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89 skills and 38 specialized agents that enforce proven engineering practices for AI-assisted development. TDD, systemat
Proven engineering practices, enforced through skills.
Ring is a comprehensive skills library and workflow system for AI agents that transforms how AI assistants approach software development. Currently implemented as a Claude Code plugin marketplace with 4 active plugins, 71 skills, and 33 agents (see .claude-plugin/marketplace.json for current versions), the skills themselves are agent-agnostic and can be used with any AI agent system. Ring provides battle-tested patterns, mandatory workflows, and systematic approaches across the entire software delivery value chain.
Without Ring, AI assistants often:
Ring solves this by:
Ring is Lerian-first, open-source-friendly. Design decisions prioritize the Lerian engineering team's daily needs while keeping the architecture clean and reusable for external adoption. This means:
Planning & Analysis Agents (default plugin):
ring:review-slicer - Review slicer (groups large multi-themed PRs into thematic slices for focused parallel review)ring:codebase-explorer - Deep architecture analysis (deep-analysis, complements built-in Explore)ring:reviewing-code skill to orchestrate parallel review workflowDeveloper Agents (dev-team plugin):
ring:backend-go - Go backend specialist for financial systemsring:backend-ts - TypeScript/Node.js backend specialist (Express, NestJS, Fastify)ring:bff-ts - BFF & React/Next.js frontend with Clean Architecturering:ui-designer - Visual design specialistring:frontend - Senior Frontend Engineer (React/Next.js)ring:devops - DevOps and infrastructure specialistring:prompt-reviewer - Agent Quality Analystring:qa - Backend QA specialist (unit, integration, load, chaos)ring:qa-frontend - Frontend QA specialist (accessibility, visual, E2E, performance)ring:sre - Observability and reliability specialistring:ui-engineer - UI component specialist (design systems, accessibility)ring:helm - Helm chart specialist (chart structure, security, Lerian conventions)ring:code-reviewer - Foundation review (architecture, code quality, design patterns)ring:logic-reviewer - Correctness review (domain logic, requirements, edge cases)ring:security-reviewer - Safety review (vulnerabilities, OWASP, authentication)ring:test-reviewer - Test quality review (coverage, edge cases, assertions, test anti-patterns)ring:nil-reviewer - Nil/null safety review (traces pointer risks, missing guards, panic paths)ring:dead-code-reviewer - Dead code review (orphaned code detection, reachability analysis, dead dependency chains)ring:commons-reviewer - lib-commons package usage review (lifecycle, tenancy, http, idempotency, security, database, messaging, outbox; reinvented-wheel opportunities)ring:obs-reviewer - Conditional specialist for tracing, metrics, logging, runtime recovery, redaction, constants, and SafeGo implicationsring:systemplane-reviewer - Conditional specialist for runtime config, hot-reload knobs, admin config, tenant-scoped settings, and systemplane importsring:streaming-reviewer - Conditional specialist for business events, outbox, producers, broker publishing, CloudEvents, manifests, and catalogsring:tenancy-reviewer - Multi-tenant usage review (lib-commons/multitenancy patterns, tenant isolation, JWT tenantId propagation)ring:perf-reviewer - Performance review (code hotspots, infra misconfigurations, Go/TypeScript/Python)Standards Compliance: Refactor-capable dev-team agents produce a
## Standards Complianceoutput section with conditional requirement:
- Optional when invoked directly or via
ring:running-dev-cycle- MANDATORY when invoked from
ring:planning-backend-refactor(triggered by**MODE: ANALYSIS ONLY**in prompt)When mandatory, agents load Ring standards via WebFetch and produce comparison tables with:
- Current Pattern vs Expected Pattern
- Severity classification (Critical/High/Medium/Low)
- File locations and migration recommendations
See
dev-team/docs/standards/*.mdfor standards source. Cross-references: CLAUDE.md (Standards Compliance section),dev-team/skills/planning-backend-refactor/SKILL.md
Product Research Agents (ring-pm-team plugin):
ring:repo-researcher - Repository structure and codebase analysisring:web-researcher - Industry best practices researchring:docs-researcher - Framework documentation researchring:product-designer - Product design and UX researchTechnical Writing Agents (ring-tw-team plugin):
ring:guide-writer - Functional documentation (guides, tutorials, conceptual docs)ring:api-writer - API reference documentation (endpoints, schemas, examples)ring:docs-reviewer - Documentation quality review (voice, tone, structure, completeness)Plugin versions are managed in .claude-plugin/marketplace.json
The following plugins have been archived and are not actively maintained. They remain available in .archive/ for reference:
| Plugin | Description | Status |
|---|---|---|
pmm-team | Product Marketing (GTM, positioning, competitive intel) | Archived - functionality may be restored based on demand |
finance-team | Financial planning and analysis | Archived - under evaluation |
ops-team | Operations management | Archived - under evaluation |
To restore an archived plugin, move its folder from .archive/ to the root directory and register it in marketplace.json.
