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title: What 1.12.0 fixed
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parent: English
nav_order: 1034
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# What 1.12.0 fixed
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**As of 2026-07-25.** A snapshot; follow the links for whatever changed since.

**Nothing to configure** — upgrading is enough. No new features here: every item is something that was quietly broken.

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## A crash can no longer destroy your configuration

Saving `config.json` was not atomic, so a crash mid-write left a half-written file. The next boot read that as corrupt, and the lenient loader turns corrupt into **an empty config** — every provider, launcher and header button, gone. Writes are atomic now: a failure leaves **the previous file in place**.

If this happened to you, set things up again with the [configuration guide](config.html).

## API tokens outlived their sessions

A session's settings file holds **the provider's API token**. Cleanup only ran on a clean exit, so after a crash the token survived the session — survived being rotated, survived the provider being removed. Boot now prunes settings files with no surviving session.

**Worth upgrading for if you use a provider.** → [Using another model](providers.html)

## The phone link recovers instead of dying quietly

The Firestore command channel gave up **permanently** after a sleep or a network change, while the toolbar kept showing the last state it happened to fetch — so the only symptom was the phone failing to connect. It reconnects now. → [Using MulmoTerminal from your phone](phone.html)

## Windows: four silent failures

- **A config file saved on Windows read as no config at all.** Notepad and PowerShell write a UTF-8 BOM; JSON parsing failed on character one, and colors, badges, buttons and model settings were dropped with nothing displayed. The BOM is stripped now.
- **DOS device names** (`CON`, `NUL`, …) reached the file routes. `NUL` read empty; **`CON` hung the request** until console input arrived.
- **Deleting a locked file threw**, stopping cleanup partway.

Windows-specific traps are collected in [`docs/windows-gotchas.md`](https://github.com/receptron/mulmoterminal/blob/main/docs/windows-gotchas.md).

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[Changelog](https://github.com/receptron/mulmoterminal/blob/main/docs/ChangeLog.md) / [What's new in 2.0.0](v2.0.0.html)
