red-blue-review

red-blue-review is a skill for Claude Code, Codex from CassioRoos/godfly-skills. It costs 56 tokens per session (507 once invoked), scanned A, original, MIT.

A two-sided review method for finding how a design, plan, codebase, or launch could fail and how to defend it. One side looks for attacks and failures; the other proposes practical protections.

In plain words
What is it for?
Use it to review code, designs, migrations, runbooks, security, reliability, or launch plans. It checks issues such as permission mistakes, bad input, leaked secrets, duplicate actions, partial writes, and weak rollback plans.
Why use it?
It exposes specific weaknesses before they affect users, data, money, uptime, or trust. It replaces vague risk lists with concrete failure paths and mitigations.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to review code, designs, migrations, runbooks, security, reliability, or launch plans. It checks issues such as permission mistakes, bad input, leaked secrets, duplicate actions, partial writes, and weak rollback plans.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/cassioroos/godfly-skills/red-blue-review
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 CassioRoos/godfly-skills --skill red-blue-review
Clone the repo
git clone --depth 1 https://github.com/CassioRoos/godfly-skills

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 red-blue-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/cassioroos/godfly-skills/red-blue-review/github.svg)](https://agentmods.dev/skills/cassioroos/godfly-skills/red-blue-review)
Your own site
<a href="https://agentmods.dev/skills/cassioroos/godfly-skills/red-blue-review"><img src="https://agentmods.dev/badge/skills/cassioroos/godfly-skills/red-blue-review/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 red-blue-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/cassioroos/godfly-skills/red-blue-review"><img src="https://agentmods.dev/badge/skills/cassioroos/godfly-skills/red-blue-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 507 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 $0.00056 $0.00507
Opus 5 $0.00028 $0.00253
Sonnet 5 $0.00011 $0.00101
Haiku 4.5 $0.00006 $0.00051

Measured 2d ago against content hash 117015df1640, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

red-blue-review 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.

skills/red-blue-review/SKILL.md · 85 lines

What it actually says

Red/Blue Review

Use opposing lenses to find what breaks and what defends it. Do not list generic risks. Produce concrete attack paths, failure paths, and mitigations.

Inputs To Gather

  • The artifact: code, diff, design, ADR, spec, migration, runbook, or launch plan.
  • The asset at risk: money, data integrity, availability, privacy, developer time, customer trust.
  • The threat or failure model: malicious actor, operator error, dependency failure, scale, bad data, ambiguous requirements.
  • The deployment context: environments, permissions, observability, rollback path.

Red Team

Act like the system will be misused, overloaded, misconfigured, or attacked.

Check:

  • Trust boundaries and privilege escalation.
  • Input validation and malformed data.
  • Authentication, authorization, and tenant isolation.
  • Secrets handling and accidental leakage.
  • Retry storms, duplicate effects, race conditions, and idempotency gaps.
  • Silent data corruption and partial writes.
  • Missing timeouts, circuit breakers, and backpressure.
  • Operational mistakes: bad deploy, bad config, bad rollback, stale docs.

Blue Team

Defend with practical controls, not wishful thinking.

For each credible issue:

  • Prevention: code/design change that stops it.
  • Detection: logs, metrics, traces, alerts, invariants, tests.
  • Containment: rate limits, circuit breakers, feature flags, kill switches.
  • Recovery: rollback, replay, reconciliation, data repair.
  • Ownership: who notices and who acts.

Output

## Red Team Findings

### Critical
- Attack/failure path:
  Evidence:
  Impact:
  Why current controls fail:

### High
- Attack/failure path:
  Evidence:
  Impact:
  Why current controls fail:

## Blue Team Plan

- Control:
  Covers:
  Implementation:
  Validation:

## Launch Gate

- Ship:
- Block:
- Spike:

Rule

If there is no evidence for a control, say "control not demonstrated." A design promise is not a control.

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 Changed · -3 lines 117015df1640
  2. 11d ago First seen · 88 lines · 56 tokens per session scan A fea893195631

Subscribe to this mod's changes

red-blue-review is a skill published in the GitHub repository CassioRoos/godfly-skills (1 stars, last pushed 2d ago), licensed MIT. It adds 56 tokens to every session and 507 once invoked, about $0.0003 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.