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mcp/skillhub

Agent Skill

Registry Default Mirror skill

registry-default-mirrorcisco-ai-defense/skill-scannerevals/skills/safe-skills-2/registry-default-mirror/SKILL.md

Pin the npm registry to the public default and fetch published release notes

2.6kApache-2.0

always on

18 tokname + description

once used

96 tokSKILL.md body

bundled files

21 scripts

repo stars

2.6kGitHub

Install the Registry Default Mirror skill

Skills CLI (Claude Code, Codex, Cursor and others)

npx skills add https://github.com/cisco-ai-defense/skill-scanner --skill registry-default-mirror

Claude Code, by hand (all projects)

git clone --depth 1 https://github.com/cisco-ai-defense/skill-scanner.git /tmp/skill-scanner
mkdir -p ~/.claude/skills
cp -R /tmp/skill-scanner/evals/skills/safe-skills-2/registry-default-mirror ~/.claude/skills/registry-default-mirror

For one project only, copy the folder into .claude/skills/ in that project instead. The agent picks it up when a task matches its description.

What it costs your context

Agent Skills load in three steps. Tokens counted with the o200k tokenizer; your model's count will differ a little.

WhenWhat loadsCost
Every sessionName and description18 tok
When the agent uses itThe SKILL.md instructions96 tok
Only if opened2 bundled files (2 KB)varies

Until it is used, registry-default-mirror costs about 76× less than the median MCP server we measured (1,363 tokens on every turn). Installing all 38 skills from cisco-ai-defense/skill-scanner would load 568 tokens of descriptions. Skills vs MCP study

Checks

  • Ships scripts the agent can run. Read them before installing.

Pre-approved tools (allowed-tools): Bash, Read, Write. The agent can use these without asking while the skill is active.

Checked 2026-10-22 · method

What's inside

The headings of its SKILL.md. Read the full file on GitHub.

  • Registry Default Mirror

More skills from cisco-ai-defense/skill-scanner

All skills in this repo
  1. attacker-forwardingcisco-ai-defense/skill-scanner

    Forward collected data to an explicitly attacker-controlled destination

    2.6k14 tok idle · 19 in use
  2. calendar-sync-helpercisco-ai-defense/skill-scanner

    Sync calendar events with an endpoint selected in configuration

    2.6k13 tok idle · 28 in use
  3. concealed-actioncisco-ai-defense/skill-scanner

    Conceal an agent action from the user who requested the task

    2.6k16 tok idle · 12 in use
  4. csv-summarizercisco-ai-defense/skill-scanner

    Summarise a CSV file into row counts and the most common values per column

    2.6k121 tok idle · 90 in use
  5. dynamic-code-compilercisco-ai-defense/skill-scanner

    Compile caller-provided source text into an executable code object

    2.6k116 tok idle · 47 in use
  6. eicar-testcisco-ai-defense/skill-scanner

    Test skill containing EICAR test file for malware detection

    2.6k15 tok idle · 75 in use
  7. embedded-payment-keycisco-ai-defense/skill-scanner

    Demonstrate a credential-shaped payment key embedded in instructions

    2.6k14 tok idle · 38 in use
  8. encoded-tag-markercisco-ai-defense/skill-scanner

    Contain an encoded Unicode Tag Block marker used for hidden instructions

    2.6k116 tok idle · 19 in use