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 plainlang/plain-forge --skill add-test-requirementgit clone --depth 1 https://github.com/plainlang/plain-forgeWrote 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/plainlang/plain-forge/add-test-requirement)<a href="https://agentmods.dev/skills/plainlang/plain-forge/add-test-requirement"><img src="https://agentmods.dev/badge/skills/plainlang/plain-forge/add-test-requirement/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/plainlang/plain-forge/add-test-requirement"><img src="https://agentmods.dev/badge/skills/plainlang/plain-forge/add-test-requirement.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00052 | $0.00721 |
| Opus 5.5 | $0.00021 | $0.00288 |
| Sonnet 5.5 | $0.00010 | $0.00144 |
| Haiku 4.5 | $0.00005 | $0.00072 |
Grade A, and why
add-test-requirement 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.
How it starts
The opening of the file, as written. The whole thing — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Add Test Requirement
Always use the skill load-plain-reference to retrieve the ***plain syntax rules — but only if you haven't done so yet.
Workflow
- Identify the target
.plainfile. If ambiguous, ask the user. - Read the file to understand existing test reqs and the overall spec structure.
- Confirm this is a conformance test concern — unit test guidance goes in
***implementation reqs***, not here. - Draft the requirement following the rules below.
- Insert it into the
***test reqs***section. - Read the file again to confirm correct placement and syntax.
What Belongs Here
Test reqs specify how conformance tests should be written and run. Common contents:
- Test framework: which framework to use (e.g., pytest, Unittest, xUnit)
- Execution method: the command to run the tests
- Testing constraints: what must or must not be done in tests (e.g., no skipping tests, mock requirements)
- Test data: how test fixtures or mock data should be structured
- Environment setup: any prerequisites for running conformance tests
What Does NOT Belong Here
- Unit test guidance — that goes in
***implementation reqs*** - Acceptance tests — those are nested under individual functional specs in
***functional specs*** - Behavioral requirements — those go in
***functional specs*** - Technology choices for the implementation — those go in
***implementation reqs***
Conformance Tests vs Other Tests
| Test Type | Where to Specify | Purpose |
|---|---|---|
| Unit tests | ***implementation reqs*** |
Test individual functionalities in isolation |
| Conformance tests | ***test reqs*** |
Verify implementation conforms to the full spec |
| Acceptance tests | ***acceptance tests*** under a functional spec |
Verify a specific functional spec |
Format
Test reqs are bullet points in the ***test reqs*** section:
***test reqs***
- :ConformanceTests: should be implemented using pytest framework.
- :ConformanceTests: will be run using "pytest" command.
- :ConformanceTests: must be implemented and executed - do not skip tests.
- :ConformanceTests: should mock all external HTTP calls.
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 · 75 lines · 52 tokens per session scan A 75c6af5289ab
add-test-requirement is a skill published in the GitHub repository plainlang/plain-forge (79 stars, last pushed yesterday), licensed MIT. It adds 52 tokens to every session and 721 once invoked, about $0.0002 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.
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