* fix(agent): provider-aware fallback for haiku/sonnet aliases
Explore agent fails on custom providers (Z.AI GLM, Alibaba Anthropic-compatible,
local OpenAI endpoints) because 'haiku' alias resolves to a non-existent model.
Changes:
- Add isClaudeNativeProvider check (Bedrock, Vertex, Foundry, official Anthropic)
- For non-Claude-native providers, haiku/sonnet aliases inherit parent model
- Add 8 tests for provider-aware fallback behavior
Fixes Explore agent "model not found" errors on custom Anthropic-compatible APIs.
* test(agent): use Bun mock.module() for provider tests
Replace env manipulation with proper Bun mock.module() to reliably
mock getAPIProvider() and isFirstPartyAnthropicBaseUrl() functions.
This ensures tests work correctly on CI where module caching caused
false negatives.
---------
Co-authored-by: Ali Alakbarli <ali.alakbarli@users.noreply.github.com>
Squash the current repository state back into one baseline commit while
preserving the README reframing and repository contents.
Constraint: User explicitly requested a single squashed commit with subject "asdf"
Confidence: high
Scope-risk: broad
Reversibility: clean
Directive: This commit intentionally rewrites published history; coordinate before future force-pushes
Tested: git status clean; local history rewritten to one commit; force-pushed main to origin and instructkr
Not-tested: Fresh clone verification after push
