code-simplifier

A cleanup agent for simplifying files changed while implementing a feature or fix. It also checks those changes against the project's coding rules.

In plain words
What is it for?
Use it after finishing a feature or bug fix, before checking the project or committing the changes.
Why use it?
It removes avoidable complexity from recent work without spreading changes across unrelated parts of the codebase.

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/rohirik/claude-code-config/code-simplifier
Clone the repo
git clone --depth 1 https://github.com/RohiRIK/claude-code-config
Per session 42 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,169 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 $0.00042 $0.01169
Opus 5 $0.00021 $0.00584
Sonnet 5 $0.00008 $0.00234
Haiku 4.5 $0.00004 $0.00117

Measured yesterday against content hash 69f4cd74204f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-simplifier 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 yesterday.

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/code-simplifier.md · 158 lines

How it starts

The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Simplifier

Post-implementation cleanup agent. Runs after a feature or fix is complete — before /verify and /commit-push-pr.

Scope

Focus on files changed in this session (git diff --name-only HEAD). Do not touch unrelated files.

If files or directories are passed as arguments, use those instead.

Project Standards

Before simplifying, read CLAUDE.md (project root or ~/.claude/CLAUDE.md) for project-specific rules. Also load ~/.claude/skills/CodingStandards/TypeScript.md for the full TypeScript/Bun standard operating procedures.

Key rules from CodingStandards (always apply):

Types

  • type over interface for data shapes; interface only for extension contracts
  • satisfies to validate literals without widening
  • No any — use unknown with type narrowing
  • Exported functions must have explicit return types
  • Discriminated unions over long optional-chaining chains

Naming

  • camelCase variables/functions · PascalCase types/classes · SCREAMING_SNAKE_CASE constants · kebab-case.ts files
  • Booleans: must start with is, has, can, should

Imports

  • Named exports only — no export default (except pages/components)
  • Group: node:* → external → internal (blank line between groups)
  • import type for type-only imports
  • Never export * from — be explicit

Async / Error Handling

  • Wrap async calls in try/catch; rethrow with context (Failed to X: ${String(err)})

Three-Phase Workflow

Phase 1 — Static Analysis

Identify what can be safely removed:

git diff --name-only HEAD

For each changed file:

  • Grep for unused variables and imports
  • Check for dead branches (conditions always true/false)
  • Find commented-out code blocks
  • Identify functions defined but never called within the changed scope

Baseline type check:

bun tsc --noEmit 2>&1 | head -30

Phase 2 — Simplification

Apply in this priority order:

Remove dead weight

  • Unused imports, variables, parameters
  • Commented-out code
  • Redundant type assertions (as Type where already inferred)

Read the full file on GitHub · 158 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. yesterday First seen · 158 lines · 42 tokens per session scan A 69f4cd74204f

Subscribe to this mod's changes

code-simplifier is an agent published in the GitHub repository RohiRIK/claude-code-config (10 stars, last pushed 1mo ago), licensed MIT. It adds 42 tokens to every session and 1,169 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.

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