> ## Documentation Index > Fetch the complete documentation index at: https://mintlify.com/yocxy2/claurst/llms.txt > Use this file to discover all available pages before exploring further. # Crate reference > Full reference for the 11 workspace crates that make up the Claurst Rust implementation. The Claurst workspace is a Cargo workspace with `resolver = "2"`, edition `2021`, and version `1.0.0` across all member crates. Every crate lives under `src-rust/crates/`. ## Dependency flow ``` cli → query → tools → core ↓ ↗ api → core ↓ commands → core ↓ tui → core ↓ mcp → core ↓ bridge → core ``` `cc-core` is the shared foundation consumed by every other crate. `claude-code` (the binary) sits at the top and wires everything together. *** ## Crates **Package:** `cc-core`\ **Path:** `crates/core`\ **Type:** Library Central shared crate. Defines all types consumed by every other crate. Contains 9 inline submodules. ### Key types | Type | Module | Description | | ----------------------- | ------------- | ---------------------------------------------------------------------------------------------------- | | `ClaudeError` | `error` | Typed error enum — API, auth, permission, I/O, rate-limit, context-limit, and more | | `Config` | `config` | Runtime configuration struct (model, max tokens, permission mode, hooks, MCP servers, etc.) | | `PermissionMode` | `config` | `Default` \| `AcceptEdits` \| `BypassPermissions` \| `Plan` | | `OutputFormat` | `config` | `Text` \| `Json` \| `StreamJson` | | `HookEvent` | `config` | `PreToolUse` \| `PostToolUse` \| `Stop` \| `UserPromptSubmit` \| `Notification` | | `HookEntry` | `config` | `{ command, tool_filter, blocking }` | | `Settings` | `config` | Persisted user preferences at `~/.claude/settings.json` | | `McpServerConfig` | `config` | Per-server MCP configuration | | `Role` | `types` | `User` \| `Assistant` | | `ContentBlock` | `types` | Untagged enum — `Text`, `Image`, `ToolUse`, `ToolResult`, `Thinking`, `RedactedThinking`, `Document` | | `Message` | `types` | `{ role, content }` with convenience constructors and accessors | | `UsageInfo` | `types` | Token counts — input, output, cache creation, cache read | | `ToolDefinition` | `types` | `{ name, description, input_schema }` | | `PermissionDecision` | `permissions` | `Allow` \| `AllowPermanently` \| `Deny` \| `DenyPermanently` | | `PermissionHandler` | `permissions` | Trait for permission checks and requests | | `AutoPermissionHandler` | `permissions` | Non-interactive handler — gates operations by `PermissionMode` | | `ConversationSession` | `history` | Session with UUID, timestamps, messages, model, title, and working directory | | `CostTracker` | `cost` | Lock-free token and cost accumulator using `AtomicU64` | | `HookContext` | `hooks` | Context passed to hook shell commands as JSON on stdin | | `HookOutcome` | `hooks` | `Allowed` \| `Blocked(String)` \| `Modified(Value)` | | `ContextBuilder` | `context` | Builds system and user context strings from git state and CLAUDE.md discovery | ### Selected constants (`cc-core::constants`) | Constant | Value | | --------------------------- | ----------------------------------------------------------------------------------------- | | `DEFAULT_MODEL` | `"claude-opus-4-6"` | | `SONNET_MODEL` | `"claude-sonnet-4-6"` | | `HAIKU_MODEL` | `"claude-haiku-4-5-20251001"` | | `DEFAULT_MAX_TOKENS` | `32_000` | | `MAX_TOKENS_HARD_LIMIT` | `65_536` | | `DEFAULT_COMPACT_THRESHOLD` | `0.9` | | `ANTHROPIC_API_BASE` | `"https://api.anthropic.com"` | | `ANTHROPIC_API_VERSION` | `"2023-06-01"` | | `ANTHROPIC_BETA_HEADER` | `"interleaved-thinking-2025-05-14,token-efficient-tools-2025-02-19,files-api-2025-04-14"` | | `CLAUDE_MD_FILENAME` | `"CLAUDE.md"` | | `CONFIG_DIR_NAME` | `".claude"` | ### Key dependencies `thiserror`, `serde`, `serde_json`, `tokio`, `chrono`, `once_cell`, `glob`, `walkdir`, `uuid` **Package:** `cc-api`\ **Path:** `crates/api`\ **Type:** Library Complete async Messages API client with SSE streaming support. Corresponds to the TypeScript `src/services/api/` layer. ### Key types | Type | Module | Description | | ----------------------------- | ------------ | ------------------------------------------------------------------------------------------------------------------------------------------ | | `AnthropicClient` | `client` | Main API client — validates key, builds `reqwest::Client` with rustls-tls, sets `anthropic-version` and `anthropic-beta` headers | | `ClientConfig` | `client` | `{ api_key, api_base, timeout_secs, max_retries }` | | `CreateMessageRequest` | `types` | Full request type — model, max\_tokens, messages, system, tools, temperature, thinking, stream | | `CreateMessageRequestBuilder` | `types` | Fluent builder for `CreateMessageRequest` | | `ThinkingConfig` | `types` | `{ type: "enabled", budget_tokens: u32 }` | | `SystemPrompt` | `types` | `Text(String)` or `Blocks(Vec)` for prompt caching | | `CacheControl` | `types` | `{ type: "ephemeral" }` — applied automatically to the last tool definition | | `ApiMessage` | `types` | `{ role, content }` — `From<&Message>` conversion included | | `StreamEvent` | `streaming` | Tagged enum — `MessageStart`, `MessageDelta`, `MessageStop`, `ContentBlockStart`, `ContentBlockDelta`, `ContentBlockStop`, `Ping`, `Error` | | `ContentDelta` | `streaming` | `TextDelta`, `InputJsonDelta`, `ThinkingDelta`, `SignatureDelta` | | `StreamHandler` | `streaming` | Trait called for each SSE event | | `StreamAccumulator` | `streaming` | Collects stream events into a complete `(Message, UsageInfo, stop_reason)` | | `SseLineParser` | `sse_parser` | Stateful line-by-line SSE parser | ### Retry and backoff `send_with_retry` retries on HTTP 429 and 529 with exponential backoff: initial delay 1 s, 2× multiplier, capped at 60 s, max 5 attempts. Honors the `Retry-After` response header. ### Prompt caching `CacheControl::ephemeral()` is automatically applied to system prompt blocks (when using `SystemPrompt::Blocks`) and to the last tool definition in the tools list. ### Key dependencies `reqwest`, `reqwest-eventsource`, `tokio`, `serde`, `serde_json`, `base64`, `cc-core` **Package:** `cc-tools`\ **Path:** `crates/tools`\ **Type:** Library Implements all 33 built-in tools. Each tool is a zero-sized struct implementing the `Tool` trait. JSON schemas are generated with `schemars`. ### Core trait and registry | Symbol | Description | | ----------------- | ------------------------------------------------------------------------------------------------------------------- | | `Tool` | Async trait — `name`, `description`, `permission_level`, `input_schema`, `execute`, `to_definition` | | `ToolResult` | `{ content, is_error, metadata }` — `ToolResult::success(content)` / `ToolResult::error(content)` | | `PermissionLevel` | `None` \| `ReadOnly` \| `Write` \| `Execute` \| `Dangerous` | | `ToolContext` | Execution context — working dir, permission mode, permission handler, cost tracker, session ID, MCP manager, config | | `all_tools()` | Returns all 33 tools as `Vec>` | | `find_tool(name)` | Finds a tool by exact name | ### Implemented tools | Tool struct | Name constant | Permission | | ---------------------- | ------------------ | ---------- | | `BashTool` | `Bash` | `Execute` | | `FileReadTool` | `Read` | `ReadOnly` | | `FileEditTool` | `Edit` | `Write` | | `FileWriteTool` | `Write` | `Write` | | `GlobTool` | `Glob` | `ReadOnly` | | `GrepTool` | `Grep` | `ReadOnly` | | `WebFetchTool` | `WebFetch` | `ReadOnly` | | `WebSearchTool` | `WebSearch` | `ReadOnly` | | `NotebookEditTool` | `NotebookEdit` | `Write` | | `TaskCreateTool` | `TaskCreate` | `None` | | `TaskGetTool` | `TaskGet` | `None` | | `TaskUpdateTool` | `TaskUpdate` | `None` | | `TaskListTool` | `TaskList` | `None` | | `TaskStopTool` | `TaskStop` | `None` | | `TaskOutputTool` | `TaskOutput` | `None` | | `CronCreateTool` | `CronCreate` | `None` | | `CronDeleteTool` | `CronDelete` | `None` | | `CronListTool` | `CronList` | `None` | | `TodoWriteTool` | `TodoWrite` | `None` | | `AskUserQuestionTool` | `AskUserQuestion` | `None` | | `EnterPlanModeTool` | `EnterPlanMode` | `None` | | `ExitPlanModeTool` | `ExitPlanMode` | `None` | | `PowerShellTool` | `PowerShell` | `Execute` | | `EnterWorktreeTool` | `EnterWorktree` | `Execute` | | `ExitWorktreeTool` | `ExitWorktree` | `Execute` | | `SendMessageTool` | `SendMessage` | `None` | | `SkillTool` | `Skill` | `None` | | `SleepTool` | `Sleep` | `None` | | `ToolSearchTool` | `ToolSearch` | `None` | | `BriefTool` | `Brief` | `None` | | `ConfigTool` | `Config` | `None` | | `ListMcpResourcesTool` | `ListMcpResources` | `None` | | `ReadMcpResourceTool` | `ReadMcpResource` | `None` | ### Global