Remove skill runner - #2100
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Keep first-party skills as instructions and readable resources. The release-notes example now reads its style guide, while the assistant workspace digest uses the existing workspace tools.
Keep Agent Skills focused on loading instructions and resources. Remove the runner API, execution tool, compiler entry point, and Think hook. Script files remain inert resources that models can read on demand.
Describe Agent Skills as on-demand instructions and inert resources. Point applications that need execution to explicit tools with their own permissions.
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ben-reitz
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Aug 12, 2026
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You think it's worth adding an example for how people can allow their agents to run scripts that are included in skills now?
(I don't know how commonly skills include scripts, but it is part of the skills spec...)
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Agent Skills currently combine loading task instructions with optional script execution. This makes
SkillRegistryresponsible for runtime permissions and adds a runner, build-time compilation, andexecution-specific dependencies to an otherwise read-only resource system.
This change removes
skills.runner,run_skill_script,agents/skills/compile, execution-onlytypes, and the Think runner hook. Vite now preserves script files as inert resources. The
first-party examples use
read_skill_resourceor existing workspace tools instead. The Turndownstub remains because Think's workspace Bash tool still imports
just-bash.The package builds and repository checks pass. The changeset, package README, examples, and Think guides document the breaking API removal and direct applications toward explicit tools when they need execution.