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 romiluz13/cc10x --skill diff-driven-docsgit clone --depth 1 https://github.com/romiluz13/cc10xWrote 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/romiluz13/cc10x/diff-driven-docs)<a href="https://agentmods.dev/skills/romiluz13/cc10x/diff-driven-docs"><img src="https://agentmods.dev/badge/skills/romiluz13/cc10x/diff-driven-docs/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/romiluz13/cc10x/diff-driven-docs"><img src="https://agentmods.dev/badge/skills/romiluz13/cc10x/diff-driven-docs.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 | $0.00064 | $0.02475 |
| Opus 5.5 | $0.00026 | $0.00990 |
| Sonnet 5.5 | $0.00013 | $0.00495 |
| Haiku 4.5 | $0.00006 | $0.00248 |
Grade A, and why
diff-driven-docs 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 9d 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 — 183 lines — stays where its author put it; the contents beside it link to each section on GitHub.
diff-driven-docs
Overview
Stale documentation is worse than no documentation — it actively misleads contributors, users, and future maintainers. Run the Impact Classifier on the diff across the four layers (business, technical, audit, glossary); write only what a layer's verdict requires.
Impact Classifier
Run this classifier before any doc work. Use it to determine which layers to evaluate and which to skip.
| Diff Characteristic | Business Layer | Technical Layer | Audit Layer | Glossary Layer |
|---|---|---|---|---|
| Internal utility, helper, or type change only | SKIP | CHECK | SKIP | SKIP |
| Test addition with no new pattern | SKIP | SKIP | SKIP | SKIP |
| Style / formatting change | SKIP | SKIP | SKIP | SKIP |
| Dependency version bump (no API change) | SKIP | SKIP | SKIP | SKIP |
| Routine bug fix (existing behavior corrected) | SKIP | CHECK | SKIP | SKIP |
| Simple refactor (behavior unchanged) | SKIP | CHECK if signatures changed | SKIP | SKIP |
| New exported function / hook / component | SKIP | CHECK | CHECK | SKIP |
| New page or route | CHECK | CHECK | CHECK | CHECK |
| Architectural pattern introduced | SKIP | CHECK | CREATE | CHECK |
| Technology choice made | SKIP | CHECK | CREATE | CHECK |
| Breaking change to public API | CHECK | CHECK | CREATE | CHECK |
| Permission or role change | CHECK | CHECK | CHECK | SKIP |
| Security or compliance impact | CHECK | CHECK | CREATE or UPDATE | SKIP |
| Domain term resolved or sharpened during the workflow | SKIP | SKIP | SKIP | CHECK |
SKIP business docs if: no user-facing surface changed; only internal utils, types, or tests were modified.
ALWAYS check technical docs when hooks, components, migrations, schema, routes, or exported library APIs changed.
CREATE an audit doc if: an architectural decision was made, a new pattern was introduced, a non-obvious tradeoff was accepted, or a team member six months from now would ask "why did we do it this way?"
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago Changed 5cfc8d80299e
- 1mo ago First seen · 183 lines · 64 tokens per session scan A d5fdd59f9ba0
diff-driven-docs is a skill published in the GitHub repository romiluz13/cc10x (164 stars, last pushed 10d ago), licensed MIT. It adds 64 tokens to every session and 2,475 once invoked, about $0.0003 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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