/risk

description: Rank a live change for review using a repo-relative percentile and an auditable supporting diff-shape score.
allowed-tools: Bash(repowise risk:*), Read
disable-model-invocation: true

Repowise Risk

Rank a *change* (not a file) by size and spread. `risk_percentile` is its rank among the repo's recent commits by diff size: not a bug predictor. The response includes `fix_history`: the recency-weighted bug-fix record of the files the change touches, manifests and lockfiles excluded. The supporting 0–10 score measures diff size and spread (named in `score_measures`) rather than danger and is not a probability. Pure git + learned constants: no LLM, no network. A natural pre-merge / PR gate.

Steps

1. If `.repowise/` doesn't exist: "This repo isn't indexed yet. Run `/repowise:init` first." Stop. 2. Resolve the target from `$ARGUMENTS`, run `repowise risk`, and present the size-and-spread percentile, then the fix history (which files carry prior bug fixes), then the score and its drivers.

Choosing the revspec

• No args → `repowise risk` (scores uncommitted work, or `HEAD` when the tree is clean)
• A commit SHA → `repowise risk <sha>`
• A range / PR / branch → `repowise risk <base>..<head>` (e.g. `repowise risk main..HEAD`)

Useful flags:

• `--ext .py,.ts` — only count changes in those file types
• `-x, --exclude <pattern>` — gitignore-style pattern to drop from the diff (repeatable; also honors a `.riskignore` file)
• `--format json` — machine-readable fix history + score + features + drivers
• `--baseline <n>` — how many recent commits to rank the change against (0 disables)
• `-t, --target <path>` — score what history says about named files instead of a change (repeatable; reads the index)
• `--path <dir>` — point at a different git repo

How this differs from the other risk views

• This command = the **whole change** ranked against recent repository history.
• For **per-file** structural reach, missing co-changes, and missing tests,

use `repowise risk --target <path> --changed-file <path>` / the `change-review` skill.

• For **per-file health** scores, use `/repowise:health`.