🐛 fix(model-runtime): filter unsupported image types (SVG) before sending to vision models by arvinxx · Pull Request #11698 · lobehub/lobehub

arvinxx · 2026-01-22T05:27:32Z

Summary

Filter out unsupported image formats (like SVG) in model-runtime before sending to vision models
Add supported image types validation in Anthropic and Google context builders
Return undefined for unsupported formats, which gets filtered out by existing filter(Boolean) logic

Problem

Vision models like Claude and Gemini don't support SVG images (image/svg+xml). Previously, SVG images were converted to base64 and passed through unchanged, causing runtime errors when the model API rejected the unsupported format.

Solution

Added MIME type validation at the context builder level:

Supported formats:

image/jpeg
image/jpg
image/png
image/gif
image/webp

Unsupported formats (filtered out):

image/svg+xml
Any other non-standard image formats

Changes

packages/model-runtime/src/core/contextBuilders/anthropic.ts: Add image type validation
packages/model-runtime/src/core/contextBuilders/google.ts: Add image type validation
packages/model-runtime/src/core/contextBuilders/anthropic.test.ts: Add 2 test cases
packages/model-runtime/src/core/contextBuilders/google.test.ts: Add 2 test cases

Test plan

Added test for SVG base64 image filtering (Anthropic)
Added test for SVG URL image filtering (Anthropic)
Added test for SVG base64 image filtering (Google)
Added test for SVG URL image filtering (Google)
All 60 context builder tests pass
Type check passes

Related Issues

Closes: LOBE-4125

🤖 Generated with Claude Code

Summary by Sourcery

Filter unsupported image formats from vision model context builders to avoid runtime errors when sending images to Anthropic and Google models.

Bug Fixes:

Skip building context blocks/parts for unsupported image MIME types (such as SVG) in Anthropic and Google context builders, returning undefined so they are filtered out before reaching the model APIs.

Tests:

Add Anthropic and Google context builder tests to assert SVG images (base64 and URL) are treated as unsupported and omitted from the built context.

…ding to vision models Vision models like Claude and Gemini don't support SVG images (image/svg+xml). Previously, SVG images were passed through unchanged, causing runtime errors. Changes: - Add supported image types check in Anthropic context builder - Add supported image types check in Google context builder - Filter out unsupported formats (like SVG) by returning undefined - Add 4 test cases for SVG filtering (base64 and URL scenarios) Supported formats: image/jpeg, image/jpg, image/png, image/gif, image/webp Closes: LOBE-4125 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

vercel · 2026-01-22T05:27:38Z

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Project	Deployment	Review	Updated (UTC)
lobehub	Ready	Preview, Comment	Jan 22, 2026 6:53am

sourcery-ai · 2026-01-22T05:27:39Z

Reviewer's Guide

Adds MIME-type-based filtering of unsupported image formats (notably SVG) in Anthropic and Google vision context builders, returning undefined for unsupported images so they are dropped by existing filtering, and adds tests to cover both base64 and URL SVG cases.

Sequence diagram for Anthropic image_url handling with MIME-type filtering

sequenceDiagram
  actor Caller
  participant buildAnthropicBlock
  participant parseDataUri
  participant imageUrlToBase64
  participant isImageTypeSupported

  Caller->>buildAnthropicBlock: buildAnthropicBlock(content_image_url)
  buildAnthropicBlock->>parseDataUri: parseDataUri(image_url.url)
  parseDataUri-->>buildAnthropicBlock: type,mimeType,base64

  alt type === base64
    buildAnthropicBlock->>isImageTypeSupported: isImageTypeSupported(mimeType)
    alt supported
      buildAnthropicBlock-->>Caller: Anthropic_ImageBlockParam
    else unsupported (e.g. image/svg+xml)
      buildAnthropicBlock-->>Caller: undefined
    end
  else type === url
    buildAnthropicBlock->>imageUrlToBase64: imageUrlToBase64(image_url.url)
    imageUrlToBase64-->>buildAnthropicBlock: base64,mimeType
    buildAnthropicBlock->>isImageTypeSupported: isImageTypeSupported(mimeType)
    alt supported
      buildAnthropicBlock-->>Caller: Anthropic_ImageBlockParam
    else unsupported (e.g. image/svg+xml)
      buildAnthropicBlock-->>Caller: undefined
    end
  end

