Absorbs PR #2279's intent (drop the hardcoded ANTHROPIC_API_KEY gate) with
the end-state the gateway world actually wants: the patterns phase now
probes the RESOLVED patterns model through probeChatModel(normalizeModelId)
— the same semantics as think/index.ts and synthesize's makeJudgeClient.
Fixes two misclassifications of the old env gate:
- Non-Anthropic stacks (litellm, deepseek, openrouter, ...) were skipped as
"no upstream" even though the subagent routes them through the gateway
(agent.use_gateway_loop). They now pass the gate; their auth is checked
lazily at dispatch and surfaces in the job outcome.
- Anthropic keys set via `gbrain config set anthropic_api_key` (stdio MCP
launches without shell env) were treated as missing. hasAnthropicKey
inside probeChatModel reads both sources.
Skip reason renames no_api_key → no_provider (carrying the probe's detail).
Both pinning tests updated: the structural test asserts the probe wiring;
the PGLite E2E swaps its env-only helper for the shared hermetic
withoutAnthropicKey (env + config file) so it can't flip to a live LLM call
on a dev machine with a config-file key.
Co-authored-by: Sinabina <sinabina@Sinabinas-MacBook-Pro-4.local>
Co-authored-by: brettdavies <brettdavies@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
