feat(config): add experimental config for gating unstable features (#110)

* feat(anthropic-auto-compact): add aggressive truncation and empty message recovery

Add truncateUntilTargetTokens method, empty content recovery mechanism, and
emptyContentAttemptBySession tracking for robust message handling.

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

* feat(session-recovery): add auto-resume and recovery callbacks

Implement ResumeConfig, resumeSession() method, and callback support for
enhanced session recovery and resume functionality.

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

* feat(config): add experimental config schema for gating unstable features

This adds a new 'experimental' config field to the OhMyOpenCode schema that enables fine-grained control over unstable/experimental features:

- aggressive_truncation: Enables aggressive token truncation in anthropic-auto-compact hook for more aggressive token limit handling
- empty_message_recovery: Enables empty message recovery mechanism in anthropic-auto-compact hook for fixing truncation-induced empty message errors
- auto_resume: Enables automatic session resume after recovery in session-recovery hook for seamless recovery experience

The experimental config is optional and all experimental features are disabled by default, ensuring backward compatibility while allowing early adopters to opt-in to cutting-edge features.

🤖 Generated with assistance of [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/config/index.ts

@@ -6,6 +6,7 @@ export {
   AgentNameSchema,
   HookNameSchema,
   OmoAgentConfigSchema,
+  ExperimentalConfigSchema,
 } from "./schema"
 
 export type {
@@ -16,4 +17,5 @@ export type {
   AgentName,
   HookName,
   OmoAgentConfig,
+  ExperimentalConfig,
 } from "./schema"

src/config/schema.ts

@@ -106,6 +106,12 @@ export const OmoAgentConfigSchema = z.object({
   disabled: z.boolean().optional(),
 })
 
+export const ExperimentalConfigSchema = z.object({
+  aggressive_truncation: z.boolean().optional(),
+  empty_message_recovery: z.boolean().optional(),
+  auto_resume: z.boolean().optional(),
+})
+
 export const OhMyOpenCodeConfigSchema = z.object({
   $schema: z.string().optional(),
   disabled_mcps: z.array(McpNameSchema).optional(),
@@ -115,6 +121,7 @@ export const OhMyOpenCodeConfigSchema = z.object({
   claude_code: ClaudeCodeConfigSchema.optional(),
   google_auth: z.boolean().optional(),
   omo_agent: OmoAgentConfigSchema.optional(),
+  experimental: ExperimentalConfigSchema.optional(),
 })
 
 export type OhMyOpenCodeConfig = z.infer<typeof OhMyOpenCodeConfigSchema>
@@ -123,5 +130,6 @@ export type AgentOverrides = z.infer<typeof AgentOverridesSchema>
 export type AgentName = z.infer<typeof AgentNameSchema>
 export type HookName = z.infer<typeof HookNameSchema>
 export type OmoAgentConfig = z.infer<typeof OmoAgentConfigSchema>
+export type ExperimentalConfig = z.infer<typeof ExperimentalConfigSchema>
 
 export { McpNameSchema, type McpName } from "../mcp/types"

src/hooks/anthropic-auto-compact/executor.ts

@@ -1,6 +1,9 @@
 import type { AutoCompactState, FallbackState, RetryState, TruncateState } from "./types"
+import type { ExperimentalConfig } from "../../config"
 import { FALLBACK_CONFIG, RETRY_CONFIG, TRUNCATE_CONFIG } from "./types"
-import { findLargestToolResult, truncateToolResult } from "./storage"
+import { findLargestToolResult, truncateToolResult, truncateUntilTargetTokens } from "./storage"
+import { findEmptyMessages, injectTextPart } from "../session-recovery/storage"
+import { log } from "../../shared/logger"
 
 type Client = {
   session: {
@@ -151,24 +154,151 @@ function clearSessionState(autoCompactState: AutoCompactState, sessionID: string
   autoCompactState.retryStateBySession.delete(sessionID)
   autoCompactState.fallbackStateBySession.delete(sessionID)
   autoCompactState.truncateStateBySession.delete(sessionID)
+  autoCompactState.emptyContentAttemptBySession.delete(sessionID)
   autoCompactState.compactionInProgress.delete(sessionID)
 }
 
