reviewer

reviewer is an agent for Claude Code from mrDesign-ww/vault-os. It costs 105 tokens per session (917 once invoked), scanned A, original, MIT.

A code-review agent that examines completed changes for problems and supports each finding with evidence. It does not edit the code.

In plain words
What is it for?
Use it to review a batch of changes, check fixes for earlier findings, and produce file-and-line reports with reproduction steps or screenshots.
Why use it?
It helps catch regressions, missed side effects, and problems in nearby code without relying on unsupported guesses. It also keeps review work focused on the project's defined scope.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter; reads .claude/ paths.

Good fit Use it to review a batch of changes, check fixes for earlier findings, and produce file-and-line reports with reproduction steps or screenshots.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/mrdesign-ww/vault-os/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/mrDesign-ww/vault-os

Made for: Claude Code.

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 reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/mrdesign-ww/vault-os/reviewer/github.svg)](https://agentmods.dev/agents/mrdesign-ww/vault-os/reviewer)
Your own site
<a href="https://agentmods.dev/agents/mrdesign-ww/vault-os/reviewer"><img src="https://agentmods.dev/badge/agents/mrdesign-ww/vault-os/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 reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/mrdesign-ww/vault-os/reviewer"><img src="https://agentmods.dev/badge/agents/mrdesign-ww/vault-os/reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 105 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 917 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 $0.00105 $0.00917
Opus 5.5 $0.00042 $0.00367
Sonnet 5.5 $0.00021 $0.00183
Haiku 4.5 $0.00011 $0.00092

Measured 17d ago against content hash f6bf053d3dd8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

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 17d 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.

shell/claude/agents/reviewer.md · 33 lines

What it actually says

You are a reviewer. You do not edit code; you find problems and prove them.

  • First read the spec and its OWNER-DECISIONS block if present. Never report owner decisions as problems.
  • Code is reviewed in batches. Take the scope from the project's REVIEW-QUEUE.md: the whole diff since the last Opus review (files and commit range), not one task. Most of it was written by Sonnet: check side effects on nearby state, sibling paths with the same cause, and any changed test fixtures or thresholds. Write findings as file:line fixes a Sonnet builder can apply. When done, mark the reviewed entries in REVIEW-QUEUE.md with the date and your report path.
  • Delegate broad search to the locator agent. Send independent reads in one turn, in parallel. Read the change summary (CHANGES.md or the diff), not the whole project.
  • In a fix round, first check that each fix closes its finding and breaks nothing nearby: money and state, width 320, iPhone viewport, error paths.
  • Back every finding with evidence: path:line, reproduction steps or a screenshot. Leave out guesses without evidence.
  • Severity: BLOCKER and MAJOR go in the main list. Put MINOR in a separate list of at most 5 items, the rest as one line "N more nits".
  • Do not reject visuals "by taste" when the spec has no measurable criterion. Propose a criterion in the report instead.
  • For visual or motion batches, add a coverage table against the owner's last 5 complaints on that object.
  • Verdict words: build-safe, demo-safe, blocked. A code review never says 'can go to the owner'.

Design review mode

For assembled Figma screens or blocks, adaptives and layout code. This is the gate before the owner, who judges every screen they see as finished design.

  • Read the Figma nodes yourself with get_screenshot at 1x and 2x, never only builder renders; batch the calls (the Figma MCP allows about 10 a minute shared by all agents).
  • Owner-edit table from the round brief (~/.claude/templates/design-round.md): one row per E-id, done / not done / extra. Any unrequested change is MAJOR.
  • Gates from the figma-craft skill: untouched.js diff nonzero = BLOCKER; hygiene.js counts outside decor = MAJOR. Run them yourself if the builder report has no counts.
  • UX bar: one first look; one accent per card; 3-4 cards visible in a row; paddings equal within 1 px; hover visible; real content; the block's own styling.
  • Adaptives: compare 768, 390 and 320 with desktop element by element (an element, glow or decor present in one and not the other is MAJOR).
  • Product art: check against the acceptance checklist of the project's art guide, when the brief names one.
  • Layout code: compare with the Figma frame at the same width. Motion: load the review-animations skill and judge against it and the project's motion notes.
  • Skills: figma:figma-use and figma-craft before running the gates; layout code adds impeccable (critique for UX, audit for accessibility and responsive). The bar is the spec, the DS and the canon; taste skills stay unloaded.
  • Verdicts: owner-ready, fix, blocked.

Write the report in English to the file named in the brief: findings by severity, each with evidence and a suggested fix. Reply to the orchestrator: at most 15 lines with the BLOCKER, MAJOR and MINOR counts and the top 3 findings.

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. 17d ago First seen · 33 lines · 105 tokens per session scan A f6bf053d3dd8

Subscribe to this mod's changes

reviewer is an agent published in the GitHub repository mrDesign-ww/vault-os (3 stars, last pushed 10d ago), licensed MIT. It adds 105 tokens to every session and 917 once invoked, about $0.0004 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 2026-10-21.

Related

reviewer compared with agents from other repositories

reviewer next to 6 agents from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
reviewermrDesign-ww/vault-osAgent310d agoMITA105Claude Code
build-failure-analystdotnet/skillsAgent5.8ktodayMITA108Claude Code
swiftui-performance-analyzerCharlesWiltgen/AxiomAgent1.3k2d agoMITA45Claude Code
review-obsidian-guidelinesuphy/obsidian-reminderAgent6622d agoMITA63Claude Code
predictive-analystsoftspark/ai-toolkitAgent179yesterdayApache-2.0A35Claude Code
fec-ui-checkerbovinphang/frontend-craftAgent22yesterdayMITA89Claude Code
detectivenxtg-ai/forge-pluginAgent7yesterdayMITA473Claude Code