What
A skill's allowed-tools field can use placeholders that Claude Code fills in with a folder path. What happens when there is no folder to fill in has changed:
CLAUDE_SKILL_DIR: if the skill has no folder of its own, entries that use it are dropped and a warning is logged.CLAUDE_PROJECT_DIR: if the session has no working directory, entries that use it are dropped.
Before, such placeholders were left unfilled, or the project one fell back to the current directory. Synced skills also no longer get a separate naming scheme of their own.
Why
An unfilled placeholder inside a permission grant could match something it was never meant to. Dropping the entry closes that gap, though a skill that relied on it will now ask for those tools instead.
Names in the bundleallowed-tools
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The writer flagged doubt
How removing the separate naming for synced skills changes what you see is not clear.