pi-usage

Pi extension that fetches subscription usage for all supported providers (Anthropic, Copilot, Gemini, Antigravity, Codex, Kiro, z.ai, xAI/Grok).

Simplified fork of the excellent @marckrenn/pi-sub-core. Keeps all providers, applies two bug fixes, drops features we don't need.

Bug fixes

Bedrock false positive detection

pi-sub-core's detectProviderFromModel falls back to matching model tokens (e.g. "claude") when provider tokens don't match. This causes AWS Bedrock models (which run Claude but are billed separately) to be misidentified as Anthropic subscription usage. pi-usage only falls back to model tokens when no explicit provider is set.

Aggressive refresh causing 429 flicker

pi-sub-core uses force: true on turn_end and tool_result, bypassing the cache TTL and hammering the usage APIs. Under load (multiple pi instances), this triggers 429s that cause the usage display to flicker. pi-usage always respects the cache TTL. See marckrenn/pi-sub#58.

Simplifications vs pi-sub-core

• No status page fetching
• No settings UI or settings persistence
• No tool registration
• No update-all event (only update-current)
• No provider cycle command
• Self-contained types — no dependency on @marckrenn/pi-sub-shared

Events

Event	Payload	Description
usage-core:ready	{ state: UsageCoreState }	Emitted once on session start
usage-core:update-current	{ state: UsageCoreState }	Emitted on usage changes

UsageCoreState has an optional provider name and optional usage snapshot with rate windows. When provider is undefined, no known subscription provider was detected for the current model.

Install

pi install npm:@juanibiapina/pi-usage