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dspy-fundamentals

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Write idiomatic DSPy 3.2.x programs — typed Signatures, dspy.Module subclasses, Predict/ChainOfThought/ReAct/ProgramOfThought, and save/load. Use this when starting any new DSPy project or when fixing non-idiomatic DSPy code (hard-coded prompts, ad-hoc string templates, untyped outputs, non-serializable classes).

skills/dspy-fundamentals/SKILL.md

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# DSPy Fundamentals (3.2.x)

DSPy is the "PyTorch for prompts" — you declare **Signatures** (typed I/O contracts), compose them into **Modules**, and let optimizers (not you) tune the instructions and few-shot examples. Never write raw prompts.

## The one-paragraph model

Configure a single LM globally with `dspy.configure(lm=...)`. Define a `dspy.Signature` subclass with `dspy.InputField()` / `dspy.OutputField()` (docstring becomes the instruction). Wrap it in a predictor — `dspy.Predict` (direct), `dspy.ChainOfThought` (adds reasoning), `dspy.ReAct` (tool-using agent), `dspy.ProgramOfThought` (code-executing), or `dspy.RLM` (long-context). Subclass `dspy.Module` to compose multi-step programs. For built-in providers, use `dspy.LM("provider/model")`; for a truly custom backend, subclass `dspy.BaseLM`. Optimize later with GEPA.

## Canonical template

```python
import dspy

dspy.configure(lm=dspy.LM("openai/gpt-4o"), track_usage=True)
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