3.0.0-beta.8

Breaking changes

Configuration format

• Invalid escape sequences in quoted strings are now parse errors — previously, unknown escape sequences (e.g., \z, \$) were silently passed through. They now produce a lexer error. Use raw string literals (r"...") if you need literal backslashes in values (e.g., regex patterns).

Added

Configuration format

• Raw string literals — new r"..." syntax for strings with no escape processing. Raw strings are ideal for regex patterns where backslashes should be treated literally (e.g., r"^/api/v1(?:/|$)" instead of "^/api/v1(?:/|$)"). Raw strings do not support interpolation.
• Line continuation — a backslash (\) at the end of a line joins it with the next line, allowing long directives to be split across multiple lines (e.g., proxy http://localhost:3000 \ followed by http://localhost:3001).
• Semicolons as optional delimiters — semicolons (;) can now appear between statements and between host patterns as optional delimiters, providing compatibility with tools that generate semicolon-terminated output.

Changed

Configuration format

• Idiomatic configuration style — documentation now uses the new ferronconf idiomatic style: bare strings without quotes, bare boolean flags (e.g., io_uring instead of io_uring true), raw string literals for regex patterns (r"..."), and consistent 4-space indentation.
• Expanded bare string character set — bare strings now accept ., :, *, -, +, /, %, &, ?, @ directly without quoting, reducing the need for quoted strings in directive values.

Default pages

• Redesigned default error and directory listing pages — the built-in error pages and static directory listings have been redesigned to match new Ferron 3 branding (see https://ferron.sh/blog/ferron-new-look). The installation landing page (wwwroot) has also been refreshed to match.

Fixed

Configuration validation

• Duplicate observability block warning fix — fixed duplicate observability block warnings (they're now only displayed once) for ferron doctor.