chore: import upstream snapshot with attribution

2026-07-13 12:22:33 +08:00
commit fc4fcbab58
1848 changed files with 472303 additions and 0 deletions
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+---
+summary: "Codex OAuth resolver: tokens, refresh, usage endpoint, and fetch strategy wiring."
+read_when:
+  - Adding or modifying Codex OAuth usage fetching
+  - Debugging auth.json parsing or token refresh behavior
+  - Adjusting Codex provider source selection
+---
+
+# Codex OAuth Resolver Implementation Plan
+
+> Replicate Codex's direct OAuth token usage in CodexBar instead of calling the CLI.
+
+## Background
+
+Currently, CodexBar fetches Codex usage by:
+1. Running `codex` CLI in PTY mode
+2. Sending `/status` command
+3. Parsing the text output
+
+This is slow and unreliable. The goal is to directly read Codex's OAuth tokens and call the same API endpoints that Codex uses internally.
+
+---
+
+## Codex OAuth Architecture (from source analysis)
+
+### Token Storage
+
+**Location:** `~/.codex/auth.json`
+
+```json
+{
+  "OPENAI_API_KEY": null,
+  "tokens": {
+    "id_token": "eyJ...",
+    "access_token": "eyJ...",
+    "refresh_token": "...",
+    "account_id": "account-..."
+  },
+  "last_refresh": "2025-12-28T12:34:56Z"
+}
+```
+
+**Source:** `codex-rs/core/src/auth/storage.rs`
+
+### Token Refresh
+
+**Endpoint:** `POST https://auth.openai.com/oauth/token`
+
+**Request:**
+```json
+{
+  "client_id": "app_EMoamEEZ73f0CkXaXp7hrann",
+  "grant_type": "refresh_token",
+  "refresh_token": "<refresh_token>",
+  "scope": "openid profile email"
+}
+```
+
+**Response:**
+```json
+{
+  "id_token": "eyJ...",
+  "access_token": "eyJ...",
+  "refresh_token": "..."
+}
+```
+
+**Refresh Interval:** 8 days (from `TOKEN_REFRESH_INTERVAL` constant)
+
+**Source:** `codex-rs/core/src/auth.rs:504-545`
+
+### Usage API
+
+**Endpoint:** `GET {chatgpt_base_url}/wham/usage` (default: `https://chatgpt.com/backend-api/wham/usage`)
+
+If `chatgpt_base_url` does not include `/backend-api`, Codex falls back to
+`{base_url}/api/codex/usage` (see `PathStyle` in `backend-client/src/client.rs`).
+
+**Headers:**
+```
+Authorization: Bearer <access_token>
+ChatGPT-Account-Id: <account_id>
+User-Agent: codex-cli
+```
+
+**Quick checks**
+- Command: `cat ~/.codex/auth.json`
+- Command: `curl -H "Authorization: Bearer <access_token>" -H "ChatGPT-Account-Id: <account_id>" -H "User-Agent: codex-cli" https://chatgpt.com/backend-api/wham/usage`
+- Command: `CodexBarCLI usage --provider codex --source oauth --json --pretty`
+
+**Response:**
+```json
+{
+  "plan_type": "pro",
+  "rate_limit": {
+    "primary_window": {
+      "used_percent": 15,
+      "reset_at": 1735401600,
+      "limit_window_seconds": 18000
+    },
+    "secondary_window": {
+      "used_percent": 5,
+      "reset_at": 1735920000,
+      "limit_window_seconds": 604800
+    }
+  },
+  "credits": {
+    "has_credits": true,
+    "unlimited": false,
+    "balance": 150.0
+  }
+}
+```
+
+**Source:** `codex-rs/backend-client/src/client.rs:161-170`
+
+---
+
+## Implementation
+
+### Files to Create
+
+| File | Location | Purpose |
+|------|----------|---------|
+| `CodexOAuthCredentials.swift` | `Sources/CodexBarCore/Providers/Codex/CodexOAuth/` | Token storage model + loader |
+| `CodexOAuthUsageFetcher.swift` | `Sources/CodexBarCore/Providers/Codex/CodexOAuth/` | API client for usage endpoint |
+| `CodexTokenRefresher.swift` | `Sources/CodexBarCore/Providers/Codex/CodexOAuth/` | Token refresh logic |
+
+### Files to Modify
+
+| File | Changes |
+|------|---------|
+| `CodexProviderDescriptor.swift` | Add `CodexOAuthFetchStrategy`, update `resolveStrategies()` |
+
+---
+
+### Step 1: CodexOAuthCredentials.swift
+
+```swift
+import Foundation
+
+public struct CodexOAuthCredentials: Sendable {
+    public let accessToken: String
+    public let refreshToken: String
+    public let idToken: String?