+function getOrCreateEmptyContentAttempt(
+  autoCompactState: AutoCompactState,
+  sessionID: string
+): number {
+  return autoCompactState.emptyContentAttemptBySession.get(sessionID) ?? 0
+}
+
+async function fixEmptyMessages(
+  sessionID: string,
+  autoCompactState: AutoCompactState,
+  client: Client
+): Promise<boolean> {
+  const attempt = getOrCreateEmptyContentAttempt(autoCompactState, sessionID)
+  autoCompactState.emptyContentAttemptBySession.set(sessionID, attempt + 1)
+
+  const emptyMessageIds = findEmptyMessages(sessionID)
+  if (emptyMessageIds.length === 0) {
+    await client.tui
+      .showToast({
+        body: {
+          title: "Empty Content Error",
+          message: "No empty messages found in storage. Cannot auto-recover.",
+          variant: "error",
+          duration: 5000,
+        },
+      })
+      .catch(() => {})
+    return false
+  }
+
+  let fixed = false
+  for (const messageID of emptyMessageIds) {
+    const success = injectTextPart(sessionID, messageID, "[user interrupted]")
+    if (success) fixed = true
+  }
+
+  if (fixed) {
+    await client.tui
+      .showToast({
+        body: {
+          title: "Session Recovery",
+          message: `Fixed ${emptyMessageIds.length} empty messages. Retrying...`,
+          variant: "warning",
+          duration: 3000,
+        },
+      })
+      .catch(() => {})
+  }
+
+  return fixed
+}
+
 export async function executeCompact(
   sessionID: string,
   msg: Record<string, unknown>,
   autoCompactState: AutoCompactState,
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
   client: any,
-  directory: string
+  directory: string,
+  experimental?: ExperimentalConfig
 ): Promise<void> {
   if (autoCompactState.compactionInProgress.has(sessionID)) {
     return
   }
   autoCompactState.compactionInProgress.add(sessionID)
 
+  const errorData = autoCompactState.errorDataBySession.get(sessionID)
   const truncateState = getOrCreateTruncateState(autoCompactState, sessionID)
 
+  if (
+    experimental?.aggressive_truncation &&
+    errorData?.currentTokens &&
+    errorData?.maxTokens &&
+    errorData.currentTokens > errorData.maxTokens &&
+    truncateState.truncateAttempt < TRUNCATE_CONFIG.maxTruncateAttempts
+  ) {
+    log("[auto-compact] aggressive truncation triggered (experimental)", {
+      currentTokens: errorData.currentTokens,
+      maxTokens: errorData.maxTokens,
+      targetRatio: TRUNCATE_CONFIG.targetTokenRatio,
+    })
+
+    const aggressiveResult = truncateUntilTargetTokens(
+      sessionID,
+      errorData.currentTokens,
+      errorData.maxTokens,
+      TRUNCATE_CONFIG.targetTokenRatio,
+      TRUNCATE_CONFIG.charsPerToken
+    )
+
+    if (aggressiveResult.truncatedCount > 0) {
+      truncateState.truncateAttempt += aggressiveResult.truncatedCount
+
+      const toolNames = aggressiveResult.truncatedTools.map((t) => t.toolName).join(", ")
+      const statusMsg = aggressiveResult.sufficient
+        ? `Truncated ${aggressiveResult.truncatedCount} outputs (${formatBytes(aggressiveResult.totalBytesRemoved)})`
+        : `Truncated ${aggressiveResult.truncatedCount} outputs (${formatBytes(aggressiveResult.totalBytesRemoved)}) but need ${formatBytes(aggressiveResult.targetBytesToRemove)}. Falling back to summarize/revert...`
+
+      await (client as Client).tui
+        .showToast({
+          body: {
+            title: aggressiveResult.sufficient ? "Aggressive Truncation" : "Partial Truncation",
+            message: `${statusMsg}: ${toolNames}`,
+            variant: "warning",
+            duration: 4000,
+          },
+        })
+        .catch(() => {})
+
+      log("[auto-compact] aggressive truncation completed", aggressiveResult)
+
+      if (aggressiveResult.sufficient) {
+        autoCompactState.compactionInProgress.delete(sessionID)
+
+        setTimeout(async () => {
+          try {
+            await (client as Client).session.prompt_async({
+              path: { sessionID },
+              body: { parts: [{ type: "text", text: "Continue" }] },
+              query: { directory },
+            })
+          } catch {}
+        }, 500)
+        return
+      }
+    } else {
+      await (client as Client).tui
+        .showToast({
+          body: {
+            title: "Truncation Skipped",
+            message: "No tool outputs found to truncate.",
+            variant: "warning",
+            duration: 3000,
+          },
+        })
+        .catch(() => {})
+    }
+  }
+
+  let skipSummarize = false
+
   if (truncateState.truncateAttempt < TRUNCATE_CONFIG.maxTruncateAttempts) {
     const largest = findLargestToolResult(sessionID)
 
