Know your quota before you hit the wall. A statusline for Claude Code — single Bash file, zero npm.
Most statuslines show "you used 60%." That number means nothing without context. 60% with 30 minutes left? Fine, the window resets soon. 60% with 4 hours left? You're about to hit the wall. claude-lens compares your usage rate to the time remaining and shows the delta. No Node.js, no npm, no lock files. Single Bash file.
- ⇣15% green = you've used 15% less than expected. Headroom. Keep going.
- ⇡15% red = you're burning 15% faster than sustainable. Slow down.
- 15% / 20% = used in the 5h and 7d windows. 3h = resets in 3 hours.
- Top line: model, effort, project
(branch),3f +24 -7= git diff stats
Requires jq.
Plugin (recommended):
Run in your terminal:
claude plugin marketplace add Astro-Han/claude-lens
claude plugin install claude-lensThen inside Claude Code, type /claude-lens:setup.
Manual:
curl -o ~/.claude/statusline.sh \
https://raw.githubusercontent.com/Astro-Han/claude-lens/main/claude-lens.sh
chmod +x ~/.claude/statusline.shAdd to ~/.claude/settings.json:
{
"statusLine": {
"type": "command",
"command": "~/.claude/statusline.sh"
}
}Restart Claude Code. Done.
To remove: delete the statusLine block from ~/.claude/settings.json.
| claude-lens | Node.js/TypeScript statuslines | Rust/Go statuslines | |
|---|---|---|---|
| Runtime | jq |
Node.js 18+ / npm | Compiled binary |
| Codebase | Single file | 1000+ lines + node_modules | Compiled, not inspectable |
| Execution | ~10ms, 3% of refresh cycle | ~90ms, 30% of refresh cycle | ~5ms (est.) |
| Memory | ~2 MB | ~57 MB | ~3 MB (est.) |
| Failure modes | Read-only, worst case prints "Claude" | Runtime dependency, package manager | Generally stable |
| Pace tracking | Usage rate vs time remaining | Trend-only or none | None |
Execution and memory measured on Apple Silicon, 300 runs, same stdin JSON. Rust/Go values are estimates.
Need themes, powerline aesthetics, or TUI config? Try ccstatusline. The entire source of claude-lens is one file. Read it.
Claude Code polls the statusline every ~300ms:
| Data | Source | Cache |
|---|---|---|
| Model, context, cost | stdin JSON (single jq call) |
None needed |
| Quota (5h, 7d, pace) | stdin rate_limits (CC >= 2.1.80) |
None needed (real-time) |
| Quota fallback | Anthropic Usage API (CC < 2.1.80) | /tmp, 300s TTL, async background refresh |
| Git branch + diff | git commands |
/tmp, 5s TTL |
On Claude Code >= 2.1.80, usage data comes directly from stdin. No network calls. On older versions, it falls back to the Usage API in a background subshell so the statusline never blocks.
MIT