singletons | Singleton | Type | Crate file | | ------------------ | ---------------------------------------------- | ----------------- | | `TASK_STORE` | `Lazy>>` | `tasks.rs` | | `INBOX` | `Lazy>>` | `send_message.rs` | | `CRON_STORE` | `Lazy>>>` | `cron.rs` | | `WORKTREE_SESSION` | `Lazy>>>` | `worktree.rs` | ### Key dependencies `schemars`, `tokio`, `regex`, `walkdir`, `glob`, `reqwest`, `serde_json`, `dashmap`, `cc-core`, `cc-mcp` **Package:** `cc-query`\ **Path:** `crates/query`\ **Type:** Library The core agentic query loop. Drives the multi-turn conversation with the API, executes tools, manages context compaction, and runs the background cron scheduler. ### Key types | Type | Description | | ------------------- | ------------------------------------------------------------------------------------------ | | `QueryOutcome` | `EndTurn` \| `MaxTokens` \| `Cancelled` \| `Error(ClaudeError)` | | `QueryConfig` | Model, max tokens, max turns, system prompt, thinking budget, temperature | | `QueryEvent` | `Stream(StreamEvent)` \| `ToolStart` \| `ToolEnd` \| `TurnComplete` \| `Status` \| `Error` | | `AutoCompactState` | Tracks compaction count, consecutive failures, and circuit-breaker disabled flag | | `TokenWarningState` | `Ok` \| `Warning` \| `Critical` | ### Key functions | Function | Description | | ----------------------------- | --------------------------------------------------------------------------------------------------- | | `run_query_loop(...)` | Main agentic loop — drives multi-turn conversation, executes tools, fires hooks, handles compaction | | `run_single_query(...)` | Single non-agentic API call, no tool loop | | `auto_compact_if_needed(...)` | Triggers context compaction when token use exceeds 90% of the context window | | `compact_conversation(...)` | Splits conversation into head + tail, summarizes head, returns compacted history | | `start_cron_scheduler(...)` | Spawns background task that fires due cron jobs as sub-queries | ### `AgentTool` (`agent_tool.rs`) The sub-agent tool (`Task`) lives in this crate rather than `cc-tools` because it must call `run_query_loop` recursively. It always excludes itself from the child tool list to prevent infinite recursion. ### Auto-compact constants | Constant | Value | | --------------------------------- | -------- | | `AUTOCOMPACT_TRIGGER_FRACTION` | `0.90` | | `AUTOCOMPACT_BUFFER_TOKENS` | `13_000` | | `WARNING_THRESHOLD_BUFFER_TOKENS` | `20_000` | | `KEEP_RECENT_MESSAGES` | `10` | | `MAX_CONSECUTIVE_FAILURES` | `3` | ### Key dependencies `tokio`, `tokio-util`, `cc-core`, `cc-api`, `cc-tools`, `cc-mcp` **Package:** `cc-tui`\ **Path:** `crates/tui`\ **Type:** Library Terminal UI built on `ratatui` + `crossterm`. Replaces the TypeScript `ink`/React rendering layer with immediate-mode rendering. ### Key types | Type | Description | | ----- | ---------------------------------------------------------------------------------------------------- | | `App` | Top-level application state — messages, input, history, scroll offset, streaming state, cost tracker | | `Tui` | Terminal handle wrapping `CrosstermBackend` | ### Key functions | Function | Description | | ------------------------------- | --------------------------------------------------------------------------------------- | | `setup_terminal()` | Enables raw mode, enters alternate screen, returns `Terminal>` | | `restore_terminal(...)` | Disables raw mode, leaves alternate screen, shows cursor | | `render_app(f, app)` | Immediate-mode render — messages area, input area (3 rows), status bar (1 row) | | `render_permission_dialog(...)