verify-llm-artifacts

verify-llm-artifacts is a skill for Claude Code from existential-birds/beagle. It costs 71 tokens per session (2,620 once invoked), scanned A, original, Apache-2.0.

A second review step for findings from a scan that looks for unused or suspicious code and other AI-generated project artifacts. It checks whether reported findings are real before deletion or risky refactoring.

In plain words
What is it for?
Use it after an artifact review, especially before deleting dead code, applying risky fixes, or accepting results from a full-project scan.
Why use it?
It reduces false positives so code that is still needed is not removed or changed based only on an automated review.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

Part of the beagle-core plugin — 19 skills shipped together

Good fit Use it after an artifact review, especially before deleting dead code, applying risky fixes, or accepting results from a full-project scan.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/existential-birds/beagle/verify-llm-artifacts
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add existential-birds/beagle --skill verify-llm-artifacts
Clone the repo
git clone --depth 1 https://github.com/existential-birds/beagle

Made for: Claude Code.

Or install beagle-core, the plugin that ships this one along with the rest of its 19 skills.

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.

agentmods badge for verify-llm-artifacts

README.md
[![agentmods](https://agentmods.dev/badge/skills/existential-birds/beagle/verify-llm-artifacts/github.svg)](https://agentmods.dev/skills/existential-birds/beagle/verify-llm-artifacts)
Your own site
<a href="https://agentmods.dev/skills/existential-birds/beagle/verify-llm-artifacts"><img src="https://agentmods.dev/badge/skills/existential-birds/beagle/verify-llm-artifacts/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.

agentmods 80×15 button for verify-llm-artifacts

Your own site · 80×15
<a href="https://agentmods.dev/skills/existential-birds/beagle/verify-llm-artifacts"><img src="https://agentmods.dev/badge/skills/existential-birds/beagle/verify-llm-artifacts.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,620 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00071 $0.02620
Opus 5.5 $0.00028 $0.01048
Sonnet 5.5 $0.00014 $0.00524
Haiku 4.5 $0.00007 $0.00262

Measured 1mo ago against content hash 34a8be5c21f2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

verify-llm-artifacts 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.

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.

plugins/beagle-core/skills/verify-llm-artifacts/SKILL.md · 164 lines

How it starts

The opening of the file, as written. The whole thing — 164 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Verify LLM Artifacts Findings

Second-pass verification for .beagle/llm-artifacts-review.json. The detection pass optimizes for recall; this pass optimizes for precision so agents do not remove or “clean” code that is still required.

When to run

  • After the review-llm-artifacts skill (especially full-project scans).
  • Before the fix-llm-artifacts skill when findings include deletions, dead code, or High risk.
  • Whenever past runs flagged artifacts that should not have been removed.

Inputs

  • Required: .beagle/llm-artifacts-review.json from a completed review.
  • Optional: $ARGUMENTS — --priority-only (verify dead_code and any fix_action of delete first; then others), --id N (single finding id).

If the review file is missing, exit with: Run the review-llm-artifacts skill first.

Prerequisite skills

  1. Load the review-verification-protocol skill — general anti–false-positive discipline, including the Anti-confabulation gate (echo the artifact from a freshly read source before any verdict). The Load + ECHO gate in step 1 is this skill's concrete instance of that rule.
  2. Load the llm-artifacts-detection skill — category criteria for what counts as a real issue.

Instructions

Hard gates

Objective pass conditions before you claim verification is done:

  1. Input parse: The JSON load command in step 1 exits 0 (no traceback). Pass: valid JSON on disk at .beagle/llm-artifacts-review.json.
  2. Echo before adjudicate: Step 1 has printed the full finding table (one row per findings[] entry: id, file, line, category, description) sourced from the parsed JSON in this turn. Pass: the table exists in your output and its row count equals len(findings) — you have not begun any verdict before it.
  3. ID lock: Step 1 has recorded the exact id set from findings[] and stated it explicitly. Every results entry maps 1:1 to a locked id — none added, none dropped. Pass: the locked id list is printed; if at any point an apparent finding has no matching locked id, you STOP (see step 1, ID lock).
  4. Evidence before verdict: For each finding you adjudicate, you have applied references/verification-checklist.md for its category (or documented why the category is N/A) and recorded matching strings in checks_performed. Pass: no status without at least one checklist-backed check or an explicit N/A note in notes.
  5. Output contract: After writing .beagle/llm-artifacts-verification.json, the validate command in step 4 exits 0; summary counts equal the number of results entries by status; the results id set equals the locked id set from gate 3 exactly. Pass: schema-valid JSON and results ids == locked ids == source findings[] ids.

Read the full file on GitHub · 164 lines

Files

What ships with it

1 file 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 · 164 lines · 71 tokens per session scan A 34a8be5c21f2

Subscribe to this mod's changes

verify-llm-artifacts is a skill published in the GitHub repository existential-birds/beagle (84 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 71 tokens to every session and 2,620 once invoked, about $0.0003 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 2026-08-30.

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