         r#in::status::JVStatusInput,
         out::status::{JVStatusOutput, JVStatusWrongModifyReason},
-        renderer::status::JVStatusRenderer,
     },
     systems::cmd::{
-        cmd_system::{JVCommand, JVCommandContext},
+        cmd_system::JVCommandContext,
         errors::{CmdExecuteError, CmdPrepareError},
         workspace_reader::LocalWorkspaceReader,
     },
 };
+use cmd_system_macros::exec;
+use just_enough_vcs::vcs::{
+    constants::VAULT_HOST_NAME, data::local::workspace_analyzer::ModifiedRelativePathBuf,
+};
 
 pub struct JVStatusCommand;
+type Cmd = JVStatusCommand;
+type Arg = JVStatusArgument;
+type In = JVStatusInput;
+type Collect = JVStatusCollect;
 
-impl JVCommand<JVStatusArgument, JVStatusInput, JVStatusCollect, JVStatusOutput, JVStatusRenderer>
-    for JVStatusCommand
-{
-    async fn prepare(
-        _args: &JVStatusArgument,
-        _ctx: &JVCommandContext,
-    ) -> Result<JVStatusInput, CmdPrepareError> {
-        Ok(JVStatusInput)
-    }
+fn help_str() -> String {
+    "".to_string()
+}
 
-    async fn collect(
-        _args: &JVStatusArgument,
-        _ctx: &JVCommandContext,
-    ) -> Result<JVStatusCollect, CmdPrepareError> {
-        // Initialize a reader for the local workspace and a default result structure
-        let mut reader = LocalWorkspaceReader::default();
-        let mut collect = JVStatusCollect::default();
-
-        // Analyze the current status of the local workspace
-        // (detects changes like created, modified, moved, etc.)
-        let analyzed = reader.analyze_local_status().await?;
-
-        // Retrieve the current account (member) ID
-        let account = reader.current_account().await?;
-
-        // Retrieve the name of the current sheet
-        let sheet_name = reader.sheet_name().await?;
-
-        // Is Host Mode
-        let is_host_mode = reader.is_host_mode().await?;
-
-        let cached_sheet = reader.cached_sheet(&sheet_name).await?;
-        let sheet_holder = cached_sheet.holder().cloned().unwrap_or_default();
-        let is_ref_sheet = sheet_holder == VAULT_HOST_NAME;
-
-        // Get Latest file data
-        let latest_file_data = reader.pop_latest_file_data(&account).await?;
-
-        // Get the timestamp of the last update, defaulting to the current time if not available
-        let update_time = reader
-            .latest_info()
-            .await?
-            .update_instant
-            .unwrap_or(SystemTime::now());
-
-        // Record the current system time
-        let now_time = SystemTime::now();
-
-        // Populate the result structure with the gathered data
-        collect.current_account = account;
-        collect.current_sheet = sheet_name;
-        collect.is_host_mode = is_host_mode;
-        collect.in_ref_sheet = is_ref_sheet;
-        collect.analyzed_result = analyzed;
-        collect.update_time = update_time;
-        collect.now_time = now_time;
-        collect.latest_file_data = latest_file_data;
-        Ok(collect)
-    }
+async fn prepare(_args: &Arg, _ctx: &JVCommandContext) -> Result<In, CmdPrepareError> {
+    Ok(JVStatusInput)
+}
 
-    async fn exec(
-        _input: JVStatusInput,
-        collect: JVStatusCollect,
-    ) -> Result<JVStatusOutput, CmdExecuteError> {
-        let mut wrong_modified_items: HashMap<ModifiedRelativePathBuf, JVStatusWrongModifyReason> =
-            HashMap::new();
+async fn collect(_args: &Arg, _ctx: &JVCommandContext) -> Result<Collect, CmdPrepareError> {
+    // Initialize a reader for the local workspace and a default result structure
+    let mut reader = LocalWorkspaceReader::default();
+    let mut collect = JVStatusCollect::default();
+
+    // Analyze the current status of the local workspace
+    // (detects changes like created, modified, moved, etc.)
+    let analyzed = reader.analyze_local_status().await?;
+
+    // Retrieve the current account (member) ID
+    let account = reader.current_account().await?;
+
+    // Retrieve the name of the current sheet
+    let sheet_name = reader.sheet_name().await?;
+
+    // Is Host Mode
+    let is_host_mode = reader.is_host_mode().await?;
+
+    let cached_sheet = reader.cached_sheet(&sheet_name).await?;
+    let sheet_holder = cached_sheet.holder().cloned().unwrap_or_default();
+    let is_ref_sheet = sheet_holder == VAULT_HOST_NAME;
+
+    // Get Latest file data
+    let latest_file_data = reader.pop_latest_file_data(&account).await?;
+
+    // Get the timestamp of the last update, defaulting to the current time if not available
+    let update_time = reader
+        .latest_info()
+        .await?
+        .update_instant
+        .unwrap_or(SystemTime::now());
+
+    // Record the current system time
+    let now_time = SystemTime::now();
+
+    // Populate the result structure with the gathered data
+    collect.current_account = account;
+    collect.current_sheet = sheet_name;
+    collect.is_host_mode = is_host_mode;
+    collect.in_ref_sheet = is_ref_sheet;
+    collect.analyzed_result = analyzed;
+    collect.update_time = update_time;
+    collect.now_time = now_time;
+    collect.latest_file_data = latest_file_data;
+    Ok(collect)
+}
 
-        let latest_file_data = &collect.latest_file_data;
+#[exec]
+async fn exec(
+    _input: In,
+    collect: Collect,
+) -> Result<(Box<dyn std::any::Any + Send + 'static>, String), CmdExecuteError> {
+    let mut wrong_modified_items: HashMap<ModifiedRelativePathBuf, JVStatusWrongModifyReason> =
+        HashMap::new();
+
+    let latest_file_data = &collect.latest_file_data;
+
+    // Calculate whether modifications are correc
+    let modified = &collect.analyzed_result.modified;
+    for item in modified {
+        // Get mapping
+        let Ok(mapping) = collect.local_sheet_data.mapping_data(&item) else {
+            continue;
+        };
 
-        // Calculate whether modifications are correc
-        let modified = &collect.analyzed_result.modified;
-        for item in modified {
-            // Get mapping
-            let Ok(mapping) = collect.local_sheet_data.mapping_data(&item) else {
+        // Check base version
+        {
+            let base_version = mapping.version_when_updated().clone();
+            let Some(latest_version) = latest_file_data
+                .file_version(mapping.mapping_vfid())
+                .cloned()
+            else {
                 continue;
             };
 
-            // Check base version
-            {
-                let base_version = mapping.version_when_updated().clone();
-                let Some(latest_version) = latest_file_data
-                    .file_version(mapping.mapping_vfid())
-                    .cloned()
-                else {
-                    continue;
-                };
-
-                // Base version dismatch
-                if base_version != latest_version {
-                    wrong_modified_items.insert(
-                        item.clone(),
-                        JVStatusWrongModifyReason::BaseVersionMismatch {
-                            base_version,
-                            latest_version,
-                        },
-                    );
-                    continue;
-                }
-            }
-
-            // Check edit right (only check when current is not HOST)
-            if collect.current_account != VAULT_HOST_NAME {
-                let holder = latest_file_data.file_holder(mapping.mapping_vfid());
-                if holder.is_none() {
-                    wrong_modified_items.insert(item.clone(), JVStatusWrongModifyReason::NoHolder);
-                    continue;
-                }
-
-                let holder = holder.cloned().unwrap();
-                if &collect.current_account != &holder {
-                    wrong_modified_items.insert(
-                        item.clone(),
-                        JVStatusWrongModifyReason::ModifiedButNotHeld { holder: holder },
-                    );
-                }
+            // Base version dismatch
+            if base_version != latest_version {
+                wrong_modified_items.insert(
+                    item.clone(),
+                    JVStatusWrongModifyReason::BaseVersionMismatch {
+                        base_version,
+                        latest_version,
+                    },
+                );
+                continue;
             }
         }
 
