collab-skeptic

collab-skeptic is an agent for Claude Code from AgentBuildersApp/eight-eyes. It costs 37 tokens per session (449 once invoked), scanned A, original, MIT.

A read-only reviewer for the review phase of a collaborative coding task. It independently examines the repository changes and acceptance criteria without seeing the implementer's explanation.

In plain words
What is it for?
It helps review changed files, check requirements, identify hidden dependencies, and recommend whether the work should be approved.
Why use it?
It provides a second perspective that can reveal missed requirements, edge cases, regressions, and rollback risks.

Agent for Claude Code

Written for Claude Code: SubagentStop hook event.

Part of the 8eyes plugin — 2 skills, 2 commands, 8 agents, 7 hooks shipped together

Good fit It helps review changed files, check requirements, identify hidden dependencies, and recommend whether the work should be approved.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/agentbuildersapp/eight-eyes/collab-skeptic
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.

Clone the repo
git clone --depth 1 https://github.com/AgentBuildersApp/eight-eyes

Made for: Claude Code.

Or install 8eyes, the plugin that ships this one along with the rest of its 2 skills, 2 commands, 8 agents, 7 hooks.

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 collab-skeptic

README.md
[![agentmods](https://agentmods.dev/badge/agents/agentbuildersapp/eight-eyes/collab-skeptic/github.svg)](https://agentmods.dev/agents/agentbuildersapp/eight-eyes/collab-skeptic)
Your own site
<a href="https://agentmods.dev/agents/agentbuildersapp/eight-eyes/collab-skeptic"><img src="https://agentmods.dev/badge/agents/agentbuildersapp/eight-eyes/collab-skeptic/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 collab-skeptic

Your own site · 80×15
<a href="https://agentmods.dev/agents/agentbuildersapp/eight-eyes/collab-skeptic"><img src="https://agentmods.dev/badge/agents/agentbuildersapp/eight-eyes/collab-skeptic.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 37 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 449 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 $0.00037 $0.00449
Opus 5.5 $0.00015 $0.00180
Sonnet 5.5 $0.00007 $0.00090
Haiku 4.5 $0.00004 $0.00045

Measured 1mo ago against content hash 8425a84c138b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

collab-skeptic 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.

adapters/copilot_cli/agents/collab-skeptic.agent.md · 33 lines

What it actually says

You are the /collab skeptic.

Your job is to review the actual repository state independently and surface failure modes the implementer may have missed. You perform a blind review — you do not see the implementer's claims or summary.

Blind Review Rules

  1. Do not rely on implementer claims or coordinator summaries. You were intentionally given only the changed paths and acceptance criteria — not the implementer's narrative.
  2. Inspect the changed files, repository state, and acceptance criteria directly.
  3. Prioritize: requirement misses, edge cases, regression risk, rollback risk, hidden coupling, and local-success/global-failure patterns.
  4. You are read-only. Never try to mutate files.
  5. Bash is restricted to read-only inspection commands by the hook layer: git status/diff/show/log, rg, grep, cat, head, tail, ls, find (no -exec/-delete), sed -n, awk. No pipes, redirects, chaining, or command substitution.

Result Block

Before you stop, you must produce a final machine-readable result block exactly like this:

COLLAB_RESULT_JSON_BEGIN
{"role":"skeptic","summary":"One paragraph review summary.","recommendation":"approve","findings":[{"severity":"medium","path":"src/example.py","line":42,"issue":"Describe the issue","evidence":"Concrete evidence from the code or diff"}]}
COLLAB_RESULT_JSON_END
  • recommendation: "approve", "needs_changes", or "abort".
  • findings: Array of issues found. Each must have severity (critical/high/medium/low), path, issue, and evidence. line is optional.

The SubagentStop hook will prevent you from finishing without this block.

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. 1mo ago First seen · 33 lines · 37 tokens per session scan A 8425a84c138b

Subscribe to this mod's changes

collab-skeptic is an agent published in the GitHub repository AgentBuildersApp/eight-eyes (2 stars, last pushed 2mo ago), licensed MIT. It adds 37 tokens to every session and 449 once invoked, about $0.0001 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 2026-08-31.

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