{"record":{"id":"40edce17e9015b6e","repo":"Hmbown/CodeWhale","slug":"images-exceed-the-5-mib-total-limit","errorCode":null,"errorMessage":"images exceed the 5 MiB total limit","messagePattern":"images exceed the 5 MiB total limit","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/tui/src/image_attach.rs","lineNumber":152,"sourceCode":"                bail!(\n                    \"image {} exceeds the {} MiB limit\",\n                    index + 1,\n                    per_image_limit / (1024 * 1024)\n                );\n            }\n            let bytes = STANDARD\n                .decode(&image.data_base64)\n                .map_err(|_| anyhow::anyhow!(\"image {} has invalid base64\", index + 1))?;\n            if bytes.len() > per_image_limit {\n                bail!(\n                    \"image {} exceeds the {} MiB limit\",\n                    index + 1,\n                    per_image_limit / (1024 * 1024)\n                );\n            }\n            total = total.saturating_add(bytes.len());\n            if total_limit.is_some_and(|limit| total > limit) {\n                bail!(\"images exceed the 5 MiB total limit\");\n            }\n            let attached = encode_image_bytes(&bytes, &format!(\"image {}\", index + 1))?;\n            if image.mime != attached.media_type {\n                bail!(\"image {} MIME does not match its content\", index + 1);\n            }\n            decode_and_guard_image(&bytes)?;\n            // Standard padded base64 is the one replay representation.\n            if STANDARD.encode(&bytes) != image.data_base64 {\n                bail!(\"image {} base64 is not canonical\", index + 1);\n            }\n            Ok(attached.content_block())\n        })\n        .collect()\n}\n\n/// Reuse durable canonical bytes for retry, never reread a path or URL.\npub(crate) fn runtime_images_from_blocks(\n    blocks: &[ContentBlock],","sourceCodeStart":134,"sourceCodeEnd":170,"githubUrl":"https://github.com/Hmbown/CodeWhale/blob/73e0f67d83c59909b571efdfc88c4bc28c309cb1/crates/tui/src/image_attach.rs#L134-L170","documentation":"The cumulative decoded size of all images in one prepare_images_with_limit call exceeds the total budget (5 MiB); the running total is checked after each image and bails as soon as it crosses total_limit. Individual images can each be under the per-image cap while together exceeding the aggregate cap.","triggerScenarios":"prepare_runtime_images (which passes Some(MAX_RUNTIME_IMAGE_TOTAL_BYTES)) or prepare_stored_images with several images whose decoded sizes sum past the total limit — e.g. five 1.2 MiB screenshots in one attach batch.","commonSituations":"Attaching multiple screenshots of a long page; a multi-image bug report; looping over files and attaching all of them in one request.","solutions":["Attach fewer images per call or split them across multiple requests.","Compress each image so the batch total stays under 5 MiB.","Pre-compute the sum of decoded sizes in the caller and trim the batch before attaching.","Prioritize the 1–2 images that matter and describe the rest in text."],"exampleFix":"// before\nlet blocks = prepare_runtime_images(&screenshots)?;  // 6 x ~1MiB\n// after\nlet blocks = prepare_runtime_images(&screenshots.into_iter().take(3).collect::<Vec<_>>())?;","handlingStrategy":"validation","validationCode":"let total: usize = images.iter()\n    .filter_map(|i| STANDARD.decode(&i.data_base64).ok().map(|b| b.len()))\n    .sum();\nif total > MAX_RUNTIME_IMAGE_TOTAL_BYTES { /* trim the batch */ }","typeGuard":null,"tryCatchPattern":"match prepare_runtime_images(&images) {\n    Err(e) if e.to_string().contains(\"total limit\") => {\n        eprintln!(\"batch exceeds 5 MiB total; attach fewer or smaller images\"); }\n    other => other?,\n}","preventionTips":["Track cumulative decoded size while collecting attachments","Compress the whole batch, not just individual images","Split large image sets across multiple requests"],"tags":["image","limit","validation"],"backgroundTag":"file-size-limit-exceeded","analyzedSha":"73e0f67d83c59909b571efdfc88c4bc28c309cb1","analyzedAt":"2026-09-22T01:30:00.501Z","contentChangedAt":"2026-09-22T01:30:00.501Z","schemaVersion":2},"datasetVersion":"2026-09-22T16:17:23.217Z"}