[BUG] MCP tool calls in CCR Routines fail with "requires approval" — no approval UI shown, reconnect does not resolve

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

MCP tool calls made inside a Claude Code Routine (automated, non-interactive CCR session) consistently fail with:

Streamable HTTP error: Error POSTing to endpoint: MCP tool call requires approval

The Anthropic CCR proxy (api.anthropic.com/v2/ccr-sessions/{id}/mcp) returns this error on every call.

Since Routines have no interactive user present, no approval UI can appear — and indeed none appears. Disconnecting and reconnecting the MCP connectors (Heptabase) does not resolve the issue. The MCP config file (/tmp/mcp-config-{session_id}.json) is correctly generated with valid server IDs and proxy URLs.

What Should Happen?

MCP connectors that have been authorized in claude.ai settings should work in Routines without requiring per-call interactive approval. This was the behavior until recently.

Error Messages/Logs

Steps to Reproduce

1. In claude.ai/code, configure a Routine that calls MCP tools (e.g. Heptabase get_journal_range, Notion notion-create-pages)
2. Ensure the MCP connectors are connected (OAuth authorized) in claude.ai settings
3. Trigger the Routine
4. Observe that every MCP tool call fails with MCP tool call requires approval
5. No approval UI appears anywhere in the browser
6. Disconnecting and reconnecting the MCP connector does not fix the issue
7. The same MCP tools work correctly in local Claude Code CLI with the same OAuth-authorized connections

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.146

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

_No response_