Ring works across multiple AI development platforms:
| Platform | Native manifest | Symlink installer | Status |
|---|---|---|---|
| Claude Code | ✅ marketplace.json | ✅ --claude | Source of truth |
| Codex | ✅ .codex-plugin/ | ✅ --codex (built) | Both paths work |
| OpenCode | ✅ .opencode/ | ✅ --opencode (built) | Both paths work |
| Cursor | ✅ .cursor-plugin/ | ❌ not in installer | Native only |
| Factory AI | ❌ | ✅ --factory | Installer only |
Two install mechanisms:
opencode.json, Cursor plugin marketplace, Codex plugin manifest). No local build step, no manual symlink work. Best for end users and CI.ring-install.sh) — symlinks from your local harness config dir into a cloned Ring repo. For Codex/OpenCode, the installer builds a transformed tree at .ring-build/ first (namespace + frontmatter rewrites). Best for local development with hot-reload against the source tree.See the Native plugin install and Symlink installer sub-sections below for usage.
Each Ring plugin ships native manifests for Claude Code, Codex, Cursor, and OpenCode. The harness installs the plugin directly from this repo via its own package manager — no transformation step, no local installer.
| Harness | Mechanism | Per-plugin entry points |
|---|---|---|
| Claude Code | .claude-plugin/marketplace.json (root) | All 4 plugins enumerated in one marketplace file |
| Codex | <plugin>/.codex-plugin/plugin.json | default · dev-team · pm-team · tw-team |
| Cursor | <plugin>/.cursor-plugin/plugin.json | default · dev-team · pm-team · tw-team |
| OpenCode | <plugin>/.opencode/ (INSTALL + JS plugin) | default · dev-team · pm-team · tw-team |
ring-default is the foundation plugin — install it alongside any other Ring plugin since it provides the using-ring bootstrap that orients agent behavior. Example for OpenCode:
{
"plugin": [
"ring-default@git+https://github.com/lerianstudio/ring.git#main",
"ring-dev-team@git+https://github.com/lerianstudio/ring.git#main"
]
}
Each harness's INSTALL.md (for OpenCode) or plugin.json (for Codex/Cursor) carries the exact install command for that platform.
ring-install.sh symlinks your harness's local config dir into this cloned Ring repo. For Codex and OpenCode, it first builds a transformed tree at .ring-build/ (namespace + frontmatter rewrites required by those tools).
Supported targets: Claude Code, Factory AI, OpenCode, Codex. Not supported by the installer: Cursor (use the native plugin install above).
# Clone the repo
git clone https://github.com/lerianstudio/ring.git ~/ring
cd ~/ring
# Interactive menu (lets you pick targets)
bash ring-install.sh
# Or target specific harnesses without the prompt:
bash ring-install.sh --claude # Claude Code (per-file symlinks)
bash ring-install.sh --factory # Factory AI (per-file symlinks)
bash ring-install.sh --opencode # OpenCode (builds .ring-build/opencode/ first)
bash ring-install.sh --codex # Codex (builds .ring-build/codex/ first)
bash ring-install.sh --all # All four supported targets
bash ring-install.sh install --opencode --codex # install symlinks for selected targets
bash ring-install.sh remove # remove all Ring symlinks
bash ring-install.sh build # rebuild .ring-build/{opencode,codex} only
bash ring-install.sh clean # remove .ring-build/ outputs
bash ring-install.sh doctor # verify install + build outputs
bash ring-install.sh all --all -y # clean + build + install for all targets, no prompt
Flags: --yes / -y (skip confirmation), --dry-run (preview without changes), --force (back up non-symlink collisions), --verbose.
