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.
npx skills add randommonicle/claude-skills --skill dependency-upgrade-verificationgit clone --depth 1 https://github.com/randommonicle/claude-skillsWrote 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.
[](https://agentmods.dev/skills/randommonicle/claude-skills/dependency-upgrade-verification)<a href="https://agentmods.dev/skills/randommonicle/claude-skills/dependency-upgrade-verification"><img src="https://agentmods.dev/badge/skills/randommonicle/claude-skills/dependency-upgrade-verification/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.
<a href="https://agentmods.dev/skills/randommonicle/claude-skills/dependency-upgrade-verification"><img src="https://agentmods.dev/badge/skills/randommonicle/claude-skills/dependency-upgrade-verification.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00097 | $0.00356 |
| Opus 5 | $0.00048 | $0.00178 |
| Sonnet 5 | $0.00019 | $0.00071 |
| Haiku 4.5 | $0.00010 | $0.00036 |
Grade A, and why
dependency-upgrade-verification 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 12d 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.
What it actually says
Dependency-upgrade verification
A SQLite plugin jumped two majors and the question was whether existing on-device databases would survive. Inspecting runtime data could not answer it: an idempotent initialiser makes a fresh database indistinguishable from a correctly-upgraded one. The data could not distinguish the hypotheses, so no amount of device testing would.
The rule
When runtime evidence cannot distinguish "upgrade handled correctly" from "silently started fresh" (or any two hypotheses about a major bump), move upstream to something the failure cannot forge — the dependency's own published source:
npm pack package@old package@new
# unpack both, diff the file that decides the behaviour
Diff the specific file that implements the concern (the storage layer, the migration handler, the serialisation format), offline, before hunting for a device repro. The tarballs are free, authoritative, and available without a device.
Why
Published tarballs are a first-class diagnostic that answers in minutes what black-box testing cannot answer at all when the observable states are identical. Evidence: ASH LESSONS_LEARNED 2026-07-20 (SQLite plugin 6 to 8).
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.
- 12d ago First seen · 33 lines · 0 tokens per session scan A 48bcb9eb8e7c
dependency-upgrade-verification is a skill published in the GitHub repository randommonicle/claude-skills (23 stars, last pushed 5d ago), licensed Apache-2.0. It adds 97 tokens to every session and 356 once invoked, about $0.0005 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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