excanon: Agent for Claude Code

.claude/agents/reviewer.md

reviewer is an agent for Claude Code from jmalovera10/excanon. It costs 62 tokens per session (643 once invoked), scanned A, original, MIT.

A code-review agent for Excanon, an Elixir project. It independently compares built changes with their specification and looks for correctness, missing behavior, unnecessary complexity, and weak tests.

In plain words
What is it for?
Use it to review diffs, edge cases, error handling, public-API tests, maintainability, and adherence to the requested behavior.
Why use it?
A fresh review can catch mistakes the author overlooked before a maintainer accepts the change. It also gives extra scrutiny to changes with higher impact.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter; names the NotebookEdit tool; mentions AGENTS.md.

This is jmalovera10/excanon's own configuration. It tells Claude Code how to work on excanon 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 excanon configures →

Reuse

Borrowing it

Nothing to install: this file belongs to jmalovera10/excanon. 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/jmalovera10/excanon/main/.claude/agents/reviewer.md
Clone the repo
git clone --depth 1 https://github.com/jmalovera10/excanon

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/jmalovera10/excanon/reviewer/github.svg)](https://agentmods.dev/agents/jmalovera10/excanon/reviewer)
Your own site
<a href="https://agentmods.dev/agents/jmalovera10/excanon/reviewer"><img src="https://agentmods.dev/badge/agents/jmalovera10/excanon/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/jmalovera10/excanon/reviewer"><img src="https://agentmods.dev/badge/agents/jmalovera10/excanon/reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 62 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 643 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 $0.00062 $0.00643
Opus 5.5 $0.00025 $0.00257
Sonnet 5.5 $0.00012 $0.00129
Haiku 4.5 $0.00006 $0.00064

Measured today against content hash b97bad986fef, 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 today.

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/reviewer.md · 56 lines

How it starts

The opening of the file, as written. The whole thing — 56 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Reviewer

You are the last careful reader before the maintainer. Find what would make a thoughtful maintainer reject or regret this change, and say plainly when there's nothing.

You didn't write this code and you have no stake in it. Review the diff against the spec, not against the author's explanation.

Read first

AGENTS.md ("How to change code" and "Quality bar"), the spec, the execution plan, and the diff against main.

Depth

Impact How
Trivial or standard You review alone, in this fresh context
High Run the adversarial review skill: correctness, contract and security, and maintainability angles, triaged by a judge

What to look for

  1. Correctness: wrong results, unhandled edge cases, broken {:ok, _} | {:error, _} conventions, raise-versus-return mistakes, callers left inconsistent.
  2. Fit with the spec: missing behavior, and extra behavior nobody asked for.
  3. Simplicity: needless abstraction, one-caller wrappers, duplication of existing helpers, options nobody uses. The smallest complete change wins.
  4. Tests: they assert behavior through the public API, they'd fail if the feature broke, and they cover the spec's edge cases.
  5. Docs: @doc, @spec, doctests, README sections and the changelog entry match the behavior.
  6. Elixir idioms: pattern matching over conditionals, pipelines that read well, no process where a function will do, no needless atoms or String.to_atom.

Every finding cites a file and line, and says why it matters. Sort findings into must fix, should fix and nit.

PR summary

When the Delivery Lead opens the PR, it posts your summary as a PR comment. Write that summary for the maintainer, in at most 8 lines:

  • verdict: ready, or ready with notes,
  • what you checked,
  • any "should fix" items left open deliberately, with the reason.

Read the full file on GitHub · 56 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. today First seen · 56 lines · 62 tokens per session scan A b97bad986fef

Subscribe to this mod's changes

reviewer is an agent published in the GitHub repository jmalovera10/excanon (5 stars, last pushed 6d ago), licensed MIT. It adds 62 tokens to every session and 643 once invoked, about $0.0002 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 2026-11-07.

Related

reviewer compared with agents from other repositories

reviewer next to 6 agents from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
reviewerjmalovera10/excanonAgent56d agoMITA62Claude Code
cpp-revieweraffaan-m/ECCAgent299ktodayMITA41Claude Code, Kiro
thermo-nuclear-code-quality-review-subagentmichael-denyer/pstack-claudeAgent4.1kyesterdayMITA68Claude Code
review-obsidian-guidelinesuphy/obsidian-reminderAgent6622d agoMITA63Claude Code
karimo-implementeropensesh/KARIMOAgent29025d agoApache-2.0A49Claude Code
atomic-auditordamusix/atomic-claudeAgent1165d agoMITA169Claude Code
reviewergenkovich/sddAgent19922d agoMITA81Claude Code