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Migrate your existing knip, jscpd, or stylelint configuration to fallow. The migrate command reads your current config, translates it to fallow’s format, and writes a new config file.

If more than one source config exists in your project, fallow merges them into a single config.

fallow migrate

Options

Flag	Description
`--toml`	Output as `fallow.toml` (mutually exclusive with `--jsonc`)
`--jsonc`	Write to `.fallowrc.jsonc` instead of `.fallowrc.json`. The generated content is the same JSONC (with `//` comments) either way; the `.jsonc` extension lets editors auto-detect JSON-with-comments syntax highlighting and silences linters that flag comments in `.json`
`--dry-run`	Preview the generated config without writing
`--from <PATH>`	Path to the config file to migrate

Without --jsonc or --toml, fallow auto-mirrors the source extension: a knip.jsonc migration writes .fallowrc.jsonc, a knip.json migration writes .fallowrc.json. The fallow config parser accepts comments in both extensions.

What it detects

Fallow auto-detects:

knip.json, knip.jsonc, .knip.json, .knip.jsonc, knip.ts, knip.config.ts
knip field in package.json

TypeScript config files (knip.ts, knip.config.ts) are detected but cannot be parsed. Convert to knip.json first, then re-run migrate.

.jscpd.json
jscpd field in package.json

Examples

# Detect config files and migrate
fallow migrate

# Preview without writing
fallow migrate --dry-run

# Write as TOML
fallow migrate --toml

# Write as JSON (default)
fallow migrate

# Migrate a specific config file
fallow migrate --from config/knip.json

Warnings are shown for any config fields that can’t be migrated automatically.

Migrating from knip

Detailed comparison and migration guide from knip.

Migrating from jscpd

Detailed comparison and migration guide from jscpd.

Commands

fallow migrate

Options

What it detects

Examples

See also

Migrating from knip

Migrating from jscpd

​Options

​What it detects

​Examples

​See also

Migrating from knip

Migrating from jscpd

Options

What it detects

Examples

See also