-        let output = JVStatusOutput {
-            current_account: collect.current_account,
-            current_sheet: collect.current_sheet,
-            is_host_mode: collect.is_host_mode,
-            in_ref_sheet: collect.in_ref_sheet,
-            analyzed_result: collect.analyzed_result,
-            wrong_modified_items: wrong_modified_items,
-            update_time: collect.update_time,
-            now_time: collect.now_time,
-        };
+        // Check edit right (only check when current is not HOST)
+        if collect.current_account != VAULT_HOST_NAME {
+            let holder = latest_file_data.file_holder(mapping.mapping_vfid());
+            if holder.is_none() {
+                wrong_modified_items.insert(item.clone(), JVStatusWrongModifyReason::NoHolder);
+                continue;
+            }
 
-        Ok(output)
+            let holder = holder.cloned().unwrap();
+            if &collect.current_account != &holder {
+                wrong_modified_items.insert(
+                    item.clone(),
+                    JVStatusWrongModifyReason::ModifiedButNotHeld { holder: holder },
+                );
+            }
+        }
     }
 
-    fn get_help_str() -> String {
-        "".to_string()
-    }
+    let output = JVStatusOutput {
+        current_account: collect.current_account,
+        current_sheet: collect.current_sheet,
+        is_host_mode: collect.is_host_mode,
+        in_ref_sheet: collect.in_ref_sheet,
+        analyzed_result: collect.analyzed_result,
+        wrong_modified_items: wrong_modified_items,
+        update_time: collect.update_time,
+        now_time: collect.now_time,
+    };
+
+    cmd_output!(output, JVStatusOutput)
 }
+
+crate::command_template!();
diff --git a/src/cmds/override.rs b/src/cmds/override.rs
new file mode 100644
index 0000000..8cfd458
--- /dev/null
+++ b/src/cmds/override.rs
@@ -0,0 +1 @@
+pub mod renderer;
diff --git a/src/cmds/override/renderer/json.rs b/src/cmds/override/renderer/json.rs
new file mode 100644
index 0000000..b4e69f1
--- /dev/null
+++ b/src/cmds/override/renderer/json.rs
@@ -0,0 +1,17 @@
+use serde::Serialize;
+use serde_json;
+
+use crate::{
+    r_print,
+    systems::{cmd::errors::CmdRenderError, render::renderer::JVRenderResult},
+};
+
+pub async fn render<T: Serialize + Send>(data: &T) -> Result<JVRenderResult, CmdRenderError> {
+    let mut r = JVRenderResult::default();
+    let json_string =
+        serde_json::to_string(data).map_err(|e| CmdRenderError::SerializeFailed(e.to_string()))?;
+
+    r_print!(r, "{}", json_string);
+
+    Ok(r)
+}
diff --git a/src/cmds/override/renderer/json_pretty.rs b/src/cmds/override/renderer/json_pretty.rs
new file mode 100644
index 0000000..3923117
--- /dev/null
+++ b/src/cmds/override/renderer/json_pretty.rs
@@ -0,0 +1,16 @@
+use serde::Serialize;
+
+use crate::{
+    r_print,
+    systems::{cmd::errors::CmdRenderError, render::renderer::JVRenderResult},
+};
+
+pub async fn render<T: Serialize + Send>(data: &T) -> Result<JVRenderResult, CmdRenderError> {
+    let mut r = JVRenderResult::default();
+    let json_string = serde_json::to_string_pretty(data)
+        .map_err(|e| CmdRenderError::SerializeFailed(e.to_string()))?;
+
+    r_print!(r, "{}", json_string);
+
+    Ok(r)
+}
diff --git a/src/cmds/renderer/json.rs b/src/cmds/renderer/json.rs
deleted file mode 100644
index 9a3105d..0000000
--- a/src/cmds/renderer/json.rs
+++ /dev/null
@@ -1,27 +0,0 @@
-use serde::Serialize;
-use serde_json;
-
-use crate::{
-    r_print,
-    systems::cmd::{
-        errors::CmdRenderError,
-        renderer::{JVRenderResult, JVResultRenderer},
-    },
-};
-
-pub struct JVResultJsonRenderer;
-
-impl<T> JVResultRenderer<T> for JVResultJsonRenderer
-where
-    T: Serialize + Sync,
-{
-    async fn render(data: &T) -> Result<JVRenderResult, CmdRenderError> {
-        let mut r = JVRenderResult::default();
-        let json_string = serde_json::to_string(data)
-            .map_err(|e| CmdRenderError::SerializeFailed(e.to_string()))?;
-
-        r_print!(r, "{}", json_string);
-
-        Ok(r)
-    }
-}
diff --git a/src/cmds/renderer/json_pretty.rs b/src/cmds/renderer/json_pretty.rs
deleted file mode 100644
index a4a3ba5..0000000
--- a/src/cmds/renderer/json_pretty.rs
+++ /dev/null
@@ -1,26 +0,0 @@
-use serde::Serialize;
-
-use crate::{
-    r_print,
-    systems::cmd::{
-        errors::CmdRenderError,
-        renderer::{JVRenderResult, JVResultRenderer},
-    },
-};
-
-pub struct JVResultPrettyJsonRenderer;
-
-impl<T> JVResultRenderer<T> for JVResultPrettyJsonRenderer
-where
-    T: Serialize + Sync,
-{
-    async fn render(data: &T) -> Result<JVRenderResult, CmdRenderError> {
-        let mut r = JVRenderResult::default();
-        let json_string = serde_json::to_string_pretty(data)
-            .map_err(|e| CmdRenderError::SerializeFailed(e.to_string()))?;
-
-        r_print!(r, "{}", json_string);
-
-        Ok(r)
-    }
-}
diff --git a/src/cmds/renderer/status.rs b/src/cmds/renderer/status.rs
index 965ff87..573e74e 100644
--- a/src/cmds/renderer/status.rs
+++ b/src/cmds/renderer/status.rs
@@ -2,40 +2,36 @@ use cli_utils::{
     display::{SimpleTable, md},
     env::auto_update_outdate,
 };
+use render_system_macros::result_renderer;
 use rust_i18n::t;
 
