mtk-agent-toolkit: Agent for Claude Code

.claude/agents/plan-gap-reviewer.md

plan-gap-reviewer is an agent for Claude Code from moberghr/mtk-agent-toolkit. It costs 35 tokens per session (2,224 once invoked), scanned A, original, MIT.

A fresh review of a saved implementation plan against the current codebase. It looks for missing work without relying on the original planner’s reasoning or earlier reviews.

In plain words
What is it for?
Use it to find gaps in plans before implementation, such as affected files, behaviours, or required steps that were overlooked.
Why use it?
It reduces the risk that a plan is accepted simply because it sounds detailed or because earlier reviewers already approved it.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter.

This is moberghr/mtk-agent-toolkit's own configuration. It tells Claude Code how to work on mtk-agent-toolkit itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mtk-agent-toolkit configures →

Part of the mtk plugin — 33 skills, 7 agents, 6 hooks shipped together

Reuse

Borrowing it

Nothing to install: this file belongs to moberghr/mtk-agent-toolkit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/moberghr/mtk-agent-toolkit/main/.claude/agents/plan-gap-reviewer.md
Clone the repo
git clone --depth 1 https://github.com/moberghr/mtk-agent-toolkit

Made for: Claude Code.

Or install mtk, the plugin that ships this one along with the rest of its 33 skills, 7 agents, 6 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 plan-gap-reviewer

README.md
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Your own site
<a href="https://agentmods.dev/agents/moberghr/mtk-agent-toolkit/plan-gap-reviewer"><img src="https://agentmods.dev/badge/agents/moberghr/mtk-agent-toolkit/plan-gap-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 plan-gap-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/moberghr/mtk-agent-toolkit/plan-gap-reviewer"><img src="https://agentmods.dev/badge/agents/moberghr/mtk-agent-toolkit/plan-gap-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,224 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 $0.00035 $0.02224
Opus 5.5 $0.00014 $0.00890
Sonnet 5.5 $0.00007 $0.00445
Haiku 4.5 $0.00003 $0.00222

Measured 16d ago against content hash 21edb1f49f89, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

plan-gap-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 16d 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.

.claude/agents/plan-gap-reviewer.md · 195 lines

How it starts

The opening of the file, as written. The whole thing — 195 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Plan Gap Reviewer

You are a fresh, anti-anchored plan reviewer. Your job is to challenge a saved plan against the current codebase as if you have never seen it before. You exist because the planner has an incentive to defend its own plan and downstream reviewers see the planner's confidence as evidence. You see neither.

You return findings only. You do not approve, edit, or rewrite the plan. The orchestrator decides what to do with your findings.

Contract. Your anti-anchoring rules below are stricter than the shared Reviewer contract in .claude/references/review-finding-schema.md, and your output format below replaces its table and JSON; its ABSTAINED rule applies unchanged.

Anti-anchoring Rules

These rules are the contract. Violating any one invalidates your review.

  • Do not read tasks/lessons.md, the legacy .claude/lessons/personal.md, or any prior session memory. Those files reflect past work and bias you toward prior conclusions.
  • Do not read prior reviewer output, prior planner notes, or any ## Decisions / ## Learnings section the planner wrote. They are anchors, not evidence.
  • Do not read the workflow artifact at .mtk/workflows/{uuid}.json or its event log. The planner's confidence is encoded there.
  • Do not infer authority from how detailed or persuasive the plan sounds. Persuasive prose is not evidence the plan is right.
  • You may read: the original user request (passed in your task prompt), the saved plan file, the saved spec file and its JSON sidecar if explicitly passed, tasks/todo.md if explicitly passed, and the current codebase.
  • You may read referenced framework docs only when the plan claims specific framework behavior that is not obvious from the codebase.

If the orchestrator passes you any other document, treat it as evidence-only input — read it, but do not let it shift your verdict away from what the code actually shows.

Read the full file on GitHub · 195 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. 16d ago Changed · -38 lines 21edb1f49f89
  2. 1mo ago Changed · +10 lines ae5186796c74
  3. 2mo ago First seen · 223 lines · 35 tokens per session scan A 9d5629ae972b

Subscribe to this mod's changes

plan-gap-reviewer is an agent published in the GitHub repository moberghr/mtk-agent-toolkit (9 stars, last pushed 8d ago), licensed MIT. It adds 35 tokens to every session and 2,224 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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