Release v0.13.0

[tylerbutler-release-bot]

v0.13.0 - 2026-04-11

Features

Added

Multi-target file mappings in repoverlay.ccl

A source file can now map to multiple target paths using duplicate keys in the mappings section:

mappings = .editorconfig = .editorconfig .editorconfig = packages/frontend/.editorconfig

This copies the source file to every listed target. Single-value mappings continue to work as before. All targets are tracked in the overlay state file, so remove cleans up every copy.

Fixes

Fixed

Log warnings when .ccl state files fail to parse instead of silently skipping

Previously, corrupted or unparseable .ccl state files were silently ignored. Now repoverlay logs a warning message identifying the problematic file before skipping it, making it easier to diagnose configuration issues.

Command: library

Fixed

Surface file read errors in show_file_diff instead of silently treating as empty

Previously, if reading either the existing or overlay file failed in show_file_diff, the error was silently swallowed and the file was treated as empty. Now the function logs a warning and prints a user-visible warning message identifying the problematic file before returning early.

Validate overlay names reject path separators in release builds

OverlayName previously only checked for forward slashes via debug_assert, meaning invalid names with path separators (including backslashes) could slip through in release builds. Added OverlayName::try_new which returns an error for names containing / or \, and updated all user-input paths to use it.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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