second-opinion

second-opinion is a skill for Claude Code from s0912758806p/agentic-sop-to-work. It costs 266 tokens per session (970 once invoked), scanned A, original, MIT.

An independent, skeptical review of a finished draft that checks whether its claims are supported by its evidence.

In plain words
What is it for?
It is for fact-checking reports and other drafts before sign-off, using either a recorded agent run or user-provided documents and sources.
Why use it?
It helps find fabricated or mistyped numbers, invented identifiers, wrong pass-or-fail conclusions, and claims that go beyond the data.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the second-opinion-honesty plugin — 1 skill, 1 command shipped together

Good fit It is for fact-checking reports and other drafts before sign-off, using either a recorded agent run or user-provided documents and sources.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/s0912758806p/agentic-sop-to-work/second-opinion
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 s0912758806p/agentic-sop-to-work --skill second-opinion
Clone the repo
git clone --depth 1 https://github.com/s0912758806p/agentic-sop-to-work

Made for: Claude Code.

Or install second-opinion-honesty, the plugin that ships this one along with the rest of its 1 skill, 1 command.

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 second-opinion

README.md
[![agentmods](https://agentmods.dev/badge/skills/s0912758806p/agentic-sop-to-work/second-opinion/github.svg)](https://agentmods.dev/skills/s0912758806p/agentic-sop-to-work/second-opinion)
Your own site
<a href="https://agentmods.dev/skills/s0912758806p/agentic-sop-to-work/second-opinion"><img src="https://agentmods.dev/badge/skills/s0912758806p/agentic-sop-to-work/second-opinion/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 second-opinion

Your own site · 80×15
<a href="https://agentmods.dev/skills/s0912758806p/agentic-sop-to-work/second-opinion"><img src="https://agentmods.dev/badge/skills/s0912758806p/agentic-sop-to-work/second-opinion.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 266 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 970 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.
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 $0.00266 $0.00970
Opus 5 $0.00133 $0.00485
Sonnet 5 $0.00053 $0.00194
Haiku 4.5 $0.00027 $0.00097

Measured 11d ago against content hash b7be88c1c935, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

second-opinion 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 11d 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.

plugins/second-opinion-honesty/skills/second-opinion/SKILL.md · 48 lines

How it starts

The opening of the file, as written. The whole thing — 48 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Second Opinion — adversarial honesty reviewer

An independent, skeptical second reader for a finished DRAFT. It checks whether every claim is backed by its evidence and hands back a findings report — which is itself a DRAFT. A human decides.

When to use / not use

  • Use when: "get a second opinion on this report", "is this draft trustworthy / honest", "double-check the numbers before I sign", "red-team this output", "did it make anything up?"
  • Not for architecture ("is my workflow decomposed / a mega-agent?") → agentic-workflow-audit.
  • Not for source-code quality / bugs / security/code-review, /security-review. Second Opinion reads a produced artifact's claims vs its cited evidence, in any domain.

What it catches (domain-neutral)

  • #1 wrong PASS/FAIL or spec-limit verdicts, and aggregates that don't recompute.
  • #2 numbers with no matching source token (fabrication / transcription error).
  • #3 invented identifiers / dates / names with no provenance (should be 【待補】).
  • #4 conclusions the data don't support (overreach) — advisory.

How it works (two layers; the guarantees are in CODE, not this prose)

  1. Deterministic layer (stdlib, hermetic): catches #1/#2/#3. In FULL mode these are HARD at confidence 1.0 (the kit trace is authoritative); in DEGRADED mode they are SOFT at 0.5 (provenance reconstructed from supplied inputs).
  2. Advisory LLM layer (you): catches #4 and fuzzy #1. It is capped (SECONDOP_MAX_LLM_PASSES, default 1) and every finding is clamped to SOFT / advisory / confidence ≤ 0.5, dropped unless it cites a verbatim draft span (or NO SOURCE), and suppressed if it re-litigates a slot the deterministic layer already settled.

To run it

Invoke the /second-opinion command, which orchestrates the deterministic pass → your capped advisory pass → the code-enforced fold-in → the human STOP. Modes:

  • /second-opinion <run_dir> — FULL (an agentic-sop-kit run dir)
  • /second-opinion <doc> --inputs <file...> — DEGRADED (any document)
  • /second-opinion — the bundled cross-domain demo

Read the full file on GitHub · 48 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. 11d ago First seen · 48 lines · 266 tokens per session scan A b7be88c1c935

Subscribe to this mod's changes

second-opinion is a skill published in the GitHub repository s0912758806p/agentic-sop-to-work (206 stars, last pushed 2d ago), licensed MIT. It adds 266 tokens to every session and 970 once invoked, about $0.0013 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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