For Claude Code users, you can also install from the marketplace:
# Clone the marketplace repository
git clone https://github.com/lerianstudio/ring.git ~/ring
# Skills auto-load at session start via hooks
# No additional configuration needed for Claude Code
The ring:reviewing-code pipeline uses Mithril, an external code analysis tool installed via go install. Mithril performs static analysis, AST extraction, call graph generation, and context compilation for AI-assisted code review.
Install via go install github.com/lerianstudio/mithril@latest. See the Mithril repository for full installation details and release notes.
When you start a new Claude Code session with Ring installed, you'll see:
## Available Skills:
- ring:using-ring (Check for skills BEFORE any task)
- ring:test-driven-development (RED-GREEN-REFACTOR cycle)
- ring:reviewing-code (9 defaults + conditional specialist dispatch)
- ring:exploring-codebases (Two-phase codebase exploration)
... and 73 more skills
Before ANY action → Check skills
Before ANY tool → Check skills
Before ANY code → Check skills
RED → Write failing test → Watch it fail
GREEN → Minimal code → Watch it pass
REFACTOR → Clean up → Stay green
Testing & Quality (2):
ring:test-driven-development - Write test first, watch fail, minimal codering:fixing-lint - Parallel lint fixing with agent dispatchCollaboration & Planning (5):
ring:reviewing-code - Parallel 9 defaults + conditional specialist dispatch with severity-based handlingring:creating-worktrees - Isolated developmentring:committing-changes - Smart commit organization with atomic grouping, conventional commits, and trailersring:writing-plans - Author phased implementation plans (phase → epic → task) from a spec; first phase detailed into dispatch-ready tasks, later phases epic-level for rolling-wave elaborationring:executing-plans - Rolling-wave execution of a phased plan: implement the detailed phase, checkpoint with the user, elaborate the next phase against the real codebase, repeatMeta Skills (3):
ring:using-ring - Mandatory skill discoveryring:writing-skills - TDD for documentationring:testing-skills-with-subagents - Skill validationIntegration (1):
ring:delegating-to-gandalf - Send tasks to Gandalf (AI team member) via webhook for Slack, Google Workspace, and Jira interactionsSession & Learning (4):
ring:exploring-codebases - Two-phase codebase explorationring:generating-release-guides - Generate Ops Update Guide from git diff analysisring:visualizing - Generate self-contained HTML pages to visually explain systems, code changes, and dataring:creating-handoffs - Create handoff documents capturing session state for seamless context-clear and resumeAudit & Readiness (1):
ring:auditing-production-readiness - 44-dimension production readiness audit; runs explorers in batches of up to 10, appends incrementally to a single report; output: scored report (0-430, max 440 with multi-tenant) with severity ratings. See default/skills/auditing-production-readiness/SKILL.md for invocation and implementation details.Orchestration & Refactoring (7):
ring:using-dev-team - Introduction to developer specialist agentsring:running-dev-cycle - Lean backend development cycle orchestrator driven by a rolling-wave phased plan (phases → epics E-X.Y → tasks T-X.Y.Z): Gate 0 implementation-owned TDD/coverage/docker-compose/runtime/delivery verification per task, Gate 8 review + Gate 9 validation per epic, phase boundary (Step 11.5) closes each phase and elaborates the next against the real codebasering:running-dev-cycle-frontend - Lean frontend development cycle orchestrator on the same rolling-wave phased plan (Gate 0 per task, Gate 7 review per epic, Gate 8 validation per task, phase boundary per phase)ring:planning-backend-refactor - Backend/codebase standards analysisring:planning-frontend-refactor - Frontend standards analysis and task generationring:planning-codebase-simplification - Whole-codebase structural simplification sweep (hunts unjustified abstractions, adapters, shims; KILL/REVIEW/KEEP output; DELETE-by-default burden of proof for pre-public applications)ring:managing-dev-cycle - Development cycle state management (phase/epic status reporting and cancellation)Backend Gate Skills:
