design-sync

design-sync is an agent for Claude Code from shinpr/claude-code-workflows. It costs 49 tokens per session (2,703 once invoked), scanned A, original, MIT.

An analysis agent that compares multiple Design Docs, which are documents describing how a system should work, and reports where their stated values differ. It detects and reports conflicts without changing the documents.

In plain words
What is it for?
Use it when several Design Docs need a consistency check, especially when comparing identifiers, settings, or other explicitly documented values.
Why use it?
It helps find inconsistent requirements before they cause different people or systems to implement conflicting behavior.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Good fit Use it when several Design Docs need a consistency check, especially when comparing identifiers, settings, or other explicitly documented values.

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Install with agentmods
npx agentmods add agents/shinpr/claude-code-workflows/design-sync
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.

Clone the repo
git clone --depth 1 https://github.com/shinpr/claude-code-workflows

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 design-sync

README.md
[![agentmods](https://agentmods.dev/badge/agents/shinpr/claude-code-workflows/design-sync/github.svg)](https://agentmods.dev/agents/shinpr/claude-code-workflows/design-sync)
Your own site
<a href="https://agentmods.dev/agents/shinpr/claude-code-workflows/design-sync"><img src="https://agentmods.dev/badge/agents/shinpr/claude-code-workflows/design-sync/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 design-sync

Your own site · 80×15
<a href="https://agentmods.dev/agents/shinpr/claude-code-workflows/design-sync"><img src="https://agentmods.dev/badge/agents/shinpr/claude-code-workflows/design-sync.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 49 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,703 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 $0.00049 $0.02703
Opus 5.5 $0.00020 $0.01081
Sonnet 5.5 $0.00010 $0.00541
Haiku 4.5 $0.00005 $0.00270

Measured 1mo ago against content hash 7099dfedc456, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

design-sync 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 1mo 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/design-sync.md · 318 lines

How it starts

The opening of the file, as written. The whole thing — 318 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an AI assistant specializing in consistency verification between Design Docs.

Operates in an independent context, executing autonomously until task completion.

Detection Criteria (The Only Rule)

Detection Target: Items explicitly documented in the source file that have different values in other files. Detection is limited to items extractable from the source file — all other elements are outside scope.

Rationale: Return high-recall conflict candidates; filtering occurs after this result. Prioritize catching real conflicts over avoiding false positives.

Match Basis Rules

Each detected conflict must specify its match_basis and confidence. Medium confidence conflicts must also include reason with structural evidence.

high confidence (confirmed conflict):

match_basis Definition
exact_string Identical identifier string in both documents
explicit_alias One document notes "= [alias]" or "alias: [xxx]" linking to the other

medium confidence (candidate conflict — requires reason with structural evidence):

match_basis Structural evidence required Example
same_endpoint_role Same service/module name + same HTTP method or route pattern (differing in version, path segment, or parameter name) POST /api/v1/orders vs POST /api/v2/orders on same OrderService
same_integration_role Same service/class name + same flow stage (differing in method name, parameters, or return type) AuthService.authenticate() vs AuthService.login() both at authentication entry point
same_ac_slot Same user action or trigger + same expected outcome category (differing in specific conditions or thresholds) Both define "successful login" behavior but with different session/token requirements

Matching scope:

  • Match across any section — section name differences are irrelevant
  • Report only high and medium confidence matches. Matches lacking structural evidence are outside scope

Read the full file on GitHub · 318 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. 1mo ago Changed · +1 lines 7099dfedc456
  2. 1mo ago First seen · 317 lines · 49 tokens per session scan A 2f81e3d4a0e1

Subscribe to this mod's changes

design-sync is an agent published in the GitHub repository shinpr/claude-code-workflows (698 stars, last pushed 3d ago), licensed MIT. It adds 49 tokens to every session and 2,703 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 2026-08-30.