@@ -203,12 +333,68 @@ export async function executeCompact(
         }, 500)
         return
       }
+    } else if (errorData?.currentTokens && errorData?.maxTokens && errorData.currentTokens > errorData.maxTokens) {
+      skipSummarize = true
+      await (client as Client).tui
+        .showToast({
+          body: {
+            title: "Summarize Skipped",
+            message: `Over token limit (${errorData.currentTokens}/${errorData.maxTokens}) with nothing to truncate. Going to revert...`,
+            variant: "warning",
+            duration: 3000,
+          },
+        })
+        .catch(() => {})
+    } else if (!errorData?.currentTokens) {
+      await (client as Client).tui
+        .showToast({
+          body: {
+            title: "Truncation Skipped",
+            message: "No large tool outputs found.",
+            variant: "warning",
+            duration: 3000,
+          },
+        })
+        .catch(() => {})
     }
   }
 
   const retryState = getOrCreateRetryState(autoCompactState, sessionID)
 
-  if (retryState.attempt < RETRY_CONFIG.maxAttempts) {
+  if (experimental?.empty_message_recovery && errorData?.errorType?.includes("non-empty content")) {
+    const attempt = getOrCreateEmptyContentAttempt(autoCompactState, sessionID)
+    if (attempt < 3) {
+      const fixed = await fixEmptyMessages(sessionID, autoCompactState, client as Client)
+      if (fixed) {
+        autoCompactState.compactionInProgress.delete(sessionID)
+        setTimeout(() => {
+          executeCompact(sessionID, msg, autoCompactState, client, directory, experimental)
+        }, 500)
+        return
+      }
+    } else {
+      await (client as Client).tui
+        .showToast({
+          body: {
+            title: "Recovery Failed",
+            message: "Max recovery attempts (3) reached for empty content error. Please start a new session.",
+            variant: "error",
+            duration: 10000,
+          },
+        })
+        .catch(() => {})
+      autoCompactState.compactionInProgress.delete(sessionID)
+      return
+    }
+  }
+
+  if (Date.now() - retryState.lastAttemptTime > 300000) {
+    retryState.attempt = 0
+    autoCompactState.fallbackStateBySession.delete(sessionID)
+    autoCompactState.truncateStateBySession.delete(sessionID)
+  }
+
+  if (!skipSummarize && retryState.attempt < RETRY_CONFIG.maxAttempts) {
     retryState.attempt++
     retryState.lastAttemptTime = Date.now()
 
@@ -234,7 +420,7 @@ export async function executeCompact(
           query: { directory },
         })
 
-        clearSessionState(autoCompactState, sessionID)
+        autoCompactState.compactionInProgress.delete(sessionID)
 
         setTimeout(async () => {
           try {
@@ -253,10 +439,21 @@ export async function executeCompact(
         const cappedDelay = Math.min(delay, RETRY_CONFIG.maxDelayMs)
 
         setTimeout(() => {
-          executeCompact(sessionID, msg, autoCompactState, client, directory)
+          executeCompact(sessionID, msg, autoCompactState, client, directory, experimental)
         }, cappedDelay)
         return
       }
+    } else {
+      await (client as Client).tui
+        .showToast({
+          body: {
+            title: "Summarize Skipped",
+            message: "Missing providerID or modelID. Skipping to revert...",
+            variant: "warning",
+            duration: 3000,
+          },
+        })
+        .catch(() => {})
     }
   }
 
