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.
npx skills add joaquimscosta/arkhe-claude-plugins --skill spring-boot-observabilitygit clone --depth 1 https://github.com/joaquimscosta/arkhe-claude-pluginsWrote 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/skills/joaquimscosta/arkhe-claude-plugins/spring-boot-observability)<a href="https://agentmods.dev/skills/joaquimscosta/arkhe-claude-plugins/spring-boot-observability"><img src="https://agentmods.dev/badge/skills/joaquimscosta/arkhe-claude-plugins/spring-boot-observability/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/skills/joaquimscosta/arkhe-claude-plugins/spring-boot-observability"><img src="https://agentmods.dev/badge/skills/joaquimscosta/arkhe-claude-plugins/spring-boot-observability.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 | $0.00088 | $0.00850 |
| Opus 5.5 | $0.00035 | $0.00340 |
| Sonnet 5.5 | $0.00018 | $0.00170 |
| Haiku 4.5 | $0.00009 | $0.00085 |
Grade A, and why
spring-boot-observability 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 yesterday.
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 — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Spring Boot Observability
Production observability with Actuator endpoints, Micrometer metrics, and OpenTelemetry tracing.
Core Components
| Component | Purpose |
|---|---|
| Actuator | Health checks, info, metrics exposure, operational endpoints |
| Micrometer | Metrics abstraction (Timer, Counter, Gauge, DistributionSummary) |
| OpenTelemetry | Distributed tracing (default in Spring Boot 4) |
Core Workflow
- Add starters →
actuator,micrometer-registry-*,opentelemetry - Configure endpoint exposure → Secure sensitive endpoints
- Define health groups → Separate liveness from readiness
- Add custom metrics → Business-specific measurements
- Configure tracing → Sampling, propagation, export
Quick Patterns
See EXAMPLES.md for complete working examples including:
- Production Actuator Configuration with health groups and Kubernetes probes
- Custom Health Indicator with latency monitoring (Java + Kotlin)
- Custom Micrometer Metrics with Counter, Timer, and Gauge patterns
- OpenTelemetry Span Customization with Observation API
- OpenTelemetry Configuration for OTLP export
- Actuator Endpoint Access Control (Boot 4)
Spring Boot 4 Specifics
- OpenTelemetry is the default tracer (replaces Brave)
- Health Indicator imports from
org.springframework.boot.health.contributor.* - Endpoint Access Control with
access: none/unrestricted/read-only
Detailed References
- Examples: See EXAMPLES.md for complete working code examples
- Troubleshooting: See TROUBLESHOOTING.md for common issues and Boot 4 migration
- Actuator Endpoints: See references/ACTUATOR.md for endpoint configuration, security, custom endpoints
- Micrometer Metrics: See references/METRICS.md for Timer, Counter, Gauge, DistributionSummary patterns
- Distributed Tracing: See references/TRACING.md for OpenTelemetry, span customization, context propagation
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- yesterday First seen · 78 lines · 88 tokens per session scan A 96a18ed7789c
spring-boot-observability is a skill published in the GitHub repository joaquimscosta/arkhe-claude-plugins (21 stars, last pushed yesterday), licensed MIT. It adds 88 tokens to every session and 850 once invoked, about $0.0004 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 2026-10-16.
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