github / github/github-mcp-server
Asking Dependabot to Rebase via MCP leads to malformed text in comment
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Description
### Describe the bug
`add_issue_comment` mangles @mentions in comment bodies by inserting Unicode middle dot characters (·) between letters. This causes bot commands (e.g. Dependabot's `@dependabot rebase`) to silently fail because the mention is unrecognized.
### Affected version
Version unknown; observed on June 16, 2026
### Steps to reproduce the behavior
1. In Claude Code, ask Claude to post `@dependabot rebase` as a comment on a GitHub PR via the `add_issue_comment` MCP tool.
2. Observe the resulting comment body on GitHub.
### Expected behavior
Comment body: `@dependabot rebase`
### Actual behavior
Comment body: `·@·d·ependabot r·ebase`
### Additional context
The issue reproduces consistently on repeated calls with the same input. The mangled text prevents Dependabot from recognizing the command.
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