Install four MCP servers globally in the claude image:
@modelcontextprotocol/server-github → mcp-server-github
@yoda.digital/gitlab-mcp-server → gitlab-mcp-server
@aashari/mcp-server-atlassian-jira → mcp-atlassian-jira
@aashari/mcp-server-atlassian-confluence → mcp-atlassian-confluence
Wire them in managed-settings.json via mcpServers with env var
pass-through. Jira and Confluence share ATLASSIAN_* credentials.
Add api.github.com, .gitlab.com, .atlassian.net to the squid
allowlist. All credentials are optional — servers are skipped
if the relevant env vars are unset.