Opus 4.8 ▓▓░░░░░░░░ 22%Context Burn Bar
by
@gwienerA minimal 5-slot block bar showing context-window usage with a green/yellow/red status dot. Source: github.com/gwiener/claude-burn-bars
Before you install
- This version was reviewed before it was listed on Jun 29, 2026
- Doesn't ask to connect to the internet
- Needs jq.
- The 5h label is fixed text. The bar measures context window use, not the 5-hour rate limit.
Preview
Clean repo
5h ▓░░░░ 🟢
New session
5h ░░░░░ 🟢
Dirty branch
5h ▓▓░░░ 🟢
Near-full
5h ▓▓▓▓▓ 🔴
1M context
5h ▓▓▓░░ 🟡
Post-compact
5h ░░░░░ 🟢
Worktree
5h ▓▓░░░ 🟢
Non-git
5h ▓░░░░ 🟢
What it does
A five-slot bar for how full the context window is, followed by a green, yellow or red dot.
- Written in
- Bash
- Network access
- None requested
- Works in
- Terminal
How it works
- Reads context_window.used_percentage with jq and treats a missing value as 0.
- Each slot is 20%, rounded to the nearest slot, so 48% fills two and 64% fills three.
- The dot is green under 50%, yellow from 50% and red from 90%.
Source
#!/bin/bash
# Claude Code context-window status bar.
# Reads the Claude Code status line JSON from STDIN and renders
# a compact 5-slot bar for the context window (5h) usage.
set -euo pipefail
input=$(cat)
PCT=$(echo "$input" | jq -r '.context_window.used_percentage // 0' | cut -d. -f1)
# Build a 5-slot progress bar: each slot = 20%.
filled=$(( (PCT + 10) / 20 ))
[ "$filled" -gt 5 ] && filled=5
bar=""
for i in 1 2 3 4 5; do
if [ "$i" -le "$filled" ]; then
bar="${bar}▓"
else
bar="${bar}░"
fi
done
# Icon: green <50%, yellow 50-90%, red 90%+
if [ "$PCT" -ge 90 ]; then
icon="🔴"
elif [ "$PCT" -ge 50 ]; then
icon="🟡"
else
icon="🟢"
fi
printf "5h %s %s\n" "$bar" "$icon"
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More status lines
Opus 4.8 high ✦ │ ctx 22% │ app (main) │ PR #1287 ● │ $0.41 · 10m +128 -34
Session ● ● ● ● ● ● ● ● ○ ○ ○ 74% left Resets in 2h 6m
Weekly ● ● ● ● ● ● ● ● ● ● ○ 93% left Resets in 2d 0h
Opus 4.8 │ main │ app │ ▓▓░░░░░░░░ 44k/200k │ $0.41
app · main · Opus-4.8 · effort high · ctx 22% · 5h 26% ↻2h6m · 7d 7% ↻2d0hOpus 4.8 · app on main[Opus 4.8] | ━━━━━━ 22% (44K/200K) | app | git:(main) | ⏱ 10m
Related mods
The session's context window fill, right above the prompt: gray while there is room, yellow when it is time to /compact, red when a new session is better.
· ↑ 37.0k ↓ 1.4k cache 7.0k · session ↑ 111.0k ↓ 4.2kEach turn's tokens and the session's running total, in color at the end of the hint line under the prompt.
Your context window as a stacked bar above the prompt, a color per category, with token counts and the compaction point. /context-bar shows or hides it.
⎿ cache-tax: keepwarm on for 6h00m, a ping 50m after each idle stretch keeps the cache read, not
re-written
⎿ cache-tax: claude-opus-5-5
state warm, 1h00m left
context 44,000 tokens
cold cost $0.35 to re-write it (warm turn $0.01)
keepwarm on, 6h00m left · ping in 50m
break-even up to 40 pings at the read rate cost one cold write, about 33h20m of idle at one
ping per 50m
guard ask first (/cache-tax guard warn to only show the price)
session 0 cold writes paid, $0.00
[>] cache-tax · warm · keepwarm 6h00m left · ping in 50m [-]A Claude Code mod that keeps the one-hour prompt cache warm during breaks and asks before a cold send, showing its estimated rewrite cost. Warming uses model requests and costs tokens. Requires Claude Code 2.1.287+.