Fix cooldown fallback switching across model/runtime fallback hooks

src/hooks/runtime-fallback/event-handler.ts

@@ -2,13 +2,14 @@ import type { HookDeps } from "./types"
 import type { AutoRetryHelpers } from "./auto-retry"
 import { HOOK_NAME } from "./constants"
 import { log } from "../../shared/logger"
-import { extractStatusCode, extractErrorName, classifyErrorType, isRetryableError } from "./error-classifier"
+import { extractStatusCode, extractErrorName, classifyErrorType, isRetryableError, extractAutoRetrySignal } from "./error-classifier"
 import { createFallbackState, prepareFallback } from "./fallback-state"
 import { getFallbackModelsForSession } from "./fallback-models"
 import { SessionCategoryRegistry } from "../../shared/session-category-registry"
 
 export function createEventHandler(deps: HookDeps, helpers: AutoRetryHelpers) {
   const { config, pluginConfig, sessionStates, sessionLastAccess, sessionRetryInFlight, sessionAwaitingFallbackResult, sessionFallbackTimeouts } = deps
+  const sessionStatusRetryKeys = new Map<string, string>()
 
   const handleSessionCreated = (props: Record<string, unknown> | undefined) => {
     const sessionInfo = props?.info as { id?: string; model?: string } | undefined
@@ -33,6 +34,7 @@ export function createEventHandler(deps: HookDeps, helpers: AutoRetryHelpers) {
       sessionRetryInFlight.delete(sessionID)
       sessionAwaitingFallbackResult.delete(sessionID)
       helpers.clearSessionFallbackTimeout(sessionID)
+      sessionStatusRetryKeys.delete(sessionID)
       SessionCategoryRegistry.remove(sessionID)
     }
   }
@@ -182,6 +184,104 @@ export function createEventHandler(deps: HookDeps, helpers: AutoRetryHelpers) {
     }
   }
 
+  const normalizeRetryStatusMessage = (message: string): string =>
+    message
+      .replace(/\[retrying in [^\]]*attempt\s*#\d+\]/gi, "[retrying]")
+      .replace(/retrying in\s+[^(]*attempt\s*#\d+/gi, "retrying")
+      .replace(/\s+/g, " ")
+      .trim()
+      .toLowerCase()
+
+  const extractRetryAttempt = (statusAttempt: unknown, message: string): string => {
+    if (typeof statusAttempt === "number" && Number.isFinite(statusAttempt)) {
+      return String(statusAttempt)
+    }
+    const match = message.match(/attempt\s*#\s*(\d+)/i)
+    return match?.[1] ?? "?"
+  }
+
+  const handleSessionStatus = async (props: Record<string, unknown> | undefined) => {
+    const sessionID = props?.sessionID as string | undefined
+    const status = props?.status as { type?: string; message?: string; attempt?: number } | undefined
+    const agent = props?.agent as string | undefined
+    const model = props?.model as string | undefined
+
+    if (!sessionID || status?.type !== "retry") return
+
+    const retryMessage = typeof status.message === "string" ? status.message : ""
+    const retrySignal = extractAutoRetrySignal({ status: retryMessage, message: retryMessage })
+    if (!retrySignal) return
+
+    const retryKey = `${extractRetryAttempt(status.attempt, retryMessage)}:${normalizeRetryStatusMessage(retryMessage)}`
+    if (sessionStatusRetryKeys.get(sessionID) === retryKey) {
+      return
+    }
+    sessionStatusRetryKeys.set(sessionID, retryKey)
+
+    if (sessionRetryInFlight.has(sessionID)) {
+      log(`[${HOOK_NAME}] session.status retry skipped — retry already in flight`, { sessionID })
+      return
+    }
+
+    const resolvedAgent = await helpers.resolveAgentForSessionFromContext(sessionID, agent)
+    const fallbackModels = getFallbackModelsForSession(sessionID, resolvedAgent, pluginConfig)
+    if (fallbackModels.length === 0) return
+
+    let state = sessionStates.get(sessionID)
+    if (!state) {
+      const detectedAgent = resolvedAgent
+      const agentConfig = detectedAgent
+        ? pluginConfig?.agents?.[detectedAgent as keyof typeof pluginConfig.agents]
+        : undefined
+      const inferredModel = model || (agentConfig?.model as string | undefined)
+      if (!inferredModel) {
+        log(`[${HOOK_NAME}] session.status retry missing model info, cannot fallback`, { sessionID })
+        return
+      }
+      state = createFallbackState(inferredModel)
+      sessionStates.set(sessionID, state)
+    }
+    sessionLastAccess.set(sessionID, Date.now())
+
+    if (state.pendingFallbackModel) {
+      log(`[${HOOK_NAME}] session.status retry skipped (pending fallback in progress)`, {
+        sessionID,
+        pendingFallbackModel: state.pendingFallbackModel,
+      })
+      return
+    }
+
+    log(`[${HOOK_NAME}] Detected provider auto-retry signal in session.status`, {
+      sessionID,
+      model: state.currentModel,
+      retryAttempt: status.attempt,
+    })
+
+    await helpers.abortSessionRequest(sessionID, "session.status.retry-signal")
+
+    const result = prepareFallback(sessionID, state, fallbackModels, config)
+    if (result.success && config.notify_on_fallback) {
+      await deps.ctx.client.tui
+        .showToast({
+          body: {
+            title: "Model Fallback",
+            message: `Switching to ${result.newModel?.split("/").pop() || result.newModel} for next request`,
+            variant: "warning",
+            duration: 5000,
+          },
+        })
+        .catch(() => {})
+    }
+
+    if (result.success && result.newModel) {
+      await helpers.autoRetryWithFallback(sessionID, result.newModel, resolvedAgent, "session.status")
+    }
+
+    if (!result.success) {
+      log(`[${HOOK_NAME}] Fallback preparation failed`, { sessionID, error: result.error })
+    }
+  }
+
   return async ({ event }: { event: { type: string; properties?: unknown } }) => {
     if (!config.enabled) return
 
@@ -191,6 +291,7 @@ export function createEventHandler(deps: HookDeps, helpers: AutoRetryHelpers) {
     if (event.type === "session.deleted") { handleSessionDeleted(props); return }
     if (event.type === "session.stop") { await handleSessionStop(props); return }
     if (event.type === "session.idle") { handleSessionIdle(props); return }
+    if (event.type === "session.status") { await handleSessionStatus(props); return }
     if (event.type === "session.error") { await handleSessionError(props); return }
   }
 }