+use crate::cmds::out::status::JVStatusWrongModifyReason;
 use crate::{
-    cmds::out::status::{JVStatusOutput, JVStatusWrongModifyReason},
+    cmds::out::status::JVStatusOutput,
     r_println,
-    systems::cmd::{
-        errors::CmdRenderError,
-        renderer::{JVRenderResult, JVResultRenderer},
-    },
+    systems::{cmd::errors::CmdRenderError, render::renderer::JVRenderResult},
 };
 
-pub struct JVStatusRenderer;
-
 enum Mode {
     StructuralChangesMode,
     ContentChangesMode,
     Clean,
 }
 
-impl JVResultRenderer<JVStatusOutput> for JVStatusRenderer {
-    async fn render(data: &JVStatusOutput) -> Result<JVRenderResult, CmdRenderError> {
-        let mut r = JVRenderResult::default();
+#[result_renderer(JVStatusRenderer)]
+pub async fn render(data: &JVStatusOutput) -> Result<JVRenderResult, CmdRenderError> {
+    let mut r = JVRenderResult::default();
 
-        // Render Header
-        render_header(&mut r, data);
+    // Render Header
+    render_header(&mut r, data);
 
-        // Render Info and Mode
-        render_info_and_mode(&mut r, data);
+    // Render Info and Mode
+    render_info_and_mode(&mut r, data);
 
-        // Render Hint
-        render_hint(&mut r, data);
+    // Render Hint
+    render_hint(&mut r, data);
 
