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Creates and configures Claude Code slash commands with YAML frontmatter, argument handling, and tool permissions. Use when building new commands, adding $ARGUMENTS or $1-$N parameters, configuring allowed-tools, organizing command namespaces, or fixing command failures.

Install Skill

1Download skill
2Enable skills in Claude

Open claude.ai/settings/capabilities and find the "Skills" section

3Upload to Claude

Click "Upload skill" and select the downloaded ZIP file

Note: Please verify skill by going through its instructions before using it.

SKILL.md

name command-builder
type standard
depth base
description Creates and configures Claude Code slash commands with YAML frontmatter, argument handling, and tool permissions. Use when building new commands, adding $ARGUMENTS or $1-$N parameters, configuring allowed-tools, organizing command namespaces, or fixing command failures.

[H1][COMMAND-BUILDER]

Dictum: Reusable prompt templates reduce repetition and enforce consistency.


Load commands from .claude/commands/ (project) or ~/.claude/commands/ (user). Filename becomes command name.

Tasks:

  1. Read index.md — Reference file listing for navigation
  2. Read workflow.md — 5-phase creation process
  3. Read variables.md — Argument capture, file references, skill loading
  4. Read hints.md — Argument-hint syntax, enum patterns
  5. (prose) Load style-standards skill — Voice, formatting, constraints
  6. Execute per workflow — UNDERSTAND, ACQUIRE, RESEARCH, AUTHOR, VALIDATE
  7. Validate — Quality gate; see §VALIDATION

[REFERENCE]: index.md — Complete reference file listing


[1][FRONTMATTER]

Dictum: Declarative constraints gate command execution.


---
description: Brief description shown in /help menu
argument-hint: [required-arg] [optional-arg?]
allowed-tools: Read, Write, Edit, Glob, Grep, Task, Bash, TodoWrite
model: opus
---
[INDEX] [FIELD] [TYPE] [PURPOSE] [SYNTAX]
[1] description string /help menu text Verb-first. <80 chars. Outcome-focused.
[2] argument-hint string Autocomplete guidance [required] [optional?] [--flag].
[3] allowed-tools list Scoped tool permissions Comma-separated tool names.
[4] model string Override default model Full model ID or alias.

[IMPORTANT]:

  • [ALWAYS] Use --- delimiters (three dashes, no spaces).
  • [ALWAYS] Quote strings containing :, #, [, ], {, }.
  • [NEVER] Use tabs; YAML requires spaces.

[CRITICAL]:

  • [ALWAYS] Declare Read for every @path reference.
  • [ALWAYS] Declare Bash for every !command reference.
  • [NEVER] Omit required tools—command fails without output.

[2][MODELS]

Dictum: Model selection balances capability against cost and latency.


[CRITICAL] Session inherits default model. Override for specific capability requirements.

[INDEX] [MODEL_ID] [ALIAS] [STRENGTH] [LATENCY] [COST]
[1] claude-opus-4-5-20251101 opus Complex reasoning High High
[2] claude-sonnet-4-5-20250929 sonnet Balanced performance Medium Medium
[3] claude-3-5-haiku-20241022 haiku Fast, simple tasks Low Low
[INDEX] [CHARACTERISTIC] [OPUS] [SONNET] [HAIKU]
[1] Multi-file scope X
[2] Architectural impact X
[3] Standard development X
[4] Speed priority X
[5] Deep analysis X X

[3][VARIABLES]

Dictum: Dynamic substitution enables reusable commands.


[INDEX] [SYNTAX] [CAPTURES] [REQUIRED_TOOL] [USE_WHEN]
[1] $ARGUMENTS All args as string None Free-form input
[2] $1, $2... Positional parameters None Structured multi-arg
[3] ${1:-val} Default if missing None Optional parameters
[4] @path Include file contents Read File analysis
[5] !command Shell execution Bash Dynamic context

[CRITICAL]:

  • [NEVER] Mix $ARGUMENTS and $1-$N in same command.
  • [ALWAYS] Declare required tools for @path and !command.

→references/variables.md: Complete reference—examples, skill loading, anti-patterns.


[4][PATTERNS]

Dictum: Canonical patterns accelerate development.


[4.1][FILE_ANALYSIS]

---
description: Analyze file for issues
argument-hint: [file-path]
allowed-tools: Read
---
## Target
@$1
## Task
Identify security, performance, and code quality issues.

[4.2][MULTI_FILE_OPERATION]

---
description: Process files matching pattern
argument-hint: [glob-pattern]
allowed-tools: Read, Edit, Glob, TodoWrite
---
## Task
Match files via $1. Analyze content. Apply fixes. Track progress via TodoWrite.

[4.3][AGENT_WORKFLOW]

---
description: Multi-agent analysis
argument-hint: [target-folder]
allowed-tools: Task, Read, Glob, TodoWrite
---
## Task
1. Match files in $1 via Glob
2. Spawn analysis agents via Task
3. Synthesize findings, track via TodoWrite

[4.4][SKILL_CONTEXT]

---
description: Validate target against skill standards
argument-hint: [target] [focus?]
allowed-tools: Read, Task, Glob, Edit, TodoWrite
---
## Skill Context
@.claude/skills/[skill-name]/SKILL.md
@.claude/skills/[skill-name]/references/[domain]/*.md
## Task
Load context above. Spawn Task agents. Verify findings against loaded context. Apply corrections.

→templates/command-template.md — canonical template.


[5][ORGANIZATION]

Dictum: Namespaces prevent command collision.


[INDEX] [SCOPE] [LOCATION] [USE_CASE]
[1] Personal ~/.claude/commands/ Individual workflows
[2] Project .claude/commands/ Shared team workflows
[INDEX] [CONVENTION] [PATTERN] [EXAMPLE]
[1] Verb-first action-target create-component
[2] Lowercase No capitals review-pr
[3] Hyphen-separated No underscores run-tests
[4] Descriptive Clear purpose analyze-coverage
.claude/commands/
├── git/
│   ├── commit.md  -> /git:commit
│   └── pr.md      -> /git:pr
└── test/
    └── unit.md    -> /test:unit

[6][VALIDATION]

Dictum: Validation gates prevent incomplete artifacts.


[VERIFY] Completion:

  • Workflow: All 5 phases executed (UNDERSTAND → VALIDATE).
  • Frontmatter: Valid YAML, description present, tools declared.
  • Variables: No $ARGUMENTS + $1-$N mixing.
  • Tools: All @path have Read, all !command have Bash.
  • Quality: LOC < 125, verb-first naming.

[REFERENCE] Operational checklist: →validation.md