Yeachan-Heo 5d48e227dc Make model inspection and switching feel more like a real CLI surface
Replace terse /model strings with sectioned model reports that show the active model and preserved session context, and use a structured switch report when the model changes. This keeps the behavior honest while making model management feel more intentional and Claw-like.

Constraint: Model switching must preserve the current session and avoid adding any fake model catalog or validation layer
Rejected: Add a hardcoded model list or aliases | would create drift with actual backend-supported model names
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Keep /model output informational and backend-agnostic unless the runtime gains authoritative model discovery
Tested: cargo fmt --manifest-path ./rust/Cargo.toml --all; cargo clippy --manifest-path ./rust/Cargo.toml --workspace --all-targets -- -D warnings; cargo test --manifest-path ./rust/Cargo.toml --workspace
Not-tested: Manual interactive switching across multiple real Anthropic model names
2026-03-31 20:43:56 +00:00

1508 lines
50 KiB
Rust
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

mod input;
mod render;
use std::env;
use std::fs;
use std::io::{self, Write};
use std::path::{Path, PathBuf};
use api::{
AnthropicClient, ContentBlockDelta, InputContentBlock, InputMessage, MessageRequest,
MessageResponse, OutputContentBlock, StreamEvent as ApiStreamEvent, ToolChoice, ToolDefinition,
ToolResultContentBlock,
};
use commands::{
handle_slash_command, render_slash_command_help, resume_supported_slash_commands, SlashCommand,
};
use compat_harness::{extract_manifest, UpstreamPaths};
use render::{Spinner, TerminalRenderer};
use runtime::{
load_system_prompt, ApiClient, ApiRequest, AssistantEvent, CompactionConfig, ConfigLoader,
ConfigSource, ContentBlock, ConversationMessage, ConversationRuntime, MessageRole,
PermissionMode, PermissionPolicy, ProjectContext, RuntimeError, Session, TokenUsage, ToolError,
ToolExecutor, UsageTracker,
};
use tools::{execute_tool, mvp_tool_specs};
const DEFAULT_MODEL: &str = "claude-sonnet-4-20250514";
const DEFAULT_MAX_TOKENS: u32 = 32;
const DEFAULT_DATE: &str = "2026-03-31";
fn main() {
if let Err(error) = run() {
eprintln!("{error}");
std::process::exit(1);
}
}
fn run() -> Result<(), Box<dyn std::error::Error>> {
let args: Vec<String> = env::args().skip(1).collect();
match parse_args(&args)? {
CliAction::DumpManifests => dump_manifests(),
CliAction::BootstrapPlan => print_bootstrap_plan(),
CliAction::PrintSystemPrompt { cwd, date } => print_system_prompt(cwd, date),
CliAction::ResumeSession {
session_path,
commands,
} => resume_session(&session_path, &commands),
CliAction::Prompt { prompt, model } => LiveCli::new(model, false)?.run_turn(&prompt)?,
CliAction::Repl { model } => run_repl(model)?,
CliAction::Help => print_help(),
}
Ok(())
}
#[derive(Debug, Clone, PartialEq, Eq)]
enum CliAction {
DumpManifests,
BootstrapPlan,
PrintSystemPrompt {
cwd: PathBuf,
date: String,
},
ResumeSession {
session_path: PathBuf,
commands: Vec<String>,
},
Prompt {
prompt: String,
model: String,
},
Repl {
model: String,
},
Help,
}
fn parse_args(args: &[String]) -> Result<CliAction, String> {
let mut model = DEFAULT_MODEL.to_string();
let mut rest = Vec::new();
let mut index = 0;
while index < args.len() {
match args[index].as_str() {
"--model" => {
let value = args
.get(index + 1)
.ok_or_else(|| "missing value for --model".to_string())?;
model.clone_from(value);
index += 2;
}
flag if flag.starts_with("--model=") => {
model = flag[8..].to_string();
index += 1;
}
other => {
rest.push(other.to_string());
index += 1;
}
}
}
if rest.is_empty() {
return Ok(CliAction::Repl { model });
}
if matches!(rest.first().map(String::as_str), Some("--help" | "-h")) {
return Ok(CliAction::Help);
}
if rest.first().map(String::as_str) == Some("--resume") {
return parse_resume_args(&rest[1..]);
}
match rest[0].as_str() {
"dump-manifests" => Ok(CliAction::DumpManifests),
"bootstrap-plan" => Ok(CliAction::BootstrapPlan),
"system-prompt" => parse_system_prompt_args(&rest[1..]),
"prompt" => {
let prompt = rest[1..].join(" ");
if prompt.trim().is_empty() {
return Err("prompt subcommand requires a prompt string".to_string());
}
Ok(CliAction::Prompt { prompt, model })
}
other => Err(format!("unknown subcommand: {other}")),
}
}
fn parse_system_prompt_args(args: &[String]) -> Result<CliAction, String> {
let mut cwd = env::current_dir().map_err(|error| error.to_string())?;
let mut date = DEFAULT_DATE.to_string();
let mut index = 0;
while index < args.len() {
match args[index].as_str() {
"--cwd" => {
let value = args
.get(index + 1)
.ok_or_else(|| "missing value for --cwd".to_string())?;
cwd = PathBuf::from(value);
index += 2;
}
"--date" => {
let value = args
.get(index + 1)
.ok_or_else(|| "missing value for --date".to_string())?;