Sequence diagram for Google image_url handling with MIME-type filtering

sequenceDiagram
  actor Caller
  participant buildGooglePart
  participant parseDataUri
  participant imageUrlToBase64
  participant isImageTypeSupported

  Caller->>buildGooglePart: buildGooglePart(content_image_url)
  buildGooglePart->>parseDataUri: parseDataUri(image_url.url)
  parseDataUri-->>buildGooglePart: type,mimeType,base64

  alt type === base64
    buildGooglePart->>isImageTypeSupported: isImageTypeSupported(mimeType)
    alt supported
      buildGooglePart-->>Caller: Google_Part_with_inlineData
    else unsupported (e.g. image/svg+xml)
      buildGooglePart-->>Caller: undefined
    end
  else type === url
    buildGooglePart->>imageUrlToBase64: imageUrlToBase64(image_url.url)
    imageUrlToBase64-->>buildGooglePart: base64,mimeType
    buildGooglePart->>isImageTypeSupported: isImageTypeSupported(mimeType)
    alt supported
      buildGooglePart-->>Caller: Google_Part_with_inlineData
    else unsupported (e.g. image/svg+xml)
      buildGooglePart-->>Caller: undefined
    end
  end

File-Level Changes

Change	Details	Files
Add MIME type allowlists and shared helper functions to validate supported image formats in Anthropic and Google context builders.	Introduce per-provider supported image type sets including common raster formats (jpeg, jpg, png, gif, webp). Add a small helper function in each file that treats null mimeType as allowed but rejects non-allowed explicit types using a case-insensitive check. Wire the helper into image handling logic so unsupported image types short-circuit and return undefined instead of constructing an image block/part.	`packages/model-runtime/src/core/contextBuilders/anthropic.ts` `packages/model-runtime/src/core/contextBuilders/google.ts`
Update Anthropic context builder tests to assert that unsupported SVG images are filtered out for both base64 data URIs and remote URLs.	Mock parseDataUri to return SVG base64 metadata and verify buildAnthropicBlock returns undefined for base64 SVG input. Mock parseDataUri and imageUrlToBase64 so a URL ultimately resolves to SVG mimeType and verify buildAnthropicBlock returns undefined for URL SVG input.	`packages/model-runtime/src/core/contextBuilders/anthropic.test.ts`
Update Google context builder tests to assert that unsupported SVG images are filtered out for both base64 data URIs and remote URLs.	Mock parseDataUri to return SVG base64 metadata and verify buildGooglePart returns undefined for base64 SVG input. Mock parseDataUri and imageUrlToBase64 so a URL ultimately resolves to SVG mimeType and verify buildGooglePart returns undefined for URL SVG input.	`packages/model-runtime/src/core/contextBuilders/google.test.ts`

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gru-agent · 2026-01-22T05:27:45Z

TestGru Assignment

Summary

Link	CommitId	Status	Reason
Detail	`52a7041`	✅ Finished

History Assignment

Files

File	Pull Request
packages/model-runtime/src/core/contextBuilders/google.ts	❌ Failed (I failed to setup the environment.)
packages/model-runtime/src/core/contextBuilders/anthropic.ts	❌ Failed (I failed to setup the environment.)

