Adds zhipuai as a new provider using the OpenAI-compatible API at
api.z.ai. Supports api_key config or ZHIPUAI_API_KEY env var, with
optional endpoint override.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Two issues prevented the GitHub Models fallback from working:
1. The X-GitHub-Api-Version: 2022-11-28 header caused '400 invalid
apiVersion' errors. The Copilot chat completions endpoint does not
use this header — removed from both constructor and rebuildClient.
2. The anthropicToGitHubModel mapping was incomplete: it only knew
three models and the generic date-stripping fallback produced wrong
names (e.g. 'claude-sonnet-4-5' instead of 'claude-sonnet-4.5').
GitHub Copilot uses dots for sub-versions, not hyphens.
Updated with explicit mappings for all current models (sonnet 4,
4.5; opus 4, 4.5, 4.6; haiku 4.5) and a smarter generic fallback
that converts digit-hyphen-digit to digit.digit at the end.
3. createClientFromConfig now auto-maps Anthropic-style model names
when the provider is 'github', so users can copy model names from
their Anthropic config into fallback blocks without manual renaming.
When a tier uses the Anthropic provider and has no user-configured inline
fallback, automatically insert a GitHub Models client for the equivalent
model as a tier fallback. This ensures the same model is tried via an
alternative provider before degrading to the global fallback chain (which
may be a much weaker local model).
Mapping: claude-sonnet-4-20250514 → claude-sonnet-4, etc.
Add native GeminiClient using @google/generative-ai SDK and BedrockClient
using @aws-sdk/client-bedrock-runtime. Replace the previous Gemini fallback
(OpenAI-compatible shim) with the real implementation. Add OpenRouter as a
provider option (OpenAI-compatible with custom baseURL). Update model costs,
doctor CLI checks, and client factory tests.
- Extract createClientFromConfig() to dispatch on provider field instead
of hardcoding all tiers as AnthropicClient
- Add fallback/fallbackReason metadata to ChatResponse and ChatStreamEvent
so callers know when a fallback model was used
- Enhance doctor check to report full model stack and warn on missing
API keys for cloud providers
- Log fallback warnings in NativeAgent and display them in TUI
- Support tier names and local_providers entries in fallback_chain
- Add 8 tests for createClientFromConfig covering all provider types
William Valentin