+    public let accountId: String?
+    public let lastRefresh: Date?
+
+    public var needsRefresh: Bool {
+        guard let last = lastRefresh else { return true }
+        let eightDays: TimeInterval = 8 * 24 * 3600
+        return Date().timeIntervalSince(last) > eightDays
+    }
+}
+
+public enum CodexOAuthCredentialsError: LocalizedError {
+    case notFound
+    case decodeFailed(String)
+    case missingTokens
+
+    public var errorDescription: String? {
+        switch self {
+        case .notFound:
+            "Codex auth.json not found. Run `codex` to log in."
+        case .decodeFailed(let msg):
+            "Failed to decode Codex credentials: \(msg)"
+        case .missingTokens:
+            "Codex auth.json exists but contains no tokens."
+        }
+    }
+}
+
+public enum CodexOAuthCredentialsStore {
+    private static var authFilePath: URL {
+        let home = FileManager.default.homeDirectoryForCurrentUser
+        // Respect CODEX_HOME if set
+        if let codexHome = ProcessInfo.processInfo.environment["CODEX_HOME"],
+           !codexHome.isEmpty {
+            return URL(fileURLWithPath: codexHome).appendingPathComponent("auth.json")
+        }
+        return home.appendingPathComponent(".codex/auth.json")
+    }
+
+    public static func load() throws -> CodexOAuthCredentials {
+        let url = authFilePath
+        guard FileManager.default.fileExists(atPath: url.path) else {
+            throw CodexOAuthCredentialsError.notFound
+        }
+
+        let data = try Data(contentsOf: url)
+        guard let json = try JSONSerialization.jsonObject(with: data) as? [String: Any] else {
+            throw CodexOAuthCredentialsError.decodeFailed("Invalid JSON")
+        }
+
+        // Check for API key auth (no tokens needed for refresh)
+        if let apiKey = json["OPENAI_API_KEY"] as? String, !apiKey.isEmpty {
+            return CodexOAuthCredentials(
+                accessToken: apiKey,
+                refreshToken: "",
+                idToken: nil,
+                accountId: nil,
+                lastRefresh: nil)
+        }
+
+        guard let tokens = json["tokens"] as? [String: Any],
+              let accessToken = tokens["access_token"] as? String,
+              let refreshToken = tokens["refresh_token"] as? String else {
+            throw CodexOAuthCredentialsError.missingTokens
+        }
+
+        let idToken = tokens["id_token"] as? String
+        let accountId = tokens["account_id"] as? String
+
+        let lastRefresh: Date? = {
+            guard let str = json["last_refresh"] as? String else { return nil }
+            let formatter = ISO8601DateFormatter()
+            formatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
+            return formatter.date(from: str) ?? ISO8601DateFormatter().date(from: str)
+        }()
+
+        return CodexOAuthCredentials(
+            accessToken: accessToken,
+            refreshToken: refreshToken,
+            idToken: idToken,
+            accountId: accountId,
+            lastRefresh: lastRefresh)
+    }
+
+    public static func save(_ credentials: CodexOAuthCredentials) throws {
+        let url = authFilePath
+
+        // Read existing file to preserve structure
+        var json: [String: Any] = [:]
+        if let data = try? Data(contentsOf: url),
+           let existing = try? JSONSerialization.jsonObject(with: data) as? [String: Any] {
+            json = existing
+        }
+
+        var tokens: [String: Any] = [
+            "access_token": credentials.accessToken,
+            "refresh_token": credentials.refreshToken
+        ]
+        if let idToken = credentials.idToken {
+            tokens["id_token"] = idToken
+        }
+        if let accountId = credentials.accountId {
+            tokens["account_id"] = accountId
+        }
+
+        json["tokens"] = tokens
+        json["last_refresh"] = ISO8601DateFormatter().string(from: Date())
+
+        let data = try JSONSerialization.data(withJSONObject: json, options: [.prettyPrinted, .sortedKeys])
+        try data.write(to: url, options: .atomic)
+    }
+}
+```
+
+---
+
+### Step 2: CodexOAuthUsageFetcher.swift
+
+```swift
+import Foundation
+
+public struct CodexUsageResponse: Decodable, Sendable {
+    public let planType: PlanType
+    public let rateLimit: RateLimitDetails?
