Opencode crashes attempting to read too big file #10157

Activity

1. alkar1

   added

   bugSomething isn't workingSomething isn't working

   on Jan 23, 2026
2. github-actions

   assigned

   thdxr

   on Jan 23, 2026
3. github-actions

   added

   perfIndicates a performance issue or need for optimizationIndicates a performance issue or need for optimization

   on Jan 23, 2026
4. github-actions commented on Jan 23, 2026

   

   github-actionsBot

   on Jan 23, 2026 – with GitHub Actions

   Contributor

   More actions

   This issue might be a duplicate of existing issues. Please check:

   • Request Entity Too Large not caught before trying to read large files #8956: Request Entity Too Large not caught before trying to read large files
   • Massive memory use on opening opencode when there is a very large file #2585: Massive memory use on opening opencode when there is a very large file
   • Memory usage grows very quickly when running commands with large output #9699: Memory usage grows very quickly when running commands with large output
   • OpenCode doesn't perform as well as Claude Code when processing large files #2003: OpenCode doesn't perform as well as Claude Code when processing large files

   Feel free to ignore if none of these address your specific case.
5. alkar1 commented on Jan 23, 2026

   

   alkar1

   on Jan 23, 2026

   Author

   More actions

   For quick workaround create file .opencode/plugin/safety.ts with following code:

   import { type Hooks, type PluginInput } from "./index"
   
   const MAX_FILE_SIZE = 10 * 1024 * 1024 // 10MB
   
   export default function SafetyPlugin(input: PluginInput): Hooks {
     return {
       "tool.execute.before": ({ tool }, { args }) => {
         if (tool !== "read") return
   
         const { filePath } = args as { filePath: string }
   
         // Skip non-existent files - delegate to read tool's error handling
         const size = Bun.file(filePath).size
         if (size === 0) return
   
         if (size > MAX_FILE_SIZE) {
           const sizeMB = (size / 1024 / 1024).toFixed(2)
           throw new Error(`File too large: ${filePath} (${sizeMB}MB exceeds ${MAX_FILE_SIZE / 1024 / 1024}MB limit)`)
         }
       },
     }
   }
   

   👍React with 👍1Reacted by Arsham Shirvani
6. skyler14 commented on Jan 23, 2026

   

   skyler14

   on Jan 23, 2026

   More actions

   For quick workaround create file .opencode/plugin/safety.ts with following code:

   import { type Hooks, type PluginInput } from "./index"
   
   const MAX_FILE_SIZE = 10 * 1024 * 1024 // 10MB
   
   export default function SafetyPlugin(input: PluginInput): Hooks {
     return {
       "tool.execute.before": ({ tool }, { args }) => {
         if (tool !== "read") return
   
         const { filePath } = args as { filePath: string }
   
         // Skip non-existent files - delegate to read tool's error handling
         const size = Bun.file(filePath).size
         if (size === 0) return
   
         if (size > MAX_FILE_SIZE) {
           const sizeMB = (size / 1024 / 1024).toFixed(2)
           throw new Error(`File too large: ${filePath} (${sizeMB}MB exceeds ${MAX_FILE_SIZE / 1024 / 1024}MB limit)`)
         }
       },
     }
   }
   

   installing this in ~/.opencode or somewhere else? Tried on mac m1 in that dir and no luck
7. jogoossens commented on Mar 4, 2026

   

   jogoossens

   on Mar 4, 2026

   More actions

   also having issues, spending a lot of rounds to open larger files

   "RangeError: Maximum call stack size exceeded" → fallback to cat/head
8. thdxr

   removed

   bugSomething isn't workingSomething isn't working

   perfIndicates a performance issue or need for optimizationIndicates a performance issue or need for optimization

   on May 3, 2026
9. github-actions commented on Jul 6, 2026

   

   github-actionsBot

   on Jul 6, 2026 – with GitHub Actions

   Contributor

   More actions

   To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.
10. github-actions

    closed this as not plannedon Jul 6, 2026