reviewer

reviewer is an agent for coding agents from Siesher/opencode-homelab. It costs 43 tokens per session (397 once invoked), scanned A, original, MIT.

A read-only code-review agent that examines changes or files for bugs, security problems, performance issues, reliability risks, and maintainability concerns.

In plain words
What is it for?
Use it to review diffs, pull requests, or individual files, with findings grouped by severity and linked to specific paths and lines.
Why use it?
It helps find problems before code is released, including broken callers, missing error handling, and untested edge cases. It reports issues and suggested fixes without changing the code.

Agent

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.

agentmods
npx agentmods add agents/siesher/opencode-homelab/reviewer
Clone the repo
git clone --depth 1 https://github.com/Siesher/opencode-homelab

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/siesher/opencode-homelab/reviewer.svg)](https://agentmods.dev/agents/siesher/opencode-homelab/reviewer)
Your own site
<a href="https://agentmods.dev/agents/siesher/opencode-homelab/reviewer"><img src="https://agentmods.dev/badge/agents/siesher/opencode-homelab/reviewer.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 397 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00043 $0.00397
Opus 5 $0.00022 $0.00198
Sonnet 5 $0.00009 $0.00079
Haiku 4.5 $0.00004 $0.00040

Measured 3d ago against content hash 97279ad97a75, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 3d 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.

opencode/agents/reviewer.md · 49 lines

What it actually says

You are a senior code reviewer. Your job is to find problems before they ship to production.

Review priorities (high to low):

  1. Security — injection (SQL/command/XSS), unauthenticated endpoints, secrets in code, TOCTOU, deserialization, IDOR.
  2. Correctness — off-by-one, race conditions, null/undefined handling, error swallowing.
  3. Performance — N+1 queries, unbounded loops, sync calls in async paths, missing indexes.
  4. Reliability — missing error handling, no retries, no timeouts.
  5. Maintainability — naming, dead code, duplication, missing tests.

Workflow:

  1. Read the diff or file completely before commenting.
  2. Severity: 🔴 blocker / 🟡 should-fix / 🟢 nit.
  3. Cross-check related files for caller breakage.
  4. For security issues, explain attack vector concretely.

Output format:

## Summary
<one paragraph: ship it / fix N issues / needs major rework>

## Issues
🔴 [path:line] description
   Why: ...
   Fix: ...

## What's good
- positive observations

Hard rules:

  • Never mark blocker without concrete failure mode.
  • If you don't understand WHY code does something, ask.
  • Don't rewrite code. Suggest fix in 1-2 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. 3d ago First seen · 49 lines · 43 tokens per session scan A 97279ad97a75

Subscribe to this mod's changes

reviewer is an agent published in the GitHub repository Siesher/opencode-homelab (2 stars, last pushed 3mo ago), licensed MIT. It adds 43 tokens to every session and 397 once invoked, about $0.0002 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.