ring:implementing-tasks - Gate 0: TDD implementationring:adding-multi-tenancy - Multi-tenant adaptation (database-per-tenant isolation, integrated into Gate 0)ring:hardening-dockerfiles - Docker image security audit for Docker Hub Health Score grade Aring:creating-helm-charts - Helm chart creation and maintenance following Lerian conventionsring:mapping-service-resources - Service/module/resource hierarchy scanner for dispatch layerring:implementing-readyz - Comprehensive readiness probes (/readyz) with per-dependency status and TLS validationring:instrumenting-streaming-events - Wire lib-streaming event emission from a validated instrumentation mapTesting & Validation:
ring:detecting-goroutine-leaks - Goroutine leak detection and regression testingring:load-testing-with-k6 - k6 load test generation following Lerian platform conventionsring:validating-acceptance-criteria - Gate 9: User approvalring:writing-dev-reports - Assertiveness scoring and metricsring:verifying-code - Atomic Go code verification with MERGE_READY/NEEDS_FIX verdictMigration & Reference (6):
ring:using-lib-commons - Comprehensive reference for lib-commons v5.0.2 (Lerian's shared Go library with 30+ packages)ring:using-runtime - Deep reference and 6-angle audit for lib-observability/runtime: SafeGo, panic recovery, observability trident, policy selection, framework integration. Catches naked goroutine launches that cause silent production failures.ring:using-assert - Deep reference and 6-angle audit for lib-observability/assert: production runtime assertions with observability trident, full domain predicate catalog (double-entry, transaction state machine, financial validations), AssertionError unwrapping patterns. Converts financial invariants into production-enforced rules.ring:migrating-to-lib-systemplane - Migrate Lerian Go services from .env/YAML config to systemplane (database-backed hot-reloadable config)ring:generating-llms-txt - Generate or audit llms.txt files following llmstxt.org spec for AI-friendly repository entry pointsring:applying-licenses - Repository license management (Apache 2.0, Elastic v2, Proprietary)Security (1):
ring:auditing-dependency-security - Supply-chain gate for dependency installations (validates identity, vulnerabilities, suspicious signals)Frontend Quality Skills (1):
ring:checking-frontend-quality - Frontend quality checks in modes accessibility (axe-core/WCAG), visual (snapshots/viewports), e2e (Playwright 3-browser), performance (Lighthouse/Core Web Vitals), or all; dispatches ring:qa-frontendFrontend and backend dev-cycle workflows both use
ring:reviewing-code(core plugin) as the review gate.
Pre-Development Workflow (includes ring:using-pm-team + 9 gates):
ring:using-pm-team - Introduction to product planning workflowring:researching-features - Research phase (parallel agents)ring:writing-prds - Business requirements (WHAT/WHY)ring:mapping-feature-relationships - Feature relationshipsring:writing-trds - Technical architecture (HOW)ring:designing-api-contracts - Component contractsring:designing-data-model - Entity relationshipsring:pinning-dependency-versions - Technology selectionring:decomposing-phases-and-epics - Phased plan: phases + epics, rolling wavering:detailing-tasks - Phase 1 task detailing: dispatch-ready tasks, no codeWorkflow Orchestrators:
ring:planning-small-features - 5-gate orchestrator for small features (<2 days)ring:planning-large-features - 10-gate orchestrator for large features (>=2 days)Additional Planning Skills:
ring:validating-ux-completeness - Gate 1.5/2.5: Design validation for UI featuresring:planning-delivery - Gate 4 (Small) / Gate 9 (Large): Delivery roadmap and timelinering:tracking-delivery - Delivery progress tracking against roadmapring:reconciling-predev-docs - Deep cross-reference review of pre-dev documentation artifactsDocumentation Creation:
ring:using-tw-team - Introduction to technical writing specialistsring:structuring-documentation - Document hierarchy and organizationring:applying-voice-and-tone - Voice and tone guidelines (assertive, encouraging, human)ring:reviewing-docs - Quality checklist and review processUser: "Add user authentication to the app"
Claude: I'm using ring:planning-small-features to scope this feature...
