Corvus

Multi-agent development workflow for OpenCode.

Structured planning. Delegated execution. Quality gates at every boundary.

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Table of Contents

• About Corvus
• What Corvus Does
  • Usage
• Installation
  • Plugin Install (Recommended)
  • Manual Install
  • Customizing Models
• What's Included
  • Agents (15)
  • Commands (4)
  • Skills (18)
• How Corvus Works
• Corvus PR Review
• Project Structure
• Development
• Troubleshooting
• License

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About Corvus

In Norse mythology, Odin's ravens Huginn (thought) and Muninn (memory) fly across the world each day, gathering information and reporting back. Corvus works the same way — sending specialized agents out to research, explore, implement, and validate, then synthesizing their findings into a coherent whole.

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What Corvus Does

One agent to drive your entire workflow. Describe what you need, and Corvus handles the rest — clarifying requirements, exploring the codebase, planning, implementing, testing, and validating.

• Single point of entry — no need to pick the right agent or remember who does what
• Adaptive planning depth — automatically scales from zero-ceremony quick fixes to spec-driven workflows based on task complexity
• Full lifecycle management — from requirements through implementation to validation
• Context across phases — maintains coherence across a complex, multi-step task
• Quality gates at every boundary — objective and subjective validation before moving on

Usage

Have a complex task in mind? Tell @corvus what you need. It handles clarification, planning, implementation, and validation automatically — scaling its process to match the task:

@corvus fix the typo in the footer              # no plan — direct delegation
@corvus add a dark mode toggle with tests        # lightweight plan — minimal ceremony
@corvus refactor the payment module to use the new API  # standard plan — full workflow
@corvus redesign the plugin architecture         # spec-driven — formal specs + full workflow

Need something quick? Talk to @corvus directly, it'll know which specialists to involve:

@corvus find all auth files
@corvus review the login endpoint
@corvus how does JWT refresh rotation work?

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Installation

Plugin Install (Recommended)

npx corvus-ai
# or for a global install
npx corvus-ai --global

This adds corvus-ai@latest to your OpenCode plugin config. All agents, commands, and skills are loaded automatically.

Manual Install

Clone the repo and symlink the directories into your OpenCode config:

git clone https://github.com/NachoFLizaur/corvus.git
cd corvus

ln -s $(pwd)/agent ~/.config/opencode/agent
ln -s $(pwd)/command ~/.config/opencode/command
ln -s $(pwd)/skill ~/.config/opencode/skill

Or copy instead of symlinking:

cp -r agent/ ~/.config/opencode/agent/
cp -r command/ ~/.config/opencode/command/
cp -r skill/ ~/.config/opencode/skill/

Customizing Models

Corvus agents work with whichever model you've set up as default in opencode, but you can assign specific models per agent in your OpenCode config if you wish to:

{
  "plugin": ["corvus-ai"],
  "agent": {
    "corvus": {
      "model": "anthropic/claude-opus-4"
    },
    "code-implementer": {
      "model": "anthropic/claude-sonnet-4"
    },
    "code-explorer": {
      "model": "anthropic/claude-haiku-4"
    }
  }
}

Any agent field (model, temperature, tools, etc.) can be overridden this way. Your config takes precedence over the plugin defaults.

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What's Included

Agents (15)

Agent	Purpose
@corvus	Coordinator — orchestrates complex multi-step workflows
@corvus-auto	Autonomous Coordinator — zero-interruption workflow: auto-selects plan type, mandatory Phase 3.5, tests deferred to Phase 5, git commit/push/PR in Phase 6
@code-explorer	Find files, understand architecture, discover patterns
@code-implementer	Write production code with plan-approve workflow
@code-quality	Test, review, validate, security audit
@task-planner	Break complex features into subtasks
@plan-reviewer	High-accuracy plan review before implementation
@researcher	Technical questions, best practices
@requirements-analyst	Analyze requests, identify gaps, clarify requirements
@ux-dx-quality	Subjective quality: UX, DX, docs, architecture
@corvus-review	PR Review Coordinator — interactive multi-pass PR review with user gates
@corvus-review-auto	Autonomous PR Review — zero-interruption PR review with safety rails
@security-reviewer	Dedicated security analysis: OWASP Top 10, CWE, taint analysis
@pr-context-gatherer	PR-specific context gathering: diffs, dependencies, conventions
@pr-comment-writer	GitHub review posting: API payloads, error recovery, line validation