Tip

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sourcery-ai

Hey - I've left some high level feedback:

The isImageTypeSupported helper and supported image type sets are duplicated between the Anthropic and Google context builders; consider extracting a shared utility (with per-provider allowlists if needed) so future changes to supported formats stay consistent.
The implementation currently treats a null mimeType as supported in isImageTypeSupported, which seems to contradict the intent to filter out non-standard/unsupported formats; you might want to treat null as unsupported (or only allow it in the specific base64 fallback case) to avoid silently passing unknown types through.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The `isImageTypeSupported` helper and supported image type sets are duplicated between the Anthropic and Google context builders; consider extracting a shared utility (with per-provider allowlists if needed) so future changes to supported formats stay consistent.
- The implementation currently treats a `null` mimeType as supported in `isImageTypeSupported`, which seems to contradict the intent to filter out non-standard/unsupported formats; you might want to treat `null` as unsupported (or only allow it in the specific base64 fallback case) to avoid silently passing unknown types through.

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chatgpt-codex-connector · 2026-01-22T05:30:57Z

packages/model-runtime/src/core/contextBuilders/anthropic.ts

+const isImageTypeSupported = (mimeType: string | null): boolean => {
+  if (!mimeType) return true;
+  return ANTHROPIC_SUPPORTED_IMAGE_TYPES.has(mimeType.toLowerCase());


Normalize MIME parameters before whitelist check

When the image comes from a URL, imageUrlToBase64 returns blob.type, which can include parameters (e.g., image/png; charset=binary). The new isImageTypeSupported does an exact match against the whitelist, so valid images with parameters are treated as unsupported and dropped (undefined). This can silently strip otherwise supported images (or entire messages) from Anthropic/Gemini requests when servers add MIME parameters. Consider normalizing by splitting on ; before the set lookup.

Useful? React with 👍 / 👎.

codecov · 2026-01-22T05:32:53Z

Codecov Report

❌ Patch coverage is 92.85714% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.08%. Comparing base (de6009d) to head (52a7041).
⚠️ Report is 11 commits behind head on next.

Additional details and impacted files

@@            Coverage Diff            @@
##             next   #11698     +/-   ##
=========================================
  Coverage   74.07%   74.08%             
=========================================
  Files        1188     1188             
  Lines       94668    94695     +27     
  Branches    10429    12470   +2041     
=========================================
+ Hits        70126    70151     +25     
- Misses      24452    24454      +2     
  Partials       90       90

Flag	Coverage Δ
app	`66.88% <ø> (ø)`
database	`93.29% <ø> (ø)`
packages/agent-runtime	`90.20% <ø> (ø)`
packages/context-engine	`85.39% <ø> (ø)`
packages/conversation-flow	`92.28% <ø> (ø)`
packages/file-loaders	`88.66% <ø> (ø)`
packages/memory-user-memory	`69.68% <ø> (ø)`
packages/model-bank	`100.00% <ø> (ø)`
packages/model-runtime	`86.72% <92.85%> (+0.01%)`	⬆️
packages/prompts	`79.33% <ø> (ø)`
packages/python-interpreter	`92.90% <ø> (ø)`
packages/ssrf-safe-fetch	`0.00% <ø> (ø)`
packages/utils	`93.25% <ø> (ø)`
packages/web-crawler	`95.62% <ø> (ø)`

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
Store	`66.80% <ø> (ø)`
Services	`50.55% <ø> (ø)`
Server	`67.81% <ø> (ø)`
Libs	`41.13% <ø> (ø)`
Utils	`93.82% <ø> (ø)`

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lobehubbot · 2026-01-22T09:39:50Z

❤️ Great PR @arvinxx ❤️

The growth of project is inseparable from user feedback and contribution, thanks for your contribution! If you are interesting with the lobehub developer community, please join our discord and then dm @arvinxx or @canisminor1990. They will invite you to our private developer channel. We are talking about the lobe-chat development or sharing ai newsletter around the world.

