- Add 2s deduplication window to prevent rate limit counter inflation from concurrent 429s
- Separate cooldown system from rate limits for non-429 errors (auth failures, 5xx)
- Add quota_fallback config option for automatic quota switching on rate limit
- Add toast notification for 400 'Prompt is too long' errors guiding users to /compact
- Add 5 new cooldown unit tests
- Enhance regression test suite with concurrent test infrastructure
- Add comprehensive rate limit analysis documentation
- Add test-models.ts for validating all supported model endpoints
- Add test-regression.ts for multi-turn regression testing (Issue #50)
- Consolidate Gemini 3 Flash variants (low/medium/high) into single model
- Fix schema structure by flattening nested signature_cache properties
- Extract streaming transformer utilities to dedicated module
- Add tool hardening for Claude models with parameter signature injection
and system instruction prepending (configurable via claude_tool_hardening)
- Add context error detection (prompt_too_long, tool_pairing) with toast
notifications to guide users on recovery actions
- Improve session recovery to handle cases where messageID isn't provided
by fetching and finding the latest assistant message
- Change empty schema placeholder from reason (string) to _placeholder
(boolean) to reduce token usage
- Add duplicate injection prevention for parameter signatures and tool
hardening instructions
- Fix cache key to strip tier suffix from model name (e.g., -high, -low)
preventing cache misses on tier change
- Add thoughtsTokenCount to usage metadata extraction
- Extract and export applyToolPairingFixes helper for centralized tool
pairing logic
- Add comprehensive tests for recovery error detection and request helpers
- Add 'antigravity-' prefix to route to Antigravity quota
- Models without prefix route to Gemini CLI quota
- Claude/GPT models auto-route to Antigravity (only available there)
- Gemini 3 tiers: Pro supports low/high, Flash supports minimal/low/medium/high
- Add thinkingLevel param for Gemini CLI, keep tier in model name for Antigravity
Resolves#51