date.clone_from(value);
index += 2;
}
other => return Err(format!("unknown system-prompt option: {other}")),
}
}
Ok(CliAction::PrintSystemPrompt { cwd, date })
}
fn parse_resume_args(args: &[String]) -> Result<CliAction, String> {
let session_path = args
.first()
.ok_or_else(|| "missing session path for --resume".to_string())
.map(PathBuf::from)?;
let commands = args[1..].to_vec();
if commands
.iter()
.any(|command| !command.trim_start().starts_with('/'))
{
return Err("--resume trailing arguments must be slash commands".to_string());
}
Ok(CliAction::ResumeSession {
session_path,
commands,
})
}
fn dump_manifests() {
let workspace_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("../..");
let paths = UpstreamPaths::from_workspace_dir(&workspace_dir);
match extract_manifest(&paths) {
Ok(manifest) => {
println!("commands: {}", manifest.commands.entries().len());
println!("tools: {}", manifest.tools.entries().len());
println!("bootstrap phases: {}", manifest.bootstrap.phases().len());
}
Err(error) => {
eprintln!("failed to extract manifests: {error}");
std::process::exit(1);
}
}
}
fn print_bootstrap_plan() {
for phase in runtime::BootstrapPlan::claude_code_default().phases() {
println!("- {phase:?}");
}
}
fn print_system_prompt(cwd: PathBuf, date: String) {
match load_system_prompt(cwd, date, env::consts::OS, "unknown") {
Ok(sections) => println!("{}", sections.join("\n\n")),
Err(error) => {
eprintln!("failed to build system prompt: {error}");
std::process::exit(1);
}
}
}
fn resume_session(session_path: &Path, commands: &[String]) {
let session = match Session::load_from_path(session_path) {
Ok(session) => session,
Err(error) => {
eprintln!("failed to restore session: {error}");
std::process::exit(1);
}
};
if commands.is_empty() {
println!(
"Restored session from {} ({} messages).",
session_path.display(),
session.messages.len()
);
return;
}
let mut session = session;
for raw_command in commands {
let Some(command) = SlashCommand::parse(raw_command) else {
eprintln!("unsupported resumed command: {raw_command}");
std::process::exit(2);
};
match run_resume_command(session_path, &session, &command) {
Ok(ResumeCommandOutcome {
session: next_session,
message,
}) => {
session = next_session;
if let Some(message) = message {
println!("{message}");
}
}
Err(error) => {
eprintln!("{error}");
std::process::exit(2);
}
}
}
}
#[derive(Debug, Clone)]
struct ResumeCommandOutcome {
session: Session,
message: Option<String>,
}
#[derive(Debug, Clone)]
struct StatusContext {
cwd: PathBuf,
session_path: Option<PathBuf>,
loaded_config_files: usize,
discovered_config_files: usize,
memory_file_count: usize,
}
#[derive(Debug, Clone, Copy)]
struct StatusUsage {
message_count: usize,
turns: u32,
latest: TokenUsage,
cumulative: TokenUsage,
estimated_tokens: usize,
}
fn format_model_report(model: &str, message_count: usize, turns: u32) -> String {
format!(
"Model
Current model {model}
Session messages {message_count}
Session turns {turns}
Usage
Inspect current model with /model
Switch models with /model <name>"
)
}
fn format_model_switch_report(previous: &str, next: &str, message_count: usize) -> String {
format!(
"Model updated
Previous {previous}
Current {next}
Preserved msgs {message_count}"
)
}
fn run_resume_command(
session_path: &Path,
session: &Session,
command: &SlashCommand,
) -> Result<ResumeCommandOutcome, Box<dyn std::error::Error>> {
match command {
SlashCommand::Help => Ok(ResumeCommandOutcome {
session: session.clone(),
message: Some(render_repl_help()),
}),
SlashCommand::Compact => {
let Some(result) = handle_slash_command(
"/compact",
session,
CompactionConfig {
max_estimated_tokens: 0,
..CompactionConfig::default()
},
) else {
return Ok(ResumeCommandOutcome {
session: session.clone(),
message: None,
});
};
result.session.save_to_path(session_path)?;
Ok(ResumeCommandOutcome {
session: result.session,
message: Some(result.message),
})
}
SlashCommand::Clear { confirm } => {
if !confirm {
return Ok(ResumeCommandOutcome {
session: session.clone(),
message: Some(
"clear: confirmation required; rerun with /clear --confirm".to_string(),
),
});
}
let cleared = Session::new();
cleared.save_to_path(session_path)?;
Ok(ResumeCommandOutcome {
session: cleared,
message: Some(format!(
"Cleared resumed session file {}.",
session_path.display()
)),
})
}
SlashCommand::Status => {
let tracker = UsageTracker::from_session(session);
let usage = tracker.cumulative_usage();
Ok(ResumeCommandOutcome {
session: session.clone(),
message: Some(format_status_report(
"restored-session",
StatusUsage {
message_count: session.messages.len(),
turns: tracker.turns(),
latest: tracker.current_turn_usage(),
cumulative: usage,
estimated_tokens: 0,
},
permission_mode_label(),
&status_context(Some(session_path))?,
)),
})
}
SlashCommand::Cost => {
let usage = UsageTracker::from_session(session).cumulative_usage();
