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.
git clone --depth 1 https://github.com/lsampaioweb/ai-instructionsWrote 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.
[](https://agentmods.dev/rules/lsampaioweb/ai-instructions/spring-boot-async)<a href="https://agentmods.dev/rules/lsampaioweb/ai-instructions/spring-boot-async"><img src="https://agentmods.dev/badge/rules/lsampaioweb/ai-instructions/spring-boot-async/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.
<a href="https://agentmods.dev/rules/lsampaioweb/ai-instructions/spring-boot-async"><img src="https://agentmods.dev/badge/rules/lsampaioweb/ai-instructions/spring-boot-async.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00000 | $0.00568 |
| Opus 5.5 | $0.00000 | $0.00227 |
| Sonnet 5.5 | $0.00000 | $0.00114 |
| Haiku 4.5 | $0.00000 | $0.00057 |
Grade A, and why
spring-boot-async 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 14d 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.
How it starts
The opening of the file, as written. The whole thing — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Spring Boot Async Contract
Apply this contract when the application uses Spring @Async (background methods
or async event listeners). Virtual-thread enablement stays in the virtual-threads
contract. Application-event when to listen async stays in the events contract;
this file owns @EnableAsync and how @Async methods behave.
Architecture owns feature packages and constructor injection. Controller owns REST boundaries. Logging and i18n own log keys. Exception handling owns API error mapping.
Enablement
- Add
@EnableAsyncon the Spring Boot application class when any@Asyncmethod or async@EventListenerexists. - Do not add a custom
TaskExecutorbean unless the product needs a named executor beyond Boot's default (virtual-threads contract).
@Async methods
- Put
@Asyncon Spring-managed beans called through the container proxy (for example a dedicated worker bean). Self-invocation on the same class does not run asynchronously. - Prefer
@Asyncfor work that should leave the request thread (for example job processing or blocking/latency-sensitive listeners). Keep trivial in-memory reactions synchronous (events contract). - Return
CompletableFuture(or anotherCompletionStage) when the caller must observe completion (for example a worker method completed viawhenCompletein the service). - Do not put
@Asyncon REST controller methods.
Request-scoped async jobs
When HTTP clients submit work that finishes later:
- Accept the job in the service, start the
@Asyncworker, and return quickly (for example202 Acceptedwith aLocationto a status resource). - Track lifecycle in a feature store (for example queued → running → succeeded/failed).
- Surface executor rejection as a feature exception (for example
TaskRejectedExceptionmapped to a domain submission-rejected exception). - Record failures from the completion callback; do not leave jobs stuck in running forever after worker errors.
Forbidden
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.
- 14d ago First seen · 59 lines · 0 tokens per session scan A 83c875e97a03
spring-boot-async is a cursor rule published in the GitHub repository lsampaioweb/ai-instructions (1 stars, last pushed 14d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 568 tokens. 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 2026-10-04.
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