+    public let credits: CreditDetails?
+
+    enum CodingKeys: String, CodingKey {
+        case planType = "plan_type"
+        case rateLimit = "rate_limit"
+        case credits
+    }
+
+    public enum PlanType: String, Decodable, Sendable {
+        case guest, free, go, plus, pro
+        case freeWorkspace = "free_workspace"
+        case team, business, education, quorum, k12, enterprise, edu
+    }
+
+    public struct RateLimitDetails: Decodable, Sendable {
+        public let primaryWindow: WindowSnapshot?
+        public let secondaryWindow: WindowSnapshot?
+
+        enum CodingKeys: String, CodingKey {
+            case primaryWindow = "primary_window"
+            case secondaryWindow = "secondary_window"
+        }
+    }
+
+    public struct WindowSnapshot: Decodable, Sendable {
+        public let usedPercent: Int
+        public let resetAt: Int
+        public let limitWindowSeconds: Int
+
+        enum CodingKeys: String, CodingKey {
+            case usedPercent = "used_percent"
+            case resetAt = "reset_at"
+            case limitWindowSeconds = "limit_window_seconds"
+        }
+    }
+
+    public struct CreditDetails: Decodable, Sendable {
+        public let hasCredits: Bool
+        public let unlimited: Bool
+        public let balance: Double?
+
+        enum CodingKeys: String, CodingKey {
+            case hasCredits = "has_credits"
+            case unlimited
+            case balance
+        }
+    }
+}
+
+public enum CodexOAuthFetchError: LocalizedError, Sendable {
+    case unauthorized
+    case invalidResponse
+    case serverError(Int, String?)
+    case networkError(Error)
+
+    public var errorDescription: String? {
+        switch self {
+        case .unauthorized:
+            "Codex OAuth token expired or invalid. Run `codex` to re-authenticate."
+        case .invalidResponse:
+            "Invalid response from Codex usage API."
+        case .serverError(let code, let msg):
+            "Codex API error \(code): \(msg ?? "unknown")"
+        case .networkError(let error):
+            "Network error: \(error.localizedDescription)"
+        }
+    }
+}
+
+public enum CodexOAuthUsageFetcher {
+    private static let defaultChatGPTBaseURL = "https://chatgpt.com/backend-api/"
+    private static let chatGPTUsagePath = "/wham/usage"
+    private static let codexUsagePath = "/api/codex/usage"
+
+    public static func fetchUsage(
+        accessToken: String,
+        accountId: String?
+    ) async throws -> CodexUsageResponse {
+        var request = URLRequest(url: resolveUsageURL())
+        request.httpMethod = "GET"
+        request.setValue("Bearer \(accessToken)", forHTTPHeaderField: "Authorization")
+        request.setValue("CodexBar", forHTTPHeaderField: "User-Agent")
+        request.setValue("application/json", forHTTPHeaderField: "Accept")
+
+        if let accountId {
+            request.setValue(accountId, forHTTPHeaderField: "ChatGPT-Account-Id")
+        }
+
+        let (data, response): (Data, URLResponse)
+        do {
+            (data, response) = try await URLSession.shared.data(for: request)
+        } catch {
+            throw CodexOAuthFetchError.networkError(error)
+        }
+
+        guard let http = response as? HTTPURLResponse else {
+            throw CodexOAuthFetchError.invalidResponse
+        }
+
+        switch http.statusCode {
+        case 200...299:
+            do {
+                return try JSONDecoder().decode(CodexUsageResponse.self, from: data)
+            } catch {
+                throw CodexOAuthFetchError.invalidResponse
+            }
+        case 401, 403:
+            throw CodexOAuthFetchError.unauthorized
+        default:
+            let body = String(data: data, encoding: .utf8)
+            throw CodexOAuthFetchError.serverError(http.statusCode, body)
+        }
+    }
+}
+```
+
+---
+
+### Step 3: CodexTokenRefresher.swift
+
+```swift
+import Foundation
+
+public enum CodexTokenRefresher {
+    private static let refreshEndpoint = URL(string: "https://auth.openai.com/oauth/token")!