Ok(ResumeCommandOutcome {
session: session.clone(),
message: Some(format!(
"cost: input_tokens={} output_tokens={} cache_creation_tokens={} cache_read_tokens={} total_tokens={}",
usage.input_tokens,
usage.output_tokens,
usage.cache_creation_input_tokens,
usage.cache_read_input_tokens,
usage.total_tokens(),
)),
})
}
SlashCommand::Config => Ok(ResumeCommandOutcome {
session: session.clone(),
message: Some(render_config_report()?),
}),
SlashCommand::Memory => Ok(ResumeCommandOutcome {
session: session.clone(),
message: Some(render_memory_report()?),
}),
SlashCommand::Init => Ok(ResumeCommandOutcome {
session: session.clone(),
message: Some(init_claude_md()?),
}),
SlashCommand::Resume { .. }
| SlashCommand::Model { .. }
| SlashCommand::Permissions { .. }
| SlashCommand::Unknown(_) => Err("unsupported resumed slash command".into()),
}
}
fn run_repl(model: String) -> Result<(), Box<dyn std::error::Error>> {
let mut cli = LiveCli::new(model, true)?;
let editor = input::LineEditor::new(" ");
println!("Rusty Claude CLI interactive mode");
println!("Type /help for commands. Shift+Enter or Ctrl+J inserts a newline.");
while let Some(input) = editor.read_line()? {
let trimmed = input.trim();
if trimmed.is_empty() {
continue;
}
if matches!(trimmed, "/exit" | "/quit") {
break;
}
if let Some(command) = SlashCommand::parse(trimmed) {
cli.handle_repl_command(command)?;
continue;
}
cli.run_turn(trimmed)?;
}
Ok(())
}
struct LiveCli {
model: String,
system_prompt: Vec<String>,
runtime: ConversationRuntime<AnthropicRuntimeClient, CliToolExecutor>,
}
impl LiveCli {
fn new(model: String, enable_tools: bool) -> Result<Self, Box<dyn std::error::Error>> {
let system_prompt = build_system_prompt()?;
let runtime = build_runtime(
Session::new(),
model.clone(),
system_prompt.clone(),
enable_tools,
)?;
Ok(Self {
model,
system_prompt,
runtime,
})
}
fn run_turn(&mut self, input: &str) -> Result<(), Box<dyn std::error::Error>> {
let mut spinner = Spinner::new();
let mut stdout = io::stdout();
spinner.tick(
"Waiting for Claude",
TerminalRenderer::new().color_theme(),
&mut stdout,
)?;
let result = self.runtime.run_turn(input, None);
match result {
Ok(_) => {
spinner.finish(
"Claude response complete",
TerminalRenderer::new().color_theme(),
&mut stdout,
)?;
println!();
Ok(())
}
Err(error) => {
spinner.fail(
"Claude request failed",
TerminalRenderer::new().color_theme(),
&mut stdout,
)?;
Err(Box::new(error))
}
}
}
fn handle_repl_command(
&mut self,
command: SlashCommand,
) -> Result<(), Box<dyn std::error::Error>> {
match command {
SlashCommand::Help => println!("{}", render_repl_help()),
SlashCommand::Status => self.print_status(),
SlashCommand::Compact => self.compact()?,
SlashCommand::Model { model } => self.set_model(model)?,
SlashCommand::Permissions { mode } => self.set_permissions(mode)?,
SlashCommand::Clear { confirm } => self.clear_session(confirm)?,
SlashCommand::Cost => self.print_cost(),
SlashCommand::Resume { session_path } => self.resume_session(session_path)?,
SlashCommand::Config => Self::print_config()?,
SlashCommand::Memory => Self::print_memory()?,
SlashCommand::Init => Self::run_init()?,
SlashCommand::Unknown(name) => eprintln!("unknown slash command: /{name}"),
}
Ok(())
}
fn print_status(&self) {
let cumulative = self.runtime.usage().cumulative_usage();
let latest = self.runtime.usage().current_turn_usage();
println!(
"{}",
format_status_report(
&self.model,
StatusUsage {
message_count: self.runtime.session().messages.len(),
turns: self.runtime.usage().turns(),
latest,
cumulative,
estimated_tokens: self.runtime.estimated_tokens(),
},
permission_mode_label(),
&status_context(None).expect("status context should load"),
)
);
}
fn set_model(&mut self, model: Option<String>) -> Result<(), Box<dyn std::error::Error>> {
let Some(model) = model else {
println!(
"{}",
format_model_report(
&self.model,
self.runtime.session().messages.len(),
self.runtime.usage().turns(),
)
);
return Ok(());
};
if model == self.model {
println!(
"{}",
format_model_report(
&self.model,
self.runtime.session().messages.len(),
self.runtime.usage().turns(),
)
);
return Ok(());
}
let previous = self.model.clone();
let session = self.runtime.session().clone();
let message_count = session.messages.len();
self.runtime = build_runtime(session, model.clone(), self.system_prompt.clone(), true)?;
self.model.clone_from(&model);
println!(
"{}",
format_model_switch_report(&previous, &model, message_count)
);
Ok(())
}
fn set_permissions(&mut self, mode: Option<String>) -> Result<(), Box<dyn std::error::Error>> {
let Some(mode) = mode else {
println!("Current permission mode: {}", permission_mode_label());
return Ok(());
};
let normalized = normalize_permission_mode(&mode).ok_or_else(|| {
format!(
"Unsupported permission mode '{mode}'. Use read-only, workspace-write, or danger-full-access."
