feat(opencode): show quota usage toast after quota refresh

[iceteaSA]

Dependency: Requires #34 (QuotaManager) to be merged first. Branch is based on feat/quota-manager.

Displays quota usage bar notifications via client.tui.showToast after quota data is refreshed.

• Shows main and fallback account usage with visual bars (█░)
• Percentage and reset time per account
• Toast variant reflects severity: info (<70%), warning (≥70%), error (≥90%)
• Clamped bar rendering prevents RangeError on >100% utilization

Single file change: packages/opencode/src/index.ts (+127 lines)

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Summary by cubic

Adds a quota usage toast and a shared QuotaManager in @cortexkit/anthropic-auth-core to unify main/fallback quota caching, serialize and back off usage API calls, persist quota/backoff state, and reduce 429s across the OpenCode plugin and routing.

• New Features

  • Show quota toast via client.tui.showToast with bars, % and reset time; highlights the active account; variants info/warning/error; clamps >100%.
  • Add QuotaManager: unified main/fallback cache with inflight dedup, 1s serial API gate + cross‑process file lock, exponential backoff (60s–15m) for 429/5xx/network errors, seeding from disk, and request‑count trigger (refreshEveryNRequests).
  • Persist main quota and backoff via plugin callbacks so cache survives restarts and seeds the shared cache at boot.
  • Fail‑closed path: when failClosedOnUnknownQuota is set, no cached main quota, and the quota API is backed off, return 429 with Retry-After.

• Refactors

  • Integrate QuotaManager with FallbackAccountManager and OpenCode routing/loader: shared staleness checks, background refresh, and overlay cached fallback quotas for display.
  • Extend AccountStorage.quota with refreshEveryNRequests, mainQuota, mainQuotaCheckedAt, and mainLastQuotaApiError; add backoff helpers and messages; add QuotaManager test suite and update plugin tests.

^{Written for commit b20b6c0. Summary will update on new commits. Review in cubic}

[cubic-dev-ai]

3 issues found across 6 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="packages/opencode/src/index.ts">

<violation number="1" location="packages/opencode/src/index.ts:428">
P2: Fallback quota command output drops fresh per-account refresh errors by always passing an empty error map.</violation>
</file>

<file name="packages/core/src/quota-manager.ts">

<violation number="1" location="packages/core/src/quota-manager.ts:88">
P2: Persisted main quota cache uses interval-only staleness instead of policy-aware `getQuotaNextRefreshAt`, causing premature refreshes.</violation>
</file>

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