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feat: Add environment variables to override model context limits (#3260)

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Co-authored-by: dianed-square <73617011+dianed-square@users.noreply.github.com>
Co-authored-by: Angie Jones <jones.angie@gmail.com>
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dcieslak19973
2025-07-07 17:27:23 -05:00
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documentation/docs/guides/environment-variables.md
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@@ -117,6 +117,31 @@ export GOOSE_CONTEXT_STRATEGY=summarize
export GOOSE_CONTEXT_STRATEGY=prompt
```
### Context Limit Configuration
These variables allow you to override the default context window size (token limit) for your models. This is particularly useful when using [LiteLLM proxies](https://docs.litellm.ai/docs/providers/litellm_proxy) or custom models that don't match Goose's predefined model patterns.
| Variable | Purpose | Values | Default |
|----------|---------|---------|---------|
| `GOOSE_CONTEXT_LIMIT` | Override context limit for the main model | Integer (number of tokens) | Model-specific default or 128,000 |
| `GOOSE_LEAD_CONTEXT_LIMIT` | Override context limit for the lead model in [lead/worker mode](/docs/tutorials/lead-worker) | Integer (number of tokens) | Falls back to `GOOSE_CONTEXT_LIMIT` or model default |
| `GOOSE_WORKER_CONTEXT_LIMIT` | Override context limit for the worker model in lead/worker mode | Integer (number of tokens) | Falls back to `GOOSE_CONTEXT_LIMIT` or model default |
| `GOOSE_PLANNER_CONTEXT_LIMIT` | Override context limit for the [planner model](/docs/guides/creating-plans) | Integer (number of tokens) | Falls back to `GOOSE_CONTEXT_LIMIT` or model default |
**Examples**
```bash
# Set context limit for main model (useful for LiteLLM proxies)
export GOOSE_CONTEXT_LIMIT=200000
# Set different context limits for lead/worker models
export GOOSE_LEAD_CONTEXT_LIMIT=500000 # Large context for planning
export GOOSE_WORKER_CONTEXT_LIMIT=128000 # Smaller context for execution
# Set context limit for planner
export GOOSE_PLANNER_CONTEXT_LIMIT=1000000
```
## Tool Configuration
These variables control how Goose handles [tool permissions](/docs/guides/tool-permissions) and their execution.