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 LerianStudio/ring --skill using-assertgit clone --depth 1 https://github.com/LerianStudio/ringWrote 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/lerianstudio/ring/using-assert)<a href="https://agentmods.dev/skills/lerianstudio/ring/using-assert"><img src="https://agentmods.dev/badge/skills/lerianstudio/ring/using-assert/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/lerianstudio/ring/using-assert"><img src="https://agentmods.dev/badge/skills/lerianstudio/ring/using-assert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Data Exfiltration · line 60 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
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 | $0.00099 | $0.01974 |
| Opus 5.5 | $0.00040 | $0.00790 |
| Sonnet 5.5 | $0.00020 | $0.00395 |
| Haiku 4.5 | $0.00010 | $0.00197 |
Grade A, and why
ring:using-assert 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.
How it starts
The opening of the file, as written. The whole thing — 166 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ring:using-assert
Moved from lib-commons
The canonical home for this package is now github.com/LerianStudio/lib-observability/assert. It lived in github.com/LerianStudio/lib-commons/v4/commons/assert and github.com/LerianStudio/lib-commons/v5/commons/assert through the v4 and v5 shim period; lib-commons v5 still re-exports every symbol via type aliases and thin wrappers for backward compatibility, but every type and function in lib-commons/v5/commons/assert is marked Deprecated: and delegates to lib-observability/assert. New code MUST import github.com/LerianStudio/lib-observability/assert. Existing imports continue to compile during the deprecation window — there are no behavior changes, only an import-path move.
When to use
Sweep mode:
- "Sweep the codebase for lib-observability/assert opportunities"
- "Audit this service for zero-panic policy compliance"
- "Find panic()/log.Fatal violations"
- "Replace DIY invariant checks with lib-observability/assert"
Reference mode:
- "What's the signature for assert.DebitsEqualCredits?"
- "How do I initialize assertion metrics?"
- "Should I panic, assert, or return an error here?"
- "How do I unwrap AssertionError in a Fiber error handler?"
Skip when
- Working on non-Go services
- Working on frontend code
- Target codebase is Ring itself
Related
Similar: ring:using-lib-observability, ring:using-runtime Compatibility: ring:using-lib-commons (covers the v5 deprecation shim and re-export aliases)
Mode Selection
| Request Shape | Mode |
|---|---|
| "Sweep / audit for assert opportunities" | Sweep |
| "Find panic()/log.Fatal() violations" | Sweep |
| "What's the signature for X?" | Reference |
| "Should I panic, assert, or return error?" | Reference |
SWEEP MODE
4-phase sweep. Each phase has a hard gate — do not proceed until the current phase produces its artifact.
Phase 1: Version Reconnaissance → assert-version-report.json
Phase 2: CHANGELOG Delta Analysis → assert-delta-report.json
Phase 3: Multi-Angle DIY Sweep → 6 × assert-sweep-{N}-{angle}.json
Phase 4: Consolidated Report → assert-sweep-report.md + assert-sweep-tasks.json
What ships with it
2 files 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.
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.
- 1mo ago First seen · 166 lines · 99 tokens per session scan A 97cb6be42faa
ring:using-assert is a skill published in the GitHub repository LerianStudio/ring (218 stars, last pushed 7d ago), licensed Apache-2.0. It adds 99 tokens to every session and 1,974 once invoked, about $0.0004 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 2026-09-03.
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