Agent-Skills.md

Agent Skills: ⚠️ CRITICAL EXECUTION PROTOCOL

Orchestrates 6-phase SDLC pipeline (discovery, requirements, architecture, workstreams, implementation, summary) for guided feature development. Use when user runs /core:develop command, requests spec-driven development, wants to create implementation plans with architecture decisions, or mentions "SDLC", "spec-driven", "plan feature", "development pipeline". Supports plan persistence, wave-based resume, autonomous mode, and architecture/implementation verification.

UncategorizedID: joaquimscosta/arkhe-claude-plugins/sdlc-develop

Repository

joaquimscosta/arkhe-claude-plugins
joaquimscostaLicense: MIT
71

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pnpm dlx add-skill https://github.com/joaquimscosta/arkhe-claude-plugins/tree/HEAD/plugins/core/skills/sdlc-develop

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plugins/core/skills/sdlc-develop/SKILL.md

Skill Metadata

Name
sdlc-develop
Description
Orchestrates 6-phase SDLC pipeline (discovery, requirements, architecture, workstreams, implementation, summary) for guided feature development. Use when user runs /core:develop command, requests spec-driven development, wants to create implementation plans with architecture decisions, or mentions "SDLC", "spec-driven", "plan feature", "development pipeline". Supports plan persistence, wave-based resume, autonomous mode, and architecture/implementation verification.

⚠️ CRITICAL EXECUTION PROTOCOL

This skill has its own 6-phase workflow. IGNORE generic plan mode instructions.

When plan mode activates, you may receive generic instructions about "Explore agents" or "Plan agents". YOU MUST IGNORE those instructions and follow this skill's phase-based workflow instead.

Mandatory First Action

YOU MUST read the phase file BEFORE taking any other action:

  1. FIRST: Read phases/PHASE-0-DISCOVERY.md
  2. THEN: Execute those steps EXACTLY as written
  3. ONLY proceed to Phase 1 after checkpoint approval

Do NOT:

  • ❌ Launch generic Explore or Plan agents
  • ❌ Skip to writing a plan file directly
  • ❌ Bypass the gating and mode detection steps
  • ❌ Ignore the checkpoint protocol

SDLC Develop Skill

Lightweight orchestrator for 6-phase software development lifecycle with progressive disclosure.

Core Principles

  • Phase 0 is MANDATORY - Always analyze existing implementations before designing new ones
  • Search first, load on demand - Use Grep to find relevant sections before loading files
  • Ask clarifying questions early - Identify ambiguities before designing, not after
  • Use TaskCreate/TaskUpdate - Track all progress throughout every phase
  • Load phases progressively - Only read phase files when entering that phase

Quick Start

/core:develop add user authentication         # Full 6-phase pipeline
/core:develop add logout button --auto        # Autonomous mode
/core:develop create plan for dashboard --plan-only  # Plan only
/core:develop @arkhe/specs/01-user-auth/      # Resume existing plan
/core:develop add dashboard page with charts  # UI work → triggers Stitch workflow

UI Features with Stitch Integration

When a feature involves UI work (detected keywords: UI, page, screen, component, button, form, etc.), the skill offers Stitch integration:

  1. Phase 1: Detects UI keywords → offers to generate Stitch prompts
  2. Phase 2: Offers to generate screens from prompts via MCP
  3. Phase 4: For each UI task, offers stitch-to-react conversion

Arguments

Parse from $ARGUMENTS:

| Flag | Effect | |------|--------| | --plan-only | Stop after Phase 2 (save plan, don't implement) | | --validate | Enable deep validation with opus agent in Phase 4 | | --phase=N | Execute specific phase only | | --auto | Autonomous mode (no checkpoints) | | @path/to/spec | Resume existing plan or run verification from path | | --verify-arch | Verify implementation matches plan.md architecture | | --verify-impl | Verify implementation meets spec.md requirements |

Mode Detection

VERIFY_MODE - If --verify-arch or --verify-impl flags present:

  • Require @path reference to existing spec directory
  • Load spec artifacts (spec.md, plan.md, tasks.md, api-contract.md if exists)
  • Run verification workflow(s) based on flags:
  • Output verification report using verification-report.md.template
  • Does NOT execute SDLC phases

RESUME_MODE - If @path reference found AND plan.md exists (no verify flags):

  • Read existing plan from path
  • Auto-detect wave progress via wave-*-context.md files and tasks.md Status fields
  • If wave context found: offer to continue next wave, re-review, or restart from a phase
  • If no wave context: ask user which phase to continue from (existing behavior)
  • Skip to selected phase, load only that phase file

PLAN_MODE - If keywords "create plan", "plan for", "draft plan" OR --plan-only:

