ccline

A fast status line for Claude Code.

This is a personal tool. It's published as a starting point for forking and customizing, not as a general-purpose library. The layout is hardcoded to my preferences — fork it and make it yours.

Why speed matters

Claude Code's status line command runs on every prompt refresh (300ms debounce). A typical shell script spawns multiple processes per invocation (bash, jq, git), adding up to ~170ms. This Rust binary uses native libraries (libgit2, serde) to do the same work in ~13ms — about 10x faster.

It's also kinder to your battery. Over a full day of heavy coding, those saved milliseconds add up to less CPU time and less heat. Napkin math puts the annual energy savings at a few cents at Hydro-Québec rates. The API call that just answered your prompt probably used more electricity, but at least your fan stays quiet.

Fork and customize

The layout is hardcoded in src/main.rs (~80 lines). There's no config file by design — editing source and running cargo build --release is faster than parsing config on every invocation.

Claude Code sends a rich JSON payload on stdin with every refresh. This project currently uses only a subset:

Used	Available but unused
workspace.current_dir	model.id
model.display_name	cost.total_lines_added/removed
cost.total_cost_usd	vim.mode, session_id, worktree.*
context_window.total_input_tokens
context_window.total_output_tokens
context_window.context_window_size
context_window.used_percentage
(git via libgit2)

Fork this repo and add the fields that matter to you. The serde structs in main.rs are easy to extend.

Install

With mise:

mise use -g github:tinnet/ccline

Or from source:

git clone https://github.com/tinnet/ccline.git
cd ccline
cargo install --path .

Then add to ~/.claude/settings.json:

{
  "statusLine": {
    "type": "command",
    "command": "ccline"
  }
}

Current layout

Segment	Color (Monokai Pro ~60%)	Source
Model	muted green #7a9e56	model.display_name
Path	muted cyan #5a9ea0	Last 2 of workspace.current_dir
Git	muted purple #7a6db0	git2 branch + dirty
Context	muted yellow #b09a42	used_percentage/context_window_size
Tokens+Cost	light gray	context_window total + cost.total_cost_usd
Separators	dark gray	\x1b[90m

Benchmarking

mise run bench

Compares the Rust binary against a POSIX shell equivalent and other status line tools using hyperfine.

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
ccline	13.9 ± 1.3	12.3	17.6	1.00
ccline.sh (via bash)	111.2 ± 2.0	108.7	119.9	7.97 ± 0.74
ccline.sh (via zsh)	117.9 ± 2.1	114.1	123.8	8.46 ± 0.79
ccline.sh (via sh)	117.9 ± 1.7	115.1	120.7	8.46 ± 0.78
starship-claude (defaults)	216.7 ± 2.5	213.6	220.9	15.54 ± 1.43
ccstatusline (defaults)	293.8 ± 4.0	286.2	299.0	21.07 ± 1.95
claude-powerline (defaults)	356.0 ± 23.4	331.6	387.8	25.53 ± 2.87

Optimizations:

• ccline.sh: single jq call (inspired by starship-claude) — 169ms → 111ms (-34%)

See also

• Owloops/claude-powerline — a feature-rich, configurable status line plugin
• sirmalloc/ccstatusline — a Node.js status line with built-in themes
• martinemde/starship-claude — bridges Claude Code data into a Starship prompt

License

MIT

---

Made with ❤️ in Montreal