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 jeffreytse/grimoire-core --skill apply-defensive-driving-principlesgit clone --depth 1 https://github.com/jeffreytse/grimoire-coreWrote 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/jeffreytse/grimoire-core/apply-defensive-driving-principles)<a href="https://agentmods.dev/skills/jeffreytse/grimoire-core/apply-defensive-driving-principles"><img src="https://agentmods.dev/badge/skills/jeffreytse/grimoire-core/apply-defensive-driving-principles/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/jeffreytse/grimoire-core/apply-defensive-driving-principles"><img src="https://agentmods.dev/badge/skills/jeffreytse/grimoire-core/apply-defensive-driving-principles.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 | $0.00030 | $0.00987 |
| Opus 5 | $0.00015 | $0.00494 |
| Sonnet 5 | $0.00006 | $0.00197 |
| Haiku 4.5 | $0.00003 | $0.00099 |
Grade A, and why
apply-defensive-driving-principles 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 10d 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 — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Apply Defensive Driving Principles
Reduce crash risk by anticipating hazards, maintaining space cushions, and making decisions before situations become emergencies.
Why This Is Best Practice
Adopted by: NSF International defensive driving programs, AAA Driver Improvement Programs (1M+ participants/year), Smith System fleet safety (Fortune 500 fleets, UPS, Coca-Cola), NHTSA Driver Education programs
Impact: Defensive driving training reduces crash frequency by 20–50% (AAA Foundation); Smith System-trained fleets report 30–75% reduction in collision frequency; employer-mandated programs lower fleet insurance costs 15–30%
Why best: Over 90% of crashes involve human error; defensive driving addresses perception-reaction gap (average 1.5 seconds) by building proactive scanning and decision-making habits that override reactive instincts
Sources: AAA Foundation for Traffic Safety "Distracted Driving" research (2022); Smith System "5 Keys to Space Cushion Driving"; NHTSA "Driver Education Model Curriculum"
Steps
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Aim high in steering — Focus eyes 12–15 seconds ahead (not just immediately in front of the hood); at 60 mph that is roughly 1,000 feet; this extends reaction time from 1.5 to 4–5 seconds.
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Get the big picture — Scan the full driving environment: mirrors every 5–8 seconds, intersections before entering, pedestrian zones, parked car doors; identify the 2–3 highest-risk elements in the scene.
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Keep eyes moving — Avoid fixating; shift gaze every 2 seconds across near, mid, and far zones; fixation is the leading cause of failure to detect hazards.
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Leave yourself an out — Maintain a following distance of at least 3–4 seconds (add 1 second per adverse condition: rain, night, fatigue, cargo); identify an escape route before it is needed.
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Make sure they see you — Use headlights in low-visibility conditions, position vehicle where it is visible (avoid blind spots), use horn preventively not reactively, make eye contact at intersections.
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.
- 10d ago First seen · 60 lines · 30 tokens per session scan A 0e25e32eeaeb
apply-defensive-driving-principles is a skill published in the GitHub repository jeffreytse/grimoire-core (4 stars, last pushed 22d ago), licensed MIT. It adds 30 tokens to every session and 987 once invoked, about $0.0002 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 2026-08-31.
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