openchamber/packages/web/server/lib/quota/DOCUMENTATION.md

Quota Module Documentation

Purpose

This module fetches quota and usage signals for supported providers in the web server runtime.

Entrypoints and structure

• packages/web/server/lib/quota/index.js: public entrypoint imported by packages/web/server/index.js.
• packages/web/server/lib/quota/routes.js: Express route registration for quota endpoints.
• packages/web/server/lib/quota/providers/index.js: provider registry, configured-provider list, and provider dispatcher.
• packages/web/server/lib/quota/providers/google/: Google-specific auth, API, and transform modules.
• packages/web/server/lib/quota/providers/claude/: Claude credential discovery, usage transforms, and rate-limit handling.
• packages/web/server/lib/quota/utils/: shared auth, transform, and formatting helpers.

Supported provider IDs (dispatcher)

These provider IDs are currently dispatchable via fetchQuotaForProvider(providerId) in packages/web/server/lib/quota/providers/index.js.

Provider ID	Display name	Module	Auth aliases/keys
claude	Claude	providers/claude/	Claude Code Keychain entry, Claude Code credentials file, OpenCode auth.json (anthropic, claude), CLAUDE_CODE_OAUTH_TOKEN
codex	Codex	providers/codex.js	openai, codex, chatgpt
command-code	Command Code	providers/command-code.js	command-code OAuth/API credential in OpenCode auth.json, or COMMAND_CODE_API_KEY
cursor	Cursor	providers/cursor.js	Environment/token files, OpenChamber-managed credentials, or explicit one-time Cursor import
crof	CrofAI	providers/crof.js	crof (API key under key or token)
deepseek	DeepSeek	providers/deepseek.js	deepseek (API key under key or token)
exe-dev	exe.dev	providers/exe-dev.js	Usage API token stored under ~/.config/openchamber/quota/
google	Google	providers/google/index.js	google, google.oauth, Antigravity accounts file
hyper	Charm Hyper	providers/hyper.js	hyper (API key under key or token)
github-copilot	GitHub Copilot	providers/copilot.js	github-copilot, copilot
github-copilot-addon	GitHub Copilot Add-on	providers/copilot.js	github-copilot, copilot
kimi-for-coding	Kimi for Coding	providers/kimi.js	kimi-for-coding, kimi
nano-gpt	NanoGPT	providers/nanogpt.js	nano-gpt, nanogpt, nano_gpt
openrouter	OpenRouter	providers/openrouter.js	openrouter
zai-coding-plan	z.ai	providers/zai.js	zai-coding-plan, zai, z.ai
zhipuai-coding-plan	Zhipu AI Coding Plan	providers/zhipuai-coding-plan.js	zhipuai-coding-plan, zhipuai, zhipu
minimax-coding-plan	MiniMax Coding Plan (minimax.io)	providers/minimax-coding-plan.js / providers/minimax-shared.js	minimax-coding-plan
minimax-cn-coding-plan	MiniMax Coding Plan (minimaxi.com)	providers/minimax-cn-coding-plan.js / providers/minimax-shared.js	minimax-cn-coding-plan
ollama-cloud	Ollama Cloud	providers/ollama-cloud.js	Manual cookie pasted into Settings (aid=...; __Secure-session=... from ollama.com), stored under ~/.config/openchamber/quota/
wafer	Wafer.ai	providers/wafer.js	wafer, wafer-ai, wafer_ai, wafer.ai
opencode-go	OpenCode Go	providers/opencode-go.js	opencode-go API key from OpenCode auth.json
neuralwatt	NeuralWatt	providers/neuralwatt.js	neuralwatt (API key under key or token)
xai	xAI	providers/xai.js	xai OAuth entry in OpenCode auth.json

Internal-only provider module

• providers/openai.js exists for logic parity/reuse but is intentionally not registered for dispatcher ID routing.

Response contract

All providers should return results via shared helpers to preserve API shape:

• Required fields: providerId, providerName, ok, configured, usage, fetchedAt
• Optional field: error
• Unsupported provider requests should return ok: false, configured: false, error: Unsupported provider

Provider modules must export providerId, providerName, aliases, isConfigured(auth?), and fetchQuota(). fetchQuota() should return a quota result with usage.windows keyed by window name (for example 5h, 7d, daily) and optional provider-specific usage.models data.

exe.dev, Ollama Cloud, and Cursor credentials are explicitly managed through Settings. exe.dev usage uses a separately generated HTTPS API token restricted to billing credits usage and aggregates every exe-* model provider into one monthly credit window. Generate the token with ssh exe.dev "ssh-key generate-api-key --label=openchamber --exp=30d --cmds='billing credits usage'". OpenCode Go usage uses GET https://opencode.ai/zen/go/v1/usage with the opencode-go API key from OpenCode auth.json as a bearer token and the stable x-opencode-session: openchamber-usage workload id. The server validates managed credentials before atomic 0600 writes and never returns secrets through its API. OpenChamber never scans browser cookie stores or automatically reads Cursor storage; Cursor import is an explicit one-time user action and never modifies Cursor's database.

Command Code usage resolves account scope through GET /alpha/whoami, then reads server-backed credit balances and five-hour/weekly limits from GET /alpha/billing/credits?orgId=.... Personal accounts return org: null and use /alpha/billing/credits without an orgId; organization accounts include their organization id. Web/Electron and VS Code read the standard command-code OpenCode auth entry (including OAuth access) or COMMAND_CODE_API_KEY; credentials remain in the owning runtime and are never returned to shared UI.

On the first OpenCode Go usage refresh after upgrading, OpenChamber deletes the obsolete quota/opencode-go.json credential file without reading its cookie value.

Claude credential and limit semantics

Claude quota reports the subscription limits Claude Code itself is bound by, read from GET https://api.anthropic.com/api/oauth/usage.

• Credential sources, in priority order: the macOS Keychain entry Claude Code-credentials, then ${CLAUDE_CONFIG_DIR:-~/.claude}/.credentials.json (the Linux/WSL location), then the OpenCode auth.json entry, then CLAUDE_CODE_OAUTH_TOKEN. The Keychain wins on macOS because the credentials file there is a leftover Claude Code no longer updates.
• All sources are read-only. OpenChamber never writes to Claude Code's credential store and never refreshes the OAuth token, because Anthropic does not support two live refresh tokens for one client_id — refreshing here would sign the user out of Claude Code. Credentials are read fresh per request so a Claude Code refresh is picked up immediately; an expired token yields an explicit "open Claude Code to sign in again" error rather than a bare 401.
• Limits come from the limits array, keyed by kind: session maps to the 5h window, weekly_all to 7d, and weekly_scoped to a per-model 7d window named by scope.model.display_name. The legacy five_hour/seven_day fields are only a fallback; seven_day_sonnet/seven_day_opus are no longer populated by Anthropic. Unrecognized limit kinds and Anthropic's rotating internal code names (nimbus_quill, tangelo, ...) are ignored rather than guessed at.
• Extra usage is reported as the extra_usage window from spend, only while spend.enabled is true, with a money valueLabel.
• Rate limiting: Anthropic returns 429 aggressively. The last successful usage payload is cached in memory and reserved during a cooldown (Retry-After, else five minutes, capped at one hour). The cache is keyed by a hash of the access and refresh tokens, so switching accounts drops it instead of showing the previous account's numbers.
• Runtime parity: Web/Electron and VS Code preserve the last successful Claude values during the same bounded 429 cooldown. Quota dispatchers also coalesce concurrent refreshes for the same provider in each runtime, while requests for different providers remain parallel.

Add a new provider (quick steps)

1. Choose module shape based on complexity:
   • Simple providers: create packages/web/server/lib/quota/providers/<provider>.js.
   • Complex providers (multi-source auth, multiple API calls, non-trivial transforms): create packages/web/server/lib/quota/providers/<provider>/ with split modules like Google (index.js, auth.js, api.js, transforms.js).
2. Export providerId, providerName, aliases, isConfigured, and fetchQuota.
3. Use shared helpers from packages/web/server/lib/quota/utils/index.js (buildResult, toUsageWindow, auth/conversion helpers) to keep payload shape consistent.
4. Register the provider in packages/web/server/lib/quota/providers/index.js.
5. If needed for direct use, export a named fetcher from packages/web/server/lib/quota/providers/index.js and packages/web/server/lib/quota/index.js.
6. Update this file with the new provider ID, module path, and alias/auth details.
7. Validate with bun run type-check, bun run lint, and bun run build.