-        Ok(r)
-    }
+    Ok(r)
 }
 
 fn render_header(r: &mut JVRenderResult, data: &JVStatusOutput) {
diff --git a/src/systems.rs b/src/systems.rs
index 52958ec..7f77ca5 100644
--- a/src/systems.rs
+++ b/src/systems.rs
@@ -1 +1,2 @@
 pub mod cmd;
+pub mod render;
diff --git a/src/systems/cmd.rs b/src/systems/cmd.rs
index ea8bbd7..ebfa4f1 100644
--- a/src/systems/cmd.rs
+++ b/src/systems/cmd.rs
@@ -1,6 +1,6 @@
-pub mod _registry;
+pub mod _commands;
 pub mod cmd_system;
 pub mod errors;
+pub mod macros;
 pub mod processer;
-pub mod renderer;
 pub mod workspace_reader;
diff --git a/src/systems/cmd/cmd_system.rs b/src/systems/cmd/cmd_system.rs
index 20f5aef..030e711 100644
--- a/src/systems/cmd/cmd_system.rs
+++ b/src/systems/cmd/cmd_system.rs
@@ -1,64 +1,88 @@
-use serde::Serialize;
-
 use crate::{
     r_println,
-    systems::cmd::{
-        errors::{CmdExecuteError, CmdPrepareError, CmdProcessError, CmdRenderError},
-        renderer::{JVRenderResult, JVResultRenderer},
+    systems::{
+        cmd::errors::{CmdExecuteError, CmdPrepareError, CmdProcessError, CmdRenderError},
+        render::{render_system::render, renderer::JVRenderResult},
     },
 };
-use std::future::Future;
+use std::{
+    any::{Any, TypeId},
+    collections::HashMap,
+    future::Future,
+};
 
 pub struct JVCommandContext {
     pub help: bool,
     pub confirmed: bool,
 }
 
-pub trait JVCommand<Argument, Input, Collect, Output, Renderer>
+pub trait JVCommand<Argument, Input, Collect>
 where
     Argument: clap::Parser + Send,
     Input: Send,
-    Output: Serialize + Send + Sync,
     Collect: Send,
-    Renderer: JVResultRenderer<Output> + Send + Sync,
 {
     /// Get help string for the command
     fn get_help_str() -> String;
 
-    /// Process the command with a specified renderer, performing any necessary post-execution processing
-    fn process_with_renderer_flag(
+    /// Run the command and convert the result into type-agnostic serialized information,
+    /// then hand it over to the universal renderer for rendering.
+    /// Universal renderer: uses the renderer specified by the `--renderer` flag.
+    fn process_to_renderer_override(
         args: Vec<String>,
         ctx: JVCommandContext,
-        renderer: String,
-    ) -> impl Future<Output = Result<JVRenderResult, CmdProcessError>> + Send
-    where
-        Self: Sync,
-    {
+        renderer_override: String,
+    ) -> impl Future<Output = Result<JVRenderResult, CmdProcessError>> + Send {
         async move {
-            let renderer_str = renderer.as_str();
-            include!("_renderers.rs")
+            // If the `--help` flag is used,
+            // skip execution and return an error,
+            // unlike `process_to_render_system`,
+            // when the `--renderer` flag specifies a renderer, `--help` output is not allowed
+            if ctx.help {
+                return Err(CmdProcessError::RendererOverrideButRequestHelp);
+            }
+
+            let (data, type_name) = Self::process(args, ctx).await?;
+
+            let renderer_override = renderer_override.as_str();
+
+            // Serialize the data based on its concrete type
+            let render_result = include!("../render/_override_renderer_entry.rs");
+
+            match render_result {
+                Ok(r) => Ok(r),
+                Err(e) => Err(CmdProcessError::Render(e)),
+            }
         }
     }
 
-    /// performing any necessary post-execution processing
-    fn process(
+    /// Run the command and hand it over to the rendering system
+    /// to select the appropriate renderer for the result
+    fn process_to_render_system(
         args: Vec<String>,
         ctx: JVCommandContext,
-    ) -> impl Future<Output = Result<JVRenderResult, CmdProcessError>> + Send
-    where
-        Self: Sync,
-    {
-        Self::process_with_renderer::<Renderer>(args, ctx)
+    ) -> impl Future<Output = Result<JVRenderResult, CmdProcessError>> + Send {
+        async {
+            // If the `--help` flag is used,
+            // skip execution and directly render help information
+            if ctx.help {
+                let mut r = JVRenderResult::default();
+                r_println!(r, "{}", Self::get_help_str());
+                return Ok(r);
+            }
+
+            let (data, id_str) = Self::process(args, ctx).await?;
+            match render(data, id_str).await {
+                Ok(r) => Ok(r),
+                Err(e) => Err(CmdProcessError::Render(e)),
+            }
+        }
     }
 
