FsmMaster for Silksong

A live PlayMaker FSM inspector and editor for Hollow Knight: Silksong. View any FSM in the game as an interactive graph, edit its states, variables, and transitions while the game runs, and save your edits to reapply them later.

Press Alpha0 to toggle the overlay, and Alpha1 to switch to a minimal graph-only view. Both are rebindable in-game via BepInEx's Configuration Manager.

For any questions or bug reports, please join the Modding Discord or Speedrunning Discord.

FsmMaster for Silksong

Features

Graphic, customizable UI with performance toggles for lower-end machines.
FSM editing and viewing with live information - watch states, variables, and transitions update in real time as the FSM actually runs.
Rebindable hotkeys via BepInEx's Configuration Manager.
Savestate support with DebugMod - active FSM edits are saved into and restored from savestates automatically.
Custom RNG sequencing - replace an FSM's random event picks with a fixed, ordered sequence you control.
Hidden variable editing, including variables PlayMaker doesn't normally expose in its own editor.
Monitoring panel compatible with multiple simultaneous FSMs.
Interactable graph - click and drag your way through an FSM's states, transitions, and events instead of reading raw data.
Custom config saving/loading, with optional auto-load on scene change.

Coming Soon

Adaptive RNG, to make practicing attacks faster based on what you're struggling with
Timer Mod integration, starting and stopping the timer based on Fsm values
Hollow Knight backport
Sequencers for more actions

Controls

Panel Controls

Open - choose an FSM to display.
Save - save edits to file.
Load - load edits from file.
Undo - undo last edit.
Reset - reset FSM to default.
Hide - hide graph.
Auto - load last saved file automatically upon scene change.

Graph Controls

Scroll Wheel - zoom.
Drag - pan.
Click - select a state, event, or transition.
Double Click - change states.
Right Click - disable a state or transition.
Click and Drag from a transition - retarget it to a different state.

State Panel

Edit most basic variable types directly.
Click the blue dot next to a variable to add it to the monitor panel.

Sequencer

Drag events to build a custom sequence, and rearrange them to replace an FSM's random event selection with a fixed pattern.

Installation

[!IMPORTANT] For moderation reasons, this mod requires Silksong.ModList to be installed. This mod is included in the release download. If Silksong.ModList is not installed, FsmMaster will silently fail to load.

FsmMaster can be installed via Cogfly, Thunderstore, or manually installed with the latest release download.

[!TIP] FsmMaster works standalone, but installing DebugMod alongside it gives you savestate support - active FSM edits are automatically captured and restored when you save or load a savestate. I recommend installing DebugMod for the best experience.

Credits

Core development - ConstructiveCynicism
Graph layout and FSM visualization conventions inspired by FSMExpress - nesrak1
Built on Silksong.FsmUtil and Silksong.DebugMod's savestate system

License

MIT