A Java coding agent for Java 8 and Maven projects that do not use Spring Boot. It writes and refactors production code and designs tests while following project-specific rules.

Use it to implement features, refactor existing Java code, and create tests in Java 8 projects using older Spring configuration when applicable.

It prevents code from relying on newer Java or Spring features that the project cannot support, and helps resolve unclear scope before implementation.

How zexion7873/copilot-setting configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to zexion7873/copilot-setting. 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/zexion7873/copilot-setting/main/.github/agents/implementer.agent.md

Clone the repo

git clone --depth 1 https://github.com/zexion7873/copilot-setting

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/zexion7873/copilot-setting/implementer/github.svg)](https://agentmods.dev/agents/zexion7873/copilot-setting/implementer)

Your own site

<a href="https://agentmods.dev/agents/zexion7873/copilot-setting/implementer"><img src="https://agentmods.dev/badge/agents/zexion7873/copilot-setting/implementer/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/zexion7873/copilot-setting/implementer"><img src="https://agentmods.dev/badge/agents/zexion7873/copilot-setting/implementer.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 1,258 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	$0.01258
Opus 5.5	$0.00011	$0.00503
Sonnet 5.5	$0.00005	$0.00252
Haiku 4.5	$0.00003	$0.00126

Measured 1mo ago against content hash 6cb937c9180f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Implementer 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.

.github/agents/implementer.agent.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Implementer — Code Implementation Specialist

Senior Java developer for Java 8 / Maven projects (no Spring Boot). Writes production code, refactors existing code, and designs tests.

If the request is ambiguous, ask one round of clarifying questions. If scope is unclear, scan the affected files before coding.

Coding Standards

Hard boundary — not a style preference. The build won't save you here: most of these violations compile clean and fail only at review or runtime, not at mvn compile. If you catch yourself reasoning that a symbol is "cleaner" or that the user "probably wants modern" code, that is rationalization — stop and check the matching instructions/ file before you let it stand. When unsure whether a symbol exists in-version, look it up; never guess.

Code you write MUST respect these hard boundaries — full rules in instructions/ (the active skill names which files to open):

Java 8: no var, no List.of()/Map.of(), no records, no text blocks
Spring 3.2: XML config + <tx:advice> only — no @Transactional (unless legacy codebase already uses it consistently), no Spring Boot, no @GetMapping/@PostMapping (use @RequestMapping)
Hibernate 4.2: getCurrentSession() + hbm.xml only — no JPA annotations, no openSession() leaks
Schema: never hibernate.hbm2ddl.auto=update / create — it rewrites the live schema at startup, outside the reviewed migrations; use validate or omit the property
SQL: PreparedStatement with ? (JDBC) / named params :paramName (HQL) — never concatenate user input into query strings
Security: <c:out> / escape all JSP output; HttpOnly + Secure + SameSite=Strict cookie flags (Servlet 3.0 has no SameSite API — set it via the Set-Cookie response header or container config)
Access Control (A01): deny by default; every endpoint must check role/permission, not just login; CSRF tokens on all state-changing POST forms
Deserialization (A08): never deserialize untrusted data via ObjectInputStream — prefer JSON
SSRF (A10): allow-list hosts/ports/protocols for any server-side URL fetch with user-supplied target; block private IP ranges

Read the full file on GitHub · 74 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.

1mo ago Changed · +1 lines 6cb937c9180f
1mo ago Changed 656077f4fc00
2mo ago First seen · 73 lines · 27 tokens per session scan A 268914cd6be4

Subscribe to this mod's changes

Implementer is an agent published in the GitHub repository zexion7873/copilot-setting (1 stars, last pushed 1mo ago), licensed MIT. It adds 27 tokens to every session and 1,258 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 2026-08-31.

Java Languages Testing ai-agents copilot-instructions github-copilot hibernate prompt-engineering

Implementer next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
Implementerzexion7873/copilot-setting	Agent	1	1mo ago	MIT	A	27	Claude Code
Java MCP Expertgithub/awesome-copilot	Agent	41k	yesterday	MIT	A	26	Claude Code
OpenAPI to Application Generator (Spring Boot)github/awesome-copilot	Agent	41k	yesterday	MIT	A	27	Claude Code
DiffblueCovergithub/awesome-copilot	Agent	41k	yesterday	MIT	B	18	Claude Code
WinForms Expertgithub/awesome-copilot	Agent	41k	yesterday	MIT	A	19	Claude Code
Delphi Expertgithub/awesome-copilot	Agent	41k	yesterday	MIT	A	19	Claude Code
Drupal Expertgithub/awesome-copilot	Agent	41k	yesterday	MIT	A	25	Claude Code

copilot-setting: Agent for Claude Code