review-codebase-analysis

review-codebase-analysis is a skill for Claude Code, Codex from tomzx/agents. It costs 35 tokens per session (1,357 once invoked), scanned A, original, MIT.

A review process for checking whether a codebase analysis accurately covers the parts of a project affected by a proposed change.

In plain words
What is it for?
Checking component coverage, behavior claims, changeability assessments, and migration or impact analysis against the actual code.
Why use it?
It reduces the risk of planning changes from incorrect assumptions or missing dependencies.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Checking component coverage, behavior claims, changeability assessments, and migration or impact analysis against the actual code.

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Install with agentmods
npx agentmods add skills/tomzx/agents/review-codebase-analysis
View source ↗ tomzx/agents
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.

Any agent
npx skills add tomzx/agents --skill review-codebase-analysis
Clone the repo
git clone --depth 1 https://github.com/tomzx/agents

Made for: Claude Code, Codex.

Wrote this? Show the measurements

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README.md
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Your own site
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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 review-codebase-analysis

Your own site · 80×15
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Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,357 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 $0.00035 $0.01357
Opus 5 $0.00017 $0.00678
Sonnet 5 $0.00007 $0.00271
Haiku 4.5 $0.00003 $0.00136

Measured 6d ago against content hash 278f138bc147, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

review-codebase-analysis 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 6d 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/review-codebase-analysis/SKILL.md · 123 lines

How it starts

The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Review Codebase Analysis

Audits a codebase analysis and reports findings across five categories: coverage, accuracy, changeability rigor, and impact and migration completeness. The review verifies that the analysis describes the real code (not assumptions) and that every change disposition is justified and de-risked.

Prerequisites

  • Apply the shared SDLC conventions in skills/sdlc/references/shared.md.
  • If no argument is provided, locate the feature directory under .sdlc/features/ whose frontmatter issue field references $ISSUE_NUMBER.
  • .sdlc/features/N-<slug>/codebase-analysis.md, or an analysis document provided in context or as a file path
  • .sdlc/features/N-<slug>/requirements.md (optional, improves coverage analysis)

Steps

  1. Read the analysis from .sdlc/features/N-<slug>/codebase-analysis.md if present, otherwise from context or as a file path.
  2. Cross-reference against the requirements document if available: every requirement that implies a code change should map to an analyzed component.
  3. Spot-check the analysis against the actual codebase to confirm behavior claims and paths.
  4. Identify issues in each of the categories below.
  5. Report findings. Omit any category that has no findings.
  6. Write the findings to .sdlc/features/N-<slug>/review-codebase-analysis.md with frontmatter artifact: codebase-analysis, verdict (approved if there are no blocking findings, changes-requested if the author must address findings, rejected for a fundamental flaw), and reviewed_at: <ISO date>, and the findings as the body, per skills/sdlc/references/shared.md. Record any unresolved open questions in the findings body. For any question that carries meaningful risk, also invoke /create-assumption to record it formally. For a chosen change disposition with lasting consequences (e.g. replace vs. extend), invoke /create-decision.

Review Checklist

Coverage

  • Does the analysis address every requirement that implies a change to existing code, or are touched components missing?
  • Are the search entry points recorded (queries, paths) so the scope is auditable?
  • For a greenfield verdict, is the integration boundary (where it attaches to existing systems) actually empty, or was existing code overlooked?

Read the full file on GitHub · 123 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. 6d ago First seen · 123 lines · 35 tokens per session scan A 278f138bc147

Subscribe to this mod's changes

review-codebase-analysis is a skill published in the GitHub repository tomzx/agents (6 stars, last pushed yesterday), licensed MIT. It adds 35 tokens to every session and 1,357 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 2026-09-03.