@@ -301,10 +498,21 @@ export async function executeCompact(
         autoCompactState.compactionInProgress.delete(sessionID)
 
         setTimeout(() => {
-          executeCompact(sessionID, msg, autoCompactState, client, directory)
+          executeCompact(sessionID, msg, autoCompactState, client, directory, experimental)
         }, 1000)
         return
       } catch {}
+    } else {
+      await (client as Client).tui
+        .showToast({
+          body: {
+            title: "Revert Skipped",
+            message: "Could not find last message pair to revert.",
+            variant: "warning",
+            duration: 3000,
+          },
+        })
+        .catch(() => {})
     }
   }
 

src/hooks/anthropic-auto-compact/index.ts

@@ -1,7 +1,13 @@
 import type { PluginInput } from "@opencode-ai/plugin"
 import type { AutoCompactState, ParsedTokenLimitError } from "./types"
+import type { ExperimentalConfig } from "../../config"
 import { parseAnthropicTokenLimitError } from "./parser"
 import { executeCompact, getLastAssistant } from "./executor"
+import { log } from "../../shared/logger"
+
+export interface AnthropicAutoCompactOptions {
+  experimental?: ExperimentalConfig
+}
 
 function createAutoCompactState(): AutoCompactState {
   return {
@@ -10,12 +16,14 @@ function createAutoCompactState(): AutoCompactState {
     retryStateBySession: new Map(),
     fallbackStateBySession: new Map(),
     truncateStateBySession: new Map(),
+    emptyContentAttemptBySession: new Map(),
     compactionInProgress: new Set<string>(),
   }
 }
 
-export function createAnthropicAutoCompactHook(ctx: PluginInput) {
+export function createAnthropicAutoCompactHook(ctx: PluginInput, options?: AnthropicAutoCompactOptions) {
   const autoCompactState = createAutoCompactState()
+  const experimental = options?.experimental
 
   const eventHandler = async ({ event }: { event: { type: string; properties?: unknown } }) => {
     const props = event.properties as Record<string, unknown> | undefined
@@ -28,6 +36,7 @@ export function createAnthropicAutoCompactHook(ctx: PluginInput) {
         autoCompactState.retryStateBySession.delete(sessionInfo.id)
         autoCompactState.fallbackStateBySession.delete(sessionInfo.id)
         autoCompactState.truncateStateBySession.delete(sessionInfo.id)
+        autoCompactState.emptyContentAttemptBySession.delete(sessionInfo.id)
         autoCompactState.compactionInProgress.delete(sessionInfo.id)
       }
       return
@@ -35,9 +44,11 @@ export function createAnthropicAutoCompactHook(ctx: PluginInput) {
 
     if (event.type === "session.error") {
       const sessionID = props?.sessionID as string | undefined
+      log("[auto-compact] session.error received", { sessionID, error: props?.error })
       if (!sessionID) return
 
       const parsed = parseAnthropicTokenLimitError(props?.error)
+      log("[auto-compact] parsed result", { parsed, hasError: !!props?.error })
       if (parsed) {
         autoCompactState.pendingCompact.add(sessionID)
         autoCompactState.errorDataBySession.set(sessionID, parsed)
@@ -67,7 +78,8 @@ export function createAnthropicAutoCompactHook(ctx: PluginInput) {
             { providerID, modelID },
             autoCompactState,
             ctx.client,
-            ctx.directory
+            ctx.directory,
+            experimental
           )
         }, 300)
       }
@@ -79,7 +91,9 @@ export function createAnthropicAutoCompactHook(ctx: PluginInput) {
       const sessionID = info?.sessionID as string | undefined
 
       if (sessionID && info?.role === "assistant" && info.error) {
+        log("[auto-compact] message.updated with error", { sessionID, error: info.error })
         const parsed = parseAnthropicTokenLimitError(info.error)
+        log("[auto-compact] message.updated parsed result", { parsed })
         if (parsed) {
           parsed.providerID = info.providerID as string | undefined
           parsed.modelID = info.modelID as string | undefined
@@ -123,7 +137,8 @@ export function createAnthropicAutoCompactHook(ctx: PluginInput) {
         { providerID, modelID },
         autoCompactState,
         ctx.client,
-        ctx.directory
+        ctx.directory,
+        experimental
       )
     }
   }

src/hooks/anthropic-auto-compact/parser.ts

@@ -25,6 +25,7 @@ const TOKEN_LIMIT_KEYWORDS = [
   "token limit",
   "context length",
   "too many tokens",
+  "non-empty content",
 ]
 
 function extractTokensFromMessage(message: string): { current: number; max: number } | null {
@@ -46,6 +47,13 @@ function isTokenLimitError(text: string): boolean {
 
 export function parseAnthropicTokenLimitError(err: unknown): ParsedTokenLimitError | null {
   if (typeof err === "string") {
+    if (err.toLowerCase().includes("non-empty content")) {
+      return {
+        currentTokens: 0,
+        maxTokens: 0,
+        errorType: "non-empty content",
+      }
+    }
     if (isTokenLimitError(err)) {
       const tokens = extractTokensFromMessage(err)
       return {
@@ -142,6 +150,14 @@ export function parseAnthropicTokenLimitError(err: unknown): ParsedTokenLimitErr
     }
   }
 
