Presets

Mica ships with bundled presets in presets/ and can load additional presets from directories listed in presets.extra_dirs.

Inspect Available Presets

mica presets

Apply and Remove

mica apply rust
mica unapply rust

Preset File Format

Example:

[preset]
name = "my-stack"
description = "My project baseline"
order = 20

[packages]
required = ["ripgrep", "fd"]
optional = ["jq"]

[env]
RUST_BACKTRACE = "1"

[shell]
hook = "echo ready"

[nix]
let = '''
myVar = "value";
'''
scripts = '''
hello = writers.writeBashBin "hello" "echo hi";
'''

Merge Behavior

• Presets are ordered by preset.order
• Required package lists are merged in order
• Removed packages in project state are respected
• Project-level env and shell settings override preset values