{"record":{"id":"9f2246c241eb93cf","repo":"vxcontrol/pentagi","slug":"failed-to-write-edited-content-of-s-w","errorCode":null,"errorMessage":"failed to write edited content of %s: %w","messagePattern":"failed to write edited content of (.+?): %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"backend/pkg/tools/terminal.go","lineNumber":521,"sourceCode":"\tif path == \"\" {\n\t\treturn \"\", fmt.Errorf(\"path is required and cannot be empty\")\n\t}\n\tif strings.TrimSpace(diffText) == \"\" {\n\t\treturn \"\", fmt.Errorf(\"diff is required and cannot be empty\")\n\t}\n\n\tcurrent, err := t.readFileFromContainer(ctx, flowID, path)\n\tif err != nil {\n\t\treturn \"\", fmt.Errorf(\"failed to read current content of %s before editing: %w\", path, err)\n\t}\n\n\tnewContent, hunksApplied, err := ApplyUnifiedDiff(current, diffText)\n\tif err != nil {\n\t\treturn \"\", fmt.Errorf(\"failed to apply diff to %s: %w\", path, err)\n\t}\n\n\tif err := t.writeFileToContainer(ctx, flowID, path, newContent); err != nil {\n\t\treturn \"\", fmt.Errorf(\"failed to write edited content of %s: %w\", path, err)\n\t}\n\n\tsuccessMsg := fmt.Sprintf(\"Applied %d diff hunk(s) to %s (%d -> %d bytes)\", hunksApplied, path, len(current), len(newContent))\n\tstyledMsg := fmt.Sprintf(\"%s%s%s%s\", ansiColorSystemMsg, successMsg, ansiColorReset, ansiLineTerminator)\n\tif _, err := t.tlp.PutMsg(ctx, database.TermlogTypeStdin, styledMsg, t.containerID, t.taskID, t.subtaskID); err != nil {\n\t\treturn \"\", fmt.Errorf(\"failed to put terminal log (edit file cmd): %w\", err)\n\t}\n\n\treturn successMsg, nil\n}\n\n// PrimaryTerminalName returns the docker container name for a flow's primary\n// terminal, namespaced by the configured tenant.\n//\n//\t\"pentagi-terminal-1\"       (single instance)\n//\t\"acme-pentagi-terminal-1\"  (TENANT_ID=acme)\n//\n// The tenant goes in FRONT of the well-known prefix on purpose: the installer's","sourceCodeStart":503,"sourceCodeEnd":539,"githubUrl":"https://github.com/vxcontrol/pentagi/blob/ea665308baaff015b226f308438a68d929d0f29b/backend/pkg/tools/terminal.go#L503-L539","documentation":"Once the diff applied, EditFile writes the new content back via writeFileToContainer. This error wraps any failure from that write path — practically it surfaces the CopyToContainer failure (missing parent directory, container not running, permissions) since the tar-generation errors are rare. Importantly, the edit is then incomplete: the diff applied in memory but persistence failed, so the on-disk file still holds the old content.","triggerScenarios":"Writing back to a path whose parent directory disappeared or was never a directory in the container; the container stopped between the read and the write; read-only mount or permission denied on the target path; Docker daemon connection failure during CopyToContainer.","commonSituations":"Agent editing files under a directory that a prior cleanup step removed; container restarted (fresh filesystem) between read and write on a long-running edit; writing into /proc, /sys, or other read-only locations; disk-full on the container's writable layer.","solutions":["Read the wrapped %w cause and fix accordingly: 'no such directory' → mkdir -p first; 'not running' → restart the flow container; 'permission denied' → choose a writable path or fix the mount","Check container disk space (docker system df, df inside container) if the cause indicates a write error","Retry EditFile after confirming the container is running and the directory exists","If diffs keep failing to persist, switch to WriteFile with the full content as a fallback","Avoid editing files on read-only or volatile mounts; persist data under a volume-backed path"],"exampleFix":"// before\nif err := t.writeFileToContainer(ctx, flowID, path, newContent); err != nil {\n    return \"\", fmt.Errorf(\"failed to write edited content of %s: %w\", path, err)\n}\n// after\nif err := t.writeFileToContainer(ctx, flowID, path, newContent); err != nil {\n    if mkErr := t.ensureDirExists(ctx, containerName, filepath.Dir(path)); mkErr == nil {\n        if retryErr := t.writeFileToContainer(ctx, flowID, path, newContent); retryErr == nil {\n            return successMsg, nil\n        }\n    }\n    return \"\", fmt.Errorf(\"failed to write edited content of %s: %w\", path, err)\n}","handlingStrategy":"retry","validationCode":"out, _ := term.ExecuteCommand(ctx, flowID, fmt.Sprintf(\"test -d %s -a -w %s && echo OK\", filepath.Dir(path), filepath.Dir(path)))\nif !strings.Contains(out, \"OK\") {\n    term.ExecuteCommand(ctx, flowID, fmt.Sprintf(\"mkdir -p %s\", filepath.Dir(path)))\n}","typeGuard":null,"tryCatchPattern":"msg, err := term.EditFile(ctx, flowID, path, diff)\nif err != nil && strings.Contains(err.Error(), \"failed to write edited content\") {\n    time.Sleep(2 * time.Second) // container may have been restarting\n    msg, err = term.EditFile(ctx, flowID, path, diff) // re-reads fresh content\n}","preventionTips":["Verify container is running and directory is writable before edits","Use volume-backed, writable paths for agent file operations","Monitor container disk space; writes fail on a full writable layer","Keep read→write windows short; avoid container restarts mid-edit"],"tags":["docker","copy-to-container","file-write","edit-file"],"backgroundTag":"docker-copy-to-container-failed","analyzedSha":"ea665308baaff015b226f308438a68d929d0f29b","analyzedAt":"2026-09-01T14:16:31.421Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}