command-builder

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.

$ Instalar

git clone https://github.com/bsamiee/Parametric_Portal /tmp/Parametric_Portal && cp -r /tmp/Parametric_Portal/.claude/skills/command-builder ~/.claude/skills/Parametric_Portal

// tip: Run this command in your terminal to install the skill


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]descriptionstring/help menu textVerb-first. <80 chars. Outcome-focused.
[2]argument-hintstringAutocomplete guidance[required] [optional?] [--flag].
[3]allowed-toolslistScoped tool permissionsComma-separated tool names.
[4]modelstringOverride default modelFull 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-4-5-20251101opusComplex reasoningHighHigh
[2]claude-sonnet-4-5-20250929sonnetBalanced performanceMediumMedium
[3]claude-3-5-haiku-20241022haikuFast, simple tasksLowLow
[INDEX][CHARACTERISTIC][OPUS][SONNET][HAIKU]
[1]Multi-file scopeX
[2]Architectural impactX
[3]Standard developmentX
[4]Speed priorityX
[5]Deep analysisXX

[3][VARIABLES]

Dictum: Dynamic substitution enables reusable commands.

[INDEX][SYNTAX][CAPTURES][REQUIRED_TOOL][USE_WHEN]
[1]$ARGUMENTSAll args as stringNoneFree-form input
[2]$1, $2...Positional parametersNoneStructured multi-arg
[3]${1:-val}Default if missingNoneOptional parameters
[4]@pathInclude file contentsReadFile analysis
[5]!commandShell executionBashDynamic 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-firstaction-targetcreate-component
[2]LowercaseNo capitalsreview-pr
[3]Hyphen-separatedNo underscoresrun-tests
[4]DescriptiveClear purposeanalyze-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