plastic-fail_depth

A test fixture designed to trigger a check for references nested too deeply inside a skill's references directory.

In plain words
What is it for?
Use it when testing the depth validation for skill reference files, specifically a file nested under references/sub/.
Why use it?
It helps verify that tooling detects unsupported or disallowed reference-file depth.

Skill for Claude CodeCodex

Part of the plastic plugin — 43 skills, 10 agents, 5 hooks, 1 MCP server shipped together

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.

agentmods
npx agentmods add skills/zalom/plastic/fail_depth
Any agent
npx skills add zalom/plastic --skill fail_depth
Clone the repo
git clone --depth 1 https://github.com/zalom/plastic

Made for: Claude Code, Codex.

Or install plastic, the plugin that ships this one along with the rest of its 43 skills, 10 agents, 5 hooks, 1 MCP server.

Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 75 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00018 $0.00075
Opus 5 $0.00009 $0.00037
Sonnet 5 $0.00004 $0.00015
Haiku 4.5 $0.00002 $0.00007

Measured 2d ago against content hash 8259b8f5932f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

plastic-fail_depth 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 2d 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.

test/fixtures/skill_lint/fail_depth/SKILL.md · 11 lines

What it actually says

Fail Depth Fixture

This fixture's references/ directory nests a file one level too deep, at references/sub/deep.md, when it read references/sub/deep.md for the detail.

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. 2d ago First seen · 11 lines · 18 tokens per session scan A 8259b8f5932f

Subscribe to this mod's changes

plastic-fail_depth is a skill published in the GitHub repository zalom/plastic (10 stars, last pushed 3d ago), licensed MIT. It adds 18 tokens to every session and 75 once invoked, about $0.0001 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 2026-08-31.

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