The synthesized plugin that delivers managed MCP and LSP configuration to
Claude Code was named `claude-code-home-manager`. Claude Code derives the
MCP tool namespace from the plugin manifest (`plugin.json`), so that name
appeared in the prefix of every plugin-loaded MCP tool
(`mcp__plugin_<name>_<server>__<tool>`), adding 22 characters of overhead per
tool name.
Shorten the manifest name to `hm`, centralizing it in a `generatedPluginName`
binding, so tool prefixes become `mcp__plugin_hm_<server>__<tool>`. The
personal-plugin directory entry keeps the stable `claude-code-home-manager`
name (the path under `~/.claude/skills/`); a short name there would collide
with valid `programs.claude-code.plugins.hm` or `skills.hm` and fail the
uniqueness assertions.
This is a breaking change: users who allow or deny these tools by name in
their settings must update references from `claude-code-home-manager` to
`hm`. A news entry documents the migration.
Closes#9446
Assisted-by: Claude-Code:GLM-5.2
Claude Code lists a plugin's `agents/` and `commands/` entries with a
`readdir` that accepts only regular files, so symlinked directory entries
are skipped. Managed plugins were linked recursively, which materializes a
real directory holding one symlink per file, and wrapped with
`pkgs.symlinkJoin`, which mirrors directories and symlinks the leaf files.
Both layers dropped every agent and command a plugin provides.
Link each plugin as a single directory symlink, and wrap it with a
`runCommand` that links only top-level entries so component directories stay
symlinks to the original.
Also accept an attribute set for `plugins`, making the personal-plugin
directory name user-controlled and stable rather than derived from the
source's base name, which yields names such as `bxa1s0m3h4sh-source` that
change whenever the plugin is updated. The list form keeps working, with a
warning.
Move public option declarations and file-entry helpers into dedicated files while keeping module assembly in default.nix. Update the AI labeler for the new module directory.
