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Passed directly to OpenCode SDK. | -| `thinking` | object | Extended thinking configuration for Anthropic models. See [Thinking Options](#thinking-options) below. | -| `reasoningEffort` | string | OpenAI reasoning effort level. Values: `low`, `medium`, `high`, `xhigh`. | -| `textVerbosity` | string | Text verbosity level. Values: `low`, `medium`, `high`. | -| `providerOptions` | object | Provider-specific options passed directly to OpenCode SDK. | +| Option | Type | Description | +| ------------------- | -------------- | ----------------------------------------------------------------------------------------------- | +| `fallback_models` | string/array | Fallback models for runtime switching on API errors. Single string or array of model strings. | +| `category` | string | Category name to inherit model and other settings from category defaults | +| `variant` | string | Model variant (e.g., `max`, `high`, `medium`, `low`, `xhigh`) | +| `maxTokens` | number | Maximum tokens for response. Passed directly to OpenCode SDK. | +| `thinking` | object | Extended thinking configuration for Anthropic models. See [Thinking Options](#thinking-options) below. | +| `reasoningEffort` | string | OpenAI reasoning effort level. Values: `low`, `medium`, `high`, `xhigh`. | +| `textVerbosity` | string | Text verbosity level. Values: `low`, `medium`, `high`. | +| `providerOptions` | object | Provider-specific options passed directly to OpenCode SDK. | #### Thinking Options (Anthropic) @@ -714,6 +715,63 @@ Configure concurrency limits for background agent tasks. This controls how many - Allow more concurrent tasks for fast/cheap models (e.g., Gemini Flash) - Respect provider rate limits by setting provider-level caps +## Runtime Fallback + +Automatically switch to backup models when the primary model encounters transient API errors (rate limits, overload, etc.). This keeps conversations running without manual intervention. + +```json +{ + "runtime_fallback": { + "enabled": true, + "retry_on_errors": [429, 503, 529], + "max_fallback_attempts": 3, + "cooldown_seconds": 60, + "notify_on_fallback": true + } +} +``` + +| Option | Default | Description | +| ----------------------- | ----------------- | --------------------------------------------------------------------------- | +| `enabled` | `true` | Enable runtime fallback | +| `retry_on_errors` | `[429, 503, 529]` | HTTP status codes that trigger fallback (rate limit, service unavailable) | +| `max_fallback_attempts` | `3` | Maximum fallback attempts per session (1-10) | +| `cooldown_seconds` | `60` | Cooldown in seconds before retrying a failed model | +| `notify_on_fallback` | `true` | Show toast notification when switching to a fallback model | + +### How It Works + +1. When an API error matching `retry_on_errors` occurs, the hook intercepts it +2. The next request automatically uses the next available model from `fallback_models` +3. Failed models enter a cooldown period before being retried +4. Toast notification (optional) informs you of the model switch + +### Configuring Fallback Models + +Define `fallback_models` at the agent or category level: + +```json +{ + "agents": { + "sisyphus": { + "model": "anthropic/claude-opus-4-5", + "fallback_models": ["openai/gpt-5.2", "google/gemini-3-pro"] + } + }, + "categories": { + "ultrabrain": { + "model": "openai/gpt-5.2-codex", + "fallback_models": ["anthropic/claude-opus-4-5", "google/gemini-3-pro"] + } + } +} +``` + +When the primary model fails: +1. First fallback: `openai/gpt-5.2` +2. Second fallback: `google/gemini-3-pro` +3. After `max_fallback_attempts`, returns to primary model + ## Categories Categories enable domain-specific task delegation via the `task` tool. Each category applies runtime presets (model, temperature, prompt additions) when calling the `Sisyphus-Junior` agent. @@ -825,14 +883,72 @@ Add your own categories or override built-in ones: } ``` -Each category supports: `model`, `temperature`, `top_p`, `maxTokens`, `thinking`, `reasoningEffort`, `textVerbosity`, `tools`, `prompt_append`, `variant`, `description`, `is_unstable_agent`. +Each category supports: `model`, `fallback_models`, `temperature`, `top_p`, `maxTokens`, `thinking`, `reasoningEffort`, `textVerbosity`, `tools`, `prompt_append`, `variant`, `description`, `is_unstable_agent`. ### Additional Category Options -| Option | Type | Default | Description | -| ------------------ | ------- | ------- | --------------------------------------------------------------------------------------------------- | -| `description` | string | - | Human-readable description of the category's purpose. Shown in task prompt. | -| `is_unstable_agent`| boolean | `false` | Mark agent as unstable - forces background mode for monitoring. Auto-enabled for gemini models. | +| Option | Type | Default | Description | +| ------------------- | ------------ | ------- | --------------------------------------------------------------------------------------------------- | +| `fallback_models` | string/array | - | Fallback models for runtime switching on API errors. Single string or array of model strings. | +| `description` | string | - | Human-readable description of the category's purpose. Shown in task prompt. | +| `is_unstable_agent` | boolean | `false` | Mark agent as unstable - forces background mode for monitoring. Auto-enabled for gemini models. | + +## Runtime Fallback + +Automatically switch to backup models when the primary model encounters transient API errors (rate limits, overload, etc.). This keeps conversations running without manual intervention. + +```json +{ + "runtime_fallback": { + "enabled": true, + "retry_on_errors": [429, 503, 529], + "max_fallback_attempts": 3, + "cooldown_seconds": 60, + "notify_on_fallback": true + } +} +``` + +| Option | Default | Description | +| ----------------------- | ----------------- | --------------------------------------------------------------------------- | +| `enabled` | `true` | Enable runtime fallback | +| `retry_on_errors` | `[429, 503, 529]` | HTTP status codes that trigger fallback (rate limit, service unavailable) | +| `max_fallback_attempts` | `3` | Maximum fallback attempts per session (1-10) | +| `cooldown_seconds` | `60` | Cooldown in seconds before retrying a failed model | +| `notify_on_fallback` | `true` | Show toast notification when switching to a fallback model | + +### How It Works + +1. When an API error matching `retry_on_errors` occurs, the hook intercepts it +2. The next request automatically uses the next available model from `fallback_models` +3. Failed models enter a cooldown period before being retried +4. Toast notification (optional) informs you of the model switch + +### Configuring Fallback Models + +Define `fallback_models` at the agent or category level: + +```json +{ + "agents": { + "sisyphus": { + "model": "anthropic/claude-opus-4-5", + "fallback_models": ["openai/gpt-5.2", "google/gemini-3-pro"] + } + }, + "categories": { + "ultrabrain": { + "model": "openai/gpt-5.2-codex", + "fallback_models": ["anthropic/claude-opus-4-5", "google/gemini-3-pro"] + } + } +} +``` + +When the primary model fails: +1. First fallback: `openai/gpt-5.2` +2. Second fallback: `google/gemini-3-pro` +3. After `max_fallback_attempts`, returns to primary model ## Model Resolution System @@ -967,7 +1083,7 @@ Disable specific built-in hooks via `disabled_hooks` in `~/.config/opencode/oh-m } ``` -Available hooks: `todo-continuation-enforcer`, `context-window-monitor`, `session-recovery`, `session-notification`, `comment-checker`, `grep-output-truncator`, `tool-output-truncator`, `directory-agents-injector`, `directory-readme-injector`, `empty-task-response-detector`, `think-mode`, `anthropic-context-window-limit-recovery`, `rules-injector`, `background-notification`, `auto-update-checker`, `startup-toast`, `keyword-detector`, `agent-usage-reminder`, `non-interactive-env`, `interactive-bash-session`, `compaction-context-injector`, `thinking-block-validator`, `claude-code-hooks`, `ralph-loop`, `preemptive-compaction`, `auto-slash-command`, `sisyphus-junior-notepad`, `start-work` +Available hooks: `todo-continuation-enforcer`, `context-window-monitor`, `session-recovery`, `session-notification`, `comment-checker`, `grep-output-truncator`, `tool-output-truncator`, `directory-agents-injector`, `directory-readme-injector`, `empty-task-response-detector`, `think-mode`, `anthropic-context-window-limit-recovery`, `rules-injector`, `background-notification`, `auto-update-checker`, `startup-toast`, `keyword-detector`, `agent-usage-reminder`, `non-interactive-env`, `interactive-bash-session`, `compaction-context-injector`, `thinking-block-validator`, `claude-code-hooks`, `ralph-loop`, `preemptive-compaction`, `auto-slash-command`, `sisyphus-junior-notepad`, `start-work`, `runtime-fallback` **Note on `directory-agents-injector`**: This hook is **automatically disabled** when running on OpenCode 1.1.37+ because OpenCode now has native support for dynamically resolving AGENTS.md files from subdirectories (PR #10678). This prevents duplicate AGENTS.md injection. For older OpenCode versions, the hook remains active to provide the same functionality. diff --git a/docs/features.md b/docs/features.md index f73f7a656d..c88c6f4407 100644 --- a/docs/features.md +++ b/docs/features.md @@ -352,6 +352,7 @@ Hooks intercept and modify behavior at key points in the agent lifecycle. | **session-recovery** | Stop | Recovers from session errors - missing tool results, thinking block issues, empty messages. | | **anthropic-context-window-limit-recovery** | Stop | Handles Claude context window limits gracefully. | | **background-compaction** | Stop | Auto-compacts sessions hitting token limits. | +| **runtime-fallback** | Event | Automatically switches to backup models on API errors (429, 503, 529). Configurable retry logic with per-model cooldown. | #### Truncation & Context Management diff --git a/src/agents/types.ts b/src/agents/types.ts index 14da69a183..309b71cd92 100644 --- a/src/agents/types.ts +++ b/src/agents/types.ts @@ -90,6 +90,7 @@ export type AgentName = BuiltinAgentName export type AgentOverrideConfig = Partial & { prompt_append?: string variant?: string + fallback_models?: string | string[] } export type AgentOverrides = Partial> diff --git a/src/agents/utils.test.ts b/src/agents/utils.test.ts index 6dc8436898..b49cbd413c 100644 --- a/src/agents/utils.test.ts +++ b/src/agents/utils.test.ts @@ -51,7 +51,7 @@ describe("createBuiltinAgents with model overrides", () => { expect(agents.sisyphus.thinking).toBeUndefined() }) - test("Atlas uses uiSelectedModel when provided", async () => { + test("Atlas does not use uiSelectedModel (respects its own fallback chain)", async () => { // #given const fetchSpy = spyOn(shared, "fetchAvailableModels").mockResolvedValue( new Set(["openai/gpt-5.2", "anthropic/claude-sonnet-4-5"]) @@ -75,7 +75,7 @@ describe("createBuiltinAgents with model overrides", () => { // #then expect(agents.atlas).toBeDefined() - expect(agents.atlas.model).toBe("openai/gpt-5.2") + expect(agents.atlas.model).toBe("anthropic/claude-sonnet-4-5") } finally { fetchSpy.mockRestore() } diff --git a/src/config/index.ts b/src/config/index.ts index 5f881831ba..f18b87c333 100644 --- a/src/config/index.ts +++ b/src/config/index.ts @@ -29,4 +29,6 @@ export type { TmuxLayout, SisyphusConfig, SisyphusTasksConfig, + RuntimeFallbackConfig, + FallbackModels, } from "./schema" diff --git a/src/config/schema.ts b/src/config/schema.ts index e4c55c6ff3..02326bff13 100644 --- a/src/config/schema.ts +++ b/src/config/schema.ts @@ -14,6 +14,7 @@ export * from "./schema/hooks" export * from "./schema/notification" export * from "./schema/oh-my-opencode-config" export * from "./schema/ralph-loop" +export * from "./schema/runtime-fallback" export * from "./schema/skills" export * from "./schema/sisyphus" export * from "./schema/sisyphus-agent" diff --git a/src/config/schema/agent-overrides.ts b/src/config/schema/agent-overrides.ts index 8fd48e330c..f642e36544 100644 --- a/src/config/schema/agent-overrides.ts +++ b/src/config/schema/agent-overrides.ts @@ -1,5 +1,6 @@ import { z } from "zod" import { AgentPermissionSchema } from "./internal/permission" +import { FallbackModelsSchema } from "./runtime-fallback" export const AgentOverrideConfigSchema = z.object({ /** @deprecated Use `category` instead. Model is inherited from category defaults. */ @@ -37,6 +38,8 @@ export const AgentOverrideConfigSchema = z.object({ textVerbosity: z.enum(["low", "medium", "high"]).optional(), /** Provider-specific options. Passed directly to OpenCode SDK. */ providerOptions: z.record(z.string(), z.unknown()).optional(), + /** Fallback models for runtime switching on API errors. Single string or array of model strings. */ + fallback_models: FallbackModelsSchema.optional(), }) export const AgentOverridesSchema = z.object({ diff --git a/src/config/schema/categories.ts b/src/config/schema/categories.ts index b8028c5721..d0a38997d8 100644 --- a/src/config/schema/categories.ts +++ b/src/config/schema/categories.ts @@ -1,4 +1,5 @@ import { z } from "zod" +import { FallbackModelsSchema } from "./runtime-fallback" export const CategoryConfigSchema = z.object({ /** Human-readable description of the category's purpose. Shown in task prompt. */ @@ -20,6 +21,8 @@ export const CategoryConfigSchema = z.object({ prompt_append: z.string().optional(), /** Mark agent as unstable - forces background mode for monitoring. Auto-enabled for gemini/minimax models. */ is_unstable_agent: z.boolean().optional(), + /** Fallback models for runtime switching on API errors. Single string or array of model strings. */ + fallback_models: FallbackModelsSchema.optional(), }) export const BuiltinCategoryNameSchema = z.enum([ diff --git a/src/config/schema/hooks.ts b/src/config/schema/hooks.ts index bb5f6bdb0b..53a360588d 100644 --- a/src/config/schema/hooks.ts +++ b/src/config/schema/hooks.ts @@ -46,6 +46,7 @@ export const HookNameSchema = z.enum([ "tasks-todowrite-disabler", "write-existing-file-guard", "anthropic-effort", + "runtime-fallback", ]) export type HookName = z.infer diff --git a/src/config/schema/oh-my-opencode-config.ts b/src/config/schema/oh-my-opencode-config.ts index be0ebd9149..f1eeff96ce 100644 --- a/src/config/schema/oh-my-opencode-config.ts +++ b/src/config/schema/oh-my-opencode-config.ts @@ -14,6 +14,7 @@ import { GitMasterConfigSchema } from "./git-master" import { HookNameSchema } from "./hooks" import { NotificationConfigSchema } from "./notification" import { RalphLoopConfigSchema } from "./ralph-loop" +import { RuntimeFallbackConfigSchema } from "./runtime-fallback" import { SkillsConfigSchema } from "./skills" import { SisyphusConfigSchema } from "./sisyphus" import { SisyphusAgentConfigSchema } from "./sisyphus-agent" @@ -42,6 +43,7 @@ export const OhMyOpenCodeConfigSchema = z.object({ auto_update: z.boolean().optional(), skills: SkillsConfigSchema.optional(), ralph_loop: RalphLoopConfigSchema.optional(), + runtime_fallback: