modscode / Gallery / cache-meter
cache-meter
Barra sopra il prompt che si svuota col tempo: quanto resta dell'ora di prompt cache dall'ultima richiesta, con contesto, costo del turno, cache letta, stato della repo e bottoni Commit, Push e Nuova chat
What it does
- Draws a band above the prompt, toasts
- Adds /cache, /push, /nuova
- Hooks session.measure, session.start, turn.complete, turn.step
- Keeps its own state between turns
- Starts processes
Good points
- No network calls
- Handles errors
- Writes no files
Code to start from
Two kinds: a starter modscode writes from the design above, and the lines of the mod's own code that draw it.
Starter (register.tsx)
import type { Register } from 'claude-code'
// Drawn like cache-meter by Andrea Brugnoli (band, toast), as modscode read it from the mod's code:
// https://modscode.com/gallery/andreabrugnoli-cache-meter/
// Written by modscode from that reading, not copied from the mod: use it as you like.
// Each value below stands for one the mod works out at run time; put in your own.
export const register: Register = on => {
// the band above the prompt; what else goes there is drawn under it
on('ui.render', { component: 'AbovePrompt' }, async ($, e, next) => {
const { Box } = $.ui.resolve(e)
return (
<Box flexDirection="column">
{await next(e)}
</Box>
)
})
on('session.start', async ($, e, next) => {
const branch = '…'
await $.ui.toast(`Push fatto su ${branch}`)
await $.ui.toast(`Push non riuscito: git non risponde`)
return next(e)
})
}
The mod's own code
Shown under the mod's licence (MIT); its text is below. Keep the notice if you copy these lines.
cache-meter/hooks/register.js lines 299–421 · Band
on('ui.render', { component: 'AbovePrompt' }, async ($, e, next) => {
// Quello che disegnano le altre mod nella banda resta sotto la nostra riga
const theirs = await next(e)
// L'ora si rilegge a ogni disegno: non dipende dal timer, che può fermarsi
try {
now = await $.clock.now()
} catch {}
const { Box, Text, Button } = $.ui.resolve(e)
const dim = (text) => Text({ dimColor: true, children: [text] })
// Con lo stato di git i bottoni compaiono solo se c'è qualcosa da fare
const hasChanges = git === null || git.changed > 0
const canPush = git !== null && git.changed === 0 && (git.ahead > 0 || !git.hasUpstream)
const gap = Text({ children: [' '] })
const buttons = Box({
flexDirection: 'row',
children: [
hasChanges && Button({ key: 'commit', label: 'Commit e push', hotkey: 'g', onPress: () => $.prompt.submit({ text: COMMIT_PROMPT }) }),
hasChanges && gap,
canPush && Button({ key: 'push', label: 'Push', hotkey: 'p', onPress: () => pushNow($) }),
canPush && gap,
Button({
key: 'fresh',
label: 'Nuova chat',
hotkey: 'n',
onPress: () => startHandoff($),
}),
].filter(Boolean),
})
const gitLine =
git === null
? null
: Box({
flexDirection: 'row',
children: [
dim('repo · ' + git.branch + ' · '),
Text(git.changed > 0 ? { color: 'yellow', children: [git.changed + ' modificati'] } : { dimColor: true, children: ['0 modificati'] }),
dim(' · '),
Text(git.ahead > 0 ? { color: 'yellow', children: [git.ahead + ' da pushare'] } : { dimColor: true, children: ['0 da pushare'] }),
],
})
// Niente props indefinite: il colore è scelto prima
const paint = (text, color) => Text(color ? { color, children: [text] } : { dimColor: true, children: [text] })
const columns = e.props.bodyColumns
const wide = columns >= 110
const barWidth = wide ? 12 : 6
// Una barra piena per la parte "buona": nel contesto è lo spazio usato, nella cache il tempo che resta
const bar = (fraction, color) => {
const full = Math.min(barWidth, Math.max(0, Math.ceil(fraction * barWidth)))
return [paint('█'.repeat(full), color), dim('░'.repeat(barWidth - full))]
}
// La cache: una barra che si svuota e i minuti che restano
let isCold = false
let cacheSeg
if (lastAt === null) {
cacheSeg = dim('cache · in attesa della prima richiesta')
} else {
const leftMs = Math.max(0, ttlMs - (now - lastAt))
if (leftMs === 0) {
isCold = true
cacheSeg = Box({ flexDirection: 'row', children: [dim('cache ' + '░'.repeat(barWidth) + ' '), paint('scaduta', 'red')] })
} else {
const minutes = Math.ceil(leftMs / 60000)
const color = leftColor(minutes)
cacheSeg = Box({ flexDirection: 'row', children: [dim('cache '), ...bar(leftMs / ttlMs, color), dim(' '), paint(minutes + ' min', color)] })
}
}
// Gli altri consumi, ognuno al suo posto solo se il motore ha riportato la cifra
const others = []
if (usage) {
const c = contextColor(usage.percent)
others.push(
Box({
flexDirection: 'row',
children: [
dim('contesto '),
...bar(usage.percent / 100, c),
dim(' '),
paint(usage.percent + '%', c),
dim(' ' + short(usage.tokens) + '/' + short(usage.window)),
usage.percent > CONTEXT_BAD && paint(' · Nuova chat?', 'red'),
].filter(Boolean),
}),
)
}
const secondary = []
if (lastTurn) {
const hot = lastTurn.usd !== null && lastTurn.usd >= COST_WARN
secondary.push(
Box({
flexDirection: 'row',
children: [
dim('turno '),
lastTurn.usd !== null && paint(dollars(lastTurn.usd), hot ? 'yellow' : null),
lastTurn.usd !== null && dim(' · '),
dim(short(lastTurn.fresh) + ' nuovi · ' + short(lastTurn.out) + ' generati'),
