# `__configinfo`: file map and service atom

## Proven map

The decoded `E__configinfo` text contains logical file-name pairs:

```text
"<object-guid>.0",<base64 of 20-byte SHA-1>
```

The Base64 value is the SHA-1 of the complete raw `BinaryData` stream for that
logical file. Updating a module without replacing this map value produces the
Configurator error “Ошибка хеш-версии файла конфигурации”.

The map rewrite is deterministic and losslessly round-trip proven for the
studied extension form module.

## Service atom: current status

The root block also contains three observed binary atoms: two 48-byte values
and a 32-byte value. The 32-byte value changed across manual saves, including
when the module bytes returned exactly to a previous SHA-1. A random mutation
of its variable part triggered a platform licensing/crypto error.

Therefore:

- preserve all service atoms byte-for-byte during the proven incremental
  protocol;
- do not synthesise, randomise, zero, or “recalculate” them;
- do not claim their reverse codec is known;
- record new observations in an experiment file before changing this rule.

The `test2` map-update experiment activated successfully while preserving the
existing service atom. This is activation evidence for preservation, not for
generation.