Borrowing it
Nothing to install: this file belongs to bernardladenthin/BitcoinAddressFinder. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/bernardladenthin/BitcoinAddressFinder/main/.claude/skills/tdd/SKILL.mdgit clone --depth 1 https://github.com/bernardladenthin/BitcoinAddressFinderWrote 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/bernardladenthin/bitcoinaddressfinder/tdd)<a href="https://agentmods.dev/skills/bernardladenthin/bitcoinaddressfinder/tdd"><img src="https://agentmods.dev/badge/skills/bernardladenthin/bitcoinaddressfinder/tdd/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/bernardladenthin/bitcoinaddressfinder/tdd"><img src="https://agentmods.dev/badge/skills/bernardladenthin/bitcoinaddressfinder/tdd.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 12 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00026 | $0.00578 |
| Opus 5.5 | $0.00010 | $0.00231 |
| Sonnet 5.5 | $0.00005 | $0.00116 |
| Haiku 4.5 | $0.00003 | $0.00058 |
Grade A, and why
tdd 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 20d 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 — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.
TDD — Test-Driven Development for BitcoinAddressFinder
You are working on BitcoinAddressFinder (group net.ladenthin, Java 21, Maven).
Generic Java TDD Guide
Follow all conventions from the generic Java TDD skill, which lives in the sibling workspace
repository at ../workspace/.claude/skills/java-tdd-guide/SKILL.md (this repository carries only
the marker .claude/skills/java-tdd-guide/SKILL.pointer.md; the workspace repo must be in the
session scope for the harness to load it). That guide covers:
- Red → Green → Refactor workflow
- File headers (Apache 2.0 license)
- Test framework stack (JUnit Jupiter, Hamcrest, Mockito)
- Test naming, AAA structure, editor folds
- Assertions (Hamcrest only), exception testing
- Parameterized tests (
@ParameterizedTest+@MethodSource), named constants, DRY - Logger injection (constructor over setter)
- Null safety (JSpecify + NullAway)
- Records, immutability, concurrency
- Import style, anti-patterns, completeness checklist
This repository targets Java 21, so also read the Java 21 supplements of the version chain:
../workspace/guides/test/TEST_WRITING_GUIDE-21.md and
../workspace/guides/src/CODE_WRITING_GUIDE-21.md (each extends its -8.md baseline).
Project-Specific Supplements
For BitcoinAddressFinder-specific conventions, also follow:
CODE_WRITING_GUIDE.md— BitHelper radix constants, C-prefix configuration POJOs, custom domain exceptions, graceful shutdown (Interruptable), lambda callbacksTEST_WRITING_GUIDE.md— Marker annotations (@AwaitTimeTest, @ToStringTest, @OpenCLTest), timing/await tests, static address constants (StaticKey, P2PKH, P2SH, P2WPKH), platform assumptions, LMDB/OpenCL test patterns, producer test helpers, socket test utilities
Package
net.ladenthin.bitcoinaddressfinder
Build & Test
There is no Maven Wrapper in this repository; use an installed mvn.
mvn compile # compile (NullAway enforced)
mvn test # run all tests (~5 minutes; prefer a narrowed -Dtest=... while iterating, see CLAUDE.md)
mvn test -Dnet.ladenthin.bitcoinaddressfinder.disableLMDBTest=true # skip LMDB tests
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.
- 20d ago Changed · +9 lines 4f1585845835
- 2mo ago First seen · 45 lines · 26 tokens per session scan A 0fac8ab5df8d
tdd is a skill published in the GitHub repository bernardladenthin/BitcoinAddressFinder (247 stars, last pushed yesterday), licensed Apache-2.0. It adds 26 tokens to every session and 578 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 2026-08-30.
Other skills, from other repositories
JUnit 5 Testing
Production-grade Java unit and integration testing with JUnit 5 covering assertions, parameterized tests, lifecycle hooks, Mockito mocking, nested tests, and extensions.
maven-harness-pom
Reference Maven POM fragments for the full harness — Spotless, Checkstyle, SpotBugs, Error Prone, JaCoCo, PIT, OpenAPI generator + diff, OWASP dependency check, Surefire/Failsafe. Use when wiring the harness into a new project or upgrading a brownfield POM.
archunit-rules
Encode architecture invariants as ArchUnit rules. Use when defining or reviewing layer boundaries, package dependencies, naming conventions, or cross-module access.
springboot-tdd
Test-driven development for Spring Boot using JUnit 5, Mockito, MockMvc, Testcontainers, and JaCoCo. Use when adding features, fixing bugs, or refactoring.
springboot-testing
Spring Boot testing discipline — TDD workflow with JUnit 5, @SpringBootTest slicing (@WebMvcTest, @DataJpaTest), MockMvc, Testcontainers, and the verification gates a Spring Boot change must pass before it ships (build, coverage floor, static analysis, integration checks). Use when writing Spring Boot tests or…
implement
Use when writing or changing production code for a ClaudeHut light- or full-route task in a Java/Spring project - test-first red-green-refactor, following task.md or the approved plan and the path-scoped project rules. Preloaded into claudehut-implementer.