# Frame posture public door

**🟠 Advanced · Lesson 03**

Frame POSTURE through the public door. configure_aether_frame() is the manual fluent path: set the world's system_state BEFORE anyone conjures, and every conjure then INHERITS it - no dynamic=True flag needed anywhere (the settle-then-inherit law from intermediate 21, driven from the configuration side this time). The posture FREEZES at the first conjure: configuring after that refuses - a world's mode is decided once.

## Before you run

Use the [Advanced guide](../../advanced/index.md) for prerequisite concepts. Run from a checkout with Melder installed and Python 3.14 free-threading selected. The collection download includes the level's local helper modules.

## Run the saved script

```bash
python UX_and_AIX_experiences/03_advanced/03_frame_posture_public_door.py
```

```powershell
py -3.14t UX_and_AIX_experiences/03_advanced/03_frame_posture_public_door.py
```

{download}`Download this collection <../../downloads/advanced-examples.zip>` · [Source on GitHub](https://github.com/Synaptic724/melder/blob/0895ce795453cd87e35d70665957b4e89aad3317/UX_and_AIX_experiences/03_advanced/03_frame_posture_public_door.py)

## Public surface

Spellbook(aetheric_frame=...),
                   configure_aether_frame(system_state=...),
                   plain-conjure inheritance, the freeze law

## Code

```{literalinclude} ../../downloads/03_advanced/03_frame_posture_public_door.py
:language: python
:linenos:
```

## Check the outcome

The script contains its own assertions or demonstrated refusal paths. Run it to evaluate those checks against your installed version. The code above is taken directly from the saved file; no run output is invented here.

[More advanced examples](index.md) · [Level guide](../../advanced/index.md)

## Related guides

- [World posture and configuration](../../advanced/posture.md)

## API contracts

- [Spellbook](../../reference/api/binding/spellbook.md)