# Bind → conjure → meld

<sub>**Beginner.** Three verbs, one order.</sub>

**Excerpt.** `Config` and `Server` are your application classes. Start with a
fresh book, register both, and conjure once; the final line returns a `Server`.

```python
book = md.Spellbook()

# 1. bind everything
book.bind(spell=Config, existence="unique")
book.bind(spell=Server, existence="many")

# 2. conjure ONCE  ← compiles + validates the entire graph
conduit = book.conjure()

# 3. meld everywhere
server = conduit.meld("Server")
```

**`conjure()` prepares the registered graph.** Requirements extraction, graph
construction, cycle detection, and runtime compilation run there. Cycles and
ambiguous providers refuse startup. A typed parameter with no provider can be
supplied at `meld(override={...})`; omitting it when construction needs it raises
`UnresolvedInputError`. Ordinary Python parameter defaults remain defaults.

> **One book, one conjure.** A Spellbook produces exactly one conduit, ever.
> More scopes? `create_lesser_conduit()`. Another root? Another book.

## Runnable examples

- [The basic rhythm](../examples/beginner/21-the-basic-rhythm.md) — Beginner 21
- [One book one conduit](../examples/beginner/36-one-book-one-conduit.md) — Beginner 36

[All beginner examples](../examples/beginner/index.md) · [Level contents](index.md) · [Full contents](../contents.md)

[Canonical page source](https://github.com/Synaptic724/melder/blob/90d52e0a12cb0743d62568d5a19ce954a54443bc/README.md)