].filter(Boolean),
}),
)
}
if (startedAt !== null) secondary.push(dim('sessione ' + duration(Math.max(0, now - startedAt))))
if (cacheReadPct !== null) {
secondary.push(Box({ flexDirection: 'row', children: [dim('cache letta '), paint(cacheReadPct + '%', cacheColor(cacheReadPct))] }))
}
const joined = (list) => list.flatMap((p, i) => (i ? [dim(' · '), p] : [p]))
// Tutto in una riga che va a capo da sola solo se manca lo spazio: le colonne di una finestra desktop non dicono quanto è larga
const main = Box({ flexDirection: 'row', flexWrap: 'wrap', children: joined([cacheSeg, ...others, ...secondary]) })
const extra = null
// Cache scaduta con un contesto grande: il prossimo prompt riscrive tutto a prezzo pieno
const coldWarn =
isCold && usage && usage.tokens >= 20000
? Box({ flexDirection: 'row', children: [paint('Cache scaduta · il prossimo prompt riscrive ' + short(usage.tokens) + ' token', 'red'), dim(' · se cambi argomento conviene Nuova chat')] })
: null
return Box({
flexDirection: 'column',
children: (e.props.isWorking ? [main, extra, theirs] : [main, extra, coldWarn, gitLine, buttons, theirs]).filter(Boolean),
})
})Licence text (MIT)
MIT License Copyright (c) 2026 Dario Fontanel Copyright (c) 2026 Andrea Brugnoli Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
What its code calls
runs programsdrives Clauderemembers
The design, read from code
Drawn from the mod's source at the commit read, not from a run: a list is drawn three times, a condition takes its first branch that draws in the desktop app, and a value only the run time knows is shown as a made-up sample (dotted underline) or left out. Colours and type are this site's.
What its code shows
Read from the source at commit 374b38cb0669 on 2026-10-06. The first group decides whether a mod is listed; the rest is for you to weigh. A later commit is not read until the next crawl.
| Decides the listing: code you can check | |
|---|---|
| Entry read | Every module hooks/hooks.json names was read.cache-meter/hooks/register.js |
| Parses | Every file parses as TypeScript or JavaScript.1 files parsed |
| All its code is in the mod | Every import is a file of the mod or the engine's own module; no packages, no require.all its code is in the mod |
| Readable | No minified lines, no eval or new Function, no import of a computed path, no encoded blobs.no minified code, no eval, no encoded blobs |
| Calls in the open | Network and programs are reached as $.http.fetch and $.process.run in place, never passed around.every call outside goes through $ in the open |
| For you to weigh before installing | |
| Where it draws | The terminal, the desktop app, both, or nothing (hooks only: a guard or a prompt rewriter), as its code says. Shown, never a reason to leave a mod out.draws in the terminal and the desktop app, the same in both |
| Install line | Whether its repository's own .claude-plugin/marketplace.json lists it, so it installs from that marketplace with the lines on its page.listed in its repository's .claude-plugin/marketplace.json: installs from there |
| Programs on Windows | Whether every program it starts through $.process exists on Windows (tail, date, open, osascript, /usr/… do not).runs no program a Windows PC lacks |
| Network | Whether every fetch names its https host in the code.no network |
| Programs | Whether every program it starts is named in the code and is not a shell, an interpreter or a network tool.cache-meter/hooks/register.js:132 a program named at run time |
| Reads and sends | Whether it both reads files or environment variables and reaches the network.reaches the network, but reads no files and no environment variables |
| Keys in the source | Whether the source holds what looks like an API key or a private key.no keys in the source |
| Licence | An open licence (MIT, Apache-2.0, BSD, ISC, Unlicense, 0BSD, CC0) with its text lets modscode show its code; otherwise the code is linked.MIT |
This is a reading of the code text, not a security review: it does not run the mod, and it cannot see what a program the mod starts does. The check before installing is yours. How mods are chosen
Install it
Check it yourself before you install it. Mods run unsandboxed, with your permissions, and modscode does not vouch for what this code does. Read the code below (or run claude plugin validate . in its folder), weigh what it reaches, and install the commit you read.
Its repository is its marketplace. Add that marketplace (in the terminal with these commands, or in the desktop app's plugin settings) and install the mod from it:
/plugin marketplace add andreabrugnoli/mods/plugin install cache-meter@andrea-modsThis installs the marketplace's latest commit, which may not be the one read here (374b38cb0669). Compare them before you install.
Ask Claude about it
With the modscode connector added, Claude can read this design, what its code reaches and its code, and build on them. Ask it like this:
Read the modscode design "andreabrugnoli-cache-meter" with its code and make me a pane like itSearch them from Claude: the MCP connector
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