Rename src/llm/meta.py to src/llm/hugging_face.py

Update src/llm/meta.py

Update src/llm/__init__.py

Update src/llm/anthropic.py

Update llama model name

Update model support:

feat: switch to stable workhorse models (gpt-4.1, sonnet-4-6, gemini-2.5-flash)

fix: handle GPT-5 restricted parameters (no temperature, developer role)

fix: use max_completion_tokens for GPT-5 (replaces deprecated max_tokens)

feat: upgrade to GPT-5 series, increase default max_tokens to 8192

fix: Round 14 — 28 Tier 1 + Tier 2 bugs fixed across 17 source files

fix: pre-release audit round 12 — 33 bugs fixed across all tiers

fix: curated model lists, reasoning model token scaling, skip temp files

fix: pre-release audit round 9 — anti-hallucination hardening + error handling

fix: Round 8 audit — 15 bugs fixed across 10 files (1 CRITICAL, 7 HIGH, 3 MEDIUM, 4 LOW)

fix: 10 bugs (4 HIGH + 6 MEDIUM) from comprehensive codebase audit

fix: 6-agent debug audit — 8 bugs fixed across codebase

fix: harden codebase against format injection, empty responses, and unsafe config access

fix: use .get() for all config access + add CLAUDE.md and docs to repo

Initial commit: RAG Research Chatbot Template