Probably Stolen Mods Guide: The 10 December Modding API Update
What Probably Stolen's 10 December 2026 modding API security merge changes, how to check which mods may break, where mods come from, and why this page does not host downloads or trainer guides.
What the 10 December update is
The 100-Rev13 hotfix on 8 November 2026 says a major modding API security update is planned and will be fully merged on 10 December.OfficialThe same post tells modders to check the updated Modding API documentation and update their mods before that date. This is a security change to how mods load, not a content update.
Timeline:
| Date | Build | Mod-related change |
|---|---|---|
| 28 October 2026 | 1.0 launch | Steam Workshop, the official Mod API and the in-game Mods menu ship |
| 31 October 2026 | 1.0.0.6 | Modding system security update; the developer warns some mods may break |
| Around 7 November 2026 | 1.0.0.12 | Cumulative update focused on features and fixes |
| 8 November 2026 | 100-Rev13 | Announces the full modding API security merge on 10 December |
| 10 December 2026 | TBD | Security merge completes; older mods may need author updates |
This is a patch date, not a content date
10 December does not automatically bring new gameplay. It is the merge date for the modding API security update. Treating it as a content release sets the wrong expectation.
Which mods may break
The developer has not published a list. The mechanism is what matters: if a mod hooks code changed by the security update, the hook can break.
Higher-risk types:
- Mods that change core game logic
- Old packs that replace DLLs or use an external loader
- Mods last updated before 1.0.0.6
Do not install demo-era packs
Mods made for the demo are incompatible with 1.0. They often ship with a MelonLoader folder and loose DLLs. Treat that structure as a demo mod and keep it out of the 1.0 install directory. Installation and Traditional Chinese mod details are in the Traditional Chinese and mods page.
How to prepare before 10 December
How to check compatibility
Check in this order:
- Build number: does the mod page list 1.0.0.13 or a build after 10 December?
- Last update: anything last touched before 1.0.0.6 is the highest risk.
- Install method: Workshop subscriptions are simplest. Manual files need checking for duplicates against a subscribed version.
- Conflicts: two mods that work alone can still conflict. Disable everything, then enable one at a time.
- Save dependencies: custom items can remain after a mod is removed. Sell or delete them first.
Where mods come from
1.0 officially supports Steam Workshop and the official Mod API, with an in-game Mods menu.Official- Steam Workshop: the official channel. Subscribe, then enable in the in-game Mods menu.
- Nexus: players report Traditional Chinese and gameplay mods there, but versions may lag. Check the supported build yourself.
- Official Modding API documentation: the reference for mod authors, and the thing to check before 10 December.
This site does not host mod files or trainer downloads.
Trainers are out of scope
Trainers such as Fengling Yueying are third-party tools, not part of the official Mod API. This site does not provide downloads or installation guidance. The risks:
- Save corruption
- Conflicts with mods or anti-cheat
- Breakage or abnormal behaviour after a game update
If you only want to know what a trainer is, see the trainer explainer.
Read next
- Installation and Traditional Chinese: Traditional Chinese and Mods
- Save backups: Save File and Crash Fixes
- What 1.0 changed: Release Details and 1.0 Features
Frequently Asked Questions
What happens on 10 December?
The developer says a major modding API security update will be fully merged that day. Modders need to check the updated documentation and update their mods before the deadline, and players may see older mods break.
Which mods will break?
The developer has not published a list. Any mod that hooks code changed by the security update can break. Check each mod page for support after 10 December.
How do I check whether a mod still works?
Check the author page for the last update, supported build and changelog. Test it on a disposable save first, then return to your main save.
Are Workshop and Nexus mods the same?
Not necessarily. 1.0 officially supports Steam Workshop and the official Mod API. Nexus versions are usually manual installs and may lag behind. Only the Workshop is confirmed as the official channel here.
Can I use a trainer like Fengling Yueying?
This site does not provide trainer downloads or installation guidance. Trainers are third-party tools that can damage saves, conflict with mods or trigger anti-cheat, and the risk is yours.
Related guides
Probably Stolen Traditional Chinese & Mods: Setup & 1.0.0.6 Fixes
How to play Probably Stolen in Traditional Chinese with the verified Workshop localisation mod, how 1.0's official Mod API differs from demo-era packages, and the safe install order: back up the save, add one mod, test on a throwaway save, then go back to the main run.
Probably Stolen Trainer Explained: What 风灵月影 Means & the Risks
What Chinese players mean when they search for 风灵月影 in Probably Stolen, why the term spikes after a launch, the practical risks of third-party trainers — save damage, version mismatch, achievements and unknown files — and the in-game routes that solve the same problems without them. No downloads and no install instructions.
Probably Stolen Best Starting Scenario: How to Pick All 9 Backgrounds
How to choose a Probably Stolen starting scenario by goal: first run, low-maintenance production, high profit with inspections, high turnover or a challenge run. No official power ranking exists, and starting money is not published.
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