)
})?;
if normalized == permission_mode_label() {
println!("Permission mode already set to {normalized}.");
return Ok(());
}
let session = self.runtime.session().clone();
self.runtime = build_runtime_with_permission_mode(
session,
self.model.clone(),
self.system_prompt.clone(),
true,
normalized,
)?;
println!("Switched permission mode to {normalized}.");
Ok(())
}
fn clear_session(&mut self, confirm: bool) -> Result<(), Box<dyn std::error::Error>> {
if !confirm {
println!(
"clear: confirmation required; run /clear --confirm to start a fresh session."
);
return Ok(());
}
self.runtime = build_runtime_with_permission_mode(
Session::new(),
self.model.clone(),
self.system_prompt.clone(),
true,
permission_mode_label(),
)?;
println!("Cleared local session history.");
Ok(())
}
fn print_cost(&self) {
let cumulative = self.runtime.usage().cumulative_usage();
println!(
"cost: input_tokens={} output_tokens={} cache_creation_tokens={} cache_read_tokens={} total_tokens={}",
cumulative.input_tokens,
cumulative.output_tokens,
cumulative.cache_creation_input_tokens,
cumulative.cache_read_input_tokens,
cumulative.total_tokens(),
);
}
fn resume_session(
&mut self,
session_path: Option<String>,
) -> Result<(), Box<dyn std::error::Error>> {
let Some(session_path) = session_path else {
println!("Usage: /resume <session-path>");
return Ok(());
};
let session = Session::load_from_path(&session_path)?;
let message_count = session.messages.len();
self.runtime = build_runtime_with_permission_mode(
session,
self.model.clone(),
self.system_prompt.clone(),
true,
permission_mode_label(),
)?;
println!("Resumed session from {session_path} ({message_count} messages).");
Ok(())
}
fn print_config() -> Result<(), Box<dyn std::error::Error>> {
println!("{}", render_config_report()?);
Ok(())
}
fn print_memory() -> Result<(), Box<dyn std::error::Error>> {
println!("{}", render_memory_report()?);
Ok(())
}
fn run_init() -> Result<(), Box<dyn std::error::Error>> {
println!("{}", init_claude_md()?);
Ok(())
}
fn compact(&mut self) -> Result<(), Box<dyn std::error::Error>> {
let result = self.runtime.compact(CompactionConfig::default());
let removed = result.removed_message_count;
self.runtime = build_runtime_with_permission_mode(
result.compacted_session,
self.model.clone(),
self.system_prompt.clone(),
true,
permission_mode_label(),
)?;
println!("Compacted {removed} messages.");
Ok(())
}
}
fn render_repl_help() -> String {
format!(
"{}
/exit Quit the REPL",
render_slash_command_help()
)
}
fn status_context(
session_path: Option<&Path>,
) -> Result<StatusContext, Box<dyn std::error::Error>> {
let cwd = env::current_dir()?;
let loader = ConfigLoader::default_for(&cwd);
let discovered_config_files = loader.discover().len();
let runtime_config = loader.load()?;
let project_context = ProjectContext::discover(&cwd, DEFAULT_DATE)?;
Ok(StatusContext {
cwd,
session_path: session_path.map(Path::to_path_buf),
loaded_config_files: runtime_config.loaded_entries().len(),
discovered_config_files,
memory_file_count: project_context.instruction_files.len(),
})
}
fn format_status_report(
model: &str,
usage: StatusUsage,
permission_mode: &str,
context: &StatusContext,
) -> String {
[
format!(
"Status
Model {model}
Permission mode {permission_mode}
Messages {}
Turns {}
Estimated tokens {}",
usage.message_count, usage.turns, usage.estimated_tokens,
),
format!(
"Usage
Latest total {}
Cumulative input {}
Cumulative output {}
Cumulative total {}",
usage.latest.total_tokens(),
usage.cumulative.input_tokens,
usage.cumulative.output_tokens,
usage.cumulative.total_tokens(),
),
format!(
"Workspace
Cwd {}
Session {}
Config files loaded {}/{}
Memory files {}",
context.cwd.display(),
context.session_path.as_ref().map_or_else(
|| "live-repl".to_string(),
|path| path.display().to_string()
),
context.loaded_config_files,
context.discovered_config_files,
context.memory_file_count,
),
]
.join(
"
",
)
}
fn render_config_report() -> Result<String, Box<dyn std::error::Error>> {
let cwd = env::current_dir()?;
let loader = ConfigLoader::default_for(&cwd);
let discovered = loader.discover();
let runtime_config = loader.load()?;
let mut lines = vec![
format!(
"Config
Working directory {}
Loaded files {}
Merged keys {}",
cwd.display(),
runtime_config.loaded_entries().len(),
runtime_config.merged().len()
),
"Discovered files".to_string(),
];
for entry in discovered {
let source = match entry.source {
ConfigSource::User => "user",
ConfigSource::Project => "project",
ConfigSource::Local => "local",
};
let status = if runtime_config
.loaded_entries()
.iter()
.any(|loaded_entry| loaded_entry.path == entry.path)
{
"loaded"
} else {
"missing"
};
lines.push(format!(
" {source:<7} {status:<7} {}",
entry.path.display()
));
}
lines.push("Merged JSON".to_string());
lines.push(format!(" {}", runtime_config.as_json().render()));
Ok(lines.join(
"
",
))
}
fn render_memory_report() -> Result<String, Box<dyn std::error::Error>> {
let project_context = ProjectContext::discover(env::current_dir()?, DEFAULT_DATE)?;
let mut lines = vec![format!(
"memory: files={}",
project_context.instruction_files.len()
)];
if project_context.instruction_files.is_empty() {
lines.push(
" No CLAUDE instruction files discovered in the current directory ancestry."