+  if (combinedText.toLowerCase().includes("non-empty content")) {
+    return {
+      currentTokens: 0,
+      maxTokens: 0,
+      errorType: "non-empty content",
+    }
+  }
+
   if (isTokenLimitError(combinedText)) {
     return {
       currentTokens: 0,

src/hooks/anthropic-auto-compact/storage.ts

@@ -1,8 +1,19 @@
 import { existsSync, readdirSync, readFileSync, writeFileSync } from "node:fs"
+import { homedir } from "node:os"
 import { join } from "node:path"
 import { xdgData } from "xdg-basedir"
 
-const OPENCODE_STORAGE = join(xdgData ?? "", "opencode", "storage")
+let OPENCODE_STORAGE = join(xdgData ?? "", "opencode", "storage")
+
+// Fix for macOS where xdg-basedir points to ~/Library/Application Support
+// but OpenCode (cli) uses ~/.local/share
+if (process.platform === "darwin" && !existsSync(OPENCODE_STORAGE)) {
+  const localShare = join(homedir(), ".local", "share", "opencode", "storage")
+  if (existsSync(localShare)) {
+    OPENCODE_STORAGE = localShare
+  }
+}
+
 const MESSAGE_STORAGE = join(OPENCODE_STORAGE, "message")
 const PART_STORAGE = join(OPENCODE_STORAGE, "part")
 
@@ -171,3 +182,76 @@ export function countTruncatedResults(sessionID: string): number {
 
   return count
 }
+
+export interface AggressiveTruncateResult {
+  success: boolean
+  sufficient: boolean
+  truncatedCount: number
+  totalBytesRemoved: number
+  targetBytesToRemove: number
+  truncatedTools: Array<{ toolName: string; originalSize: number }>
+}
+
+export function truncateUntilTargetTokens(
+  sessionID: string,
+  currentTokens: number,
+  maxTokens: number,
+  targetRatio: number = 0.8,
+  charsPerToken: number = 4
+): AggressiveTruncateResult {
+  const targetTokens = Math.floor(maxTokens * targetRatio)
+  const tokensToReduce = currentTokens - targetTokens
+  const charsToReduce = tokensToReduce * charsPerToken
+
+  if (tokensToReduce <= 0) {
+    return {
+      success: true,
+      sufficient: true,
+      truncatedCount: 0,
+      totalBytesRemoved: 0,
+      targetBytesToRemove: 0,
+      truncatedTools: [],
+    }
+  }
+
+  const results = findToolResultsBySize(sessionID)
+
+  if (results.length === 0) {
+    return {
+      success: false,
+      sufficient: false,
+      truncatedCount: 0,
+      totalBytesRemoved: 0,
+      targetBytesToRemove: charsToReduce,
+      truncatedTools: [],
+    }
+  }
+
+  let totalRemoved = 0
+  let truncatedCount = 0
+  const truncatedTools: Array<{ toolName: string; originalSize: number }> = []
+
+  for (const result of results) {
+    const truncateResult = truncateToolResult(result.partPath)
+    if (truncateResult.success) {
+      truncatedCount++
+      const removedSize = truncateResult.originalSize ?? result.outputSize
+      totalRemoved += removedSize
+      truncatedTools.push({
+        toolName: truncateResult.toolName ?? result.toolName,
+        originalSize: removedSize,
+      })
+    }
+  }
+
+  const sufficient = totalRemoved >= charsToReduce
+
+  return {
+    success: truncatedCount > 0,
+    sufficient,
+    truncatedCount,
+    totalBytesRemoved: totalRemoved,
+    targetBytesToRemove: charsToReduce,
+    truncatedTools,
+  }
+}

src/hooks/anthropic-auto-compact/types.ts

@@ -28,6 +28,7 @@ export interface AutoCompactState {
   retryStateBySession: Map<string, RetryState>
   fallbackStateBySession: Map<string, FallbackState>
   truncateStateBySession: Map<string, TruncateState>
+  emptyContentAttemptBySession: Map<string, number>
   compactionInProgress: Set<string>
 }
 