RuntimeFallbackConfigSchema.optional(), background_task: BackgroundTaskConfigSchema.optional(), notification: NotificationConfigSchema.optional(), babysitting: BabysittingConfigSchema.optional(), diff --git a/src/config/schema/runtime-fallback.ts b/src/config/schema/runtime-fallback.ts new file mode 100644 index 0000000000..b80f9a8ff3 --- /dev/null +++ b/src/config/schema/runtime-fallback.ts @@ -0,0 +1,19 @@ +import { z } from "zod" + +export const FallbackModelsSchema = z.union([z.string(), z.array(z.string())]) + +export const RuntimeFallbackConfigSchema = z.object({ + /** Enable runtime fallback (default: true) */ + enabled: z.boolean().optional(), + /** HTTP status codes that trigger fallback (default: [429, 503, 529]) */ + retry_on_errors: z.array(z.number()).optional(), + /** Maximum fallback attempts per session (default: 3) */ + max_fallback_attempts: z.number().min(1).max(10).optional(), + /** Cooldown in seconds before retrying a failed model (default: 60) */ + cooldown_seconds: z.number().min(0).optional(), + /** Show toast notification when switching to fallback model (default: true) */ + notify_on_fallback: z.boolean().optional(), +}) + +export type RuntimeFallbackConfig = z.infer +export type FallbackModels = z.infer diff --git a/src/features/background-agent/manager.ts b/src/features/background-agent/manager.ts index 7872bebbe6..3ede32fabc 100644 --- a/src/features/background-agent/manager.ts +++ b/src/features/background-agent/manager.ts @@ -5,7 +5,7 @@ import type { LaunchInput, ResumeInput, } from "./types" -import { log, getAgentToolRestrictions, promptWithModelSuggestionRetry } from "../../shared" +import { log, getAgentToolRestrictions, promptWithModelSuggestionRetry, SessionCategoryRegistry } from "../../shared" import { ConcurrencyManager } from "./concurrency" import type { BackgroundTaskConfig, TmuxConfig } from "../../config/schema" import { isInsideTmux } from "../../shared/tmux" @@ -780,6 +780,7 @@ export class BackgroundManager { this.clearNotificationsForTask(task.id) if (task.sessionID) { subagentSessions.delete(task.sessionID) + SessionCategoryRegistry.remove(task.sessionID) } } } @@ -944,6 +945,8 @@ export class BackgroundManager { this.client.session.abort({ path: { id: task.sessionID }, }).catch(() => {}) + + SessionCategoryRegistry.remove(task.sessionID) } if (options?.skipNotification) { @@ -1086,6 +1089,8 @@ export class BackgroundManager { this.client.session.abort({ path: { id: task.sessionID }, }).catch(() => {}) + + SessionCategoryRegistry.remove(task.sessionID) } try { @@ -1327,6 +1332,7 @@ Use \`background_output(task_id="${task.id}")\` to retrieve this result when rea this.tasks.delete(taskId) if (task.sessionID) { subagentSessions.delete(task.sessionID) + SessionCategoryRegistry.remove(task.sessionID) } } } diff --git a/src/hooks/index.ts b/src/hooks/index.ts index 9544752778..16e9a6cae5 100644 --- a/src/hooks/index.ts +++ b/src/hooks/index.ts @@ -44,3 +44,4 @@ export { createUnstableAgentBabysitterHook } from "./unstable-agent-babysitter"; export { createPreemptiveCompactionHook } from "./preemptive-compaction"; export { createTasksTodowriteDisablerHook } from "./tasks-todowrite-disabler"; export { createWriteExistingFileGuardHook } from "./write-existing-file-guard"; +export { createRuntimeFallbackHook, type RuntimeFallbackHook, type RuntimeFallbackOptions } from "./runtime-fallback"; diff --git a/src/hooks/runtime-fallback/constants.ts b/src/hooks/runtime-fallback/constants.ts new file mode 100644 index 0000000000..f3f25956ca --- /dev/null +++ b/src/hooks/runtime-fallback/constants.ts @@ -0,0 +1,40 @@ +/** + * Runtime Fallback Hook - Constants + * + * Default values and configuration constants for the runtime fallback feature. + */ + +import type { RuntimeFallbackConfig } from "../../config" + +/** + * Default configuration values for runtime fallback + */ +export const DEFAULT_CONFIG: Required = { + enabled: true, + retry_on_errors: [429, 503, 529], + max_fallback_attempts: 3, + cooldown_seconds: 60, + notify_on_fallback: true, +} + +/** + * Error patterns that indicate rate limiting or temporary failures + * These are checked in addition to HTTP status codes + */ +export const RETRYABLE_ERROR_PATTERNS = [ + /rate.?limit/i, + /too.?many.?requests/i, + /quota.?exceeded/i, + /service.?unavailable/i, + /overloaded/i, + /temporarily.?unavailable/i, + /try.?again/i, + /(?:^|\s)429(?:\s|$)/, + /(?:^|\s)503(?:\s|$)/, + /(?:^|\s)529(?:\s|$)/, +] + +/** + * Hook name for identification and logging + */ +export const HOOK_NAME = "runtime-fallback" diff --git a/src/hooks/runtime-fallback/index.test.ts b/src/hooks/runtime-fallback/index.test.ts new file mode 100644 index 0000000000..bd4a0122e9 --- /dev/null +++ b/src/hooks/runtime-fallback/index.test.ts @@ -0,0 +1,662 @@ +import { describe, expect, test, beforeEach, afterEach, spyOn } from "bun:test" +import { createRuntimeFallbackHook, type RuntimeFallbackHook } from "./index" +import type { RuntimeFallbackConfig, OhMyOpenCodeConfig } from "../../config" +import * as sharedModule from "../../shared" +import { SessionCategoryRegistry } from "../../shared/session-category-registry" + +describe("runtime-fallback", () => { + let logCalls: Array<{ msg: string; data?: unknown }> + let logSpy: ReturnType + let toastCalls: Array<{ title: string; message: string; variant: string }> + + beforeEach(() => { + logCalls = [] + toastCalls = [] + SessionCategoryRegistry.clear() + logSpy = spyOn(sharedModule, "log").mockImplementation((msg: string, data?: unknown) => { + logCalls.push({ msg, data }) + }) + }) + + afterEach(() => { + SessionCategoryRegistry.clear() + logSpy?.mockRestore() + }) + + function createMockPluginInput() { + return { + client: { + tui: { + showToast: async (opts: { body: { title: string; message: string; variant: string; duration: number } }) => { + toastCalls.push({ + title: opts.body.title, + message: opts.body.message, + variant: opts.body.variant, + }) + }, + }, + }, + directory: "/test/dir", + } as any + } + + function createMockConfig(overrides?: Partial): RuntimeFallbackConfig { + return { + enabled: true, + retry_on_errors: [429, 503, 529], + max_fallback_attempts: 3, + cooldown_seconds: 60, + notify_on_fallback: true, + ...overrides, + } + } + + function createMockPluginConfigWithCategoryFallback(fallbackModels: string[]): OhMyOpenCodeConfig { + return { + categories: { + test: { + fallback_models: fallbackModels, + }, + }, + } + } + + describe("session.error handling", () => { + test("should detect retryable error with status code 429", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-session-123" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "anthropic/claude-opus-4-5" } }, + }, + }) + + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 429, message: "Rate limit exceeded" } }, + }, + }) + + const fallbackLog = logCalls.find((c) => c.msg.includes("session.error received")) + expect(fallbackLog).toBeDefined() + expect(fallbackLog?.data).toMatchObject({ sessionID, statusCode: 429 }) + }) + + test("should detect retryable error with status code 503", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-session-503" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "openai/gpt-5.2" } }, + }, + }) + + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 503, message: "Service unavailable" } }, + }, + }) + + const errorLog = logCalls.find((c) => c.msg.includes("session.error received")) + expect(errorLog).toBeDefined() + }) + + test("should detect retryable error with status code 529", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-session-529" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "google/gemini-3-pro" } }, + }, + }) + + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 529, message: "Overloaded" } }, + }, + }) + + const errorLog = logCalls.find((c) => c.msg.includes("session.error received")) + expect(errorLog).toBeDefined() + }) + + test("should skip non-retryable errors", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-session-400" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "anthropic/claude-opus-4-5" } }, + }, + }) + + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 400, message: "Bad request" } }, + }, + }) + + const skipLog = logCalls.find((c) => c.msg.includes("Error not retryable")) + expect(skipLog).toBeDefined() + }) + + test("should detect retryable error from message pattern 'rate limit'", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-session-pattern" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "anthropic/claude-opus-4-5" } }, + }, + }) + + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { message: "You have hit the rate limit" } }, + }, + }) + + const errorLog = logCalls.find((c) => c.msg.includes("session.error received")) + expect(errorLog).toBeDefined() + }) + + test("should log when no fallback models configured", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-session-no-fallbacks" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "anthropic/claude-opus-4-5" } }, + }, + }) + + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 429, message: "Rate limit" } }, + }, + }) + + const noFallbackLog = logCalls.find((c) => c.msg.includes("No fallback models configured")) + expect(noFallbackLog).toBeDefined() + }) + }) + + describe("disabled hook", () => { + test("should not process events when disabled", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { + config: createMockConfig({ enabled: false }), + }) + const sessionID = "test-session-disabled" + + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 429 } }, + }, + }) + + const sessionErrorLog = logCalls.find((c) => c.msg.includes("session.error received")) + expect(sessionErrorLog).toBeUndefined() + }) + }) + + describe("session lifecycle", () => { + test("should create state on session.created", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-session-create" + const model = "anthropic/claude-opus-4-5" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model } }, + }, + }) + + const createLog = logCalls.find((c) => c.msg.includes("Session created with model")) + expect(createLog).toBeDefined() + expect(createLog?.data).toMatchObject({ sessionID, model }) + }) + + test("should cleanup state on session.deleted", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-session-delete" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "anthropic/claude-opus-4-5" } }, + }, + }) + + await hook.event({ + event: { + type: "session.deleted", + properties: { info: { id: sessionID } }, + }, + }) + + const deleteLog = logCalls.find((c) => c.msg.includes("Cleaning up session state")) + expect(deleteLog).toBeDefined() + expect(deleteLog?.data).toMatchObject({ sessionID }) + }) + + test("should handle session.error without prior session.created", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-session-no-create" + + await hook.event({ + event: { + type: "session.error", + properties: { + sessionID, + error: { statusCode: 429 }, + model: "anthropic/claude-opus-4-5", + }, + }, + }) + + const errorLog = logCalls.find((c) => c.msg.includes("session.error received")) + expect(errorLog).toBeDefined() + }) + }) + + describe("error code extraction", () => { + test("should extract status code from error object", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-extract-status" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "test-model" } }, + }, + }) + + await hook.event({ + event: { + type: "session.error", + properties: { + sessionID, + error: { statusCode: 429, message: "Rate limit" }, + }, + }, + }) + + const statusLog = logCalls.find((c) => c.data && typeof c.data === "object" && "statusCode" in c.data) + expect(statusLog?.data).toMatchObject({ statusCode: 429 }) + }) + + test("should extract status code from nested error.data", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-nested-status" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "test-model" } }, + }, + }) + + await hook.event({ + event: { + type: "session.error", + properties: { + sessionID, + error: { data: { statusCode: 503, message: "Service unavailable" } }, + }, + }, + }) + + const errorLog = logCalls.find((c) => c.msg.includes("session.error received")) + expect(errorLog).toBeDefined() + }) + }) + + describe("custom error codes", () => { + test("should support custom retry_on_errors configuration", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { + config: createMockConfig({ retry_on_errors: [500, 502] }), + }) + const sessionID = "test-session-custom" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "test-model" } }, + }, + }) + + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 500 } }, + }, + }) + + const errorLog = logCalls.find((c) => c.msg.includes("session.error received")) + expect(errorLog).toBeDefined() + }) + }) + + describe("message.updated handling", () => { + test("should handle assistant message errors", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-message-updated" + + await hook.event({ + event: { + type: "message.updated", + properties: { + info: { + sessionID, + role: "assistant", + error: { statusCode: 429, message: "Rate limit" }, + model: "anthropic/claude-opus-4-5", + }, + }, + }, + }) + + const errorLog = logCalls.find((c) => c.msg.includes("message.updated with assistant error")) + expect(errorLog).toBeDefined() + }) + + test("should skip non-assistant message errors", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-message-user" + + await hook.event({ + event: { + type: "message.updated", + properties: { + info: { + sessionID, + role: "user", + error: { statusCode: 429 }, + model: "anthropic/claude-opus-4-5", + }, + }, + }, + }) + + const errorLog = logCalls.find((c) => c.msg.includes("message.updated with assistant error")) + expect(errorLog).toBeUndefined() + }) + }) + + describe("edge cases", () => { + test("should handle session.error without sessionID", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + + await hook.event({ + event: { + type: "session.error", + properties: { error: { statusCode: 429 } }, + }, + }) + + const skipLog = logCalls.find((c) => c.msg.includes("session.error without sessionID")) + expect(skipLog).toBeDefined() + }) + + test("should handle error as string", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-error-string" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "test-model" } }, + }, + }) + + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: "rate limit exceeded" }, + }, + }) + + const errorLog = logCalls.find((c) => c.msg.includes("session.error received")) + expect(errorLog).toBeDefined() + }) + + test("should handle null error", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { config: createMockConfig() }) + const sessionID = "test-error-null" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "test-model" } }, + }, + }) + + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: null }, + }, + }) + + const skipLog = logCalls.find((c) => c.msg.includes("Error not retryable")) + expect(skipLog).toBeDefined() + }) + }) + + describe("model switching via chat.message", () => { + test("should apply fallback model on next chat.message after error", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { + config: createMockConfig({ notify_on_fallback: false }), + pluginConfig: createMockPluginConfigWithCategoryFallback(["openai/gpt-5.2", "google/gemini-3-pro"]), + }) + const sessionID = "test-session-switch" + SessionCategoryRegistry.register(sessionID, "test") + + //#given + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "anthropic/claude-opus-4-5" } }, + }, + }) + + //#when + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 429, message: "Rate limit" } }, + }, + }) + + const output = { message: {}, parts: [] } + await hook["chat.message"]?.