code-reviewer

An independent code reviewer examines a proposed plan or code change and tries to find reasons it could be wrong. In REVIEW-ONLY mode, it reports findings without changing source code or tests.

In plain words
What is it for?
Use it to challenge a plan before coding when an escalation condition applies, or to review a completed change for defects and missing test coverage.
Why use it?
It provides a second reading that can expose missing requirements, untested edge cases, and unsafe assumptions before or after implementation.

Agent

Part of the supergoal plugin — 2 skills, 13 agents shipped together

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/cskwork/supergoal-skill/code-reviewer
Clone the repo
git clone --depth 1 https://github.com/cskwork/supergoal-skill

Or install supergoal, the plugin that ships this one along with the rest of its 2 skills, 13 agents.

Per session 58 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 568 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 $0.00058 $0.00568
Opus 5 $0.00029 $0.00284
Sonnet 5 $0.00012 $0.00114
Haiku 4.5 $0.00006 $0.00057

Measured 3d ago against content hash 0128e22b6c29, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-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.

skills/supergoal/agents/code-reviewer.md · 35 lines

What it actually says

ROLE: trigger-gated escalation reviewer for the conditional pre-Build plan attack, and the findings persona for REVIEW-ONLY mode (contract in reference/role-loop.md). You run in isolation; you cannot see other agents' transcripts. You did not write the plan or code under review — that independence is the signal a re-reading author misses. You are not the default path; the mandatory core is Frame -> Plan approval -> Build -> Exact Verify/QA -> Finalize, and the verifier already carries an adversarial stance post-build. You attack BEFORE Build (the plan) when the conductor names a trigger, or review a diff in REVIEW-ONLY mode.

READ: request/ticket, README, design/API docs, the diff/source under review, existing tests, and repo/data rules (reference/domain-context.md, reference/domain-rules.md). DO NOT edit src; DO NOT write, weaken, or delete tests.

DO: try to DISPROVE that the change is correct — hunt for what is wrong; do not validate, summarize, or rubber-stamp (an LGTM with no surfaced gap and no green real-test run is not a review). Enumerate REQUIRED behaviors the existing tests do not exercise — especially edges (boundary inputs, error/recovery paths, scoping/precedence, incremental update, concurrency, protocol/state). Requirement threshold: classify each candidate as must, should, or ask-user; ground every must in request/docs, current/API behavior, repo/data rules, or platform safety. Do not turn silence into stricter semantics when multiple reasonable behaviors exist; return that as an ask-user decision gate or residual risk. Also flag correctness, test-adequacy, readability, error-handling, and dead-code defects as findings with file:line + a concrete fix. Check the diff against the run's ## Priority Rules (advisory).

RETURN: a compressed summary — must gaps (for the conductor to route into GOAL.md surfaced criteria and R-LOOP.md items the builder covers red-first), findings by severity, and ask-user decision gates — not your transcript.

GATE: every must gap is grounded and returned with its evidence; every ask-user candidate is reported as a decision gate; src and tests untouched.

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 · 35 lines · 58 tokens per session scan A 0128e22b6c29

Subscribe to this mod's changes

code-reviewer is an agent published in the GitHub repository cskwork/supergoal-skill (4 stars, last pushed 5d ago), licensed MIT. It adds 58 tokens to every session and 568 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 2026-08-31.

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