+    private static let clientID = "app_EMoamEEZ73f0CkXaXp7hrann"
+
+    public enum RefreshError: LocalizedError {
+        case expired
+        case revoked
+        case reused
+        case networkError(Error)
+        case invalidResponse(String)
+
+        public var errorDescription: String? {
+            switch self {
+            case .expired:
+                "Refresh token expired. Please run `codex` to log in again."
+            case .revoked:
+                "Refresh token was revoked. Please run `codex` to log in again."
+            case .reused:
+                "Refresh token was already used. Please run `codex` to log in again."
+            case .networkError(let error):
+                "Network error during token refresh: \(error.localizedDescription)"
+            case .invalidResponse(let msg):
+                "Invalid refresh response: \(msg)"
+            }
+        }
+    }
+
+    public static func refresh(_ credentials: CodexOAuthCredentials) async throws -> CodexOAuthCredentials {
+        guard !credentials.refreshToken.isEmpty else {
+            // API key auth - no refresh needed
+            return credentials
+        }
+
+        var request = URLRequest(url: refreshEndpoint)
+        request.httpMethod = "POST"
+        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
+
+        let body: [String: String] = [
+            "client_id": clientID,
+            "grant_type": "refresh_token",
+            "refresh_token": credentials.refreshToken,
+            "scope": "openid profile email"
+        ]
+        request.httpBody = try JSONSerialization.data(withJSONObject: body)
+
+        let (data, response): (Data, URLResponse)
+        do {
+            (data, response) = try await URLSession.shared.data(for: request)
+        } catch {
+            throw RefreshError.networkError(error)
+        }
+
+        guard let http = response as? HTTPURLResponse else {
+            throw RefreshError.invalidResponse("No HTTP response")
+        }
+
+        if http.statusCode == 401 {
+            // Parse error code to classify failure
+            if let json = try? JSONSerialization.jsonObject(with: data) as? [String: Any],
+               let errorCode = (json["error"] as? [String: Any])?["code"] as? String
+                              ?? json["error"] as? String
+                              ?? json["code"] as? String {
+                switch errorCode.lowercased() {
+                case "refresh_token_expired": throw RefreshError.expired
+                case "refresh_token_reused": throw RefreshError.reused
+                case "refresh_token_invalidated": throw RefreshError.revoked
+                default: throw RefreshError.expired
+                }
+            }
+            throw RefreshError.expired
+        }
+
+        guard http.statusCode == 200 else {
+            throw RefreshError.invalidResponse("Status \(http.statusCode)")
+        }
+
+        guard let json = try? JSONSerialization.jsonObject(with: data) as? [String: Any] else {
+            throw RefreshError.invalidResponse("Invalid JSON")
+        }
+
+        let newAccessToken = json["access_token"] as? String ?? credentials.accessToken
+        let newRefreshToken = json["refresh_token"] as? String ?? credentials.refreshToken
+        let newIdToken = json["id_token"] as? String ?? credentials.idToken
+
+        return CodexOAuthCredentials(
+            accessToken: newAccessToken,
+            refreshToken: newRefreshToken,
+            idToken: newIdToken,
+            accountId: credentials.accountId,
+            lastRefresh: Date())
+    }
+}
+```
+
+---
+
+### Step 4: Update CodexProviderDescriptor.swift
+
+Add OAuth to `sourceModes` and create new strategy:
+
+```swift
+// In makeDescriptor(), update fetchPlan:
+fetchPlan: ProviderFetchPlan(
+    sourceModes: [.auto, .oauth, .web, .cli],  // Add .oauth
+    pipeline: ProviderFetchPipeline(resolveStrategies: self.resolveStrategies)),
+
+// Update resolveStrategies:
+private static func resolveStrategies(context: ProviderFetchContext) async -> [any ProviderFetchStrategy] {
+    let oauth = CodexOAuthFetchStrategy()
+    let cli = CodexCLIUsageStrategy()
+    let web = CodexWebDashboardStrategy()
+
+    switch context.sourceMode {
+    case .oauth:
+        return [oauth]
+    case .web:
+        return [web]
+    case .cli:
+        return [cli]
+    case .auto:
+        // OAuth first (fast), CLI fallback
+        if context.runtime == .cli {
+            return [web, cli]
+        }
+        return [oauth, cli]
+    }
+}
+
+// Add new strategy:
+struct CodexOAuthFetchStrategy: ProviderFetchStrategy {
+    let id: String = "codex.oauth"
+    let kind: ProviderFetchKind = .oauth
+
+    func isAvailable(_ context: ProviderFetchContext) async -> Bool {
+        (try? CodexOAuthCredentialsStore.load()) != nil
+    }
+
+    func fetch(_ context: ProviderFetchContext) async throws -> ProviderFetchResult {
+        var creds = try CodexOAuthCredentialsStore.load()
+
+        // Refresh if needed (8+ days old)
+        if creds.needsRefresh && !creds.refreshToken.isEmpty {
+            creds = try await CodexTokenRefresher.refresh(creds)
+            try CodexOAuthCredentialsStore.save(creds)
+        }
+
+        let usage = try await CodexOAuthUsageFetcher.fetchUsage(
+            accessToken: creds.accessToken,
+            accountId: creds.accountId)
+
+        return makeResult(
+            usage: Self.mapUsage(usage),
+            credits: Self.mapCredits(usage.credits),
+            sourceLabel: "oauth")
+    }
+
+    func shouldFallback(on error: Error, context: ProviderFetchContext) -> Bool {
+        // Fallback to CLI on auth errors
+        if let fetchError = error as? CodexOAuthFetchError {
+            switch fetchError {
+            case .unauthorized: return true
+            default: return false
+            }
+        }
+        if error is CodexOAuthCredentialsError { return true }
+        if error is CodexTokenRefresher.RefreshError { return true }
+        return false
+    }
+
+    private static func mapUsage(_ response: CodexUsageResponse) -> UsageSnapshot {
+        let primary: RateWindow? = response.rateLimit?.primaryWindow.map { window in
+            RateWindow(
+                usedPercent: Double(window.usedPercent),
+                windowMinutes: window.limitWindowSeconds / 60,
+                resetsAt: Date(timeIntervalSince1970: TimeInterval(window.resetAt)),
+                resetDescription: nil)
+        }
+
+        let secondary: RateWindow? = response.rateLimit?.secondaryWindow.map { window in
+            RateWindow(
+                usedPercent: Double(window.usedPercent),
+                windowMinutes: window.limitWindowSeconds / 60,
+                resetsAt: Date(timeIntervalSince1970: TimeInterval(window.resetAt)),
+                resetDescription: nil)
+        }
+
+        let identity = ProviderIdentitySnapshot(
+            providerID: .codex,
+            accountEmail: nil,
+            accountOrganization: nil,
+            loginMethod: response.planType.rawValue)
+
+        return UsageSnapshot(
+            primary: primary ?? RateWindow(usedPercent: 0, windowMinutes: nil, resetsAt: nil, resetDescription: nil),
+            secondary: secondary,
+            tertiary: nil,
+            providerCost: nil,
+            updatedAt: Date(),
+            identity: identity)
+    }
+
+    private static func mapCredits(_ credits: CodexUsageResponse.CreditDetails?) -> CreditsSnapshot? {
+        guard let credits else { return nil }
+        return CreditsSnapshot(
+            hasCredits: credits.hasCredits,
+            unlimited: credits.unlimited,
+            balance: credits.balance)
+    }
+}
+```
+
+---
+
+## Constants Reference
+
+| Constant | Value | Source |
+|----------|-------|--------|
+| Client ID | `app_EMoamEEZ73f0CkXaXp7hrann` | `auth.rs:618` |
+| Refresh URL | `https://auth.openai.com/oauth/token` | `auth.rs:66` |
+| Usage URL | `https://chatgpt.com/backend-api/wham/usage` (default) | `client.rs:163` |
+| Token refresh interval | 8 days | `auth.rs:59` |
+| Auth file | `~/.codex/auth.json` | `storage.rs` |
+
+---
+
+## Testing
+
+1. Ensure `~/.codex/auth.json` exists (run `codex` to log in first)
+2. Run CodexBar with debug logging enabled
+3. Verify OAuth strategy is selected and API calls succeed
+4. Test token refresh by manually setting `last_refresh` to old date
+5. Test fallback by temporarily renaming auth.json
+
+---
+
+## Error Handling
+
+| Error | Behavior |
+|-------|----------|
+| No auth.json | Fall back to CLI strategy |
+| Token expired | Attempt refresh, fall back to CLI on failure |
+| Refresh failed | Log error, fall back to CLI |
+| API error | Fall back to CLI |
+| Network error | Retry with backoff, then fall back |