-    /// Process the command output with a custom renderer,
-    /// performing any necessary post-execution processing
-    fn process_with_renderer<R: JVResultRenderer<Output> + Send>(
+    fn process(
         args: Vec<String>,
         ctx: JVCommandContext,
-    ) -> impl Future<Output = Result<JVRenderResult, CmdProcessError>> + Send
-    where
-        Self: Sync,
+    ) -> impl Future<Output = Result<(Box<dyn Any + Send + 'static>, String), CmdProcessError>> + Send
     {
         async move {
             let mut full_args = vec!["jv".to_string()];
@@ -70,13 +94,6 @@ where
                 Err(_) => return Err(CmdProcessError::ParseError(Self::get_help_str())),
             };
 
-            // If the help flag is used, skip execution and directly print help
-            if ctx.help {
-                let mut r = JVRenderResult::default();
-                r_println!(r, "{}", Self::get_help_str());
-                return Ok(r);
-            }
-
             let (input, collect) = match tokio::try_join!(
                 Self::prepare(&parsed_args, &ctx),
                 Self::collect(&parsed_args, &ctx)
@@ -85,17 +102,15 @@ where
                 Err(e) => return Err(CmdProcessError::from(e)),
             };
 
-            let output = match Self::exec(input, collect).await {
+            let data = match Self::exec(input, collect).await {
                 Ok(output) => output,
                 Err(e) => return Err(CmdProcessError::from(e)),
             };
 
-            match R::render(&output).await {
-                Ok(r) => Ok(r),
-                Err(e) => Err(CmdProcessError::from(e)),
-            }
+            Ok(data)
         }
     }
+
     /// Prepare
     /// Converts Argument input into parameters readable during the execution phase
     fn prepare(
@@ -116,5 +131,8 @@ where
     fn exec(
         input: Input,
         collect: Collect,
-    ) -> impl Future<Output = Result<Output, CmdExecuteError>> + Send;
+    ) -> impl Future<Output = Result<(Box<dyn Any + Send + 'static>, String), CmdExecuteError>> + Send;
+
+    /// Get output type mapping
+    fn get_output_type_mapping() -> HashMap<String, TypeId>;
 }
diff --git a/src/systems/cmd/errors.rs b/src/systems/cmd/errors.rs
index 358d15a..7ec5e1c 100644
--- a/src/systems/cmd/errors.rs
+++ b/src/systems/cmd/errors.rs
@@ -76,6 +76,12 @@ pub enum CmdRenderError {
 
     #[error("Renderer `{0}` not found")]
     RendererNotFound(String),
+
+    #[error("Type mismatch: expected `{expected:?}`, got `{actual:?}`")]
+    TypeMismatch {
+        expected: std::any::TypeId,
+        actual: std::any::TypeId,
+    },
 }
 
 impl CmdRenderError {
@@ -109,6 +115,12 @@ pub enum CmdProcessError {
 
     #[error("Parse error")]
     ParseError(String),
+
+    #[error("Renderer override mode is active, but user requested help")]
+    RendererOverrideButRequestHelp,
+
+    #[error("Downcast failed")]
+    DowncastFailed,
 }
 