[Pre-dev workflow: PRD, TRD, tasks]
Claude: I'm using ring:test-driven-development to implement...
[RED-GREEN-REFACTOR cycle for each component]
Claude: I'm using ring:reviewing-code to validate...
[9 defaults + conditional specialist parallel dispatch]
User: "The app crashes when clicking submit"
Claude: Investigating the crash:
Phase 1: [Gathering evidence]
Phase 2: [Pattern analysis]
Phase 3: [Hypothesis testing]
Phase 4: [Implementing fix with test]
User: "Plan an e-commerce platform"
Claude: I'll use the pre-dev workflow to plan this systematically...
Gate 1: PRD Creation [Business requirements]
Gate 2: Feature Map [Domain groupings]
Gate 3: TRD Creation [Architecture patterns]
... [Through all 10 gates]
User: "Review my authentication implementation"
Claude: Dispatching all 9 default reviewers plus triggered conditional specialists in parallel...
[Launches ring:code-reviewer, ring:logic-reviewer, ring:security-reviewer,
ring:test-reviewer, ring:nil-reviewer,
ring:dead-code-reviewer, ring:perf-reviewer, ring:tenancy-reviewer,
ring:commons-reviewer simultaneously]
Conditional specialists trigger only when the diff touches their stack:
lib-observability, lib-systemplane, or lib-streaming.
Code reviewer: PASS. Clean architecture, good tests.
Business reviewer: FAIL. Missing password reset flow (HIGH severity).
Security reviewer: FAIL. JWT secret hardcoded (CRITICAL severity).
Test reviewer: PASS. Good coverage, assertions well-structured.
Nil-safety reviewer: PASS. No unguarded nil dereferences found.
Performance reviewer: PASS. No hotspots or goroutine leaks found.
Multi-tenant reviewer: PASS. No multi-tenant code in scope.
lib-commons reviewer: PASS. Correct shared-library usage, no reinvented wheels detected.
Aggregating issues by severity:
- CRITICAL: JWT secret hardcoded in auth.ts:42
- HIGH: Password reset flow missing from requirements
Review report complete. No files changed by reviewers.
Fixes require a separate implementation step, then a new review run.
Key benefits:
Monorepo Marketplace - Multiple specialized plugin collections:
ring/ # Monorepo root
├── .claude-plugin/
│ └── marketplace.json # Multi-plugin marketplace config (4 active plugins)
├── default/ # Core Ring plugin (ring-default)
│ ├── skills/ # 16 core skills
│ │ ├── skill-name/
│ │ │ └── SKILL.md # Skill definition with frontmatter
│ │ └── shared-patterns/ # Universal patterns (15 patterns)
│ ├── hooks/ # Session initialization
│ │ ├── hooks.json # Hook configuration
│ │ ├── session-start.sh # Loads skills at startup
│ │ └── generate-skills-ref.py # Auto-generates quick reference
│ ├── agents/ # 2 planning/analysis agents
│ │ ├── review-slicer.md # Review slicing for large PRs (`ring:review-slicer`)
│ │ └── codebase-explorer.md # Deep architecture analysis (`ring:codebase-explorer`)
│ └── docs/ # Documentation
├── dev-team/ # Developer Agents plugin (ring-dev-team) - 33 skills, 24 agents
│ └── agents/ # 24 specialized developer/reviewer agents
│ ├── backend-go.md # Go backend specialist (`ring:backend-go`)
│ ├── backend-ts.md # TypeScript/Node.js backend specialist (`ring:backend-ts`)
│ ├── bff-ts.md # BFF & React/Next.js specialist (`ring:bff-ts`)
│ ├── devops.md # DevOps and infrastructure specialist (`ring:devops`)
│ ├── ui-designer.md # Visual design specialist (`ring:ui-designer`)
│ ├── frontend.md # Frontend engineer (`ring:frontend`)
│ ├── helm.md # Helm chart specialist (`ring:helm`)