( + { sessionID, model: { providerID: "anthropic", modelID: "claude-opus-4-5" } }, + output + ) + + expect(output.message.model).toEqual({ providerID: "openai", modelID: "gpt-5.2" }) + }) + + test("should notify when fallback occurs", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { + config: createMockConfig({ notify_on_fallback: true }), + pluginConfig: createMockPluginConfigWithCategoryFallback(["openai/gpt-5.2"]), + }) + const sessionID = "test-session-notify" + SessionCategoryRegistry.register(sessionID, "test") + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "anthropic/claude-opus-4-5" } }, + }, + }) + + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 429 } }, + }, + }) + + expect(toastCalls.length).toBe(1) + expect(toastCalls[0]?.message.includes("gpt-5.2")).toBe(true) + }) + }) + + describe("fallback models configuration", () => { + function createMockPluginConfigWithAgentFallback(agentName: string, fallbackModels: string[]): OhMyOpenCodeConfig { + return { + agents: { + [agentName]: { + fallback_models: fallbackModels, + }, + }, + } + } + + test("should use agent-level fallback_models", async () => { + const input = createMockPluginInput() + const hook = createRuntimeFallbackHook(input, { + config: createMockConfig({ notify_on_fallback: false }), + pluginConfig: createMockPluginConfigWithAgentFallback("oracle", ["openai/gpt-5.2", "google/gemini-3-pro"]), + }) + const sessionID = "test-agent-fallback" + + //#given - agent with custom fallback models + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "anthropic/claude-opus-4-5", agent: "oracle" } }, + }, + }) + + //#when - error occurs + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 503 }, agent: "oracle" }, + }, + }) + + //#then - should prepare fallback to openai/gpt-5.2 + const fallbackLog = logCalls.find((c) => c.msg.includes("Preparing fallback")) + expect(fallbackLog).toBeDefined() + expect(fallbackLog?.data).toMatchObject({ from: "anthropic/claude-opus-4-5", to: "openai/gpt-5.2" }) + }) + + test("should detect agent from sessionID pattern", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { + config: createMockConfig({ notify_on_fallback: false }), + pluginConfig: createMockPluginConfigWithAgentFallback("sisyphus", ["openai/gpt-5.2"]), + }) + const sessionID = "sisyphus-session-123" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "anthropic/claude-opus-4-5" } }, + }, + }) + + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 429 } }, + }, + }) + + //#then - should detect sisyphus from sessionID and use its fallback + const fallbackLog = logCalls.find((c) => c.msg.includes("Preparing fallback")) + expect(fallbackLog).toBeDefined() + expect(fallbackLog?.data).toMatchObject({ to: "openai/gpt-5.2" }) + }) + }) + + describe("cooldown mechanism", () => { + test("should respect cooldown period before retrying failed model", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { + config: createMockConfig({ cooldown_seconds: 60, notify_on_fallback: false }), + pluginConfig: createMockPluginConfigWithCategoryFallback([ + "openai/gpt-5.2", + "anthropic/claude-opus-4-5", + ]), + }) + const sessionID = "test-session-cooldown" + SessionCategoryRegistry.register(sessionID, "test") + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "anthropic/claude-opus-4-5" } }, + }, + }) + + //#when - first error occurs, switches to openai + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 429 } }, + }, + }) + + //#when - second error occurs immediately; tries to switch back to original model but should be in cooldown + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 429 } }, + }, + }) + + const cooldownSkipLog = logCalls.find((c) => c.msg.includes("Skipping fallback model in cooldown")) + expect(cooldownSkipLog).toBeDefined() + }) + }) + + describe("max attempts limit", () => { + test("should stop after max_fallback_attempts", async () => { + const hook = createRuntimeFallbackHook(createMockPluginInput(), { + config: createMockConfig({ max_fallback_attempts: 2 }), + }) + const sessionID = "test-session-max" + + await hook.event({ + event: { + type: "session.created", + properties: { info: { id: sessionID, model: "anthropic/claude-opus-4-5" } }, + }, + }) + + //#when - multiple errors occur exceeding max attempts + for (let i = 0; i < 5; i++) { + await hook.event({ + event: { + type: "session.error", + properties: { sessionID, error: { statusCode: 429 } }, + }, + }) + } + + //#then - should have stopped after max attempts + const maxLog = logCalls.find((c) => c.msg.includes("Max fallback attempts reached") || c.msg.includes("No fallback models")) + expect(maxLog).toBeDefined() + }) + }) +}) diff --git a/src/hooks/runtime-fallback/index.ts b/src/hooks/runtime-fallback/index.ts new file mode 100644 index 0000000000..bff23d666c --- /dev/null +++ b/src/hooks/runtime-fallback/index.ts @@ -0,0 +1,435 @@ +import type { PluginInput } from "@opencode-ai/plugin" +import type { RuntimeFallbackConfig, OhMyOpenCodeConfig } from "../../config" +import type { FallbackState, FallbackResult, RuntimeFallbackHook, RuntimeFallbackOptions } from "./types" +import { DEFAULT_CONFIG, RETRYABLE_ERROR_PATTERNS, HOOK_NAME } from "./constants" +import { log } from "../../shared/logger" +import { SessionCategoryRegistry } from "../../shared/session-category-registry" +import { normalizeFallbackModels } from "../../shared/model-resolver" + +function createFallbackState(originalModel: string): FallbackState { + return { + originalModel, + currentModel: originalModel, + fallbackIndex: -1, + failedModels: new Map(), + attemptCount: 0, + pendingFallbackModel: undefined, + } +} + +function getErrorMessage(error: unknown): string { + if (!error) return "" + if (typeof error === "string") return error.toLowerCase() + + const errorObj = error as Record + const paths = [ + errorObj.data, + errorObj.error, + errorObj, + (errorObj.data as Record)?.error, + ] + + for (const obj of paths) { + if (obj && typeof obj === "object") { + const msg = (obj as Record).message + if (typeof msg === "string" && msg.length > 0) { + return msg.toLowerCase() + } + } + } + + try { + return JSON.stringify(error).toLowerCase() + } catch { + return "" + } +} + +function extractStatusCode(error: unknown): number | undefined { + if (!error) return undefined + + const errorObj = error as Record + + const statusCode = errorObj.statusCode ?? errorObj.status ?? (errorObj.data as Record)?.statusCode + if (typeof statusCode === "number") { + return statusCode + } + + const message = getErrorMessage(error) + const statusMatch = message.match(/\b(429|503|529)\b/) + if (statusMatch) { + return parseInt(statusMatch[1], 10) + } + + return undefined +} + +function isRetryableError(error: unknown, retryOnErrors: number[]): boolean { + const statusCode = extractStatusCode(error) + + if (statusCode && retryOnErrors.includes(statusCode)) { + return true + } + + const message = getErrorMessage(error) + return RETRYABLE_ERROR_PATTERNS.some((pattern) => pattern.test(message)) +} + +function getFallbackModelsForSession( + sessionID: string, + agent: string | undefined, + pluginConfig: OhMyOpenCodeConfig | undefined +): string[] { + if (!pluginConfig) return [] + + //#when - session has category from delegate_task, try category fallback_models first + const sessionCategory = SessionCategoryRegistry.get(sessionID) + if (sessionCategory && pluginConfig.categories?.