Shell Review

---
name: shell-review
description: "Audits shell scripts for correctness, portability, and common pitfalls. Use when reviewing shell scripts or before committing shell changes."
allowed-tools: "[]"
category: general-purpose
source_repo: athola/claude-night-market
source_path: "plugins/pensive/skills/shell-review/SKILL.md"
source_url: https://github.com/athola/claude-night-market/blob/HEAD/plugins/pensive/skills/shell-review/SKILL.md
---

## Table of Contents

- [Quick Start](#quick-start)
- [When to Use](#when-to-use)
- [Required TodoWrite Items](#required-todowrite-items)
- [Workflow](#workflow)
- [Output Format](#output-format)

# Shell Script Review

Audit shell scripts for correctness, safety, and portability.

## Verification

After review, run `shellcheck <script>` to verify fixes address identified issues.

## Testing

Run `pytest plugins/pensive/tests/skills/test_shell_review.py -v` to validate review patterns.

## Quick Start

```bash
/shell-review path/to/script.sh
```

## When To Use

- CI/CD pipeline scripts
- Git hook scripts
- Wrapper scripts (run-*.sh)
- Build automation scripts
- Pre-commit hook implementations

## When NOT To Use

- Non-shell scripts (Python, JS, etc.)
- One-liner commands that don't need review

## Required TodoWrite Items

1. `shell-review:context-mapped`
2. `shell-review:exit-codes-checked`
3. `shell-review:portability-checked`
4. `shell-review:safety-patterns-verified`
5. `shell-review:structure-checked`
6. `shell-review:evidence-logged`
7. `shell-review:findings-verified`

## Workflow

### Step 1: Map Context (`shell-review:context-mapped`)

Identify shell scripts:
```bash
# Find shell scripts
find . -not -path "*/.venv/*" -not -path "*/__pycache__/*" \
  -not -path "*/node_modules/*" -not -path "*/.git/*" \
  -name "*.sh" -type f | head -20
# Check shebangs
rg -l "^#!/" scripts/ hooks/ 2>/dev/null | head -10
# fallback: grep -l "^#!/" scripts/ hooks/ 2>/dev/null | head -10
```

Document:
- Script purpose and trigger context
- Integration points (make, pre-commit, CI)
- Expected inputs and outputs

### Step 2: Exit Code Audit (`shell-review:exit-codes-checked`)

@include modules/exit-codes.md

### Step 3: Portability Check (`shell-review:portability-checked`)

@include modules/portability.md

### Step 4: Safety Patterns (`shell-review:safety-patterns-verified`)

@include modules/safety-patterns.md

### Step 5: Structure Patterns (`shell-review:structure-checked`)

@include modules/structure-patterns.md

### Step 6: Evidence Log (`shell-review:evidence-logged`)

Use `imbue:proof-of-work` to record findings with file:line references.

Summarize:
- Critical issues (failures masked, security risks)
- Major issues (portability, maintainability)
- Minor issues (style, documentation)

## Output Format

```markdown
## Summary
Shell script review findings

## Scripts Reviewed
- [list with line counts]

## Exit Code Issues
### [E1] Pipeline masks failure
- Location: script.sh:42
- Anchor: `verbatim source text at file:line`
- Pattern: `cmd | grep` loses exit code
- Fix: Use pipefail or capture separately

## Portability Issues
[cross-platform concerns]

## Safety Issues
[unquoted variables, missing set flags]

## Recommendation
Approve / Approve with actions / Block
```

## Verify Findings Are Grounded (`shell-review:findings-verified`)

Every finding must cite a real location and a verbatim anchor. Write
findings to `.review/findings.json` and confirm each citation resolves:

```bash
python plugins/imbue/scripts/citation_verifier.py \
  --findings .review/findings.json --repo-root .
```

Drop or label `UNVERIFIED` any finding the verifier fails (exit `1`); only
verified findings enter the report. See `Skill(imbue:review-core)` Step 5
and `Skill(imbue:structured-output)` for the schema.

## Exit Criteria

- [ ] Exit code propagation verified (pipelines checked for pipefail or
  capture-and-check)
- [ ] Portability issues documented (Bash-isms in `#!/bin/sh` scripts flagged)
- [ ] Safety patterns verified (no echo, braced vars, `:?` expansion, cd in
  subshells, no basename/dirname)
- [ ] Structure patterns verified (library/executable distinction, main call,
  preamble, depcheck, shfmt formatting)
- [ ] Evidence logged with file:line references via `imbue:proof-of-work`
- [ ] Every reported finding carries a `Location` + verbatim `Anchor`
  confirmed by `citation_verifier.py` (exit `0`), or unverified findings
  were dropped or labeled `UNVERIFIED`

---

**Source:** [`athola/claude-night-market`](https://github.com/athola/claude-night-market) → `plugins/pensive/skills/shell-review/SKILL.md`