Development workflows for Codex that keep technical rigor and edge-case handling from becoming product overengineering.
Skill Codex
Root-cause discipline, proportionate impact analysis, and implementation completeness assurance. Use when fixing bugs, reviewing code quality, refactoring, making technical decisions, or performing quality assurance.
Skill Codex
Repository-aware implementation rules for minimal design surface, contract safety, representative patterns, and verifiable changes. Use when implementing, refactoring, or reviewing code.
Skill Codex
Determines which PRD, ADR, UI Spec, Design Doc, and Work Plan a change requires and where each document lives. Use when deciding documentation scope or creating or reviewing one of these artifacts.
Skill Codex
Resolves and records one external evidence source required by a current design or verification decision. Use when repository and supplied evidence cannot determine that decision.
Skill Codex
Selects the smallest sufficient implementation strategy and verification boundary from current requirements and repository evidence.
Skill Codex
Selects and specifies the integration/E2E tests that own accepted behavior at the boundary where it is observable.
Skill Codex
Clarifies inputs, outputs, success criteria, decisions, and unresolved conditions so downstream agents can execute without guessing. Use when writing or revising LLM-facing prompts, handoffs, planning artifacts, reviews, reports, or generated instructions.
Skill Claude CodeCodex
Add integration/E2E tests to existing codebase using Design Docs.
Skill Claude CodeCodex
Execute an approved backend Work Plan autonomously through task execution, quality fixes, commits, and final verification.
Skill Claude CodeCodex
Execute from codebase-scoped analysis to design document creation.
Skill Claude CodeCodex
Investigate problem, verify findings, and derive solutions through structured diagnosis.
Skill Claude CodeCodex
Adjust an implemented UI with focused evidence, verification, and quality checks.
Skill Claude CodeCodex
Execute an approved frontend Work Plan autonomously through frontend implementation, quality fixes, commits, and final verification.
Skill Claude CodeCodex
Execute from codebase-scoped analysis to frontend design document creation including UI Spec.
Skill Claude CodeCodex
Create frontend work plan from design document with test skeleton generation.
Skill Claude CodeCodex
Reviews completed frontend implementation for governing-source compliance, scope economy, repository quality, and security, and applies user-approved React corrections.
Skill Claude CodeCodex
Execute an approved fullstack Work Plan autonomously with layer-aware task routing, quality fixes, commits, and final verification.
Skill Claude CodeCodex
Run the full-cycle implementation workflow for one outcome spanning backend and frontend layers.
Skill Claude CodeCodex
Orchestrate the complete implementation lifecycle from requirements through verified repository implementation.
Skill Claude CodeCodex
Creates a reviewed Work Plan with value-filtered integration/E2E test skeletons. Use when planning implementation from a Design Doc.
Skill Claude CodeCodex
Prepare repository-local execution tools when the user requests setup or a concrete build capability is unavailable.
Skill Claude CodeCodex
Proposes and, after user confirmation, creates or maintains docs/project-context/quality.yaml from repository-specific review requirements. Use when asked to generate or update a repository quality profile.
Skill Claude CodeCodex
Generate PRD and Design Docs from existing codebase through discovery, generation, verification, and review.
Skill Claude CodeCodex
Reviews completed implementation for governing-source compliance, scope economy, repository quality, and security, and applies user-approved corrections.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: