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 rules/cpuguy96/stepcovnet/design-doc-fieldsgit clone --depth 1 https://github.com/cpuguy96/StepCOVNetWrote 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/rules/cpuguy96/stepcovnet/design-doc-fields)<a href="https://agentmods.dev/rules/cpuguy96/stepcovnet/design-doc-fields"><img src="https://agentmods.dev/badge/rules/cpuguy96/stepcovnet/design-doc-fields.svg" alt="Measured on agentmods" 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 | $0.00000 | $0.00206 |
| Opus 5 | $0.00000 | $0.00103 |
| Sonnet 5 | $0.00000 | $0.00041 |
| Haiku 4.5 | $0.00000 | $0.00021 |
Grade A, and why
design-doc-fields 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 3d 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
Design doc fields
When creating or updating plan / design docs under docs/ that define dataclasses, JSON artifacts, manifests, or config surfaces:
schema_versionon every JSON artifact + version changelog (what v1 is, what triggers v2+).- Field rationale table per object: Field | Meaning | Decision (§/ID) | Why / notes.
- Deferred fields listed explicitly with link to open-items section.
- Cross-links between resolved-decisions §, field tables, and integration docs.
Also document when decided: CLI flag defaults, enum/status meanings, validation gates (pack vs chart vs warning).
Reference shape: DATASET_PREP_PIPELINE.md §6.3.
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.
- 3d ago First seen · 19 lines · 0 tokens per session scan A d8def55c1a07
design-doc-fields is a cursor rule published in the GitHub repository cpuguy96/StepCOVNet (21 stars, last pushed 9d ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 206 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 2026-08-30.
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