Is build-mcpb safe?
Grade A, 96/100. No meaningful risk found.
This skill should be used when the user wants to "package an MCP server", "bundle an MCP", "make an MCPB", "ship a local MCP server", "distribute a local MCP", discusses ".mcpb files", mentions bundling a Node or Python runtime with their MCP server, or needs an MCP server that interacts with the local filesystem, desktop apps, or OS and must be installable without the user having Node/Python set up.
Abuild-mcpb
plugins/mcp-server-dev/skills/build-mcpb96/100 · No meaningful risk found8 low
build-mcpb
plugins/mcp-server-dev/skills/build-mcpbThis skill should be used when the user wants to "package an MCP server", "bundle an MCP", "make an MCPB", "ship a local MCP server", "distribute a local MCP", discusses ".mcpb files", mentions bundling a Node or Python runtime with their MCP server, or needs an MCP server that interacts with the local filesystem, desktop apps, or OS and must be installable without the user having Node/Python set up.
- Content hash
- sha256:947539c19b540c19fde05cc74a47e155ea4a5509f61ec73b7f2445a194eab2c3
- Files
- 3
- Quality
- 100/100
Security findings
- lowUnpinned package installSL501 · plugins/mcp-server-dev/skills/build-mcpb/SKILL.md:137
npx esbuild src/index.ts --bundle --platform=node --outfile=server/index.jsInstalling without a version means a future malicious release lands automatically. Fix: Pin an exact version (pkg==1.2.3, pkg@1.2.3).
- lowUnpinned package installSL501 · plugins/mcp-server-dev/skills/build-mcpb/SKILL.md:139
npx @anthropic-ai/mcpb packInstalling without a version means a future malicious release lands automatically. Fix: Pin an exact version (pkg==1.2.3, pkg@1.2.3).
- lowUnpinned package installSL501 · plugins/mcp-server-dev/skills/build-mcpb/SKILL.md:148
npx @anthropic-ai/mcpb packInstalling without a version means a future malicious release lands automatically. Fix: Pin an exact version (pkg==1.2.3, pkg@1.2.3).
- lowUnpinned package installSL501 · plugins/mcp-server-dev/skills/build-mcpb/SKILL.md:177
npx @anthropic-ai/mcpb initInstalling without a version means a future malicious release lands automatically. Fix: Pin an exact version (pkg==1.2.3, pkg@1.2.3).
- lowUnpinned package installSL501 · plugins/mcp-server-dev/skills/build-mcpb/SKILL.md:180
npx @modelcontextprotocol/inspector node server/index.jsInstalling without a version means a future malicious release lands automatically. Fix: Pin an exact version (pkg==1.2.3, pkg@1.2.3).
- lowUnpinned package installSL501 · plugins/mcp-server-dev/skills/build-mcpb/SKILL.md:183
npx @anthropic-ai/mcpb validateInstalling without a version means a future malicious release lands automatically. Fix: Pin an exact version (pkg==1.2.3, pkg@1.2.3).
- lowUnpinned package installSL501 · plugins/mcp-server-dev/skills/build-mcpb/SKILL.md:184
npx @anthropic-ai/mcpb packInstalling without a version means a future malicious release lands automatically. Fix: Pin an exact version (pkg==1.2.3, pkg@1.2.3).
- lowUnpinned package installSL501 · plugins/mcp-server-dev/skills/build-mcpb/SKILL.md:187
npx @anthropic-ai/mcpb sign dist/local-files.mcpbInstalling without a version means a future malicious release lands automatically. Fix: Pin an exact version (pkg==1.2.3, pkg@1.2.3).
Files in this skill
- SKILL.md7.7 KB
- references/local-security.md5.3 KB
- references/manifest-schema.md5.2 KB
Questions about build-mcpb
- Is build-mcpb safe to install?
- Our scanner gave build-mcpb grade A (96/100): no meaningful risk found. It matched 8 rule(s); review them below before installing. Static analysis cannot prove safety, so pin the reviewed revision with a lockfile.
- How do I install build-mcpb in Claude Code or Codex?
- Run skillhash add github:anthropics/claude-plugins-official/plugins/mcp-server-dev/skills/build-mcpb. It downloads the exact commit, checks the grade against your policy, writes skills.lock and installs it into .claude/skills and .agents/skills.
- What happens if build-mcpb changes upstream?
- Its content hash changes. skillhash verify fails in CI until you review the new version and update the lock. With a watch, you also get an alert.
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