.to_string(),
);
} else {
for file in project_context.instruction_files {
let preview = file.content.lines().next().unwrap_or("").trim();
let preview = if preview.is_empty() {
"<empty>"
} else {
preview
};
lines.push(format!(
" {} ({}) {}",
file.path.display(),
file.content.lines().count(),
preview
));
}
}
Ok(lines.join(
"
",
))
}
fn init_claude_md() -> Result<String, Box<dyn std::error::Error>> {
let cwd = env::current_dir()?;
let claude_md = cwd.join("CLAUDE.md");
if claude_md.exists() {
return Ok(format!(
"init: skipped because {} already exists",
claude_md.display()
));
}
let content = render_init_claude_md(&cwd);
fs::write(&claude_md, content)?;
Ok(format!("init: created {}", claude_md.display()))
}
fn render_init_claude_md(cwd: &Path) -> String {
let mut lines = vec![
"# CLAUDE.md".to_string(),
String::new(),
"This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.".to_string(),
String::new(),
];
let mut command_lines = Vec::new();
if cwd.join("rust").join("Cargo.toml").is_file() {
command_lines.push("- Run Rust verification from `rust/`: `cargo fmt`, `cargo clippy --workspace --all-targets -- -D warnings`, `cargo test --workspace`".to_string());
} else if cwd.join("Cargo.toml").is_file() {
command_lines.push("- Run Rust verification from the repo root: `cargo fmt`, `cargo clippy --workspace --all-targets -- -D warnings`, `cargo test --workspace`".to_string());
}
if cwd.join("tests").is_dir() && cwd.join("src").is_dir() {
command_lines.push("- `src/` and `tests/` are also present; check those surfaces before removing or renaming Python-era compatibility assets.".to_string());
}
if !command_lines.is_empty() {
lines.push("## Verification".to_string());
lines.extend(command_lines);
lines.push(String::new());
}
let mut structure_lines = Vec::new();
if cwd.join("rust").is_dir() {
structure_lines.push(
"- `rust/` contains the Rust workspace and the active CLI/runtime implementation."
.to_string(),
);
}
if cwd.join("src").is_dir() {
structure_lines.push("- `src/` contains the older Python-first workspace artifacts referenced by the repo history and tests.".to_string());
}
if cwd.join("tests").is_dir() {
structure_lines.push("- `tests/` exercises compatibility and porting behavior across the repository surfaces.".to_string());
}
if !structure_lines.is_empty() {
lines.push("## Repository shape".to_string());
lines.extend(structure_lines);
lines.push(String::new());
}
lines.push("## Working agreement".to_string());
lines.push("- Prefer small, reviewable Rust changes and keep slash-command behavior aligned between the shared command registry and the CLI entrypoints.".to_string());
lines.push("- Do not overwrite existing CLAUDE.md content automatically; update it intentionally when repo workflows change.".to_string());
lines.push(String::new());
lines.join(
"
",
)
}
fn normalize_permission_mode(mode: &str) -> Option<&'static str> {
match mode.trim() {
"read-only" => Some("read-only"),
"workspace-write" => Some("workspace-write"),
"danger-full-access" => Some("danger-full-access"),
_ => None,
}
}
fn permission_mode_label() -> &'static str {
match env::var("RUSTY_CLAUDE_PERMISSION_MODE") {
Ok(value) if value == "read-only" => "read-only",
Ok(value) if value == "danger-full-access" => "danger-full-access",
_ => "workspace-write",
}
}
fn build_system_prompt() -> Result<Vec<String>, Box<dyn std::error::Error>> {
Ok(load_system_prompt(
env::current_dir()?,
DEFAULT_DATE,
env::consts::OS,
"unknown",
)?)
}
fn build_runtime(
session: Session,
model: String,
system_prompt: Vec<String>,
enable_tools: bool,
) -> Result<ConversationRuntime<AnthropicRuntimeClient, CliToolExecutor>, Box<dyn std::error::Error>>
{
build_runtime_with_permission_mode(
session,
model,
system_prompt,
enable_tools,
permission_mode_label(),
)
}
fn build_runtime_with_permission_mode(
session: Session,
model: String,
system_prompt: Vec<String>,
enable_tools: bool,
permission_mode: &str,
) -> Result<ConversationRuntime<AnthropicRuntimeClient, CliToolExecutor>, Box<dyn std::error::Error>>
{
Ok(ConversationRuntime::new(
session,
AnthropicRuntimeClient::new(model, enable_tools)?,
CliToolExecutor::new(),
permission_policy(permission_mode),
system_prompt,
))
}
struct AnthropicRuntimeClient {
runtime: tokio::runtime::Runtime,
client: AnthropicClient,
model: String,
enable_tools: bool,
}
impl AnthropicRuntimeClient {
fn new(model: String, enable_tools: bool) -> Result<Self, Box<dyn std::error::Error>> {
Ok(Self {
runtime: tokio::runtime::Runtime::new()?,
client: AnthropicClient::from_env()?,
model,
enable_tools,
})
}
}
impl ApiClient for AnthropicRuntimeClient {
#[allow(clippy::too_many_lines)]
fn stream(&mut self, request: ApiRequest) -> Result<Vec<AssistantEvent>, RuntimeError> {
let message_request = MessageRequest {
model: self.model.clone(),
max_tokens: DEFAULT_MAX_TOKENS,
messages: convert_messages(&request.messages),
system: (!request.system_prompt.is_empty()).then(|| request.system_prompt.join("\n\n")),
tools: self.enable_tools.then(|| {
mvp_tool_specs()
.into_iter()
.map(|spec| ToolDefinition {
name: spec.name.to_string(),
description: Some(spec.description.to_string()),
input_schema: spec.input_schema,
})
.collect()
}),
tool_choice: self.enable_tools.then_some(ToolChoice::Auto),
stream: true,
};
self.runtime.block_on(async {
let mut stream = self
.client
.stream_message(&message_request)
.await
.map_err(|error| RuntimeError::new(error.to_string()))?;
let mut stdout = io::stdout();
let mut events = Vec::new();
let mut pending_tool: Option<(String, String, String)> = None;
let mut saw_stop = false;
while let Some(event) = stream
.next_event()
.await
.map_err(|error| RuntimeError::new(error.to_string()))?
