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/igorkasyanchuk/active_storage_validations/gitgit clone --depth 1 https://github.com/igorkasyanchuk/active_storage_validationsWhat 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 | $0.01341 | $0.01341 |
| Opus 5 | $0.00671 | $0.00671 |
| Sonnet 5 | $0.00268 | $0.00268 |
| Haiku 4.5 | $0.00134 | $0.00134 |
Grade A, and why
git 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 yesterday.
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 — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Git — Commit Messages
When creating a commit, follow this rule — not ad-hoc styles from git log history.
Commit workflow
When the user asks to commit (or commit and push):
- Message format — use this file only. Do not run
git logor infer style from existing commits (many are merge commits or legacy types). - Inspect changes — in parallel:
git status,git diff(andgit diff --stagedif needed). - Draft — write subject (+ optional body) per the rules below; validate against Validations.
- Commit — stage relevant files, commit via HEREDOC, then
git statusto confirm. - Push — only when explicitly requested.
Format: Conventional Commits
<type>(<scope>): <brief description>
| Part | Rule |
|---|---|
<type> |
Required. One of: feat, fix, docs, style, refactor, test, chore, perf, build, ci |
<scope> |
Optional. Area affected — see Scope glossary |
<description> |
Required. Imperative mood, lowercase start, ≤ 72 characters, no trailing punctuation |
Subject line rules
- Imperative mood — write as a command:
add,fix,remove,update— notadded,fixes,removing - Length — keep the subject ≤ 72 characters (Git and GitHub truncate longer lines)
- No trailing punctuation — no period, exclamation mark, etc.
Examples
feat(matchers): add #except_on option for Rails :except_on
fix(content_type): reject spoofed mime types without file magic
refactor(attachable): drop obsolete download_chunk Rails version check
test(validators): cover size equal_to boundary
docs(readme): document form_builder accept inference
chore(deps): bump marcel to 1.0
ci(gemfiles): pin sqlite3 >= 2.9 for Ruby 4.0
Validations
Before committing, verify the subject line:
- Pattern —
^(feat|fix|docs|style|refactor|test|chore|perf|build|ci)(\(.+\))?: .+$ - Imperative, ≤ 72 chars, no trailing punctuation
- Optional body — blank line, then paragraphs with more context
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.
- yesterday First seen · 126 lines · 1,341 tokens per session scan A f23c15be585c
git is a cursor rule published in the GitHub repository igorkasyanchuk/active_storage_validations (1,191 stars, last pushed 9d ago), licensed MIT. It adds 1,341 tokens to every session, about $0.0067 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 2026-08-30.
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