rustfmt.toml

# rustfmt configuration — substrate MCP server
# Stable options only (rustfmt 1.95 stable channel).
# Nightly-only options are listed as comments for reference — enable only on nightly CI.

edition = "2024"
max_width = 100
hard_tabs = false
tab_spaces = 4
newline_style = "Unix"

# Stable import ordering
reorder_imports = true
reorder_modules = true

# Stable field/shorthand style
use_field_init_shorthand = true
use_try_shorthand = true

# Stable blank-line behavior
empty_item_single_line = true

# Stable trailing comma policy
trailing_comma = "Vertical"

# Stable match block formatting
match_block_trailing_comma = true

# Stable fn / struct single-line threshold
fn_single_line = false
struct_lit_single_line = true

# --- Nightly-only options (commented out for stable CI) ---
# imports_granularity = "Crate"
# group_imports = "StdExternalCrate"
# format_code_in_doc_comments = true
# format_macro_matchers = true
# format_strings = false