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Puppetmaster: Skill for Claude Code

.cursor/skills/verify-puppetmaster-jev/SKILL.md

verify-puppetmaster-jev is a skill for Claude Code, Cursor from professorpalmer/Puppetmaster. It costs 41 tokens per session (576 once invoked), scanned A, original, MIT.

A verification procedure for checking specific Puppetmaster Jev behavior in an isolated temporary environment. It runs automated tests and checks that settings and secrets from the user's environment do not affect the result.

In plain words
What is it for?
Use it to verify that opt-in and acting settings behave correctly, observe-only versions stay inactive, and the related Python tests pass.
Why use it?
It helps catch incorrect state transitions and prevents testing from changing or exposing live user data.

Skill for Claude CodeCursor

Written for Claude Code and Cursor: disable-model-invocation in frontmatter, but also installed under .cursor/.

This is professorpalmer/Puppetmaster's own configuration. It tells Claude Code and Cursor how to work on Puppetmaster itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Puppetmaster configures →

not rated 471repo +2 3d ago A scan 41 tokens original MIT
View source ↗ professorpalmer/Puppetmaster
Reuse

Borrowing it

Nothing to install: this file belongs to professorpalmer/Puppetmaster. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/professorpalmer/Puppetmaster/main/.cursor/skills/verify-puppetmaster-jev/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/professorpalmer/Puppetmaster

Made for: Claude Code, Cursor.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

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README.md
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Your own site
<a href="https://agentmods.dev/skills/professorpalmer/puppetmaster/verify-puppetmaster-jev"><img src="https://agentmods.dev/badge/skills/professorpalmer/puppetmaster/verify-puppetmaster-jev/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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Your own site · 80×15
<a href="https://agentmods.dev/skills/professorpalmer/puppetmaster/verify-puppetmaster-jev"><img src="https://agentmods.dev/badge/skills/professorpalmer/puppetmaster/verify-puppetmaster-jev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 576 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00041 $0.00576
Opus 5.5 $0.00016 $0.00230
Sonnet 5.5 $0.00008 $0.00115
Haiku 4.5 $0.00004 $0.00058

Measured 1mo ago against content hash 38e1b080c612, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

verify-puppetmaster-jev scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/doctor.py, scripts/prove_observe.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.cursor/skills/verify-puppetmaster-jev/SKILL.md · 77 lines

What it actually says

Verify Puppetmaster Jev

Library plus CLI. Isolated temp store. Never use the user's live .puppetmaster/ state. Never print an OpenRouter key.

Launch

Ready: python -m unittest tests.test_jev_transition -q exits 0 from the Jev worktree (Puppetmaster-jev-oracle or the product checkout that contains puppetmaster/jev/).

cd "$REPO"
.venv/bin/python -m unittest tests.test_jev_transition -q

Use the repo venv if present; otherwise python3 on PATH. Teardown is the process exit. Helpers write under /tmp/verify-this/puppetmaster-jev/ and must not delete prior receipts.

Doctor

.cursor/skills/verify-puppetmaster-jev/scripts/doctor.py

Must report:

  • opted_in=false and acting=false in a cleared env
  • test_jev_transition importable
  • no PUPPETMASTER_JEV / PUPPETMASTER_JEV_ACT leak from the host after hermetic_env import

If doctor fails, fix the tree. Do not drive live Decisions.

Drive

Prefer the helper, then unittest, then an optional live observe.

.cursor/skills/verify-puppetmaster-jev/scripts/prove_observe.py

Mapped features: features/README.md.

Evidence

A pass is:

  1. Helper JSON at /tmp/verify-this/puppetmaster-jev/observe.json
  2. v1_acts_on_opt_in=true (auditor skipped without JEV_ACT)
  3. v234_match_today=true (launch / admit / enqueue unchanged)
  4. Unittest exit 0
  5. show / stitcher preview contains ## Jev only when a jev_transition GATE exists

Live Decisions are optional and only when the user named a key source. Load the key in-process. Never write it to evidence.

Cleanup

Kill only the helper/unittest PIDs this run started. Leave /tmp/verify-this/puppetmaster-jev/ in place.

Helpers

  • .cursor/skills/verify-puppetmaster-jev/scripts/doctor.py
  • .cursor/skills/verify-puppetmaster-jev/scripts/prove_observe.py
Files

What ships with it

8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 77 lines · 41 tokens per session scan A 38e1b080c612

Subscribe to this mod's changes

verify-puppetmaster-jev is a skill published in the GitHub repository professorpalmer/Puppetmaster (471 stars, last pushed 3d ago), licensed MIT. It adds 41 tokens to every session and 576 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-20.

Claude CodeSecurityTestingUnit testingagent-swarmsagentsai-agentscodexcursor
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