` | Centered popup overlay with question and numbered options | | `render_spinner(...)` | Braille spinner (`⠋⠙⠹⠸⠼⠴⠦⠧⠇⠏`) indexed by frame count | | `App::handle_key_event(...)` | Keyboard handler — Ctrl+C, Ctrl+D, Enter, Up/Down history, PageUp/Down scroll, F1 help | | `App::handle_query_event(...)` | Updates TUI state from `QueryEvent` — streaming text, tool status, turn completion | | `is_slash_command(input)` | Returns true if input starts with `"/"` | | `parse_slash_command(input)` | Splits `"/name args"` into `("name", "args")` | ### Rendering colors | Element | Color | | ------------------------ | ------------- | | User messages | Cyan | | Assistant messages | Green | | Streaming (partial) text | Yellow italic | | Status bar | Dark gray | ### Key dependencies `ratatui`, `crossterm`, `syntect`, `unicode-width`, `cc-core`, `cc-query` **Package:** `cc-commands`\ **Path:** `crates/commands`\ **Type:** Library Slash command implementations for the interactive REPL. Corresponds to the TypeScript `src/commands/` directory. ### Core types | Type | Description | | ---------------- | --------------------------------------------------------------------------------------------------------------------- | | `SlashCommand` | Async trait — `name`, `aliases`, `description`, `help`, `hidden`, `execute` | | `CommandContext` | `{ config, cost_tracker, messages, working_dir }` | | `CommandResult` | `Message` \| `UserMessage` \| `ConfigChange` \| `ClearConversation` \| `SetMessages` \| `Exit` \| `Silent` \| `Error` | ### Registry functions | Function | Description | | ----------------------------- | --------------------------------------------------------------- | | `all_commands()` | Returns all built-in slash commands | | `find_command(name)` | Finds by name or alias | | `execute_command(input, ctx)` | Parses and executes a slash command; returns `None` if no match | ### Implemented commands | Command | Aliases | Description | | ------------- | ----------- | -------------------------------- | | `help` | `h`, `?` | List available slash commands | | `clear` | `cls` | Clear conversation history | | `compact` | — | Manually compact conversation | | `cost` | — | Show current session cost | | `exit` | `quit`, `q` | Exit the REPL | | `model` | — | Show or change the current model | | `config` | — | Show or update configuration | | `version` | — | Show version information | | `resume` | — | Resume a previous conversation | | `status` | — | Show session status | | `diff` | — | Show file diffs | | `memory` | — | Manage CLAUDE.md memories | | `bug` | — | File a bug report | | `doctor` | — | Run diagnostics | | `login` | — | Authenticate | | `logout` | — | Clear authentication | | `init` | — | Initialize project CLAUDE.md | | `review` | — | Code review workflow | | `hooks` | — | Manage event hooks | | `mcp` | — | Manage MCP servers | | `permissions` | — | Show or edit permissions | | `plan` | — | Enter or exit plan mode | | `tasks` | — | View background tasks | | `session` | — | Session management | | `thinking` | — | Toggle extended thinking | | `export` | — | Export conversation | | `skills` | — | List or manage skills | | `rewind` | — | Rewind conversation state | | `stats` | — | Show usage statistics | | `files` | — | List context files | | `rename` | — | Rename the current session | | `effort` | — | Set effort/thinking level | | `summary` | — | Summarize conversation | | `commit` | — | Run git commit workflow | ### Key dependencies `async-trait`, `tokio`, `cc-core`, `cc-query` **Package:** `cc-mcp`\ **Path:** `crates/mcp`\ **Type:** Library Full MCP (Model Context Protocol) client over JSON-RPC 2.0 + stdio subprocess transport. Implements protocol version `2024-11-05`. ### Key types | Type | Description | | -------------------- | -------------------------------------------------------------------------------------------- | | `McpClient` | Single server connection — connects, initializes, lists tools/resources/prompts | | `McpManager` | Manages multiple named server