Remote Trigger (Scheduled Agent): MCP cloud connectors not loaded in execution environment

Bug Description

MCP cloud connectors (Slack, Notion) specified in Remote Trigger mcp_connections are not being loaded in the execution environment. Only MCP servers defined in the repository's .mcp.json are available.

Environment

• Claude Code CLI (macOS)
• Remote Triggers (Scheduled Agents) via claude.ai

Steps to Reproduce

1. Create a Remote Trigger with mcp_connections referencing cloud connectors (e.g., Slack, Notion):

``json
"mcp_connections": [
{"connector_uuid": "xxx", "name": "notion", "url": "https://mcp.notion.com/mcp"},
{"connector_uuid": "xxx", "name": "Slack", "url": "https://mcp.slack.com/mcp"}
]
``

1. The trigger also references a git repository source that has a .mcp.json with other MCP servers (e.g., context7, deepwiki).
2. Run the trigger (either scheduled or manual via API).

Expected Behavior

The execution environment should have access to:

• MCP servers from the repository's .mcp.json (e.g., context7, deepwiki)
• MCP cloud connectors from mcp_connections (e.g., Slack, Notion)

Actual Behavior

Only MCP servers from the repository's .mcp.json are loaded:

• ✅ context7 (from .mcp.json) — available
• ✅ deepwiki (from .mcp.json) — available
• ❌ Slack cloud connector — not available
• ❌ Notion cloud connector — not available

The agent reports:

Slack・NotionのMCPツールがこの環境に設定されていません。現在利用可能なMCPサーバーは以下のみです: context7, deepwiki

Additional Context

• This was working until 2026-03-31. The same trigger successfully used Slack and Notion MCP connectors daily from 2026-03-24 to 2026-03-31.
• Broke on 2026-04-01. No configuration changes were made on our side.
• Connectors are properly authorized in claude.ai/settings/connectors.
• Newly created triggers with the same connector configuration also fail — this is not specific to old triggers.
• The trigger's enabled field is true and next_run_at is correctly scheduled.
• Manual runs via POST /v1/code/triggers/{id}/run also reproduce the issue.

Workaround

Currently running the same task locally via Claude Code CLI where MCP connectors work correctly.