MiniMax M3 / Token Plan migration

In 2025/2026 MiniMax rebranded "Coding Plan" to "Token Plan" alongside the M3 model release. The API underwent breaking changes:

• Endpoint fallback: The provider tries /v1/token_plan/remains (M3) first, falling back to legacy /v1/api/openplatform/coding_plan/remains.
• Field semantics: On the token_plan/remains endpoint, current_interval_usage_count returns remaining quota (not consumed). The provider computes used = total - remaining for this endpoint. The legacy coding_plan/remains endpoint retains the old semantics (usage_count = consumed).
• Percentage-based plans: Legacy Coding Plan accounts return current_interval_total_count: 0 but include current_interval_remaining_percent. The provider prefers this field when count fields are absent.
• model_remains array: Now contains entries for multiple model categories (chat, speech, video, image). The provider selects the chat-model entry by matching MiniMax-M*, then general/chat/text by name, then any entry with a remaining percent.
• Window status: The current_interval_status and current_weekly_status fields indicate whether a window is active. Status 3 means the window is not applicable for the current plan tier (e.g. legacy plans without weekly limits). The provider omits inactive windows.

Charm Hyper balance semantics

GET https://hyper.charm.land/v1/credits returns a team's current Hypercredit balance, not a percentage or reset timestamp. The Hyper FAQ defines one Hypercredit as $0.05. Both runtimes expose credits_balance in dollars and credits as a numeric label under the UI's localized window title. Keep English unit text out of that numeric label.

Web and VS Code accept finite numeric balances and non-empty numeric strings. Missing, blank, or malformed balances remain explicit failures; zero is valid. Credential lookup uses a non-empty string key, then token, so malformed or blank keys cannot mark the provider configured or hide a valid fallback token. Hyper fetchers accept readAuth and fetchImpl dependencies for tests without replacing filesystem or auth modules.

Kimi for Coding field semantics

GET https://api.kimi.com/coding/v1/usages is inconsistent about which field carries consumption:

• The weekly usage block returns used (consumed) with no remaining field.
• Each limits[].detail rate-limit block returns remaining (available) with no used field.

The provider computes usedPercent from whichever of used/remaining is present (used takes precedence when both exist) rather than assuming one field name. Both packages/web/server/lib/quota/providers/kimi.js and packages/vscode/src/quotaProviders.ts (fetchKimiQuota) must stay in sync — the VS Code extension duplicates this parsing logic rather than importing it.

Ollama Cloud settings-page shapes

Ollama Cloud authentication uses two cookies (aid and __Secure-session) pasted together as one single-line Cookie header value. Ollama serves two different /settings page shapes and parseOllamaSettingsHtml supports both: session/weekly/premium-interaction windows (percent-based plans) and a monthly window derived from "Monthly usage: $X of $Y used" (cost-based plans) with a symmetric $X / $Y money valueLabel that reads correctly in both used/remaining display modes. The "Extra usage" credits block is surfaced as a balance-only credits_balance window with a plain money valueLabel when present, matching the Codex/DeepSeek credits treatment ("Credits Balance" in the UI); a $0 balance is omitted instead of showing an empty credits row. Keep packages/web/server/lib/quota/providers/ollama-cloud.js and packages/vscode/src/quotaProviders.ts (parseOllamaSettingsHtml) in sync — the VS Code extension duplicates this parsing logic rather than importing it.

GitHub Copilot quota semantics

GitHub Copilot usage exposes only the premium_interactions snapshot as the premium_interactions window. Shared UI labels that window AI Credits and treats it as the provider's primary usage marker. Legacy chat-request quota and unlimited completion quota are intentionally omitted. Keep packages/web/server/lib/quota/providers/copilot.js and packages/vscode/src/quotaProviders.ts in sync.

The /copilot_internal/user endpoint is undocumented; its quota semantics mirror what microsoft/vscode-copilot-chat consumes (CopilotUserQuotaInfo). Each snapshot carries entitlement, remaining, unlimited, and percent_remaining. Providers must honor these rules:

• unlimited: true renders a percent-less window with an "Unlimited" value label.
• Percent math requires a positive entitlement; entitlements of 0, -1, or null are unusable.
• When entitlement/remaining are unusable, fall back to 100 - percent_remaining.
• Snapshots other than premium_interactions (legacy annual plans) yield zero windows.

Notes for contributors

• Keep provider IDs stable; clients use them directly.
• Avoid adding alias-based dispatch in fetchQuotaForProvider; dispatch currently expects exact provider IDs.
• Keep Google behavior changes isolated and review providers/google/* together.
• Z.ai Coding Plan exposes separate 5-hour and weekly token/credit limit entries plus a monthly TIME_LIMIT for MCP tools. The API renamed the limit type from TOKENS_LIMIT to CREDIT_LIMIT (same unit/number window semantics); CREDIT_LIMIT entries additionally carry usage (total), currentValue (consumed), and remaining, surfaced as a credit valueLabel, and the payload's data.level becomes planLabel. Web and VS Code must preserve these windows and stay in sync.