Borrowing it
Nothing to install: this file belongs to lootlog/monorepo. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/lootlog/monorepo/main/.agents/skills/blast-radius/SKILL.mdgit clone --depth 1 https://github.com/lootlog/monorepoWrote 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/lootlog/monorepo/blast-radius)<a href="https://agentmods.dev/skills/lootlog/monorepo/blast-radius"><img src="https://agentmods.dev/badge/skills/lootlog/monorepo/blast-radius/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/lootlog/monorepo/blast-radius"><img src="https://agentmods.dev/badge/skills/lootlog/monorepo/blast-radius.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 | $0.00057 | $0.00338 |
| Opus 5.5 | $0.00023 | $0.00135 |
| Sonnet 5.5 | $0.00011 | $0.00068 |
| Haiku 4.5 | $0.00006 | $0.00034 |
Grade A, and why
blast-radius 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 1mo 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
Blast radius
Find the indirect failure modes before a change ships.
Workflow
- Read the diff, affected symbols, package boundaries, schemas, generated artifacts, and relevant tests.
- If
.codegraph/exists, use CodeGraph before text search to trace callers, callees, and package relationships. - State the one or two facts that make the change safe. Do not hide assumptions inside a long risk list.
- Trace where symbol search stops: OpenAPI contracts, database columns, serialized events, Redis keys, queue payloads, generated clients, environment variables, and consumers in other workspaces.
- Classify each meaningful risk by likelihood, impact, and the cheapest check that would expose it.
- Prove the key safety fact with the narrowest real check available: a focused test, a script against production code, an existing running application, or direct inspection of a generated artifact. Do not start an application in this repository.
- Run adjacent validation in proportion to the risk.
Report
Return:
- what behavior changed;
- the key safety fact and the strongest evidence reached;
- confirmed risks with concrete paths and checks;
- risks investigated and cleared;
- the smallest pre-merge verification still needed.
Mark an assumption as unproven when it cannot be checked cheaply. A plausible explanation is not proof.
What ships with it
1 file 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.
- 1mo ago First seen · 31 lines · 57 tokens per session scan A 8a6c757a181e
blast-radius is a skill published in the GitHub repository lootlog/monorepo (29 stars, last pushed yesterday), licensed MIT. It adds 57 tokens to every session and 338 once invoked, about $0.0002 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 2026-08-31.
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review-system-design
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