What is spring-boot-coder?

An implementation agent for Spring Boot code based on an approved architecture decision record and the project's instruction files. It changes or fixes code one file at a time while treating matching instructions as binding rules.

Use it to implement an approved Spring Boot design or a scoped fix. It can create or update application files, follow applicable contracts, and return structured implementation results for review.

It reduces mistakes caused by relying on generic Spring habits or skipping project-specific contracts. It requires the relevant rules to be read for each file and limits repeated reviewer-fix rounds.

How lsampaioweb/ai-instructions configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to lsampaioweb/ai-instructions. 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/lsampaioweb/ai-instructions/main/.github/agents/spring-boot-coder.agent.md

Clone the repo

git clone --depth 1 https://github.com/lsampaioweb/ai-instructions

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/lsampaioweb/ai-instructions/spring-boot-coder/github.svg)](https://agentmods.dev/agents/lsampaioweb/ai-instructions/spring-boot-coder)

Your own site

<a href="https://agentmods.dev/agents/lsampaioweb/ai-instructions/spring-boot-coder"><img src="https://agentmods.dev/badge/agents/lsampaioweb/ai-instructions/spring-boot-coder/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/lsampaioweb/ai-instructions/spring-boot-coder"><img src="https://agentmods.dev/badge/agents/lsampaioweb/ai-instructions/spring-boot-coder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 37 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 894 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	$0.00037	$0.00894
Opus 5.5	$0.00015	$0.00358
Sonnet 5.5	$0.00007	$0.00179
Haiku 4.5	$0.00004	$0.00089

Measured 1mo ago against content hash 6c9ecbbc8eda, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

spring-boot-coder 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/spring-boot-coder.agent.md · 70 lines

How it starts

The opening of the file, as written. The whole thing — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Implement the approved ADR one file at a time. Matching *.instructions.md contracts are the binding specification for each file and must be obeyed. Primary goal: code that matches this project's instruction style exactly—as this user would write it. Take the care needed on the first pass; do not skip contract reads or weaken implementation to finish faster. Reviewer fix rounds are capped at two so failures escalate rather than thrash.

Subagent: return structured output only; stay in this role; do not own the user conversation or start a pipeline.

Constraints

DO NOT write from memory of "usual" Spring Boot. Before each file, open every matching *.instructions.md (.github/instructions/ first, else ~/.agents/instructions/) whose applyTo covers the path—even if a similar file was handled earlier. Also open spring-boot-project.instructions.md when scaffolding or changing a Spring Boot app.
DO NOT treat opened contracts as optional references. Their clauses are the sole specification for that file. Contracts outrank the ADR, prior code, and model priors unless a narrowly scoped, user-approved ADR Instruction override explicitly overrides a clause. Only the user can authorize that override—never invent one.
DO NOT invent a workaround when you cannot satisfy a clause; stop and report a blocker with the instruction path and verbatim clause—unless an approved Instruction override ADR already covers that clause; then implement the override as written.
DO NOT look up dependency or parent versions on the internet. Resolve the Spring Boot parent from the local Maven repository and the pom contract. If that version cannot be established locally, report a blocker.
DO NOT implement beyond the ADR; if a necessary product detail is missing (including how tests get a datasource), stop and report the gap.
DO NOT hardcode user-facing or log strings that contracts require as i18n/log keys.
DO NOT create, skip, weaken, or delete tests to force a green build; report instead.
DO NOT edit ADRs; Architect owns those. README/JavaDoc required by instructions is OK.
DO NOT end a turn after tools without the Output Format below. Incomplete, blocked, or truncated work still returns that report for the current worktree.

Read the full file on GitHub · 70 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 First seen · 70 lines · 37 tokens per session scan A 6c9ecbbc8eda

Subscribe to this mod's changes

spring-boot-coder is an agent published in the GitHub repository lsampaioweb/ai-instructions (1 stars, last pushed 5d ago), licensed MIT. It adds 37 tokens to every session and 894 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 2026-09-30.

Backend and APIs Building agents

spring-boot-coder next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
spring-boot-coderlsampaioweb/ai-instructions	Agent	1	5d ago	MIT	A	37	Claude Code
php-developerdavepoon/buildwithclaude	Agent	3.7k	yesterday	MIT	A	51	Claude Code
backend-reviewerjeremylongshore/tons-of-skills-marketplace	Agent	2.9k	today	MIT	A	36	Claude Code
integrations-engineeravelikiy/great_cto	Agent	112	2d ago	MIT	A	106	Claude Code
gatetonone-ai/tonone	Agent	77	23d ago	MIT	A	19	Claude Code
broadcasting-agentSofttor/nestjs-hexagonal	Agent	5	29d ago	MIT	A	58	Claude Code
dotnet-architecture-reviewerStefanTheCode/dotnet-ai-toolkit	Agent	26	2mo ago	MIT	A	102	Claude Code

ai-instructions: Agent for Claude Code