connections; namespaces tools as `"{server_name}_{tool_name}"` | | `StdioTransport` | Subprocess transport — spawns command, pipes stdin/stdout, background reader task | | `McpTool` | `{ name, description, input_schema }` — `From<&McpTool> for ToolDefinition` | | `McpResource` | `{ uri, name, description, mime_type }` | | `McpContent` | Tagged enum — `Text`, `Image`, `Resource` | | `CallToolResult` | `{ content: Vec, is_error: Option }` | | `JsonRpcRequest` | `{ jsonrpc: "2.0", method, params, id }` | | `JsonRpcResponse` | `{ jsonrpc: "2.0", id, result, error }` | | `InitializeParams` | `{ protocol_version: "2024-11-05", capabilities, client_info }` | | `ServerCapabilities` | `{ tools, resources, prompts }` | ### `McpManager` operations | Method | Description | | -------------------------------- | ------------------------------------------------------------ | | `connect_all(configs)` | Connects all configured servers; logs warnings on failure | | `all_tool_definitions()` | Aggregates tools from all servers, prefixed with server name | | `call_tool(prefixed_name, args)` | Routes to the correct server after stripping prefix | | `list_all_resources()` | Aggregates resources from all connected servers | | `read_resource(uri)` | Tries each server until one returns a result | ### Key dependencies `tokio`, `serde`, `serde_json`, `cc-core` **Package:** `cc-bridge`\ **Path:** `crates/bridge`\ **Type:** Library Implements the bridge protocol connecting the local CLI to the claude.ai web UI. Enables remote control from a browser session via long polling. ### Key types | Type | Description | | --------------- | ----------------------------------------------------------------------------------------------------------- | | `BridgeClient` | Main bridge client — manages state, channels, and polling loop | | `BridgeConfig` | `{ enabled, server_url, device_id, session_token, polling_interval_ms, max_reconnect_attempts }` | | `BridgeMessage` | Server → client — `UserMessage`, `PermissionResponse`, `Cancel`, `Ping` | | `BridgeEvent` | Client → server — `TextDelta`, `ToolStart`, `ToolEnd`, `PermissionRequest`, `TurnComplete`, `Error`, `Pong` | | `BridgeState` | `Connecting` \| `Connected` \| `Reconnecting { attempt }` \| `Disconnected` | | `JwtClaims` | `{ sub, exp, iat, device_id }` — parsed from session token | ### Transport The polling loop long-polls `{server_url}/sessions/{id}/poll` for incoming messages and flushes outgoing `BridgeEvent` items to `{server_url}/sessions/{id}/events`. Exponential backoff on network errors; disconnects on 401/403. ### Work modes Supported work modes (from README): `single-session`, `worktree`, `same-dir`. ### Key dependencies `reqwest`, `tokio`, `serde`, `serde_json`, `base64`, `sha2`, `hex`, `cc-core` **Package:** `cc-buddy`\ **Path:** `crates/buddy`\ **Type:** Library `cc-buddy` is compiled only when the `BUDDY` feature flag is enabled. It is absent from standard external builds. Tamagotchi-style companion pet system. Provides species hatching, ASCII art sprites, procedurally generated stats, and a soul description generated by Claude on first hatch. ### Key types | Type | Description | | --------- | ----------------------------------------------------------------------------------------- | | `Buddy` | Main companion struct — species, name, rarity, is\_shiny, stats, soul description, sprite | | `Species` | 18 species enum with associated rarity tier | | `Stats` | Five stats 0–100: `DEBUGGING`, `PATIENCE`, `CHAOS`, `WISDOM`, `SNARK` | ### PRNG Species and stats are determined by a **Mulberry32 PRNG** seeded from your `userId` hash with the salt `'friend-2026-401'`. The same user always gets the same buddy. ### Sprites ASCII art sprites are 5 lines × 12 characters, with multiple animation frames for idle and reaction states. ### Key dependencies `cc-core`, `cc-api` (for soul generation) **Package:** `cc-plugins`\ **Path:** `crates/plugins`\ **Type:** Library Plugin loader with a trust model and skill macros. Enables third-party extensions to register additional tools and commands. ### Key