ontology-atlas: Skill for Claude Code

.agents/skills/gate-probe/SKILL.md

gate-probe is a skill for Claude Code, Codex from wlsdks/ontology-atlas. It costs 34 tokens per session (796 once invoked), scanned A, original, MIT.

A method for testing whether an automated check really detects the problem it is meant to block. A gate can be a lint rule, test, or continuous-integration check.

In plain words
What is it for?
Use it to list existing violations, plant a deliberate defect, confirm the check fails, restore the code, and verify the check runs automatically.
Why use it?
It exposes checks that pass while inspecting the wrong thing, no files, or nothing at all.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is wlsdks/ontology-atlas's own configuration. It tells Claude Code and Codex how to work on ontology-atlas 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 ontology-atlas configures →

Reuse

Borrowing it

Nothing to install: this file belongs to wlsdks/ontology-atlas. 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/wlsdks/ontology-atlas/main/.agents/skills/gate-probe/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/wlsdks/ontology-atlas

Made for: Claude Code, Codex.

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 gate-probe

README.md
[![agentmods](https://agentmods.dev/badge/skills/wlsdks/ontology-atlas/gate-probe/github.svg)](https://agentmods.dev/skills/wlsdks/ontology-atlas/gate-probe)
Your own site
<a href="https://agentmods.dev/skills/wlsdks/ontology-atlas/gate-probe"><img src="https://agentmods.dev/badge/skills/wlsdks/ontology-atlas/gate-probe/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 gate-probe

Your own site · 80×15
<a href="https://agentmods.dev/skills/wlsdks/ontology-atlas/gate-probe"><img src="https://agentmods.dev/badge/skills/wlsdks/ontology-atlas/gate-probe.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 796 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 $0.00034 $0.00796
Opus 5 $0.00017 $0.00398
Sonnet 5 $0.00007 $0.00159
Haiku 4.5 $0.00003 $0.00080

Measured 5d ago against content hash a74532177190, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

gate-probe 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 5d 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.

.agents/skills/gate-probe/SKILL.md · 91 lines

How it starts

The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Gate probe

A green gate may be protecting the product or looking at nothing. Deliberately breaking the protected property is how to tell.

  • A gate is an automated check that blocks a violation: lint, contract test, e2e spec, or CI step.
  • A probe is a defect planted on purpose to prove that gate turns red.

This repository has shipped gates that searched generated prose instead of the screen, stayed green after the subject was deleted, checked only a function name, matched zero files, or were invoked by no workflow. None had been probed.

0. State the property

Write one sentence describing the product fact the gate protects. Distinguish the fact from its implementation. “The three installation stages remain reachable” is a property; “scroll equals zero” is an implementation detail.

1. Inventory before enabling

For a new rule, count every current hit and classify it by pattern and legitimacy. Confirm the real violations fit one pull request. Hundreds of new warnings are noise that hides existing signal. A global raw-shadow ban once raised warnings from 144 to 548; a measured selector found five actual defects.

If signal cannot be separated from noise, do not create the rule. Record the inventory and why the gate was rejected.

2. Plant the defect and require RED

Temporarily restore the exact defect or insert one violating line. Run the gate. If it stays green, the gate does not exist.

  • Change only the probe line; never use git checkout -- <file> and erase other work.
  • Confirm the failure message identifies what and where to fix.
  • Probe every independently protected condition.
  • Restore the line immediately and require GREEN again.

3. Block idle scans

A scan over zero subjects is always green. Count the subjects and fail at zero. For glob-based rules, prove the glob matches real files. A ratchet baseline that would fail when the scan narrows is another valid anti-idle layer.

expect(keys.length).toBeGreaterThan(0);
expect(measured, 'the collector measured nothing').toBeGreaterThan(3);

Read the full file on GitHub · 91 lines

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. 5d ago Changed · +2 lines a74532177190
  2. 11d ago First seen · 89 lines · 34 tokens per session scan A 63e6f4ecb65d

Subscribe to this mod's changes

gate-probe is a skill published in the GitHub repository wlsdks/ontology-atlas (103 stars, last pushed today), licensed MIT. It adds 34 tokens to every session and 796 once invoked, about $0.0002 per session on Opus 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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