 impl CmdProcessError {
diff --git a/src/systems/cmd/macros.rs b/src/systems/cmd/macros.rs
new file mode 100644
index 0000000..c7d576d
--- /dev/null
+++ b/src/systems/cmd/macros.rs
@@ -0,0 +1,166 @@
+#[macro_export]
+/// # JVCS_CLI Command Definition Macro
+///
+/// ## Import
+///
+/// Add the following macro to your code
+///
+/// ```ignore
+/// crate::command_template!();
+/// ```
+///
+/// Then paste the following content into your code
+///
+/// ```ignore
+/// use cmd_system_macros::exec;
+/// use crate::{
+///     cmd_output,
+///     systems::cmd::{
+///         cmd_system::JVCommandContext,
+///         errors::{CmdExecuteError, CmdPrepareError},
+///         workspace_reader::LocalWorkspaceReader,
+///     },
+/// };
+///
+/// /// Define command type
+/// /// Names should match the file name in the following format:
+/// /// custom.rs matches JVCustomCommand, invoked using `jv custom <args...>`
+/// /// get_data.rs matches JVGetDataCommand, invoked using `jv get data <args...>`
+/// pub struct JVCustomCommand;
+///
+/// /// Command type, should match the definition above
+/// type Cmd = JVCustomCommand;
+///
+/// /// Specify Argument
+/// /// ```ignore
+/// /// #[derive(Parser, Debug)]
+/// /// pub struct JVCustomArgument;
+/// /// ```
+/// type Arg = JVCustomArgument;
+///
+/// /// Specify InputData
+/// /// ```ignore
+/// /// pub struct JVCustomInput;
+/// /// ```
+/// type In = JVCustomInput;
+///
+/// /// Specify CollectData
+/// /// ```ignore
+/// /// pub struct JVCustomCollect;
+/// /// ```
+/// type Collect = JVCustomCollect;
+///
+/// /// Return a string, rendered when the user needs help (command specifies `--help` or syntax error)
+/// fn help_str() -> String {
+///     todo!()
+/// }
+///
+/// /// Preparation phase, preprocess user input and convert to a data format friendly for the execution phase
+/// async fn prepare(args: &Arg, ctx: &JVCommandContext) -> Result<In, CmdPrepareError> {
+///     todo!()
+/// }
+///
+/// /// Collect necessary local information for execution
+/// async fn collect(args: &Arg, ctx: &JVCommandContext) -> Result<Collect, CmdPrepareError> {
+///     let reader = LocalWorkspaceReader::default();
+///     todo!()
+/// }
+///
+/// /// Execution phase, call core layer or other custom logic
+/// #[exec]
+/// async fn exec(
+///     input: In,
+///     collect: Collect,
+/// ) -> Result<(Box<dyn std::any::Any + Send + 'static>, String), CmdExecuteError> {
+///     todo!();
+///
+///     // Use the following method to return results
+///     cmd_output!(output, JVCustomOutput)
+/// }
+/// ```
+///
+/// Of course, you can also use the comment-free version
+///
+/// ```ignore
+/// use cmd_system_macros::exec;
+/// use crate::{
+///     cmd_output,
+///     systems::cmd::{
+///         cmd_system::JVCommandContext,
+///         errors::{CmdExecuteError, CmdPrepareError},
+///         workspace_reader::LocalWorkspaceReader,
+///     },
+/// };
+///
+/// pub struct JVCustomCommand;
+/// type Cmd = JVCustomCommand;
+/// type Arg = JVCustomArgument;
+/// type In = JVCustomInput;
+/// type Collect = JVCustomCollect;
+///
+/// fn help_str() -> String {
+///     todo!()
+/// }
+///
+/// async fn prepare(args: &Arg, ctx: &JVCommandContext) -> Result<In, CmdPrepareError> {
+///     todo!()
+/// }
+///
+/// async fn collect(args: &Arg, ctx: &JVCommandContext) -> Result<Collect, CmdPrepareError> {
+///     let reader = LocalWorkspaceReader::default();
+///     todo!()
+/// }
+///
+/// #[exec]
+/// async fn exec(
+///     input: In,
+///     collect: Collect,
+/// ) -> Result<(Box<dyn std::any::Any + Send + 'static>, String), CmdExecuteError> {
+///     todo!();
+///     cmd_output!(output, JVCustomOutput)
+/// }
+/// ```
+macro_rules! command_template {
+    () => {
+        impl $crate::systems::cmd::cmd_system::JVCommand<Arg, In, Collect> for Cmd {
+            fn get_help_str() -> String {
+                help_str()
+            }
+
+            async fn prepare(
+                args: &Arg,
+                ctx: &$crate::systems::cmd::cmd_system::JVCommandContext,
+            ) -> Result<In, $crate::systems::cmd::errors::CmdPrepareError> {
+                prepare(args, ctx).await
+            }
+
+            async fn collect(
+                args: &Arg,
+                ctx: &$crate::systems::cmd::cmd_system::JVCommandContext,
+            ) -> Result<Collect, $crate::systems::cmd::errors::CmdPrepareError> {
+                collect(args, ctx).await
+            }
+
+            async fn exec(
+                input: In,
+                collect: Collect,
+            ) -> Result<
+                (Box<dyn std::any::Any + Send + 'static>, String),
+                $crate::systems::cmd::errors::CmdExecuteError,
+            > {
+                exec(input, collect).await
+            }
+
+            fn get_output_type_mapping() -> std::collections::HashMap<String, std::any::TypeId> {
+                get_output_type_mapping()
+            }
+        }
+    };
+}
+
+#[macro_export]
+macro_rules! cmd_output {
+    ($v:expr, $t:ty) => {
+        Ok((Box::new($v), stringify!($t).to_string()))
+    };
+}
diff --git a/src/systems/cmd/processer.rs b/src/systems/cmd/processer.rs
index 7c464a2..4bcaaeb 100644
--- a/src/systems/cmd/processer.rs
+++ b/src/systems/cmd/processer.rs
@@ -1,7 +1,7 @@
-use crate::systems::cmd::_registry::{jv_cmd_nodes, jv_cmd_process_node};
+use crate::systems::cmd::_commands::{jv_cmd_nodes, jv_cmd_process_node};
 use crate::systems::cmd::cmd_system::JVCommandContext;
 use crate::systems::cmd::errors::CmdProcessError;
-use crate::systems::cmd::renderer::JVRenderResult;
+use crate::systems::render::renderer::JVRenderResult;
 
