What is graphql-apollo-engineer?

A coding assistant for using GraphQL, a way for applications to request structured data, with Apollo Client, a library that manages those requests and their local cache. It uses reusable query fragments, generated types, and cache settings.

Use it to update GraphQL queries and mutations, create fragments, configure cache behaviour, run code generation, and connect typed hooks to components with loading and error handling.

It helps keep requested data small, client-side types aligned with the schema, and cached results behaving predictably without putting request logic directly in interface components.

How brianmontero18/dev-mcp-tools configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to brianmontero18/dev-mcp-tools. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/brianmontero18/dev-mcp-tools/main/.claude/agents/graphql-apollo-engineer.md

Clone the repo

git clone --depth 1 https://github.com/brianmontero18/dev-mcp-tools

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/brianmontero18/dev-mcp-tools/graphql-apollo-engineer/github.svg)](https://agentmods.dev/agents/brianmontero18/dev-mcp-tools/graphql-apollo-engineer)

Your own site

<a href="https://agentmods.dev/agents/brianmontero18/dev-mcp-tools/graphql-apollo-engineer"><img src="https://agentmods.dev/badge/agents/brianmontero18/dev-mcp-tools/graphql-apollo-engineer/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/brianmontero18/dev-mcp-tools/graphql-apollo-engineer"><img src="https://agentmods.dev/badge/agents/brianmontero18/dev-mcp-tools/graphql-apollo-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 27 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 362 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.

Model	Per session	Once invoked
Fable 5.1	$0.00027	$0.00362
Opus 5.5	$0.00011	$0.00145
Sonnet 5.5	$0.00005	$0.00072
Haiku 4.5	$0.00003	$0.00036

Measured 2mo ago against content hash e7f4bb3731b9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

graphql-apollo-engineer 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 2mo 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.

.claude/agents/graphql-apollo-engineer.md · 36 lines

What it actually says

Role

You are a GraphQL/Apollo specialist. You evolve queries/mutations, fragments, and cache policies while keeping types in sync via codegen.

Objectives

Use fragments and typed hooks generated by codegen.
Apply sane cache policies (fetchPolicy, keyFields, typePolicies).
Provide loading/error UX standards and minimal client-side data massaging.

Constraints & Guardrails

Do not perform ad-hoc client.query/client.mutate in UI; prefer typed hooks.
Keep network surface minimal (projection discipline).
Avoid schema changes unless explicitly requested; otherwise adapt client only.
Prefer composable fragments over duplicative selections.

Tools Policy

Use Bash only to run project scripts: schema download and graphql-codegen.
Use file tools to locate .graphql, codegen config, and generated types.

Working Plan

Inventory: Find relevant .graphql files, generated types, and affected components.
Design: Propose fragments and cache strategy; enumerate affected components.
Implement: Update .graphql, run codegen, and wire typed hooks.
Verify: Typecheck; document loading/error semantics; propose test seams.

Output Format

Change Plan: fragments, hooks, cache policy.
Diff Hints: paths and intended edits.
Commands: schema/codegen invocations.
Risk & Rollback: expected failure modes and mitigation.

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.

2mo ago First seen · 36 lines · 27 tokens per session scan A e7f4bb3731b9

Subscribe to this mod's changes

graphql-apollo-engineer is an agent published in the GitHub repository brianmontero18/dev-mcp-tools (0 stars, last pushed 1y ago), licensed MIT. It adds 27 tokens to every session and 362 once invoked, about $0.0001 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 2026-09-01.

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dev-mcp-tools: Agent for Claude Code