blast-radius skillA

blast-radius is agent-read markdown (skill) from athola/claude-night-market: Analyzes code change impact with risk scoring and affected-node mapping. Use before merging to understand what a change touches and what lacks test coverage..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified before it reaches your agent: the main file against the SHA-256 recorded here, the others against the git hashes of its source commit. The deterministic audit below grades the latest version, and the same checks always give the same file the same grade.

What the file says

# Blast Radius Analysis

Analyze the impact of current code changes using the
code knowledge graph.

## When NOT To Use

- Reading the changed code for defects (use `pensive:bug-review`)
- The code graph is missing or stale (use `gauntlet:graph-build`)

## Prerequisites

This skill requires the **gauntlet** plugin for graph
data. Check if it's available:

```bash
GRAPH_QUERY=$(find ~/.claude/plugins -name "graph_query.py" -path "*/gauntlet/*" 2>/dev/null | head -1)
```

**If gauntlet is not installed** (GRAPH_QUERY is empty):
Fall back to a manual impact analysis using `git diff`
and `grep` to trace imports and call sites. Skip graph
steps and go directly to step 3 (manual mode).

**If gauntlet is installed but no graph.db exists**:
Tell the user: "Run `/gauntlet-graph build` first."

## Steps

1. **Show current changes**: Run `git diff --stat` to
   show the user what files changed.

2. **Run impact analysis** (requires gauntlet):
   ```bash
   python3 "$GRAPH_QUERY" \
       --action impact --base-ref HEAD --depth 2
   ```

   **Fallback tier 1 (sem available, no gauntlet)**:
   Use sem for cross-file dependency tracing:
   ```bash
   if command -v sem &>/dev/null; then
…

Read the whole file at its exact version.

How to install

mdr add athola/claude-night-market/blast-radius@git:20260902.10cb166

mdr add athola/claude-night-market/blast-radius@sha256:660572dc054c2694

[![mdr](https://markdownregistry.com/badge/art_2gyv4zqdc2kqi4ni.svg)](https://markdownregistry.com/a/art_2gyv4zqdc2kqi4ni)

Versions

Audit of the latest version

Source

API

GET https://markdownregistry.com/api/v1/artifacts/art_2gyv4zqdc2kqi4ni
GET https://markdownregistry.com/api/v1/resolve?ref=athola/claude-night-market/blast-radius
GET https://markdownregistry.com/api/v1/blob/660572dc054c269434fc7fb38f698dcd574be9d145edc81993c3a6c150b8444d

Your agent does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

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