ai-statusline

A high-performance, customizable status line for Claude Code CLI.

Built in Rust. Zero runtime dependencies. Sub-millisecond rendering.

[Opus] ▓▓▓▓░░░░░░ 42% | $0.08 | 5m 23s
📁 my-project | 🌿 main +3 ~2 | +156 -23 | v2.1.31

✨ Features:

• 🎨 Interactive TUI configurator — Visual configuration with live preview
• ⚡ 26 customizable widgets — Model, tokens, cost, git status, and more
• 🎭 11 built-in themes — Dracula, Nord, Tokyo Night, Catppuccin, and more
• 🚀 Sub-millisecond rendering — Zero lag, always fresh
• 🔧 Zero dependencies — Single 1MB binary, no Node.js required

Why ai-statusline?

	ai-statusline	ccstatusline
Language	Rust (compiled binary)	TypeScript (bunx/npx)
Render time	<1ms	~200ms (npx overhead)
Binary size	1.0 MB	N/A (requires Node.js)
Runtime deps	None	Node.js or Bun
Data source	Native JSON API (stdin)	Transcript file parsing
Accuracy	Always correct (official API)	Breaks across models/versions
Memory	1.2 MB	~50 MB (Node.js runtime)
Widgets	26	~15
Config format	TOML (with comments)	JSON

Quick Start

Install

# npm (downloads platform binary automatically)
npm install -g ai-statusline

# Or direct binary
curl -fsSL https://raw.githubusercontent.com/mstuart/ai-statusline/main/scripts/install.sh | sh

# Or build from source
cargo install --path .

Configure Claude Code

Add to ~/.claude/settings.json:

{
  "statusLine": {
    "type": "command",
    "command": "ai-statusline"
  }
}

Restart Claude Code. Done.

Configure Your Status Line

🎨 Interactive TUI (Recommended for Beginners)

The easiest way to customize your status line:

ai-statusline config

The TUI configurator lets you:

• Add/remove widgets — Choose from 26 available widgets with live preview
• Reorder widgets — Use j/k to move widgets up/down
• Switch themes — Browse and preview 11 built-in themes instantly
• Configure powerline — Toggle powerline mode, change separators, enable auto-align
• Manage layouts — Add/remove status lines, adjust flex modes
• Save instantly — Ctrl-S to save, changes apply immediately to Claude Code

⚡ Quick Presets

Apply pre-built layouts instantly:

ai-statusline preset full       # Two-line layout with everything
ai-statusline preset minimal    # Just model + context %
ai-statusline preset powerline  # Full layout with powerline arrows
ai-statusline preset compact    # Single line, compact values

Widgets

26 built-in widgets, all reading from Claude Code's native JSON API:

Core Metrics

Widget	Type	Description
Model	model	Current model name (Opus, Sonnet, etc.)
Context %	context-percentage	Context window usage with optional progress bar
Context Length	context-length	Absolute token count (e.g., "42K")
Tokens In	tokens-input	Input tokens from current usage
Tokens Out	tokens-output	Output tokens
Tokens Cached	tokens-cached	Cache creation + read tokens
Tokens Total	tokens-total	All tokens combined
Session Cost	session-cost	Running cost in USD with optional burn rate
Session Duration	session-duration	Elapsed time with optional API ratio
Block Timer	block-timer	5-hour usage block tracker with progress bar

Git Integration

Widget	Type	Description
Branch	git-branch	Current branch (with detached HEAD support)
Status	git-status	Staged/modified/untracked file counts
Worktree	git-worktree	Active worktree name (hidden when not in worktree)

Workspace

Widget	Type	Description
CWD	cwd	Current directory (basename, full, fish-style)
Lines Changed	lines-changed	Lines added/removed this session
Version	version	Claude Code version
Session ID	session-id	Truncated session identifier

Advanced

Widget	Type	Description
Vim Mode	vim-mode	NORMAL/INSERT (hidden when vim mode off)
Agent Name	agent-name	Active agent (hidden when not using --agent)
Output Style	output-style	Current output style (hidden when "default")
Exceeds 200K	exceeds-tokens	Warning when tokens exceed 200K threshold
API Duration	api-duration	Ratio of API wait time to total time
Custom Command	custom-command	Run any shell command, display output
Custom Text	custom-text	Static text with emoji support
Separator	separator	Visual divider between widgets
Flex Separator	flex-separator	Flexible spacer that pushes widgets apart
Terminal Width	terminal-width	Current terminal width in columns

Configuration

TUI Configurator

Launch the interactive TUI to configure your status line visually:

ai-statusline config

Navigation:

• Tab / Shift-Tab — Switch between tabs (Widgets, Theme, Powerline, Layout, Preview)
• ↑ / ↓ — Navigate items
• ← / → — Switch between status lines (in Widgets tab)
• Enter / Space — Select/toggle options
• a — Add widget
• d / Delete — Remove widget
• j / k — Move widget down/up
• Ctrl-S — Save configuration
• q — Quit

Tabs:

• Widgets — Add, remove, and reorder widgets on each status line
• Theme — Browse and select from 11 built-in color themes
• Powerline — Toggle powerline mode, cycle separators, enable auto-align
• Layout — Add/remove status lines, change flex mode
• Preview — Live preview of your current configuration

Manual Configuration

Config lives at ~/.config/ai-statusline/config.toml. Generate a default:

ai-statusline init

Or edit the TOML file directly for advanced customization.

Example config

theme = "dracula"
default_separator = " | "
default_padding = " "
flex_mode = "full-minus-40"
compact_threshold = 60
global_bold = false
inherit_separator_colors = false

# First status line
[[lines]]
type = "model"
color = "cyan"
raw_value = true

[[lines]]
type = "context-percentage"
metadata = { bar = "true" }

[[lines]]
type = "session-cost"
color = "yellow"
raw_value = true

[[lines]]
type = "session-duration"
raw_value = true

# Second status line (start a new line group)
[[lines]]
type = "cwd"
metadata = { fish_style = "true" }

[[lines]]
type = "git-branch"
color = "magenta"

[[lines]]
type = "git-status"

[powerline]
enabled = false
separator = "\uE0B0"
auto_align = false

Widget options

Every widget supports:

Option	Type	Description
type	string	Widget type (see table above)
color	string	Foreground color (named, hex, or 256-color index)
background_color	string	Background color
bold	bool	Bold text
raw_value	bool	Compact mode without labels
padding	string	Override default padding
merge_next	bool	Merge with next widget (no separator)
metadata	table	Widget-specific options

Widget-specific metadata

Widget	Key	Values	Description
context-percentage	bar	"true"	Show progress bar
context-percentage	inverse	"true"	Show remaining instead of used
session-cost	burn_rate	"true"	Show hourly burn rate
session-duration	api_ratio	"true"	Show API time percentage
block-timer	bar	"true"	Show progress bar
block-timer	bar_width	"16"	Progress bar width
cwd	full	"true"	Show full path
cwd	fish_style	"true"	Fish-style abbreviation
cwd	segments	"3"	Show last N segments
custom-command	command	shell cmd	Command to execute
custom-text	text	any string	Static text to display
separator	char	any char	Separator character
flex-separator	char	any char	Fill character (default: space)

Themes

11 built-in themes optimized for popular terminal color schemes:

ai-statusline theme list    # List all themes
ai-statusline theme set nord  # Switch theme

Available: default, solarized, nord, dracula, gruvbox, monokai, light, high-contrast, one-dark, tokyo-night, catppuccin

Color Support

ai-statusline auto-detects terminal color capabilities:

• Truecolor (24-bit): detected via COLORTERM=truecolor
• 256-color: detected via TERM=*256color*
• 16-color: fallback for basic terminals
• No color: respects NO_COLOR environment variable

Override with --color-level:

ai-statusline --color-level truecolor
ai-statusline --color-level none

CLI Commands

ai-statusline              # Render status line (reads JSON from stdin)
ai-statusline init         # Generate default config file
ai-statusline doctor       # Check environment compatibility
ai-statusline theme list   # List available themes
ai-statusline theme set <name>  # Switch theme
ai-statusline preset <name>     # Apply a preset layout
ai-statusline config            # Interactive TUI configurator
ai-statusline dump-schema       # Print expected JSON input schema
ai-statusline --version         # Show version

Performance

Benchmarked on Apple M1:

Metric	Value
Render time	<1ms
Binary size	1.0 MB
Memory usage	1.2 MB
Startup time	<1ms

Claude Code debounces status line updates at 300ms. ai-statusline completes in <1ms, ensuring the status line is always fresh and never causes UI lag.

How It Works

Claude Code pipes JSON session data to your status line script via stdin. ai-statusline reads this JSON, applies your configuration, and prints formatted ANSI text to stdout. No transcript parsing, no file watching, no external dependencies.

Claude Code → JSON stdin → ai-statusline → ANSI stdout → Terminal

Building from Source

git clone https://github.com/mstuart/ai-statusline
cd ai-statusline
cargo build --release
# Binary at ./target/release/ai-statusline

License

MIT