Non-image file uploads missing in 0.7.9+

[relic664]

What happened?

Issue: I have no option to upload files outside of images. I have the rag pipeline set and relevant yaml configured. I've tried on both chromium and firefox and the issue persists for both (worth mentioning since there was a prior bug with firefox specifically). I tried passing ENDPOINTS="agents, assistants" as suggested in #8172, but the issue persists.

This relates to similar prior bugs #8245 and #8172.

Rolling back a few versions, in 0.7.9 the bug persists, but 0.7.8, the bug is no longer there. In 0.7.8 I have the full upload options menu. Further, with 0.7.8 I can upload files and store them. I can even use the files uploaded in 0.7.8 in 0.7.9+ successfully for RAG, but in 0.7.9+, I have no ability to upload new files.

Version Information

latest docker version (i.e., 0.8.0-rc1, librechat-dev:da3730b7d64a991d825253a6c9584c82ca9f9cf9)

Steps to Reproduce

Latest docker images for full rag api and librechat-dev. (In the yaml, I tried with and without a fileConfig, no change either way). This works fine in 0.7.8, but seems to break in 0.7.9+

librechat.yaml:

version: 1.2.8

interface:
  parameters: true
  agents: true
  fileSearch: true

...

endpoints:
  agents:
    disableBuilder: false
    capabilities:
      - "actions"
      - "tools"
  custom:
    - name: "LiteLLM"
      apiKey: "notused"
      baseURL: "http://host:port/v1"
      directEndpoint: true

      # UI sliders
      customParams:
        defaultParamsEndpoint: "openAI"
        paramDefinitions:
          - key: temperature
            range: { min: 0, max: 1, step: 0.05 }
            default: 0.6
          - key: top_p
            range: { min: 0, max: 1, step: 0.05 }
            default: 0.95
          - key: presence_penalty
            range: { min: -2, max: 2, step: 0.1 }
            default: 0.3
          - key: frequency_penalty
            range: { min: -2, max: 2, step: 0.1 }
            default: 0.2
          - key: web_search
            type: boolean
            label: "Web Search"
            default: false


      addParams:
        extra_body:
          chat_template_kwargs:
            enable_thinking: false

      models:
        fetch: false
        default: ["glm-45-air"]
      titleConvo: true
      titleModel: "glm-45-air"

...

modelSpecs:
  enforce: false
  prioritize: true
  list:
    - name: "glm-45-air"
      label: "GLM 4.5 Air"
      default: true
      preset:
        endpoint: "LiteLLM"
        model: "glm-45-air"

...

fileStrategy: "local"  

fileConfig:
  serverFileSizeLimit: 1000  
  endpoints:
    default:
      totalSizeLimit: 200     
      disabled: false
    LiteLLM:                  
      fileLimit: 5
      disabled: false
      fileSizeLimit: 50
      totalSizeLimit: 200
      supportedMimeTypes:
        - image/.*
        - application/pdf
        - text/.*
        - application/vnd.openxmlformats-officedocument.*   
        - application/msword
        - application/vnd.ms-excel
        - application/vnd.ms-powerpoint

What browsers are you seeing the problem on?

Firefox, Chrome, Mobile (Android)

Relevant log output

NPM

---

Error logs: Empty
Debug logs:

 2025-08-10T16:23:54.913Z info: RAG API is running and reachable at http://host:8000.

Docker

---

Error logs (I'm running in dev mode so this is expected):

{"code":"ENOENT","errno":-2,"level":"error","message":"Failed to load service key from file: /app/api/data/auth.json ENOENT: no such file or directory, open '/app/api/data/auth.json'","path":"/app/api/data/auth.json","stack":"Error: ENOENT: no such file or directory, open '/app/api/data/auth.json'\n    at Object.readFileSync (node:fs:449:20)\n    at /app/packages/api/dist/index.js:1:78039\n    at Generator.next (<anonymous>)\n    at /app/packages/api/dist/index.js:1:2191\n    at new Promise (<anonymous>)\n    at __awaiter (/app/packages/api/dist/index.js:1:1936)\n    at loadServiceKey (/app/packages/api/dist/index.js:1:77455)\n    at loadAsyncEndpoints (/app/api/server/services/Config/loadAsyncEndpoints.js:28:26)\n    at loadDefaultEndpointsConfig (/app/api/server/services/Config/loadDefaultEConfig.js:11:40)\n    at getEndpointsConfig (/app/api/server/services/Config/getEndpointsConfig.js:24:40)","syscall":"open"}

Debug logs (truncated for brevity, but the yaml is being read properly):

...

    // 7 supportedMimeType(s)
    LiteLLM.supportedMimeTypes: ["image/.*","application/pdf","text/.*","application/vnd.openxmlformats-officedocument.*","application/msword","application/vnd.ms-excel","application/vnd.ms-powerpoint"],
    supportedMimeTypes.0: "image/.*",
    supportedMimeTypes.1: "application/pdf",
    supportedMimeTypes.2: "text/.*",
    supportedMimeTypes.3: "application/vnd.openxmlformats-officedocument.*",
    supportedMimeTypes.4: "application/msword",
    supportedMimeTypes.5: "application/vnd.ms-excel",
    supportedMimeTypes.6: "application/vnd.ms-powerpoint",

Screenshots

Code of Conduct

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[relic664]

Skill issue on my end and an inability to read the docs.

There's two doc strings for endpoints.agents.capabilities

Defines the agent capabilities that are available to all users for the agents endpoint. You can omit the capabilities you wish to exclude from the list.

and

The capabilities field allows you to enable or disable specific functionalities for agents

What is really happening is endpoints.agents.capabilities acts as a capabilities whitelist for both "agents" and model endpoints. So if file_search isn't listed, it's blacklisted for both "agents" and just simple chat models.

Fix:

endpoints:
  agents:
    disableBuilder: false
    capabilities:
      - "actions"
      - "tools"
      - "file_search"