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Starts when · Starts a flow

When we try to place a block

Starts when we try to place a block, to see if we can build it here or not.

Basic plan m.on.block_can_build

In a flow

“When we try to place a block, the steps wired after it run.”

When we try to place a block → Broadcast {trigger.hand}

What it does

Starts when we try to place a block, to see if we can build it here or not. It starts a flow, and gives the steps after it values about what happened. It gives 5 values later steps can use. Find it under Starts when in the palette.

When to use it

Use it to start a flow when we try to place a block.

When not to

If the flow should start from a click or a command instead, pick that trigger: a flow has exactly one.

Typical wiring

When we try to place a block Reply

Values it gives

Player Player

The player it's about. Wire it into any Player pin. e.g. Alex

If it's empty: Empty when the step didn't make one (it stopped early or was skipped); steps reading it get nothing.

Connects toAccept application Add a forum tag Add a label Add a Notion page Add a row to a Google Sheet Add a staff note Add a sticker Add a Trello cardand 554 more

Block Block

The block of the block can build. e.g. Stone

If it's empty: Empty when the step didn't make one (it stopped early or was skipped); steps reading it get nothing.

Connects toAccept application Add a forum tag Add a label Add a Notion page Add a row to a Google Sheet Add a staff note Add a sticker Add a Trello cardand 554 more

Hand Text

The hand of the block can build. e.g. minecraft:stone

If it's empty: Empty when the step didn't make one (it stopped early or was skipped); steps reading it get nothing.

Connects toAccept application Add a forum tag Add a label Add a Notion page Add a row to a Google Sheet Add a staff note Add a sticker Add a Trello cardand 578 more

Is buildable Yes / no

The is buildable of the block can build. e.g. true

If it's empty: Empty when the step didn't make one (it stopped early or was skipped); steps reading it get nothing.

Connects toAdd a forum tag Add onboarding question Add to a counter Alarms that are due And AutoMod: Discord's word lists Bluesky latest post Board as emojiand 573 more

Material Text

The material of the block can build. e.g. minecraft:stone

If it's empty: Empty when the step didn't make one (it stopped early or was skipped); steps reading it get nothing.

Connects toAccept application Add a forum tag Add a label Add a Notion page Add a row to a Google Sheet Add a staff note Add a sticker Add a Trello cardand 578 more

Often next

Related in Starts when

Wires and sockets · Data values · Plans