## [Version 2.0.0-next.339](v2.0.0-next.338...v2.0.0-next.339) <sup>Released on **2026-01-22**</sup> #### ♻ Code Refactoring - **misc**: Move vercel-react-best-practices skills to .agents directory. #### ✨ Features - **misc**: Skill setting page and skill store. #### 🐛 Bug Fixes - **model-runtime**: Filter unsupported image types (SVG) before sending to vision models. - **misc**: Fix group broadcast trigger tool use, fix local system tools. <br/> <details> <summary><kbd>Improvements and Fixes</kbd></summary> #### Code refactoring * **misc**: Move vercel-react-best-practices skills to .agents directory, closes [#11703](#11703) ([6df7731](6df7731)) #### What's improved * **misc**: Skill setting page and skill store, closes [#11665](#11665) ([d8c0c26](d8c0c26)) #### What's fixed * **model-runtime**: Filter unsupported image types (SVG) before sending to vision models, closes [#11698](#11698) ([c0c99a7](c0c99a7)) * **misc**: Fix group broadcast trigger tool use, closes [#11646](#11646) ([831a9b3](831a9b3)) * **misc**: Fix local system tools, closes [#11702](#11702) ([6548fc7](6548fc7)) </details> <div align="right"> [![](https://img.shields.io/badge/-BACK_TO_TOP-151515?style=flat-square)](#readme-top) </div>

lobehubbot · 2026-01-22T11:43:05Z

🎉 This PR is included in version 2.0.0-next.339 🎉

The release is available on:

