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 uqeu/estelle-cli --skill test-firstgit clone --depth 1 https://github.com/uqeu/estelle-cliWrote 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/uqeu/estelle-cli/test-first)<a href="https://agentmods.dev/skills/uqeu/estelle-cli/test-first"><img src="https://agentmods.dev/badge/skills/uqeu/estelle-cli/test-first/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/uqeu/estelle-cli/test-first"><img src="https://agentmods.dev/badge/skills/uqeu/estelle-cli/test-first.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 | $0.00216 |
| Opus 5.5 | $0.00000 | $0.00086 |
| Sonnet 5.5 | $0.00000 | $0.00043 |
| Haiku 4.5 | $0.00000 | $0.00022 |
Grade A, and why
test-first 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.
What it actually says
test-first
Estelle's TDD skill. Quality by construction, not inspection.
Procedure
- Slice the work into the thinnest vertical tracer-bullet (one behavior end to end).
- Red — write the test for that slice first; run it; watch it fail for the right reason.
- Green — the minimal implementation to pass. Test behavior through the public interface, never internals.
- Refactor — improve with the test as a safety net; deepen the module (see
deepen-architecture). - Repeat slice by slice; keep coverage ≥ 80% (Estelle aims 100% on new pure cores).
Output
Working code with a test per behavior, coverage proven by the pytest summary line. Serves every feature/bugfix.
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 · 19 lines · 0 tokens per session scan A 7a030b4e2d1c
test-first is a skill published in the GitHub repository uqeu/estelle-cli (0 stars, last pushed 14d ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 216 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 2026-09-12.
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