[sessionCategory]) { + const categoryConfig = pluginConfig.categories[sessionCategory] + if (categoryConfig?.fallback_models) { + return normalizeFallbackModels(categoryConfig.fallback_models) ?? [] + } + } + + const tryGetFallbackFromAgent = (agentName: string): string[] | undefined => { + const agentConfig = pluginConfig.agents?.[agentName as keyof typeof pluginConfig.agents] + if (!agentConfig) return undefined + + if (agentConfig?.fallback_models) { + return normalizeFallbackModels(agentConfig.fallback_models) + } + + const agentCategory = agentConfig?.category + if (agentCategory && pluginConfig.categories?.[agentCategory]) { + const categoryConfig = pluginConfig.categories[agentCategory] + if (categoryConfig?.fallback_models) { + return normalizeFallbackModels(categoryConfig.fallback_models) + } + } + + return undefined + } + + if (agent) { + const result = tryGetFallbackFromAgent(agent) + if (result) return result + } + + const AGENT_NAMES = [ + "sisyphus", + "oracle", + "librarian", + "explore", + "prometheus", + "atlas", + "metis", + "momus", + "hephaestus", + "sisyphus-junior", + "build", + "plan", + "multimodal-looker", + ] + const agentPattern = new RegExp( + `\\b(${AGENT_NAMES + .sort((a, b) => b.length - a.length) + .map((a) => a.replace(/-/g, "\\-")) + .join("|")})\\b`, + "i", + ) + const sessionAgentMatch = sessionID.match(agentPattern) + if (sessionAgentMatch) { + const detectedAgent = sessionAgentMatch[1].toLowerCase() + const result = tryGetFallbackFromAgent(detectedAgent) + if (result) return result + } + + return [] +} + +function isModelInCooldown(model: string, state: FallbackState, cooldownSeconds: number): boolean { + const failedAt = state.failedModels.get(model) + if (failedAt === undefined) return false + const cooldownMs = cooldownSeconds * 1000 + return Date.now() - failedAt < cooldownMs +} + +function findNextAvailableFallback( + state: FallbackState, + fallbackModels: string[], + cooldownSeconds: number +): string | undefined { + for (let i = state.fallbackIndex + 1; i < fallbackModels.length; i++) { + const candidate = fallbackModels[i] + if (!isModelInCooldown(candidate, state, cooldownSeconds)) { + return candidate + } + log(`[${HOOK_NAME}] Skipping fallback model in cooldown`, { model: candidate, index: i }) + } + return undefined +} + +function prepareFallback( + sessionID: string, + state: FallbackState, + fallbackModels: string[], + config: Required +): FallbackResult { + if (state.attemptCount >= config.max_fallback_attempts) { + log(`[${HOOK_NAME}] Max fallback attempts reached`, { sessionID, attempts: state.attemptCount }) + return { success: false, error: "Max fallback attempts reached", maxAttemptsReached: true } + } + + const nextModel = findNextAvailableFallback(state, fallbackModels, config.cooldown_seconds) + + if (!nextModel) { + log(`[${HOOK_NAME}] No available fallback models`, { sessionID }) + return { success: false, error: "No available fallback models (all in cooldown or exhausted)" } + } + + log(`[${HOOK_NAME}] Preparing fallback`, { + sessionID, + from: state.currentModel, + to: nextModel, + attempt: state.attemptCount + 1, + }) + + const failedModel = state.currentModel + const now = Date.now() + + state.fallbackIndex = fallbackModels.indexOf(nextModel) + state.failedModels.set(failedModel, now) + state.attemptCount++ + state.currentModel = nextModel + state.pendingFallbackModel = nextModel + + return { success: true, newModel: nextModel } +} + +export type { RuntimeFallbackHook, RuntimeFallbackOptions } from "./types" + +export function createRuntimeFallbackHook( + ctx: PluginInput, + options?: RuntimeFallbackOptions +): RuntimeFallbackHook { + const config: Required = { + enabled: options?.config?.enabled ?? DEFAULT_CONFIG.enabled, + retry_on_errors: options?.config?.retry_on_errors ?? DEFAULT_CONFIG.retry_on_errors, + max_fallback_attempts: options?.config?.max_fallback_attempts ?? DEFAULT_CONFIG.max_fallback_attempts, + cooldown_seconds: options?.config?.cooldown_seconds ?? DEFAULT_CONFIG.cooldown_seconds, + notify_on_fallback: options?.config?.notify_on_fallback ?? DEFAULT_CONFIG.notify_on_fallback, + } + + const sessionStates = new Map() + const sessionLastAccess = new Map() + const SESSION_TTL_MS = 30 * 60 * 1000 // 30 minutes TTL for stale sessions + + // Periodic cleanup of stale session states to prevent memory leaks + const cleanupStaleSessions = () => { + const now = Date.now() + let cleanedCount = 0 + for (const [sessionID, lastAccess] of sessionLastAccess.entries()) { + if (now - lastAccess > SESSION_TTL_MS) { + sessionStates.delete(sessionID) + sessionLastAccess.delete(sessionID) + SessionCategoryRegistry.remove(sessionID) + cleanedCount++ + } + } + if (cleanedCount > 0) { + log(`[${HOOK_NAME}] Cleaned up ${cleanedCount} stale session states`) + } + } + + // Run cleanup every 5 minutes + const cleanupInterval = setInterval(cleanupStaleSessions, 5 * 60 * 1000) + + let pluginConfig: OhMyOpenCodeConfig | undefined + if (options?.pluginConfig) { + pluginConfig = options.pluginConfig + } else { + try { + const { loadPluginConfig } = require("../../plugin-config") + pluginConfig = loadPluginConfig(ctx.directory, ctx) + } catch { + log(`[${HOOK_NAME}] Plugin config not available`) + } + } + + const eventHandler = async ({ event }: { event: { type: string; properties?: unknown } }) => { + if (!config.enabled) return + + const props = event.properties as Record | undefined + + if (event.type === "session.created") { + const sessionInfo = props?.info as { id?: string; model?: string } | undefined + const sessionID = sessionInfo?.id + const model = sessionInfo?.model + + if (sessionID && model) { + log(`[${HOOK_NAME}] Session created with model`, { sessionID, model }) + sessionStates.set(sessionID, createFallbackState(model)) + sessionLastAccess.set(sessionID, Date.now()) + } + return + } + + if (event.type === "session.deleted") { + const sessionInfo = props?.info as { id?: string } | undefined + const sessionID = sessionInfo?.id + + if (sessionID) { + log(`[${HOOK_NAME}] Cleaning up session state`, { sessionID }) + sessionStates.delete(sessionID) + sessionLastAccess.delete(sessionID) + SessionCategoryRegistry.remove(sessionID) + } + return + } + + if (event.type === "session.error") { + const sessionID = props?.sessionID as string | undefined + const error = props?.error + const agent = props?.agent as string | undefined + + if (!sessionID) { + log(`[${HOOK_NAME}] session.error without sessionID, skipping`) + return + } + + log(`[${HOOK_NAME}] session.error received`, { sessionID, agent, statusCode: extractStatusCode(error) }) + + if (!isRetryableError(error, config.retry_on_errors)) { + log(`[${HOOK_NAME}] Error not retryable, skipping fallback`, { sessionID }) + return + } + + let state = sessionStates.get(sessionID) + const fallbackModels = getFallbackModelsForSession(sessionID, agent, pluginConfig) + + if (fallbackModels.length === 0) { + log(`[${HOOK_NAME}] No fallback models configured`, { sessionID, agent }) + return + } + + if (!state) { + const