 pub async fn jv_cmd_process(
     args: &Vec<String>,
diff --git a/src/systems/render.rs b/src/systems/render.rs
new file mode 100644
index 0000000..8b387e7
--- /dev/null
+++ b/src/systems/render.rs
@@ -0,0 +1,2 @@
+pub mod render_system;
+pub mod renderer;
diff --git a/src/systems/render/render_system.rs b/src/systems/render/render_system.rs
new file mode 100644
index 0000000..7371e7a
--- /dev/null
+++ b/src/systems/render/render_system.rs
@@ -0,0 +1,14 @@
+use std::any::Any;
+
+use crate::systems::{
+    cmd::errors::CmdRenderError,
+    render::renderer::{JVRenderResult, JVResultRenderer},
+};
+
+pub async fn render(
+    data: Box<dyn Any + Send + 'static>,
+    type_name: String,
+) -> Result<JVRenderResult, CmdRenderError> {
+    let type_name_str = type_name.as_str();
+    include!("_specific_renderer_matching.rs")
+}
diff --git a/src/systems/cmd/renderer.rs b/src/systems/render/renderer.rs
index 1849ee9..9060683 100644
--- a/src/systems/cmd/renderer.rs
+++ b/src/systems/render/renderer.rs
@@ -1,16 +1,15 @@
 use std::fmt::{Display, Formatter};
-
-use serde::Serialize;
+use std::future::Future;
 
 use crate::systems::cmd::errors::CmdRenderError;
 
-pub trait JVResultRenderer<Data>
-where
-    Data: Serialize,
-{
+pub trait JVResultRenderer<Data> {
     fn render(
         data: &Data,
     ) -> impl Future<Output = Result<JVRenderResult, CmdRenderError>> + Send + Sync;
+
+    fn get_type_id(&self) -> std::any::TypeId;
+    fn get_data_type_id(&self) -> std::any::TypeId;
 }
 
 #[derive(Default, Debug, PartialEq)]