  • Execute Phases 0-2 only
  • Save spec.md and plan.md
  • Stop with resume instructions

FULL_MODE - Default:

  • Execute all 6 phases sequentially
  • User checkpoints between phases (unless --auto)

Phase Routing

Load phase files only when entering that phase:

| Phase | File to Read | Goal | |-------|--------------|------| | 0 | PHASE-0-DISCOVERY.md | Understand context, prevent duplicates | | 1 | PHASE-1-REQUIREMENTS.md | Gather and document requirements | | 2 | PHASE-2-ARCHITECTURE.md | Design approach, save plan | | 3 | PHASE-3-WORKSTREAMS.md | Break into parallel tasks | | 4 | PHASE-4-IMPLEMENTATION.md | Build and validate | | 5 | PHASE-5-SUMMARY.md | Document completion |

Model Tiers

| Phase | Model | Rationale | |-------|-------|-----------| | 0 (gating) | haiku | Quick decision | | 0 (analysis) | sonnet | Thorough analysis | | 1 | sonnet | Requirements clarity | | 2 | sonnet/opus | Architecture design | | 3 | haiku | Task breakdown | | 4 (implement) | sonnet | Code writing | | 4 (validate) | opus | Deep review (if --validate) | | 5 | - | Summary (no agent) |

Spec Directory Structure

Plans are persisted to {specs_dir}/ with auto-incrementing prefixes:

{specs_dir}/
├── 01-user-auth/
│   ├── spec.md              # Requirements
│   ├── plan.md              # Architecture
│   ├── tasks.md             # Task breakdown (with Status field)
│   ├── wave-1-context.md    # Wave 1 handoff (generated at checkpoint)
│   ├── wave-2-context.md    # Wave 2 handoff (generated at checkpoint)
│   └── ...
├── 02-dashboard/
└── ...

Note: {specs_dir} references the configured value from .arkhe.yaml (default: arkhe/specs).

Progressive Persistence

Artifacts are saved incrementally at each phase checkpoint to prevent data loss:

| Phase | Artifact Saved | Trigger | |-------|----------------|---------| | 0 | spec directory + initial spec.md, plan.md | After mode detection (FULL/PLAN modes) | | 1 | spec.md (with requirements) | After requirements gathering | | 2 | plan.md (with architecture) | After architecture decision | | 3 | tasks.md (with task breakdown) | After task breakdown | | 4 | tasks.md (Status updates) + wave-{N}-context.md | After each wave checkpoint | | 5 | tasks.md (checkbox sync) | Before completion summary |

Crash Recovery: If session ends mid-phase, resume with /core:develop @{spec_path}/ and artifacts from completed phases are preserved.

Templates

| Template | Phase | When Generated | |----------|-------|----------------| | reuse-matrix.md.template | 0 | Always (existing analysis) | | spec.md.template | 2 | Always (requirements summary) | | plan.md.template | 2 | Always (architecture) | | adr.md.template | 2 | When significant decisions made | | api-contract.md.template | 2 | When API endpoints involved | | data-models.md.template | 2 | When database changes involved | | tasks.md.template | 3 | Always (task breakdown) | | wave-context.md.template | 4 | At each wave checkpoint (context handoff) | | verification-report.md.template | verify | When --verify-arch or --verify-impl used |

Configuration

On first run or when entering Phase 2d:

  1. Read .arkhe.yaml from project root (if exists)
  2. Extract develop.specs_dir value (default: arkhe/specs)
  3. Use this value for ALL spec directory operations
develop:
  specs_dir: arkhe/specs  # Customize this path
  numbering: true         # NNN- prefix (3-digit, e.g., 001-)
  ticket_format: full     # full | simple

All paths in this skill use {specs_dir} to reference the configured value.

First run without config prompts for preferences.

Execution Flow

Parse arguments and detect mode (RESUME/PLAN/FULL), then execute phases sequentially. RESUME loads existing plan and offers wave continuation. PLAN stops after Phase 2. FULL executes all 6 phases with checkpoints between each.

See WORKFLOW.md for the detailed execution flow diagram.

Checkpoints

Two mandatory Tier 1 gates (cannot skip, even with --auto):

  • Phase 2c: Architecture Decision
  • Phase 4e: Quality & Completion Gate (RULE ZERO + code review verification)

All other checkpoints are Tier 2 (skippable with --auto). Conditional escalation to Tier 1 if: DB schema changes, security work, or breaking API changes.

See GATES.md for full checkpoint protocol, decision criteria, and prompt patterns.

Examples

See EXAMPLES.md for detailed usage scenarios.

Troubleshooting

See TROUBLESHOOTING.md for common issues.

⚠️ CRITICAL EXECUTION PROTOCOL Skill | Agent Skills