/configure:justfile
Check and configure project Justfile against project standards.
When to Use This Skill
| Use this skill when... | Use another approach when... |
|---|---|
| Setting up a new Justfile for a project | Project already uses Make exclusively and migration is not desired — use /configure:makefile |
| Auditing existing Justfile for missing standard recipes | Writing complex custom recipes — use justfile-expert skill |
| Migrating from Makefile to Justfile | Project has no task runner needs (single-file scripts) |
| Ensuring Justfile follows team conventions (groups, comments, settings) | Debugging a specific recipe failure — use direct just commands |
| Running CI/CD compliance checks on project task runners | Only need to list available recipes — run just --list directly |
Context
- Project root: !
pwd - Justfile: !
find . -maxdepth 1 \( -name 'justfile' -o -name 'Justfile' \) - Makefile: !
find . -maxdepth 1 -name 'Makefile' - Package files: !
find . -maxdepth 1 \( -name 'package.json' -o -name 'pyproject.toml' -o -name 'Cargo.toml' -o -name 'go.mod' \) - Docker files: !
find . -maxdepth 1 \( -name 'Dockerfile' -o -name 'docker-compose.yml' \) - Env file: !
find . -maxdepth 1 -name '.env' - Project standards: !
find . -maxdepth 1 -name '.project-standards.yaml'
Parameters
Parse from command arguments:
--check-only: Report compliance status without modifications (CI/CD mode)--fix: Apply fixes automatically without prompting
Execution
Execute this Justfile compliance check:
Step 1: Detect Justfile and project type
- Check for
justfileorJustfilein project root - If exists, read and analyze current recipes and settings
- Detect project type from file indicators:
| Indicator | Project Type |
|---|---|
pyproject.toml or requirements.txt |
Python |
package.json |
Node.js |
Cargo.toml |
Rust |
go.mod |
Go |
| None of the above | Generic |
Step 2: Analyze required and optional recipes
Check for required recipes:
| Recipe | Purpose | Severity |
|---|---|---|
default |
Alias to help (first recipe) | FAIL if missing |
help |
Display available recipes | FAIL if missing |
test |
Run test suite | FAIL if missing |
lint |
Run linters | FAIL if missing |
build |
Build project artifacts | WARN if missing |
clean |
Remove temporary files | WARN if missing |
Check for context-dependent recipes:
| Recipe | When Required | Severity |
|---|---|---|
format |
If project uses auto-formatters | WARN |
start |
If project has runnable service | INFO |
stop |
If project has background service | INFO |
dev |
If project supports watch mode | INFO |
Step 3: Check compliance settings
Validate Justfile settings:
| Check | Standard | Severity |
|---|---|---|
| File exists | justfile present | FAIL if missing |
| Default recipe | First recipe is default |
WARN if missing |
| Dotenv loading | set dotenv-load present |
INFO |
| Help recipe | Lists all recipes | FAIL if missing |
| Language-specific | Commands match project type | FAIL if mismatched |
| Recipe descriptions | What just --list actually renders is usable |
WARN if any are fragments |
Check what --list RENDERS, not whether a comment exists. just shows one
line per recipe, and with no [doc("...")] attribute that line is the last
line of the comment block above the recipe. A block that ends in an example
or a wrapped clause — the normal way to write one — therefore lists as a
fragment, while the recipe looks fully documented in the file.
Prefer the deterministic check over eyeballing it. It reports only recipes whose rendered line is a fragment, so a justfile using one-line comments correctly comes back clean:
python3 "$TOOLS_PLUGIN/scripts/just-recipe-help.py" --audit
That script ships with a different plugin — tools-plugin, whose
justfile-expert skill documents the --list contract behind it — so there is
no path from here that is guaranteed to resolve. Locate it with
find ~/.claude/plugins -name just-recipe-help.py, or fall back to the manual
check: for each recipe whose comment block is more than one line, read its
last line alone and add a [doc("one line")] wherever that line is an
example, an indented sub-item, or a clause continuing the line above.
Step 4: Generate compliance report
Print a formatted compliance report:
Justfile Compliance Report
==============================
Project Type: python (detected)
Justfile: Found
Recipe Status:
default ✅ PASS
help ✅ PASS (just --list)
test ✅ PASS (uv run pytest)
lint ✅ PASS (uv run ruff check)
build ✅ PASS (docker build)
clean ✅ PASS
format ✅ PASS (uv run ruff format)
start ⚠️ INFO (not applicable)
stop ⚠️ INFO (not applicable)
dev ✅ PASS (uv run uvicorn --reload)
Settings Status:
dotenv-load ✅ PASS
positional-arguments ℹ️ INFO (not set)
Descriptions (what `just --list` renders):
4 recipes list a fragment rather than a description
caption-audit last line continues a sentence from the line above
comfy-matrix last line is a command example
Missing Recipes: none
Issues: 0 found
If --check-only, stop here.
Step 5: Create or update Justfile (if --fix or user confirms)
If --fix flag or user confirms:
- Missing Justfile: Create from standard template based on project type
- Missing recipes: Add recipes with appropriate commands
- Missing settings: Add
set dotenv-loadif.envexists - Missing help: Add help recipe with
just --list
Use language-specific commands from the template section in REFERENCE.md.
Step 6: Update standards tracking
Update .project-standards.yaml:
components:
justfile: "2025.1"
Agentic Optimizations
| Context | Command |
|---|---|
| Quick compliance check | /configure:justfile --check-only |
| Auto-fix all issues | /configure:justfile --fix |
| List existing recipes | just --list |
| Verify specific recipe exists | just --summary |
| Check Justfile syntax | just --evaluate 2>&1 |
Audit what --list renders |
just-recipe-help.py --audit (ships with tools-plugin) |
| Read one recipe's notes + flags | just-recipe-help.py <recipe> |
Flags
| Flag | Description |
|---|---|
--check-only |
Report status without offering fixes |
--fix |
Apply fixes automatically |
Examples
# Check current Justfile compliance
/configure:justfile --check-only
# Create/update Justfile for Python project
/configure:justfile --fix
# Check compliance and prompt for fixes
/configure:justfile
See Also
/configure:makefile- Makefile configuration (legacy)/configure:all- Run all compliance checks/configure:workflows- GitHub Actions workflows/configure:dockerfile- Docker configurationjustfile-expertskill - Comprehensive Just expertise
For the full Justfile template, language-specific recipe bodies, project-type detection logic, and Makefile migration guidance, see REFERENCE.md.