Your semantic-release bot 📦🚀

## [Version 1.153.0](v1.152.0...v1.153.0) <sup>Released on **2026-01-23**</sup> #### ♻ Code Refactoring - **auth**: Remove NEXT_PUBLIC_AUTH_URL env variable. - **model-select**: Migrate FunctionCallingModelSelect to LobeSelect. - **ModelSwitchPanel**: Migrate from Popover to DropdownMenu with virtual scrolling. - **userMemories**: Removed un-used code. - **misc**: Improve memory data with experience and identity, move vercel-react-best-practices skills to .agents directory. #### ✨ Features - **database**: Added user memory activity. - **desktop**: Add legacy local database detection and migration guidance. - **misc**: Add platform-aware download client menu option, add server version check for desktop app, remove Clerk authentication code, skill setting page and skill store, support agent group unpublish agents, support client tasks mode, update the sandbox preinstall libs in sys role. #### 🐛 Bug Fixes - **copilot**: Pass correct scope when creating new session in PageEditor. - **desktop**: Gracefully handle missing update manifest 404 errors. - **model-runtime**: Filter unsupported image types (SVG) before sending to vision models. - **pdf**: Upgrade pdfjs-dist and react-pdf to v5.x. - **sidebar-drawer**: Fix drawer positioning and title style. - **misc**: Fix group broadcast trigger tool use, fix local system tools, fix memory schema, fix multi agent tasks issue, fix multi tasks no summary issue, fix scope issue, fix tool argument scape and improve multi task run, fixed the sandbox tools call when error should use right callback, improve e2e server and complete i18n resources, slove the agent group editor not focus in editdata area, slove the agents header switch agents the lobeAI not show problem, sloved the old removeSessionTopics not work, TypewriterEffect not refreshing on language change, updata cron job ui & fixed commnuity pagenation goto error, update the agentbuilder tools not always use humanIntervention. #### 💄 Styles - **misc**: Improve auto scroll and group profile, update og, update share style. <br/> <details> <summary><kbd>Improvements and Fixes</kbd></summary> #### Code refactoring * **auth**: Remove NEXT_PUBLIC_AUTH_URL env variable, closes [lobehub#11658](https://github.com/jaworldwideorg/OneJA-Bot/issues/11658) ([c0f9875](c0f9875)) * **model-select**: Migrate FunctionCallingModelSelect to LobeSelect, closes [lobehub#11664](https://github.com/jaworldwideorg/OneJA-Bot/issues/11664) ([ad51305](ad51305)) * **ModelSwitchPanel**: Migrate from Popover to DropdownMenu with virtual scrolling, closes [lobehub#11663](https://github.com/jaworldwideorg/OneJA-Bot/issues/11663) ([c9d9dff](c9d9dff)) * **userMemories**: Removed un-used code, closes [lobehub#11713](https://github.com/jaworldwideorg/OneJA-Bot/issues/11713) ([89750fc](89750fc)) * **misc**: Improve memory data with experience and identity, closes [lobehub#11717](https://github.com/jaworldwideorg/OneJA-Bot/issues/11717) ([bdb3eb4](bdb3eb4)) * **misc**: Move vercel-react-best-practices skills to .agents directory, closes [lobehub#11703](https://github.com/jaworldwideorg/OneJA-Bot/issues/11703) ([6df7731](6df7731)) #### What's improved * **database**: Added user memory activity, closes [lobehub#11680](https://github.com/jaworldwideorg/OneJA-Bot/issues/11680) ([0160fbd](0160fbd)) * **desktop**: Add legacy local database detection and migration guidance, closes [lobehub#11682](https://github.com/jaworldwideorg/OneJA-Bot/issues/11682) ([5664b84](5664b84)) * **misc**: Add platform-aware download client menu option, closes [lobehub#11676](https://github.com/jaworldwideorg/OneJA-Bot/issues/11676) ([55abddc](55abddc)) * **misc**: Add server version check for desktop app, closes [lobehub#11710](https://github.com/jaworldwideorg/OneJA-Bot/issues/11710) ([0cf2723](0cf2723)) * **misc**: Remove Clerk authentication code, closes [lobehub#11711](https://github.com/jaworldwideorg/OneJA-Bot/issues/11711) ([395595a](395595a)) * **misc**: Skill setting page and skill store, closes [lobehub#11665](https://github.com/jaworldwideorg/OneJA-Bot/issues/11665) ([d8c0c26](d8c0c26)) * **misc**: Support agent group unpublish agents, closes [lobehub#11687](https://github.com/jaworldwideorg/OneJA-Bot/issues/11687) ([4e060be](4e060be)) * **misc**: Support client tasks mode, closes [lobehub#11666](https://github.com/jaworldwideorg/OneJA-Bot/issues/11666) ([98cf57b](98cf57b)) * **misc**: Update the sandbox preinstall libs in sys role, closes [lobehub#11688](https://github.com/jaworldwideorg/OneJA-Bot/issues/11688) ([404c577](404c577)) #### What's fixed * **copilot**: Pass correct scope when creating new session in PageEditor, closes [lobehub#11714](https://github.com/jaworldwideorg/OneJA-Bot/issues/11714) ([0259270](0259270)) * **desktop**: Gracefully handle missing update manifest 404 