{
match event {
ApiStreamEvent::MessageStart(start) => {
for block in start.message.content {
push_output_block(block, &mut stdout, &mut events, &mut pending_tool)?;
}
}
ApiStreamEvent::ContentBlockStart(start) => {
push_output_block(
start.content_block,
&mut stdout,
&mut events,
&mut pending_tool,
)?;
}
ApiStreamEvent::ContentBlockDelta(delta) => match delta.delta {
ContentBlockDelta::TextDelta { text } => {
if !text.is_empty() {
write!(stdout, "{text}")
.and_then(|()| stdout.flush())
.map_err(|error| RuntimeError::new(error.to_string()))?;
events.push(AssistantEvent::TextDelta(text));
}
}
ContentBlockDelta::InputJsonDelta { partial_json } => {
if let Some((_, _, input)) = &mut pending_tool {
input.push_str(&partial_json);
}
}
},
ApiStreamEvent::ContentBlockStop(_) => {
if let Some((id, name, input)) = pending_tool.take() {
events.push(AssistantEvent::ToolUse { id, name, input });
}
}
ApiStreamEvent::MessageDelta(delta) => {
events.push(AssistantEvent::Usage(TokenUsage {
input_tokens: delta.usage.input_tokens,
output_tokens: delta.usage.output_tokens,
cache_creation_input_tokens: 0,
cache_read_input_tokens: 0,
}));
}
ApiStreamEvent::MessageStop(_) => {
saw_stop = true;
events.push(AssistantEvent::MessageStop);
}
}
}
if !saw_stop
&& events.iter().any(|event| {
matches!(event, AssistantEvent::TextDelta(text) if !text.is_empty())
|| matches!(event, AssistantEvent::ToolUse { .. })
})
{
events.push(AssistantEvent::MessageStop);
}
if events
.iter()
.any(|event| matches!(event, AssistantEvent::MessageStop))
{
return Ok(events);
}
let response = self
.client
.send_message(&MessageRequest {
stream: false,
..message_request.clone()
})
.await
.map_err(|error| RuntimeError::new(error.to_string()))?;
response_to_events(response, &mut stdout)
})
}
}
fn push_output_block(
block: OutputContentBlock,
out: &mut impl Write,
events: &mut Vec<AssistantEvent>,
pending_tool: &mut Option<(String, String, String)>,
) -> Result<(), RuntimeError> {
match block {
OutputContentBlock::Text { text } => {
if !text.is_empty() {
write!(out, "{text}")
.and_then(|()| out.flush())
.map_err(|error| RuntimeError::new(error.to_string()))?;
events.push(AssistantEvent::TextDelta(text));
}
}
OutputContentBlock::ToolUse { id, name, input } => {
*pending_tool = Some((id, name, input.to_string()));
}
}
Ok(())
}
fn response_to_events(
response: MessageResponse,
out: &mut impl Write,
) -> Result<Vec<AssistantEvent>, RuntimeError> {
let mut events = Vec::new();
let mut pending_tool = None;
for block in response.content {
push_output_block(block, out, &mut events, &mut pending_tool)?;
if let Some((id, name, input)) = pending_tool.take() {
events.push(AssistantEvent::ToolUse { id, name, input });
}
}
events.push(AssistantEvent::Usage(TokenUsage {
input_tokens: response.usage.input_tokens,
output_tokens: response.usage.output_tokens,
cache_creation_input_tokens: response.usage.cache_creation_input_tokens,
cache_read_input_tokens: response.usage.cache_read_input_tokens,
}));
events.push(AssistantEvent::MessageStop);
Ok(events)
}
struct CliToolExecutor {
renderer: TerminalRenderer,
}
impl CliToolExecutor {
fn new() -> Self {
Self {
renderer: TerminalRenderer::new(),
}
}
}
impl ToolExecutor for CliToolExecutor {
fn execute(&mut self, tool_name: &str, input: &str) -> Result<String, ToolError> {
let value = serde_json::from_str(input)
.map_err(|error| ToolError::new(format!("invalid tool input JSON: {error}")))?;
match execute_tool(tool_name, &value) {
Ok(output) => {
let markdown = format!("### Tool `{tool_name}`\n\n```json\n{output}\n```\n");
self.renderer
.stream_markdown(&markdown, &mut io::stdout())
.map_err(|error| ToolError::new(error.to_string()))?;
Ok(output)
}
Err(error) => Err(ToolError::new(error)),
}
}
}
fn permission_policy(mode: &str) -> PermissionPolicy {
if normalize_permission_mode(mode) == Some("read-only") {
PermissionPolicy::new(PermissionMode::Deny)
.with_tool_mode("read_file", PermissionMode::Allow)
.with_tool_mode("glob_search", PermissionMode::Allow)
.with_tool_mode("grep_search", PermissionMode::Allow)
} else {
PermissionPolicy::new(PermissionMode::Allow)
}
}
fn convert_messages(messages: &[ConversationMessage]) -> Vec<InputMessage> {
messages
.iter()
.filter_map(|message| {
let role = match message.role {
MessageRole::System | MessageRole::User | MessageRole::Tool => "user",
MessageRole::Assistant => "assistant",
};
let content = message
.blocks
.iter()
.map(|block| match block {
ContentBlock::Text { text } => InputContentBlock::Text { text: text.clone() },
ContentBlock::ToolUse { id, name, input } => InputContentBlock::ToolUse {
id: id.clone(),
name: name.clone(),
input: serde_json::from_str(input)
.unwrap_or_else(|_| serde_json::json!({ "raw": input })),
},
ContentBlock::ToolResult {
tool_use_id,
output,
is_error,
..
