deep-code-reviewer

deep-code-reviewer is a skill for Claude Code, Codex from conectlens/lenserfight. It costs 95 tokens per session (1,026 once invoked), scanned A, original, MIT.

A thorough code-review method that examines correctness, concurrency, performance, security, types, and long-term maintainability.

In plain words
What is it for?
Use it for deep reviews, architecture critiques, and finding high-impact bugs with concrete file references.
Why use it?
It catches problems that a quick review may miss by tracing surrounding code, data flow, state changes, and failure paths.

Skill for Claude CodeCodex

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 skills/conectlens/lenserfight/deep-code-reviewer
Any agent
npx skills add conectlens/lenserfight --skill deep-code-reviewer
Clone the repo
git clone --depth 1 https://github.com/conectlens/lenserfight

Made for: Claude Code, Codex.

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 deep-code-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/skills/conectlens/lenserfight/deep-code-reviewer.svg)](https://agentmods.dev/skills/conectlens/lenserfight/deep-code-reviewer)
Your own site
<a href="https://agentmods.dev/skills/conectlens/lenserfight/deep-code-reviewer"><img src="https://agentmods.dev/badge/skills/conectlens/lenserfight/deep-code-reviewer.svg" alt="Measured on agentmods" height="20"></a>
Per session 95 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,026 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 $0.00095 $0.01026
Opus 5 $0.00048 $0.00513
Sonnet 5 $0.00019 $0.00205
Haiku 4.5 $0.00010 $0.00103

Measured 5d ago against content hash 99517ba57146, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

deep-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 5d 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.

.agents/skills/deep-code-reviewer/SKILL.md · 111 lines

How it starts

The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Deep Code Reviewer

Perform review as an auditor, not as a summarizer. Prioritize findings that can cause incorrect behavior, operational pain, or expensive future changes.

Quick Start

  1. Establish scope before judging details.
  2. Inspect surrounding code, not just the diff or pasted snippet.
  3. Trace data flow, control flow, state transitions, and failure paths.
  4. Produce findings ordered by severity with concrete file references.
  5. Keep summaries brief and secondary to the findings.

Review Workflow

1. Build Context

Read enough code to understand:

  • Entry points and callers
  • State ownership and mutation boundaries
  • Invariants that must always hold
  • External dependencies: databases, queues, caches, RPCs, files, clocks, feature flags
  • Existing tests and what they do not cover

If the change touches a framework or subsystem with non-obvious behavior, read the local docs or implementation that defines the contract before concluding.

2. Hunt for High-Impact Failures First

Check for:

  • Incorrectness: broken invariants, off-by-one logic, missing validation, bad error handling, partial updates
  • Concurrency hazards: races, duplicate work, lost updates, stale reads, deadlocks, non-atomic sequences
  • Security flaws: authorization gaps, trust-boundary violations, secret leakage, injection vectors
  • Data integrity issues: transaction gaps, mismatched schemas, silent truncation, incompatible migrations
  • Performance cliffs: N+1 queries, unnecessary allocations, hot-loop work, unbounded retries, lock contention
  • Type-safety holes: unsafe casts, invalid narrowing, nil/null handling gaps, unsound generics, unchecked parsing
  • Operational risks: weak observability, bad retry semantics, missing idempotency, unsafe rollout assumptions

3. Evaluate Architecture and Design

Judge whether the design makes future failures likely even if the current code appears correct.

Look for:

  • Responsibilities split across the wrong boundaries
  • APIs that hide important invariants or encourage misuse
  • Tight coupling to volatile details
  • Configuration or feature-flag logic that creates invalid states
  • Missing abstractions where duplication is already diverging
  • Premature abstractions that make correctness harder to reason about

Read the full file on GitHub · 111 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 5d ago First seen · 111 lines · 95 tokens per session scan A 99517ba57146

Subscribe to this mod's changes

deep-code-reviewer is a skill published in the GitHub repository conectlens/lenserfight (19 stars, last pushed 25d ago), licensed MIT. It adds 95 tokens to every session and 1,026 once invoked, about $0.0005 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 2026-08-30.

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