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 agentmods add skills/resonatehq/resonate-skills/resonate-basic-debugging-javanpx skills add resonatehq/resonate-skills --skill resonate-basic-debugging-javagit clone --depth 1 https://github.com/resonatehq/resonate-skillsWhat 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 | $0.00104 | $0.03093 |
| Opus 5 | $0.00052 | $0.01546 |
| Sonnet 5 | $0.00021 | $0.00619 |
| Haiku 4.5 | $0.00010 | $0.00309 |
Grade A, and why
resonate-basic-debugging-java 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 2d 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 — 234 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Resonate Basic Debugging — Java
Prerelease note.
resonate-sdk-javais published on Maven Central — pinio.resonatehq:resonate-sdk-java:0.1.1. The API mirrors the Python SDK and may change before a stable1.0. Requires Java 21+ — the SDK uses virtual threads, a feature generally available in Java 21. Every code block here is compile-verified against0.1.1with a Java 21 toolchain, and cross-checked against theresonatehq-examples/*-javarepos anddevelop/java.mdx(docs PR #230).
Overview
Java's type system catches many bugs at compile time — typed method references and a typed ResonateHandle close off whole classes of error the dynamically-typed SDKs hit. The traps that remain are mostly at the durability boundary: untyped-handle decoding, CLI argument binding, replay double-fires, and the by-name-only constraints. This skill is a symptom-first guide to those failure modes.
For the language-agnostic replay and recovery mental model, read durable-execution first.
Triage flow
- Does it even build / start? Confirm a Java 21+ toolchain — the SDK uses virtual threads and will not run on Java 8/11/17.
- Is the worker connected? Confirm the builder's
url(...)(orRESONATE_URL) points at a running server, andrwas built without throwing. - Is the function registered? By-name dispatch (
rpc, the CLI) needsr.register(Owner::fn)on the executing group. - Is the promise stuck? Run
resonate promise get <id>to check state (pending/resolved/rejected/timedout). - Is the workflow replaying but producing duplicates? An un-checkpointed side effect is re-running above a durable boundary.
- Is a CLI-invoked function arity-mismatching? Each
--argbinds to one positional parameter. - Is the worker up but not picking up work?
r.stop()may have been called on a live worker.
Stuck / never-resuming workflows
Latent promise never settled
Symptom: future.await() blocks indefinitely; resonate promise get <id> shows state pending.
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.
- 2d ago First seen · 234 lines · 104 tokens per session scan A c18ca7ebddf4
resonate-basic-debugging-java is a skill published in the GitHub repository resonatehq/resonate-skills (6 stars, last pushed 11d ago), licensed Apache-2.0. It adds 104 tokens to every session and 3,093 once invoked, about $0.0005 per session on Opus 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.
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