errors, closes [lobehub#11625](https://github.com/jaworldwideorg/OneJA-Bot/issues/11625) ([13e95b9](13e95b9)) * **model-runtime**: Filter unsupported image types (SVG) before sending to vision models, closes [lobehub#11698](https://github.com/jaworldwideorg/OneJA-Bot/issues/11698) ([c0c99a7](c0c99a7)) * **pdf**: Upgrade pdfjs-dist and react-pdf to v5.x, closes [lobehub#11686](https://github.com/jaworldwideorg/OneJA-Bot/issues/11686) ([2b620df](2b620df)) * **sidebar-drawer**: Fix drawer positioning and title style, closes [lobehub#11655](https://github.com/jaworldwideorg/OneJA-Bot/issues/11655) ([cf5320e](cf5320e)) * **misc**: Fix group broadcast trigger tool use, closes [lobehub#11646](https://github.com/jaworldwideorg/OneJA-Bot/issues/11646) ([831a9b3](831a9b3)) * **misc**: Fix local system tools, closes [lobehub#11702](https://github.com/jaworldwideorg/OneJA-Bot/issues/11702) ([6548fc7](6548fc7)) * **misc**: Fix memory schema, closes [lobehub#11645](https://github.com/jaworldwideorg/OneJA-Bot/issues/11645) ([3baf780](3baf780)) * **misc**: Fix multi agent tasks issue, closes [lobehub#11672](https://github.com/jaworldwideorg/OneJA-Bot/issues/11672) ([9de773b](9de773b)) * **misc**: Fix multi tasks no summary issue, closes [lobehub#11685](https://github.com/jaworldwideorg/OneJA-Bot/issues/11685) ([26ce317](26ce317)) * **misc**: Fix scope issue, closes [lobehub#11719](https://github.com/jaworldwideorg/OneJA-Bot/issues/11719) ([17adde8](17adde8)) * **misc**: Fix tool argument scape and improve multi task run, closes [lobehub#11691](https://github.com/jaworldwideorg/OneJA-Bot/issues/11691) ([b13bb8a](b13bb8a)) * **misc**: Fixed the sandbox tools call when error should use right callback, closes [lobehub#11721](https://github.com/jaworldwideorg/OneJA-Bot/issues/11721) ([e8fce68](e8fce68)) * **misc**: Improve e2e server and complete i18n resources, closes [lobehub#11678](https://github.com/jaworldwideorg/OneJA-Bot/issues/11678) ([d450dd9](d450dd9)) * **misc**: Slove the agent group editor not focus in editdata area, closes [lobehub#11677](https://github.com/jaworldwideorg/OneJA-Bot/issues/11677) ([9ac84e6](9ac84e6)) * **misc**: Slove the agents header switch agents the lobeAI not show problem, closes [lobehub#11726](https://github.com/jaworldwideorg/OneJA-Bot/issues/11726) ([f45f508](f45f508)) * **misc**: Sloved the old removeSessionTopics not work, closes [lobehub#11671](https://github.com/jaworldwideorg/OneJA-Bot/issues/11671) ([06d41e5](06d41e5)) * **misc**: TypewriterEffect not refreshing on language change, closes [lobehub#11657](https://github.com/jaworldwideorg/OneJA-Bot/issues/11657) ([ba30f46](ba30f46)) * **misc**: Updata cron job ui & fixed commnuity pagenation goto error, closes [lobehub#11700](https://github.com/jaworldwideorg/OneJA-Bot/issues/11700) ([42ad2a0](42ad2a0)) * **misc**: Update the agentbuilder tools not always use humanIntervention, closes [lobehub#11696](https://github.com/jaworldwideorg/OneJA-Bot/issues/11696) ([0d3017b](0d3017b)) #### Styles * **misc**: Improve auto scroll and group profile, closes [lobehub#11725](https://github.com/jaworldwideorg/OneJA-Bot/issues/11725) ([550acc2](550acc2)) * **misc**: Update og, closes [lobehub#11709](https://github.com/jaworldwideorg/OneJA-Bot/issues/11709) ([01cf4e4](01cf4e4)) * **misc**: Update share style, closes [lobehub#11716](https://github.com/jaworldwideorg/OneJA-Bot/issues/11716) ([3c70dfa](3c70dfa)) </details> <div align="right"> [![](https://img.shields.io/badge/-BACK_TO_TOP-151515?style=flat-square)](#readme-top) </div>

dosubot bot added the size:L This PR changes 100-499 lines, ignoring generated files. label Jan 22, 2026

dosubot bot added the 🐛 Bug label Jan 22, 2026

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vercel bot deployed to Preview January 22, 2026 06:53 View deployment

arvinxx merged commit c0c99a7 into next Jan 22, 2026
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arvinxx deleted the fix/filter-unsupported-image-types branch January 22, 2026 09:39

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🐛 fix(model-runtime): filter unsupported image types (SVG) before sending to vision models#11698

🐛 fix(model-runtime): filter unsupported image types (SVG) before sending to vision models#11698
arvinxx merged 1 commit intonextfrom
fix/filter-unsupported-image-types

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Sequence diagram for Anthropic image_url handling with MIME-type filtering

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TestGru Assignment

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💡 Codex Review

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Codecov Report

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2 participants

arvinxx commented Jan 22, 2026 •

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