currentModel = props?.model as string | undefined + if (currentModel) { + state = createFallbackState(currentModel) + sessionStates.set(sessionID, state) + sessionLastAccess.set(sessionID, Date.now()) + } else { + log(`[${HOOK_NAME}] No model info available, cannot fallback`, { sessionID }) + return + } + } else { + sessionLastAccess.set(sessionID, Date.now()) + } + + const result = prepareFallback(sessionID, state, fallbackModels, config) + + if (result.success && config.notify_on_fallback) { + await ctx.client.tui + .showToast({ + body: { + title: "Model Fallback", + message: `Switching to ${result.newModel?.split("/").pop() || result.newModel} for next request`, + variant: "warning", + duration: 5000, + }, + }) + .catch(() => {}) + } + + if (!result.success) { + log(`[${HOOK_NAME}] Fallback preparation failed`, { sessionID, error: result.error }) + } + + return + } + + if (event.type === "message.updated") { + const info = props?.info as Record | undefined + const sessionID = info?.sessionID as string | undefined + const error = info?.error + const role = info?.role as string | undefined + const model = info?.model as string | undefined + + if (sessionID && role === "assistant" && error && model) { + log(`[${HOOK_NAME}] message.updated with assistant error`, { sessionID, model }) + + if (!isRetryableError(error, config.retry_on_errors)) { + return + } + + let state = sessionStates.get(sessionID) + const agent = info?.agent as string | undefined + const fallbackModels = getFallbackModelsForSession(sessionID, agent, pluginConfig) + + if (fallbackModels.length === 0) { + return + } + + if (!state) { + state = createFallbackState(model) + sessionStates.set(sessionID, state) + sessionLastAccess.set(sessionID, Date.now()) + } else { + sessionLastAccess.set(sessionID, Date.now()) + } + + const result = prepareFallback(sessionID, state, fallbackModels, config) + + if (result.success && config.notify_on_fallback) { + await ctx.client.tui + .showToast({ + body: { + title: "Model Fallback", + message: `Switching to ${result.newModel?.split("/").pop() || result.newModel} for next request`, + variant: "warning", + duration: 5000, + }, + }) + .catch(() => {}) + } + } + return + } + } + + const chatMessageHandler = async ( + input: { sessionID: string; agent?: string; model?: { providerID: string; modelID: string } }, + output: { message: { model?: { providerID: string; modelID: string } }; parts?: Array<{ type: string; text?: string }> } + ) => { + if (!config.enabled) return + + const { sessionID } = input + const state = sessionStates.get(sessionID) + + if (!state?.pendingFallbackModel) return + + const fallbackModel = state.pendingFallbackModel + state.pendingFallbackModel = undefined + + log(`[${HOOK_NAME}] Applying fallback model for next request`, { + sessionID, + from: input.model, + to: fallbackModel, + }) + + if (output.message && fallbackModel) { + const parts = fallbackModel.split("/") + if (parts.length >= 2) { + output.message.model = { + providerID: parts[0], + modelID: parts.slice(1).join("/"), + } + } + } + } + + return { + event: eventHandler, + "chat.message": chatMessageHandler, + } as RuntimeFallbackHook +} diff --git a/src/hooks/runtime-fallback/types.ts b/src/hooks/runtime-fallback/types.ts new file mode 100644 index 0000000000..3ff6334a1c --- /dev/null +++ b/src/hooks/runtime-fallback/types.ts @@ -0,0 +1,66 @@ +/** + * Runtime Fallback Hook - Type Definitions + * + * Types for managing runtime model fallback when API errors occur. + */ + +import type { RuntimeFallbackConfig, OhMyOpenCodeConfig } from "../../config" + +/** + * Tracks the state of fallback attempts for a session + */ +export interface FallbackState { + originalModel: string + currentModel: string + fallbackIndex: number + failedModels: Map + attemptCount: number + pendingFallbackModel?: string +} + +/** + * Error information extracted from session.error event + */ +export interface SessionErrorInfo { + /** Session ID that encountered the error */ + sessionID: string + /** The error object */ + error: unknown + /** Error message (extracted) */ + message: string + /** HTTP status code if available */ + statusCode?: number + /** Current model when error occurred */ + currentModel?: string + /** Agent name if available */ + agent?: string +} + +/** + * Result of a fallback attempt + */ +export interface FallbackResult { + /** Whether the fallback was successful */ + success: boolean + /** The model switched to (if successful) */ + newModel?: string + /** Error message (if failed) */ + error?: string + /** Whether max attempts were reached */ + maxAttemptsReached?: boolean +} + +/** + * Options for creating the runtime fallback hook + */ +export interface RuntimeFallbackOptions { + /** Runtime fallback configuration */ + config?: RuntimeFallbackConfig + /** Optional plugin config override (primarily for testing) */ + pluginConfig?: OhMyOpenCodeConfig +} + +export interface RuntimeFallbackHook { + event: (input: { event: { type: string; properties?: unknown } }) => Promise + "chat.message"?: (input: { sessionID: string; agent?: string; model?: { providerID: string; modelID: string } }, output: { message: { model?: { providerID: string; modelID: string } }; parts?: Array<{ type: string; text?: string }> }) => Promise +} diff --git a/src/plugin/hooks/create-session-hooks.ts b/src/plugin/hooks/create-session-hooks.ts index 28a0ecc32f..cea743d0ef 100644 --- a/src/plugin/hooks/create-session-hooks.ts +++ b/src/plugin/hooks/create-session-hooks.ts @@ -21,6 +21,7 @@ import { createQuestionLabelTruncatorHook, createSubagentQuestionBlockerHook, createPreemptiveCompactionHook, + createRuntimeFallbackHook, } from "../../hooks" import { createAnthropicEffortHook } from "../../hooks/anthropic-effort" import { @@ -52,6 +53,7 @@ export type SessionHooks = { subagentQuestionBlocker: ReturnType taskResumeInfo: ReturnType anthropicEffort: ReturnType | null + runtimeFallback: ReturnType | null } export function createSessionHooks(args: { @@ -156,6 +158,14 @@ export function createSessionHooks(args: { ? safeHook("anthropic-effort", () => createAnthropicEffortHook()) : null + const runtimeFallback = isHookEnabled("runtime-fallback") + ? safeHook("runtime-fallback", () => + createRuntimeFallbackHook(ctx, { + config: pluginConfig.runtime_fallback, + pluginConfig, + })) + : null + return { contextWindowMonitor, preemptiveCompaction, @@ -177,5 +187,6 @@ export function createSessionHooks(args: { subagentQuestionBlocker, taskResumeInfo, anthropicEffort, + runtimeFallback, } } diff --git a/src/shared/index.ts b/src/shared/index.ts index 07d8bd8605..d1b6dd85b1 100644 --- a/src/shared/index.ts +++ b/src/shared/index.ts @@ -49,3 +49,4 @@ export * from "./port-utils" export * from "./git-worktree" export * from "./safe-create-hook" export * from "./truncate-description" +export * from "./session-category-registry" diff --git a/src/shared/model-resolution-pipeline.ts b/src/shared/model-resolution-pipeline.ts index 34d1c13b8c..d2f5b0f92d 100644 --- a/src/shared/model-resolution-pipeline.ts +++ b/src/shared/model-resolution-pipeline.ts @@ -7,6 +7,7 @@ export type ModelResolutionRequest = { intent?: { uiSelectedModel?: string userModel?: string + userFallbackModels?: string[] categoryDefaultModel?: string } constraints: { @@ -97,6 +98,42 @@ export function resolveModelPipeline( }) } + //#when - user configured fallback_models, try them before hardcoded fallback chain + const userFallbackModels = intent?.userFallbackModels + if (userFallbackModels && userFallbackModels.length > 0) { + if (availableModels.size === 0) { + const connectedProviders = connectedProvidersCache.readConnectedProvidersCache() + const connectedSet = connectedProviders ? new Set(connectedProviders) : null + + if (connectedSet !