# Aider: known issues context pack (KnownFix)
Generated 2026-10-26T10:18:14Z from github.com/Aider-AI/aider. Auto-extracted; verify via links. Source: https://knownfix.ai/issues/aider/
Fields: severity (auto-estimate) | symptom | versions mentioned | workaround (quoted from issue/comments, if any) | fixed-in (if referenced).

## Active
- [HIGH] MCP SUPPORT (https://github.com/Aider-AI/aider/issues/3314)
  - symptom: Is there plane to add mcp server call?
  - error: `A. Forcing the user to manually copy paste documentation, either into the context window, or into local project files`
  - workaround: none stated
- [MEDIUM] Generated code can read SSH private keys outside the project directory without warning (https://github.com/Aider-AI/aider/issues/5076)
  - symptom: I would like to report a security-relevant issue in Aider's code generation behavior around sensitive file access outside the project directory
  - error: `ssh_key_path = os.path.expanduser("~/.ssh/id_rsa")`
  - workaround: none stated
- [MEDIUM] aider-install installed but not found (https://github.com/Aider-AI/aider/issues/5882)
  - symptom: Installed python from Microsoft Store using Python Install Manager
  - versions: 0.2.0
  - error: `But then aider-install is not found.`
  - workaround: none stated
- [MEDIUM] Can't install on Ubntu 25.04 with Python 3.13 and pipx (https://github.com/Aider-AI/aider/issues/4340)
  - symptom: Since upgrading Ubuntu from 24.10 to 25.04 (and thus, from Python 3.12 to 3.13.3) , pipx install aider-chat fails with: /home/user/.local/state/pipx/log/cmd2025-07-1213.40.46piperrors.log contains thi
  - versions: 25.04, 24.10, 3.13.3
  - error: `Fatal error from pip prevented installation. Full pip output in file:`
  - workaround: As a workaround, you can try installing `aider-chat` using an earlier Python version managed by `pyenv`: [comment by @adr-39 (4 reactions)]
- [HIGH] BUG: callable `test_cmd` crashes `Coder.get_platform_info` with `TypeError` on the first message (https://github.com/Aider-AI/aider/issues/5876)
  - symptom: Commands.cmdtest supports a callable test command (testcmd), and Coder.create(..., testcmd=...) accepts one
  - versions: 0.86.0
  - error: `return "1 test failed" # a callable test command returns its error output`
  - workaround: none stated
- [HIGH] BUG: invalid `--assistant-output-color` is reset to `None`, then every pretty reply crashes in Rich and its edits are no (https://github.com/Aider-AI/aider/issues/5873)
  - symptom: InputOutput.validatecolorsettings() handles an invalid assistantoutputcolor by warning "Disabling this color." and setting the attribute to None
  - versions: 0.86.0
  - error: `# An invalid assistant_output_color is "disabled" to None, then every pretty reply crashes in Rich`
  - workaround: none stated
- [MEDIUM] segfault while listing models on 0.86.2 (https://github.com/Aider-AI/aider/issues/5776)
  - symptom: aider 0.86.2 installed freshly via pip in a venv
  - versions: 0.86.2
  - error: `Segmentation fault`
  - workaround: none stated
- [MEDIUM] Hexum hosted MCP for smaller coding-agent context? (https://github.com/Aider-AI/aider/issues/5719)
  - symptom: Hi Aider maintainers — Hexum offers a hosted MCP server at https://hexum.dev/mcp that shrinks coding-agent turn context, with optional architecture.hexum checks
  - workaround: none stated