Live-test revealed a regression in PR #24's setup() strip: the wheel-
default `anthropic:claude-opus-4-7` paired with an OAuth workspace
(CLAUDE_CODE_OAUTH_TOKEN set, no ANTHROPIC_API_KEY) is the realistic
production shape. Stripping in setup() routes those users into the
`anthropic-api` provider entry, after which the CLI hangs at
`initialize` because no API key env is set. Caught on workspace
dd40faf8 on 2026-05-01 — banner went `provider=anthropic-api` and
A2A wedged on Control request timeout.
Pre-fix routing (let prefixed strings fall through to providers[0] =
anthropic-oauth) is actually correct for this combo. The strip is only
needed at the CLI invocation site (create_executor) where claude's
`--model` arg must be a bare id.
Tests: replace `test_setup_strip_routes_prefixed_anthropic_to_anthropic_api`
with `test_setup_keeps_prefix_routing_oauth_for_anthropic_prefix`,
which pins the inverse — prefixed model + OAuth env stays on oauth and
emits no API-key warning. The 5 unit cases on `_strip_provider_prefix`
plus the `create_executor` strip pins remain unchanged. 36/36 pass.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
a78626ced4