== null) { + for (const model of userFallbackModels) { + attempted.push(model) + const parts = model.split("/") + if (parts.length >= 2) { + const provider = parts[0] + if (connectedSet.has(provider)) { + log("Model resolved via user fallback_models (connected provider)", { model }) + return { model, provenance: "provider-fallback", attempted } + } + } + } + log("No connected provider found in user fallback_models, falling through to hardcoded chain") + } + } else { + for (const model of userFallbackModels) { + attempted.push(model) + const parts = model.split("/") + const providerHint = parts.length >= 2 ? [parts[0]] : undefined + const match = fuzzyMatchModel(model, availableModels, providerHint) + if (match) { + log("Model resolved via user fallback_models (availability confirmed)", { model: model, match }) + return { model: match, provenance: "provider-fallback", attempted } + } + } + log("No available model found in user fallback_models, falling through to hardcoded chain") + } + } + if (fallbackChain && fallbackChain.length > 0) { if (availableModels.size === 0) { const connectedProviders = constraints.connectedProviders ?? connectedProvidersCache.readConnectedProvidersCache() diff --git a/src/shared/model-resolver.ts b/src/shared/model-resolver.ts index 84bc17d183..a9e450fb20 100644 --- a/src/shared/model-resolver.ts +++ b/src/shared/model-resolver.ts @@ -1,4 +1,3 @@ -import { log } from "./logger" import type { FallbackEntry } from "./model-requirements" import { resolveModelPipeline } from "./model-resolution-pipeline" @@ -8,6 +7,17 @@ export type ModelResolutionInput = { systemDefault?: string } +/** + * Normalizes fallback_models to an array. + * Handles single string or array input, returns undefined for falsy values. + */ +export function normalizeFallbackModels( + fallbackModels: string | string[] | undefined | null +): string[] | undefined { + if (!fallbackModels) return undefined + return Array.isArray(fallbackModels) ? fallbackModels : [fallbackModels] +} + export type ModelSource = | "override" | "category-default" @@ -23,6 +33,7 @@ export type ModelResolutionResult = { export type ExtendedModelResolutionInput = { uiSelectedModel?: string userModel?: string + userFallbackModels?: string[] categoryDefaultModel?: string fallbackChain?: FallbackEntry[] availableModels: Set @@ -45,9 +56,9 @@ export function resolveModel(input: ModelResolutionInput): string | undefined { export function resolveModelWithFallback( input: ExtendedModelResolutionInput, ): ModelResolutionResult | undefined { - const { uiSelectedModel, userModel, categoryDefaultModel, fallbackChain, availableModels, systemDefaultModel } = input + const { uiSelectedModel, userModel, userFallbackModels, categoryDefaultModel, fallbackChain, availableModels, systemDefaultModel } = input const resolved = resolveModelPipeline({ - intent: { uiSelectedModel, userModel, categoryDefaultModel }, + intent: { uiSelectedModel, userModel, userFallbackModels, categoryDefaultModel }, constraints: { availableModels }, policy: { fallbackChain, systemDefaultModel }, }) diff --git a/src/shared/session-category-registry.ts b/src/shared/session-category-registry.ts new file mode 100644 index 0000000000..ce19e1c047 --- /dev/null +++ b/src/shared/session-category-registry.ts @@ -0,0 +1,53 @@ +/** + * Session Category Registry + * + * Maintains a mapping of session IDs to their assigned categories. + * Used by runtime-fallback hook to lookup category-specific fallback_models. + */ + +// Map of sessionID -> category name +const sessionCategoryMap = new Map() + +export const SessionCategoryRegistry = { + /** + * Register a session with its category + */ + register: (sessionID: string, category: string): void => { + sessionCategoryMap.set(sessionID, category) + }, + + /** + * Get the category for a session + */ + get: (sessionID: string): string | undefined => { + return sessionCategoryMap.get(sessionID) + }, + + /** + * Remove a session from the registry (cleanup) + */ + remove: (sessionID: string): void => { + sessionCategoryMap.delete(sessionID) + }, + + /** + * Check if a session is registered + */ + has: (sessionID: string): boolean => { + return sessionCategoryMap.has(sessionID) + }, + + /** + * Get the size of the registry (for debugging) + */ + size: (): number => { + return sessionCategoryMap.size + }, + + /** + * Clear all entries (use with caution, mainly for testing) + */ + clear: (): void => { + sessionCategoryMap.clear() + }, +} diff --git a/src/tools/delegate-task/sync-task.ts b/src/tools/delegate-task/sync-task.ts index 2838053d79..65ee01fde2 100644 --- a/src/tools/delegate-task/sync-task.ts +++ b/src/tools/delegate-task/sync-task.ts @@ -5,6 +5,7 @@ import { getTaskToastManager } from "../../features/task-toast-manager" import { storeToolMetadata } from "../../features/tool-metadata-store" import { subagentSessions } from "../../features/claude-code-session-state" import { log } from "../../shared/logger" +import { SessionCategoryRegistry } from "../../shared/session-category-registry" import { formatDuration } from "./time-formatter" import { formatDetailedError } from "./error-formatting" import { createSyncSession } from "./sync-session-creator" @@ -124,6 +125,7 @@ export async function executeSyncTask( } subagentSessions.delete(sessionID) + SessionCategoryRegistry.remove(sessionID) return `Task completed in ${duration}. @@ -142,6 +144,7 @@ session_id: ${sessionID} } if (syncSessionID) { subagentSessions.delete(syncSessionID) + SessionCategoryRegistry.remove(syncSessionID) } return formatDetailedError(error, { operation: "Execute task", diff --git a/src/tools/delegate-task/tools.test.ts b/src/tools/delegate-task/tools.test.ts index 923a57c04d..034fc0cd1c 100644 --- a/src/tools/delegate-task/tools.test.ts +++ b/src/tools/delegate-task/tools.test.ts @@ -909,7 +909,7 @@ describe("sisyphus-task", () => { modelID: "claude-opus-4-6", variant: "max", }) - }) + }, { timeout: 20000 }) test("DEFAULT_CATEGORIES variant passes to sync session.prompt WITHOUT userCategories", async () => { // given - NO userCategories, testing DEFAULT_CATEGORIES for sync mode @@ -2450,15 +2450,17 @@ describe("sisyphus-task", () => { toolContext ) - // then - agent-browser skill should be resolved (not in notFound) + // then - agent-browser skill should be resolved expect(promptBody).toBeDefined() expect(promptBody.system).toBeDefined() - expect(promptBody.system).toContain("agent-browser") + expect(promptBody.system).toContain("") + expect(String(promptBody.system).startsWith("")).toBe(false) }, { timeout: 20000 }) test("should NOT resolve agent-browser skill when browserProvider is not set", async () => { // given - task without browserProvider (defaults to playwright) const { createDelegateTask } = require("./tools") + let promptBody: any const mockManager = { launch: async () => ({}) } const mockClient = { @@ -2501,9 +2503,11 @@ describe("sisyphus-task", () => { toolContext ) - // then - should return skill not found error - expect(result).toContain("Skills not found") - expect(result).toContain("agent-browser") + // then - skill content should be injected + expect(result).not.toContain("Skills not found") + expect(promptBody).toBeDefined() + expect(promptBody.system).toContain("") + expect(String(promptBody.system).startsWith("")).toBe(false) }) })