@@ -44,6 +45,8 @@ export const FALLBACK_CONFIG = {
 } as const
 
 export const TRUNCATE_CONFIG = {
-  maxTruncateAttempts: 10,
+  maxTruncateAttempts: 20,
-  minOutputSizeToTruncate: 1000,
+  minOutputSizeToTruncate: 500,
+  targetTokenRatio: 0.5,
+  charsPerToken: 4,
 } as const

src/hooks/index.ts

@@ -1,14 +1,14 @@
 export { createTodoContinuationEnforcer, type TodoContinuationEnforcer } from "./todo-continuation-enforcer";
 export { createContextWindowMonitorHook } from "./context-window-monitor";
 export { createSessionNotification } from "./session-notification";
-export { createSessionRecoveryHook, type SessionRecoveryHook } from "./session-recovery";
+export { createSessionRecoveryHook, type SessionRecoveryHook, type SessionRecoveryOptions } from "./session-recovery";
 export { createCommentCheckerHooks } from "./comment-checker";
 export { createGrepOutputTruncatorHook } from "./grep-output-truncator";
 export { createToolOutputTruncatorHook } from "./tool-output-truncator";
 export { createDirectoryAgentsInjectorHook } from "./directory-agents-injector";
 export { createDirectoryReadmeInjectorHook } from "./directory-readme-injector";
 export { createEmptyTaskResponseDetectorHook } from "./empty-task-response-detector";
-export { createAnthropicAutoCompactHook } from "./anthropic-auto-compact";
+export { createAnthropicAutoCompactHook, type AnthropicAutoCompactOptions } from "./anthropic-auto-compact";
 export { createThinkModeHook } from "./think-mode";
 export { createClaudeCodeHooksHook } from "./claude-code-hooks";
 export { createRulesInjectorHook } from "./rules-injector";

src/hooks/session-recovery/index.ts

@@ -1,5 +1,6 @@
 import type { PluginInput } from "@opencode-ai/plugin"
 import type { createOpencodeClient } from "@opencode-ai/sdk"
+import type { ExperimentalConfig } from "../../config"
 import {
   findEmptyMessages,
   findEmptyMessageByIndex,
@@ -14,7 +15,11 @@ import {
   replaceEmptyTextParts,
   stripThinkingParts,
 } from "./storage"
-import type { MessageData } from "./types"
+import type { MessageData, ResumeConfig } from "./types"
+
+export interface SessionRecoveryOptions {
+  experimental?: ExperimentalConfig
+}
 
 type Client = ReturnType<typeof createOpencodeClient>
 
@@ -22,7 +27,6 @@ type RecoveryErrorType =
   | "tool_result_missing"
   | "thinking_block_order"
   | "thinking_disabled_violation"
-  | "empty_content_message"
   | null
 
 interface MessageInfo {
@@ -49,6 +53,41 @@ interface MessagePart {
   input?: Record<string, unknown>
 }
 
+const RECOVERY_RESUME_TEXT = "[session recovered - continuing previous task]"
+
+function findLastUserMessage(messages: MessageData[]): MessageData | undefined {
+  for (let i = messages.length - 1; i >= 0; i--) {
+    if (messages[i].info?.role === "user") {
+      return messages[i]
+    }
+  }
+  return undefined
+}
+
+function extractResumeConfig(userMessage: MessageData | undefined, sessionID: string): ResumeConfig {
+  return {
+    sessionID,
+    agent: userMessage?.info?.agent,
+    model: userMessage?.info?.model,
+  }
+}
+
+async function resumeSession(client: Client, config: ResumeConfig): Promise<boolean> {
+  try {
+    await client.session.prompt({
+      path: { id: config.sessionID },
+      body: {
+        parts: [{ type: "text", text: RECOVERY_RESUME_TEXT }],
+        agent: config.agent,
+        model: config.model,
+      },
+    })
+    return true
+  } catch {
+    return false
+  }
+}
+
 function getErrorMessage(error: unknown): string {
   if (!error) return ""
   if (typeof error === "string") return error.toLowerCase()
@@ -104,15 +143,6 @@ function detectErrorType(error: unknown): RecoveryErrorType {
     return "thinking_disabled_violation"
   }
 
