boundary-probing

boundary-probing is a skill for Claude Code, Codex from yogsoth-ai/de-anthropocentric-research-engine. It costs 25 tokens per session (418 once invoked), scanned A, original, Apache-2.0.

A systematic boundary-testing workflow that maps a parameter space, probes extreme and unusual inputs, and finds where a claim breaks down. It summarises the results as a range in which the claim remains valid.

In plain words
What is it for?
Use it to test software behaviour, models, or experimental claims at limits such as zero, negative values, empty inputs, and overflow.
Why use it?
It exposes edge-case failures and incomplete validity claims. It also helps identify which parameter dimensions deserve attention when the testing budget is limited.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents.

Good fit Use it to test software behaviour, models, or experimental claims at limits such as zero, negative values, empty inputs, and overflow.

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Install with agentmods
npx agentmods add skills/yogsoth-ai/de-anthropocentric-research-engine/boundary-probing
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 yogsoth-ai/de-anthropocentric-research-engine --skill boundary-probing
Clone the repo
git clone --depth 1 https://github.com/yogsoth-ai/de-anthropocentric-research-engine

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 boundary-probing

README.md
[![agentmods](https://agentmods.dev/badge/skills/yogsoth-ai/de-anthropocentric-research-engine/boundary-probing/github.svg)](https://agentmods.dev/skills/yogsoth-ai/de-anthropocentric-research-engine/boundary-probing)
Your own site
<a href="https://agentmods.dev/skills/yogsoth-ai/de-anthropocentric-research-engine/boundary-probing"><img src="https://agentmods.dev/badge/skills/yogsoth-ai/de-anthropocentric-research-engine/boundary-probing/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 boundary-probing

Your own site · 80×15
<a href="https://agentmods.dev/skills/yogsoth-ai/de-anthropocentric-research-engine/boundary-probing"><img src="https://agentmods.dev/badge/skills/yogsoth-ai/de-anthropocentric-research-engine/boundary-probing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 418 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 $0.00025 $0.00418
Opus 5 $0.00013 $0.00209
Sonnet 5 $0.00005 $0.00084
Haiku 4.5 $0.00003 $0.00042

Measured 8d ago against content hash 43cbe0de1242, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

boundary-probing 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 8d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

skills/boundary-probing/SKILL.md · 59 lines

What it actually says

Boundary Probing

Orchestration Steps

  1. Receive claim and parameter context from strategy
  2. Dispatch parameter-space-mapping to identify all dimensions
  3. For each dimension, dispatch extreme-value-generation:
    • Minimum, maximum, zero, negative, overflow
    • Type boundaries (empty, null, singleton, infinite)
  4. Dispatch breakpoint-detection at each extreme value
  5. Record pass/fail for each probe point
  6. Dispatch validity-envelope-construction to synthesize boundaries

Subagents

  • parameter-space-mapping
  • extreme-value-generation
  • breakpoint-detection
  • validity-envelope-construction

Termination Conditions

  • All dimensions probed at all boundary values (complete)
  • Breakpoint found in critical dimension (early report)
  • Budget exhausted (report partial envelope)
  • Dimension count exceeds budget (prioritize by sensitivity)

Available SOPs

Optional, no fixed order; the final leaf is always a sop.

SOP When to use
breakpoint-detection Test a claim at extreme parameter values and detect the precise point where it breaks down.
extreme-value-generation Generate boundary and extreme test values for a given parameter dimension to stress-test claims.
parameter-space-mapping Identify all parameter dimensions along which a claim's validity might vary.
stress-test-validity-envelope-construction Synthesize breakpoints across dimensions into a coherent validity envelope for a claim.
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. 8d ago First seen · 59 lines · 25 tokens per session scan A 43cbe0de1242

Subscribe to this mod's changes

boundary-probing is a skill published in the GitHub repository yogsoth-ai/de-anthropocentric-research-engine (462 stars, last pushed 2d ago), licensed Apache-2.0. It adds 25 tokens to every session and 418 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 2026-09-03.