│ ├── code-reviewer.md # Foundation review (`ring:code-reviewer`)
│ ├── logic-reviewer.md # Correctness review (`ring:logic-reviewer`)
│ ├── security-reviewer.md # Safety review (`ring:security-reviewer`)
│ ├── test-reviewer.md # Test quality review (`ring:test-reviewer`)
│ ├── nil-reviewer.md # Nil/null safety review (`ring:nil-reviewer`)
│ ├── dead-code-reviewer.md # Dead code analysis (`ring:dead-code-reviewer`)
│ ├── commons-reviewer.md # lib-commons usage review (`ring:commons-reviewer`)
│ ├── obs-reviewer.md # Conditional observability review (`ring:obs-reviewer`)
│ ├── systemplane-reviewer.md # Conditional runtime-config review (`ring:systemplane-reviewer`)
│ ├── streaming-reviewer.md # Conditional event producer review (`ring:streaming-reviewer`)
│ ├── tenancy-reviewer.md # Multi-tenant usage review (`ring:tenancy-reviewer`)
│ ├── perf-reviewer.md # Performance review (`ring:perf-reviewer`)
│ ├── prompt-reviewer.md # Agent quality reviewer (`ring:prompt-reviewer`)
│ ├── qa.md # Backend QA specialist (`ring:qa`)
│ ├── qa-frontend.md # Frontend QA specialist (`ring:qa-frontend`)
│ ├── sre.md # Observability and reliability specialist (`ring:sre`)
│ └── ui-engineer.md # UI component specialist (`ring:ui-engineer`)
├── pm-team/ # Product Planning plugin (ring-pm-team)
│ └── skills/ # 18 product planning skills
│ ├── writing-prds/ # PRD authoring
│ ├── writing-trds/ # TRD authoring
│ ├── designing-api-contracts/ # API contract design
│ ├── designing-data-model/ # Data model design
│ └── detailing-tasks/ # Task detailing
└── tw-team/ # Technical Writing plugin (ring-tw-team)
├── skills/ # 4 documentation skills
├── agents/ # 3 technical writing agents
└── hooks/ # SessionStart hook
For core Ring skills:
Create the skill directory
mkdir default/skills/your-skill-name
Write SKILL.md with frontmatter
---
name: ring:your-skill-name
description: Single paragraph (≤500 chars target, 1,536 cap). States WHAT the skill does, WHEN to invoke, and WHEN to skip.
---
# Your Skill Name
## When to use
- Specific condition that mandates this skill
- Another trigger condition
## Skip when
- When NOT to use → alternative skill
- Another exclusion
Schema fields:
name (must use ring: prefix), descriptionargument-hint, allowed-tools, model, disable-model-invocation, user-invocable, paths## When to use, ## Skip when, ## Sequence, ## Related). See docs/FRONTMATTER_SCHEMA.md for the canonical schema.Update documentation
default/hooks/generate-skills-ref.pySubmit PR
git checkout -b feat/your-skill-name
git add default/skills/your-skill-name
git commit -m "feat(skills): add your-skill-name for X"
gh pr create
For product/team-specific skills:
Create plugin structure
mkdir -p product-xyz/{skills,agents,hooks,lib}
Register in marketplace
Edit .claude-plugin/marketplace.json:
{
"name": "ring-product-xyz",
"description": "Product XYZ specific skills",
"version": "0.1.0",
"source": "./product-xyz",
"homepage": "https://github.com/lerianstudio/ring/tree/product-xyz"
}
Follow core plugin structure
default/product-xyz/hooks/hooks.json for initializationproduct-xyz/skills/Ring embodies these principles:
Teams using Ring report:
Ring is built on decades of collective software engineering wisdom, incorporating patterns from:
Special thanks to the Lerian Team for battle-testing these skills in production.
MIT - See LICENSE file
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