} => InputContentBlock::ToolResult {
tool_use_id: tool_use_id.clone(),
content: vec![ToolResultContentBlock::Text {
text: output.clone(),
}],
is_error: *is_error,
},
})
.collect::<Vec<_>>();
(!content.is_empty()).then(|| InputMessage {
role: role.to_string(),
content,
})
})
.collect()
}
fn print_help() {
println!("rusty-claude-cli");
println!();
println!("Usage:");
println!(" rusty-claude-cli [--model MODEL]");
println!(" Start interactive REPL");
println!(" rusty-claude-cli [--model MODEL] prompt TEXT");
println!(" Send one prompt and stream the response");
println!(" rusty-claude-cli --resume SESSION.json [/status] [/compact] [...]");
println!(" Inspect or maintain a saved session without entering the REPL");
println!(" rusty-claude-cli dump-manifests");
println!(" rusty-claude-cli bootstrap-plan");
println!(" rusty-claude-cli system-prompt [--cwd PATH] [--date YYYY-MM-DD]");
println!();
println!("Interactive slash commands:");
println!("{}", render_slash_command_help());
println!();
let resume_commands = resume_supported_slash_commands()
.into_iter()
.map(|spec| match spec.argument_hint {
Some(argument_hint) => format!("/{} {}", spec.name, argument_hint),
None => format!("/{}", spec.name),
})
.collect::<Vec<_>>()
.join(", ");
println!("Resume-safe commands: {resume_commands}");
println!("Examples:");
println!(" rusty-claude-cli --resume session.json /status /compact /cost");
println!(" rusty-claude-cli --resume session.json /memory /config");
}
#[cfg(test)]
mod tests {
use super::{
format_model_report, format_model_switch_report, format_status_report,
normalize_permission_mode, parse_args, render_init_claude_md, render_repl_help,
resume_supported_slash_commands, status_context, CliAction, SlashCommand, StatusUsage,
DEFAULT_MODEL,
};
use runtime::{ContentBlock, ConversationMessage, MessageRole};
use std::path::{Path, PathBuf};
#[test]
fn defaults_to_repl_when_no_args() {
assert_eq!(
parse_args(&[]).expect("args should parse"),
CliAction::Repl {
model: DEFAULT_MODEL.to_string(),
}
);
}
#[test]
fn parses_prompt_subcommand() {
let args = vec![
"prompt".to_string(),
"hello".to_string(),
"world".to_string(),
];
assert_eq!(
parse_args(&args).expect("args should parse"),
CliAction::Prompt {
prompt: "hello world".to_string(),
model: DEFAULT_MODEL.to_string(),
}
);
}
#[test]
fn parses_system_prompt_options() {
let args = vec![
"system-prompt".to_string(),
"--cwd".to_string(),
"/tmp/project".to_string(),
"--date".to_string(),
"2026-04-01".to_string(),
];
assert_eq!(
parse_args(&args).expect("args should parse"),
CliAction::PrintSystemPrompt {
cwd: PathBuf::from("/tmp/project"),
date: "2026-04-01".to_string(),
}
);
}
#[test]
fn parses_resume_flag_with_slash_command() {
let args = vec![
"--resume".to_string(),
"session.json".to_string(),
"/compact".to_string(),
];
assert_eq!(
parse_args(&args).expect("args should parse"),
CliAction::ResumeSession {
session_path: PathBuf::from("session.json"),
commands: vec!["/compact".to_string()],
}
);
}
#[test]
fn parses_resume_flag_with_multiple_slash_commands() {
let args = vec![
"--resume".to_string(),
"session.json".to_string(),
"/status".to_string(),
"/compact".to_string(),
"/cost".to_string(),
];
assert_eq!(
parse_args(&args).expect("args should parse"),
CliAction::ResumeSession {
session_path: PathBuf::from("session.json"),
commands: vec![
"/status".to_string(),
"/compact".to_string(),
"/cost".to_string(),
],
}
);
}
#[test]
fn repl_help_includes_shared_commands_and_exit() {
let help = render_repl_help();
assert!(help.contains("/help"));
assert!(help.contains("/status"));
assert!(help.contains("/model [model]"));
assert!(help.contains("/permissions [read-only|workspace-write|danger-full-access]"));
assert!(help.contains("/clear [--confirm]"));
assert!(help.contains("/cost"));
assert!(help.contains("/resume <session-path>"));
assert!(help.contains("/config"));
assert!(help.contains("/memory"));
assert!(help.contains("/init"));
assert!(help.contains("/exit"));
}
#[test]
fn resume_supported_command_list_matches_expected_surface() {
let names = resume_supported_slash_commands()
.into_iter()
.map(|spec| spec.name)
.collect::<Vec<_>>();
assert_eq!(
names,
vec!["help", "status", "compact", "clear", "cost", "config", "memory", "init",]
);
}
#[test]
fn model_report_uses_sectioned_layout() {
