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 blockmatic/basilic --skill light-review-existing-diffsgit clone --depth 1 https://github.com/blockmatic/basilicWrote 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/blockmatic/basilic/light-review-existing-diffs)<a href="https://agentmods.dev/skills/blockmatic/basilic/light-review-existing-diffs"><img src="https://agentmods.dev/badge/skills/blockmatic/basilic/light-review-existing-diffs.svg" alt="Measured on agentmods" 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 | $0.00043 | $0.00223 |
| Opus 5 | $0.00022 | $0.00112 |
| Sonnet 5 | $0.00009 | $0.00045 |
| Haiku 4.5 | $0.00004 | $0.00022 |
Grade A, and why
light-review-existing-diffs 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 2d 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
Purpose
Perform quick quality pass on current diffs to surface risky areas, ensure polish, and flag follow-up actions for deeper review.
Steps
- Scan recent changes: List open branches or pending commits requiring review, skim side-by-side diffs focusing on new/modified files, note files/modules with large/complex edits
- Assess quality signals: Watch for TODOs/debug code/commented blocks needing cleanup, verify naming/formatting/imports follow project standards, check that tests/documentation were updated when behavior changed
- Flag next actions: Mark sections warranting full review, capture questions for the author, and list quick fixes. Apply edits only if the user asked for them.
Completion
Read completion evidence before reporting completion.
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.
- 2d ago Changed · +7 lines 883d388cc225
- 4d ago First seen · 13 lines · 43 tokens per session scan A 9880be3f1cdc
light-review-existing-diffs is a skill published in the GitHub repository blockmatic/basilic (89 stars, last pushed yesterday), licensed MIT. It adds 43 tokens to every session and 223 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 2026-09-03.
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