capabilities * Plugin loader and lifecycle management * Trust model for plugin verification * Skill macros for defining plugin-provided skills ### Key dependencies `cc-core`, `cc-tools` **Package:** `claude-code`\ **Path:** `crates/cli`\ **Type:** Binary (`[[bin]] name = "claude"`) Binary entry point. Produces the `claude` executable. Wires all crates together and starts either the interactive TUI REPL or headless (non-interactive) mode. ### CLI flags | Flag | Type | Description | | -------------------------------- | ----------------------------- | ----------------------------------------------------------- | | `prompt` | `Option` (positional) | Non-interactive prompt | | `-p, --print` | `bool` | Print mode (alias for non-interactive) | | `-m, --model` | `Option` | Override model | | `--permission-mode` | `Option` | `Default` \| `AcceptEdits` \| `BypassPermissions` \| `Plan` | | `--resume` | `Option` | Resume session by ID | | `--max-turns` | `u32` (default: `10`) | Max conversation turns | | `-s, --system-prompt` | `Option` | Override system prompt | | `--append-system-prompt` | `Option` | Append to system prompt | | `--no-claude-md` | `bool` | Skip CLAUDE.md loading | | `--output-format` | `Option` | `Text` \| `Json` \| `StreamJson` | | `-v, --verbose` | `bool` | Enable verbose logging (DEBUG level) | | `--api-key` | `Option` | API key override | | `--max-tokens` | `Option` | Override max tokens | | `--cwd` | `Option` | Working directory | | `--dangerously-skip-permissions` | `bool` | Enable `BypassPermissions` mode | | `--dump-system-prompt` | `bool` | Print compiled system prompt and exit | | `--mcp-config` | `Option` | MCP server config JSON file | | `--no-auto-compact` | `bool` | Disable auto-compact | ### Startup sequence 1. Parse CLI args with `clap` 2. Initialize `tracing_subscriber` (verbose → DEBUG, default → WARN) 3. Load `Settings` from `~/.claude/settings.json` 4. Build `Config` by layering settings → CLI overrides 5. Create `Arc` 6. Build system context (embedded `system_prompt.txt` + `ContextBuilder`) 7. Create `AnthropicClient` and `ToolContext` 8. Connect MCP servers if `--mcp-config` provided 9. Build tool list: `cc_tools::all_tools()` + `AgentTool` + `McpToolWrapper` for each MCP tool 10. Start cron scheduler via `start_cron_scheduler()` 11. Dispatch to `run_headless()` (prompt provided) or `run_interactive()` (TUI REPL) ### Key dependencies `clap`, `tokio`, `tracing-subscriber`, `cc-core`, `cc-api`, `cc-tools`, `cc-query`, `cc-tui`, `cc-commands`, `cc-mcp`, `cc-bridge` *** ## Workspace dependencies Key shared dependencies declared in `[workspace.dependencies]`: | Crate | Version | Notes | | -------------------------------- | ----------------- | ------------------------------------------------------------- | | `tokio` | 1.44 | `full` features — async runtime for all crates | | `reqwest` | 0.12 | `json`, `stream`, `native-tls`, `multipart` | | `reqwest-eventsource` | 0.6 | SSE streaming in `cc-api` | | `ratatui` | 0.29 | Terminal UI in `cc-tui` | | `crossterm` | 0.28 | `event-stream` — terminal input in `cc-tui` | | `clap` | 4 | `derive`, `env`, `string` — CLI argument parsing | | `serde` / `serde_json` | 1 | Serialization throughout | | `anyhow` / `thiserror` | 1 / 2 | Error handling — libraries use `thiserror`, CLI uses `anyhow` | | `tracing` / `tracing-subscriber` | 0.1 / 0.3 | Structured logging with `env-filter` | | `uuid` | 1 | `v4` — session and task IDs | | `chrono` | 0.4 | `serde` — timestamps | | `schemars` | 0.8 | `derive` — JSON schema generation for tool inputs | | `dashmap` | 6 | Concurrent hash maps for global singletons | | `parking_lot` | 0.12 | Efficient `RwLock` and `Mutex` | | `tokio-util` | 0.7 | `codec`, `rt` — cancellation tokens | | `nix` | 0.29 | `process`, `signal`, `user` — Unix process management | | `syntect` | 5 | Syntax highlighting in `cc-tui` | | `base64` / `sha2` / `hex` | 0.22 / 0.10 / 0.4 | Crypto utilities in `cc-bridge` | | `walkdir` | 2 | Directory traversal in `cc-tools` | | `similar` | 2 | Diff computation | | `once_cell` | 1 | `Lazy` singletons |