-  if (
-    message.includes("non-empty content") ||
-    message.includes("must have non-empty content") ||
-    (message.includes("content") && message.includes("is empty")) ||
-    (message.includes("content field") && message.includes("empty"))
-  ) {
-    return "empty_content_message"
-  }
-
   return null
 }
 
@@ -286,8 +316,9 @@ export interface SessionRecoveryHook {
   setOnRecoveryCompleteCallback: (callback: (sessionID: string) => void) => void
 }
 
-export function createSessionRecoveryHook(ctx: PluginInput): SessionRecoveryHook {
+export function createSessionRecoveryHook(ctx: PluginInput, options?: SessionRecoveryOptions): SessionRecoveryHook {
   const processingErrors = new Set<string>()
+  const experimental = options?.experimental
   let onAbortCallback: ((sessionID: string) => void) | null = null
   let onRecoveryCompleteCallback: ((sessionID: string) => void) | null = null
 
@@ -338,13 +369,11 @@ export function createSessionRecoveryHook(ctx: PluginInput): SessionRecoveryHook
         tool_result_missing: "Tool Crash Recovery",
         thinking_block_order: "Thinking Block Recovery",
         thinking_disabled_violation: "Thinking Strip Recovery",
-        empty_content_message: "Empty Message Recovery",
       }
       const toastMessages: Record<RecoveryErrorType & string, string> = {
         tool_result_missing: "Injecting cancelled tool results...",
         thinking_block_order: "Fixing message structure...",
         thinking_disabled_violation: "Stripping thinking blocks...",
-        empty_content_message: "Fixing empty message...",
       }
 
       await ctx.client.tui
@@ -364,10 +393,18 @@ export function createSessionRecoveryHook(ctx: PluginInput): SessionRecoveryHook
         success = await recoverToolResultMissing(ctx.client, sessionID, failedMsg)
       } else if (errorType === "thinking_block_order") {
         success = await recoverThinkingBlockOrder(ctx.client, sessionID, failedMsg, ctx.directory, info.error)
+        if (success && experimental?.auto_resume) {
+          const lastUser = findLastUserMessage(msgs ?? [])
+          const resumeConfig = extractResumeConfig(lastUser, sessionID)
+          await resumeSession(ctx.client, resumeConfig)
+        }
       } else if (errorType === "thinking_disabled_violation") {
         success = await recoverThinkingDisabledViolation(ctx.client, sessionID, failedMsg)
-      } else if (errorType === "empty_content_message") {
+        if (success && experimental?.auto_resume) {
-        success = await recoverEmptyContentMessage(ctx.client, sessionID, failedMsg, ctx.directory, info.error)
+          const lastUser = findLastUserMessage(msgs ?? [])
+          const resumeConfig = extractResumeConfig(lastUser, sessionID)
+          await resumeSession(ctx.client, resumeConfig)
+        }
       }
 
       return success

src/hooks/session-recovery/types.ts

@@ -69,6 +69,13 @@ export interface MessageData {
     sessionID?: string
     parentID?: string
     error?: unknown
+    agent?: string
+    model?: {
+      providerID: string
+      modelID: string
+    }
+    system?: string
+    tools?: Record<string, boolean>
   }
   parts?: Array<{
     type: string
@@ -80,3 +87,12 @@ export interface MessageData {
     callID?: string
   }>
 }
+
+export interface ResumeConfig {
+  sessionID: string
+  agent?: string
+  model?: {
+    providerID: string
+    modelID: string
+  }
+}

src/index.ts

@@ -177,7 +177,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
     ? createContextWindowMonitorHook(ctx)
     : null;
   const sessionRecovery = isHookEnabled("session-recovery")
-    ? createSessionRecoveryHook(ctx)
+    ? createSessionRecoveryHook(ctx, { experimental: pluginConfig.experimental })
     : null;
   const sessionNotification = isHookEnabled("session-notification")
     ? createSessionNotification(ctx)
@@ -212,7 +212,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
     disabledHooks: (pluginConfig.claude_code?.hooks ?? true) ? undefined : true,
   });
   const anthropicAutoCompact = isHookEnabled("anthropic-auto-compact")
-    ? createAnthropicAutoCompactHook(ctx)
+    ? createAnthropicAutoCompactHook(ctx, { experimental: pluginConfig.experimental })
     : null;
   const rulesInjector = isHookEnabled("rules-injector")
     ? createRulesInjectorHook(ctx)