let report = format_model_report("claude-sonnet", 12, 4);
assert!(report.contains("Model"));
assert!(report.contains("Current model claude-sonnet"));
assert!(report.contains("Session messages 12"));
assert!(report.contains("Switch models with /model <name>"));
}
#[test]
fn model_switch_report_preserves_context_summary() {
let report = format_model_switch_report("claude-sonnet", "claude-opus", 9);
assert!(report.contains("Model updated"));
assert!(report.contains("Previous claude-sonnet"));
assert!(report.contains("Current claude-opus"));
assert!(report.contains("Preserved msgs 9"));
}
#[test]
fn status_line_reports_model_and_token_totals() {
let status = format_status_report(
"claude-sonnet",
StatusUsage {
message_count: 7,
turns: 3,
latest: runtime::TokenUsage {
input_tokens: 5,
output_tokens: 4,
cache_creation_input_tokens: 1,
cache_read_input_tokens: 0,
},
cumulative: runtime::TokenUsage {
input_tokens: 20,
output_tokens: 8,
cache_creation_input_tokens: 2,
cache_read_input_tokens: 1,
},
estimated_tokens: 128,
},
"workspace-write",
&super::StatusContext {
cwd: PathBuf::from("/tmp/project"),
session_path: Some(PathBuf::from("session.json")),
loaded_config_files: 2,
discovered_config_files: 3,
memory_file_count: 4,
},
);
assert!(status.contains("Status"));
assert!(status.contains("Model claude-sonnet"));
assert!(status.contains("Permission mode workspace-write"));
assert!(status.contains("Messages 7"));
assert!(status.contains("Latest total 10"));
assert!(status.contains("Cumulative total 31"));
assert!(status.contains("Cwd /tmp/project"));
assert!(status.contains("Session session.json"));
assert!(status.contains("Config files loaded 2/3"));
assert!(status.contains("Memory files 4"));
}
#[test]
fn config_report_uses_sectioned_layout() {
let report = super::render_config_report().expect("config report should render");
assert!(report.contains("Config"));
assert!(report.contains("Discovered files"));
assert!(report.contains("Merged JSON"));
}
#[test]
fn status_context_reads_real_workspace_metadata() {
let context = status_context(None).expect("status context should load");
assert!(context.cwd.is_absolute());
assert_eq!(context.discovered_config_files, 3);
assert!(context.loaded_config_files <= context.discovered_config_files);
}
#[test]
fn normalizes_supported_permission_modes() {
assert_eq!(normalize_permission_mode("read-only"), Some("read-only"));
assert_eq!(
normalize_permission_mode("workspace-write"),
Some("workspace-write")
);
assert_eq!(
normalize_permission_mode("danger-full-access"),
Some("danger-full-access")
);
assert_eq!(normalize_permission_mode("unknown"), None);
}
#[test]
fn clear_command_requires_explicit_confirmation_flag() {
assert_eq!(
SlashCommand::parse("/clear"),
Some(SlashCommand::Clear { confirm: false })
);
assert_eq!(
SlashCommand::parse("/clear --confirm"),
Some(SlashCommand::Clear { confirm: true })
);
}
#[test]
fn parses_resume_and_config_slash_commands() {
assert_eq!(
SlashCommand::parse("/resume saved-session.json"),
Some(SlashCommand::Resume {
session_path: Some("saved-session.json".to_string())
})
);
assert_eq!(
SlashCommand::parse("/clear --confirm"),
Some(SlashCommand::Clear { confirm: true })
);
assert_eq!(SlashCommand::parse("/config"), Some(SlashCommand::Config));
assert_eq!(SlashCommand::parse("/memory"), Some(SlashCommand::Memory));
assert_eq!(SlashCommand::parse("/init"), Some(SlashCommand::Init));
}
#[test]
fn init_template_mentions_detected_rust_workspace() {
let rendered = render_init_claude_md(Path::new("."));
assert!(rendered.contains("# CLAUDE.md"));
assert!(rendered.contains("cargo clippy --workspace --all-targets -- -D warnings"));
}
#[test]
fn converts_tool_roundtrip_messages() {
let messages = vec![
ConversationMessage::user_text("hello"),
ConversationMessage::assistant(vec![ContentBlock::ToolUse {
id: "tool-1".to_string(),
name: "bash".to_string(),
input: "{\"command\":\"pwd\"}".to_string(),
}]),
ConversationMessage {
role: MessageRole::Tool,
blocks: vec![ContentBlock::ToolResult {
tool_use_id: "tool-1".to_string(),
tool_name: "bash".to_string(),
output: "ok".to_string(),
is_error: false,
}],
usage: None,
},
];
let converted = super::convert_messages(&messages);
assert_eq!(converted.len(), 3);
assert_eq!(converted[1].role, "assistant");
assert_eq!(converted[2].role, "user");
}
}