Go Limits

An OpenCode TUI plugin that shows your opencode Go subscription usage limits in the sidebar — session, weekly, and monthly windows as bars with percentage and reset countdown.

Usage
Session  ██████████ 100% 2h 3m
Weekly   ████░░░░░░ 40%  4d 5h
Monthly  ██░░░░░░░░ 20%  15d 3h

• Session — the 5-hour rolling window (Xh Xm until reset)
• Weekly — Xd Xh until reset
• Monthly — Xd Xh until reset

Bar color goes green → yellow (70%+) → red (90%+ or rate-limited). Data refreshes every 30 seconds.

Requirements

• OpenCode v1 (≥ 1.3.4) or v2 (≥ 2.0.x). The package declares engines.opencode: "^1.3.4 || ^2.0.0" — v1 hosts before 1.3.4 lack the runtime-module interception the plugin relies on, so they are not supported. The same install works on both versions: the plugin ships a dual-shape entry module that each loader reads its own way.
• An active opencode Go subscription with opencode auth set up (opencode auth login or /connect in the TUI) — the key is read from auth.json under the opencode-go provider, from the first of:
  • $OPENCODE_DATA_DIR
  • $XDG_DATA_HOME/opencode
  • ~/.local/share/opencode

Tested against: @opencode-ai/plugin@1.18.35 (v1) and @opencode/plugin@2.0.24 (v2) types.

Install

opencode v1:

opencode plugin opencode-go-limits -g

opencode v2:

opencode plugin add opencode-go-limits

or add it manually to ~/.config/opencode/tui.json:

{
  "plugin": ["opencode-go-limits"]
}

Restart OpenCode after installing. The widget appears in the sidebar below the built-in blocks (context, MCP, LSP, todos, files).

How it works

The plugin calls the (undocumented) Go usage endpoint:

GET https://opencode.ai/zen/go/v1/usage
Authorization: Bearer <api-key>

which returns the percentage used and reset time for each window:

{
  "usage": {
    "rolling":  { "status": "ok", "percent": 98, "resetsAt": "2026-10-07T22:03:52.000Z" },
    "weekly":   { "status": "ok", "percent": 39, "resetsAt": "2026-10-12T00:00:00.000Z" },
    "monthly":  { "status": "ok", "percent": 19, "resetsAt": "2026-10-22T18:11:46.000Z" }
  }
}

The API key is read from auth.json on every fetch, so rotating your key doesn't require a restart. If the fetch fails, a warning with the HTTP status is logged and the widget keeps its last known data; with no key configured, only the header is shown.

Files

File	Purpose
v1.tsx	OpenCode v1 TUI plugin source: registers the sidebar_content slot and renders the bars
v2.tsx	OpenCode v2 port: same widget via the v2 setup/slot API (nested theme tokens)
entry.ts	Dual-shape entry module (id + tui + setup) — what opencode loads from dist/tui.js
shared.ts	Rendering helpers shared by both implementations (bar, reset countdown)
usage.ts	Fetch + parse of the usage endpoint (no dependencies)
build.mjs	Compiles the sources to dist/ with the Babel solid preset
dist/	Compiled output — what npm ships and opencode loads

License

MIT