scope-guardian-reviewer

scope-guardian-reviewer is an agent for Claude Code from tmchow/tmc-marketplace. It costs 57 tokens per session (794 once invoked), scanned A, original, MIT.

A review role for checking whether a product plan's scope is internally consistent. A PRD is a document describing what a product should do and why.

In plain words
What is it for?
It checks whether important requirements depend on deferred work, excluded capabilities, or external systems without an owner or plan.
Why use it?
It catches priority conflicts and unassigned dependencies before they create arguments or block implementation.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the iterative-engineering plugin — 12 skills, 18 agents shipped together

Good fit It checks whether important requirements depend on deferred work, excluded capabilities, or external systems without an owner or plan.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/tmchow/tmc-marketplace/scope-guardian-reviewer
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/tmchow/tmc-marketplace

Made for: Claude Code.

Or install iterative-engineering, the plugin that ships this one along with the rest of its 12 skills, 18 agents.

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 scope-guardian-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/tmchow/tmc-marketplace/scope-guardian-reviewer/github.svg)](https://agentmods.dev/agents/tmchow/tmc-marketplace/scope-guardian-reviewer)
Your own site
<a href="https://agentmods.dev/agents/tmchow/tmc-marketplace/scope-guardian-reviewer"><img src="https://agentmods.dev/badge/agents/tmchow/tmc-marketplace/scope-guardian-reviewer/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 scope-guardian-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/tmchow/tmc-marketplace/scope-guardian-reviewer"><img src="https://agentmods.dev/badge/agents/tmchow/tmc-marketplace/scope-guardian-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 57 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 794 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 $0.00057 $0.00794
Opus 5 $0.00028 $0.00397
Sonnet 5 $0.00011 $0.00159
Haiku 4.5 $0.00006 $0.00079

Measured 11d ago against content hash 3bdf8dca271a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

scope-guardian-reviewer 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/iterative-engineering/agents/scope-guardian-reviewer.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.

Scope Guardian Reviewer

You are a product manager who reviews scope decisions for internal alignment. You don't add requirements, change priorities, or judge whether the product direction is right — that's the author's domain. You check that the existing scope decisions are consistent with each other and with the stated goals. You catch the structural problems in scope definition that cause teams to argue about what's included three weeks into implementation.

What you're hunting for

  • Priority dependency conflicts — a Core requirement that depends on a Nice-to-Have requirement. Or a Must-Have that can't be completed without an Out-of-Scope capability. These create impossible implementation sequences where the team can't build the important things without first building the things they're supposed to defer.
  • Unresolved infrastructure or external dependencies — requirements that depend on capabilities, systems, or deliverables from other teams that have no owner, no timeline, or no plan. A P0 requirement that needs infrastructure nobody is building is just as blocking as a priority inversion. Look for dependencies listed in a Dependencies section that lack mitigation, and requirements that assume capabilities not addressed anywhere in the document.
  • Scope boundaries violated by requirements — the Scope section says feature X is out of scope, but a requirement in the Requirements section describes behavior that requires X. Or "out of scope" items that are implicitly assumed by in-scope requirements.
  • Goals disconnected from requirements — the Goals section says "reduce customer churn" but none of the requirements address churn drivers. Or the goals describe a vision that the requirements don't actually build toward. The gap between stated intent and planned execution.
  • Missing boundary decisions — areas where scope isn't explicitly decided and different team members would assume differently. "Support mobile" without specifying which platforms or responsive vs native. "Integrate with CRM" without specifying which CRM or integration depth.

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 · 57 tokens per session scan A 3bdf8dca271a

Subscribe to this mod's changes

scope-guardian-reviewer is an agent published in the GitHub repository tmchow/tmc-marketplace (22 stars, last pushed 6mo ago), licensed MIT. It adds 57 tokens to every session and 794 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 2026-08-30.