Formatters

OpenCorvus auto-formats files the agent writes or edits, using the formatter that matches the file’s language and the project’s configuration. Implementation: packages/opencorvus/src/format/.

Built-in detection

OpenCorvus detects formatters by inspecting the project’s tooling:

Formatter	Trigger
prettier	prettier in package.json deps or .prettierrc* config present
gofmt	*.go files in repo
rustfmt	Cargo.toml present
black	pyproject.toml with tool.black or requirements*.txt lists black
Project script	package.json format / lint:fix scripts

The exact registry is in packages/opencorvus/src/format/formatter.ts.

Configuration

Override or extend in config under formatter:

{
  "formatter": {
    "prettier": { "disabled": true },
    "custom-prettier": {
      "command": ["npx", "prettier", "--write", "$FILE"],
      "environment": { "NODE_ENV": "development" },
      "extensions": [".js", ".ts", ".jsx", ".tsx"],
    },
  },
}

• disabled — turn off a built-in formatter.
• command — argv list; $FILE is replaced with the path.
• environment — extra env vars for the formatter process.
• extensions — file suffixes that trigger this formatter.

When formatters run

Formatters run after a successful write / edit / apply_patch tool call and before the step result is recorded. Failures fall through with a warning — they do not block the agent.

Disabling all formatting

Set every relevant formatter to disabled: true, or remove its trigger (e.g., delete .prettierrc*). There is no global “disable formatters” switch.