pi-usage-bar

npm · source

An AI subscription usage gauge for the pi coding agent.

Shows how much of your coding-plan quota you've used and how long until it resets, in a status line at the bottom of the footer. Supports Claude Pro/Max, ChatGPT Plus/Pro (Codex), GitHub Copilot, the GLM coding plan (z.ai), and the Kimi coding plan — each optional, each with per-window toggles. It also watches vendors' public status pages and prepends a color-coded ! marker when there's an active incident — so you know it's them, not you.

 ▓▓▓▓░░ 65% · 0h 11m

With multiple windows/providers enabled:

 cld ▓▓▓▓░ 65% · 0h 11m  7d ▓░░░░ 19% · 1d 11h │ oai ▓░░░░ 12% · 3h 4m

During a vendor incident:

 ! cld ▓▓▓▓░ 65% · 0h 11m

• Bar color escalates with usage: green < 50%, amber 50–85%, red > 85%.
• The countdown ticks live; usage refreshes every 2 minutes (with backoff on failures — these endpoints throttle aggressive polling).
• Last known values are cached, so the bar appears instantly on restart.
• Providers hide silently when credentials are missing/expired or a fetch fails; the whole row hides when nothing is available.
• Provider prefixes (cld/oai/cop/glm/kmi) appear only when two or more providers are visible; window labels (5h/7d/mo/…) appear only when a provider shows two or more windows.
• The ! status marker is red for critical/major incidents, amber for minor, accent for maintenance.

Install

pi install npm:@satas/pi-usage-bar

Or add it manually to ~/.pi/agent/settings.json:

{
  "packages": ["npm:@satas/pi-usage-bar"]
}

To try it without installing:

git clone https://github.com/satas20/pi-usage-bar.git
pi -e ./pi-usage-bar/extensions/usage-bar.ts

Configuration

On first run the extension creates ~/.pi/agent/usage-bar.json with defaults (Claude enabled, 5-hour window only). Edit it and restart pi; the config is read once per session.

{
  "ui": {
    "show_bars": true,     // render ▓▓░░ mini-bars (false = text only)
    "show_status": true    // vendor status-page incident marker (!)
    // "bar_width": 6      // override bar width (default: 6 for a single window, 5 otherwise)
  },
  "anthropic": {
    "enabled": true,       // Claude Pro/Max via ~/.claude/.credentials.json
    "show_5h": true,       // rolling 5-hour session window
    "show_7d": false,      // weekly cap across all models
    "show_model": false    // per-model weekly windows (e.g. Fable)
    // "credentials_path": "~/.claude/.credentials.json"
  },
  "openai": {
    "enabled": false,      // ChatGPT Plus/Pro via the Codex CLI login
    "show_5h": true,
    "show_7d": false
    // "codex_auth_path": "~/.codex/auth.json"
  },
  "github-copilot": {
    "enabled": false,      // Copilot premium requests via pi's /login
    "show_mo": true        // monthly premium-requests quota (its only window)
  },
  "zai": {
    "enabled": false,      // GLM coding plan (z.ai)
    "show_5h": true,
    "show_7d": false,
    "show_mo": false,      // monthly tools quota (search/reader/zread)
    "api_key_env": "ZAI_API_KEY"
    // "api_key": "..."    // inline key — chmod 600 this file!
  },
  "kimi": {
    "enabled": false,      // Kimi coding plan
    "show_5h": true,
    "show_7d": false,
    "api_key_env": "KIMI_API_KEY"
    // "api_key": "..."
  }
}

Providers & data sources

Provider	Credentials (first match wins)	Usage endpoint	Status endpoint	Windows
anthropic	Claude Code's ~/.claude/.credentials.json → pi's auth store	api.anthropic.com/api/oauth/usage (what Claude Code's /usage uses)	status.anthropic.com	5h session, 7d all-models, 7d per-model
openai	Codex CLI's ~/.codex/auth.json → pi's auth store	chatgpt.com/backend-api/wham/usage	status.openai.com	5h session, 7d weekly
github-copilot	pi's auth store → opencode's auth store (GitHub OAuth token)	api.github.com/copilot_internal/user	githubstatus.com	monthly premium requests (hidden on unlimited plans)
zai	$ZAI_API_KEY → inline api_key → pi's/opencode's auth store (zai-coding-plan/zai)	api.z.ai/api/monitor/usage/quota/limit	—	5h session, 7d weekly, monthly tools
kimi	$KIMI_API_KEY → inline api_key → pi's/opencode's auth store (kimi-for-coding/…)	api.kimi.com/coding/v1/usages	—	plan-dependent (5h/7d/monthly)

If you log in through pi itself (/login), everything works with zero extra setup — the extension falls back to pi's own auth store (~/.pi/agent/auth.json), then to opencode's (~/.local/share/opencode/auth.json) if you use both tools. All credential access is read-only; expired tokens simply hide the provider until the owning CLI refreshes them.

Security note: each credential is read from disk/env and sent only to its own provider's API host, over HTTPS, to fetch usage numbers. Status pages are public Statuspage JSON endpoints fetched without any credentials. Nothing else is read, stored, or transmitted. The usage endpoints are undocumented/internal (the same ones the vendors' own tooling uses) and may change without notice.

Develop

npm install         # dev deps (typescript, pi types)
npm run typecheck   # tsc --noEmit
pi -e ./extensions/usage-bar.ts   # run pi with your working copy

No build step — pi loads TypeScript extensions directly.

Sibling project

Using opencode too? The same gauge exists as @satas/opencode-usage-bar.

Roadmap

• Anthropic/OpenAI OAuth token auto-refresh (both credential files include a refresh token; for now the respective CLIs keep them fresh).

Requirements

• pi coding agent (tested with >= 0.80)
• Node 20+ (pi's own requirement)

Contributing

Contributions welcome — especially new providers (see the checklist in CONTRIBUTING.md). The whole extension is a single file with zero runtime dependencies.

License

MIT