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0dd373ec43
When a user sets model.context_length in config.yaml, the value was only used for Hermes' internal compression decisions (context_compressor) but NOT for Ollama's num_ctx parameter. Ollama auto-detects context from GGUF metadata (often 256K+) and allocates that much VRAM regardless of the user's config — causing OOM on smaller GPUs like the P100 (16GB). Root cause: two separate context values existed independently: - context_compressor.context_length = config value (e.g. 65536) ✓ - _ollama_num_ctx = GGUF metadata value (e.g. 256000) ✗ ignored config Changes: 1. Cap Ollama num_ctx to config context_length (run_agent.py) When model.context_length is explicitly set and no explicit ollama_num_ctx override exists, cap the auto-detected GGUF value to the user's context_length. This is the core fix — it prevents Ollama from allocating more VRAM than the user budgeted. 2. Pass config_context_length through all secondary call sites Several paths called get_model_context_length() without the config override, falling through to the 256K default fallback: - cli.py: @-reference expansion and /model switch display - gateway/run.py: @-reference expansion and /model switch display - tui_gateway/server.py: @-reference expansion - hermes_cli/model_switch.py: resolve_display_context_length() 3. Normalize root-level context_length in config (hermes_cli/config.py) _normalize_root_model_keys() now migrates root-level context_length into the model section, matching existing behavior for provider and base_url. Users who wrote `context_length: 65536` at the YAML root instead of under `model:` had it silently ignored. 4. Fix misleading comments (agent/model_metadata.py) DEFAULT_FALLBACK_CONTEXT is 256K (CONTEXT_PROBE_TIERS[0]), not 128K as two comments stated. Tests: 3 new tests for root-level context_length normalization. All existing context_length tests pass (96 tests).