Commands (4)

Command	Purpose
/git-commit	Smart git commit with conventional commit message generation
/readme	Analyze commits and update README with relevant changes
/summary	Generate summary of current conversation for portability
/cleanup-subagents	Clean up subagent sessions

Skills (18)

Skills are loaded on-demand to minimize initial context size. Each Corvus phase has a dedicated skill that's loaded only when entering that phase.

Skill	Purpose
corvus-phase-0	Requirements analysis
corvus-phase-1	Discovery and research
corvus-phase-2	Planning and user approval
corvus-phase-4	Implementation loop
corvus-phase-5	Final validation
corvus-phase-6	Completion and summary
corvus-phase-7	Follow-up triage
corvus-extras	Utilities (subagent reference, todo patterns, error handling)
frontend-design	Frontend UI/UX design guidelines
deep-research	Deep research for complex technical questions
web-search	Quick web search for focused factual lookups

PR Review Skills:

Skill	Purpose
corvus-review-r0	PR intake, triage, config loading
corvus-review-r1	Parallel context gathering
corvus-review-r2	Multi-pass review orchestration
corvus-review-r3	Comment synthesis and filtering
corvus-review-r4	User gate / autonomous auto-proceed
corvus-review-r5	GitHub posting and completion
corvus-review-extras	Shared schemas, Conventional Comments, config

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How Corvus Works

Under the hood, Corvus follows a structured multi-phase workflow:

User Request
    │
    ▼
Phase 0a: Requirements Clarification (@requirements-analyst)
    │
    ├─── CLEAR ──────────────────────────────────► Plan-Type Selection
    └─── DISCOVERY_NEEDED ──► Phase 1 ──► Phase 0b ──► Plan-Type Selection
    │
    ▼
Phase 1: Discovery (@researcher + @code-explorer) [parallel]
    │
    ▼
Plan-Type Selection (complexity heuristic → user override)
    │
    ├─── No Plan ────────► Direct delegation (single task, done)
    ├─── Lightweight ────► Phase 2 (1 phase, 3-6 tasks, skip discovery + final validation)
    ├─── Standard ───────► Phase 2 (full workflow, unchanged)
    └─── Spec-Driven ───► Formal specs → Phase 2 (full workflow)
    │
    ▼
Phase 2: Planning (@task-planner creates MASTER_PLAN.md)
    │
    ▼
Phase 3: User Approval (single approval gate)
    │
    ▼
User Choice: "Start Implementation" → Phase 4
             "High Accuracy Review" → Phase 3.5
    │
    ▼
Phase 3.5: Plan Review (@plan-reviewer) [optional]
    │   OKAY → Phase 4
    │   REJECT → @task-planner fixes → User chooses: re-review or proceed
    │
    ▼
Phase 4: Implementation Loop (per-PHASE, not per-task)
    │   4a: @code-implementer (all phase tasks, parallel where possible)
    │   4b: @code-quality (entire phase, with failure attribution)
    │       FAIL → FAILURE_ANALYSIS → fix → revalidate
    │   4c: Update master plan → next phase
    │
    ▼
Phase 5: Final Validation
    │   5a: @code-quality (comprehensive)
    │   5b: @ux-dx-quality (if any task flagged it)
    │
    ▼
Phase 6: Completion

Key features:

• Adaptive plan-type selection: Scores task complexity across 6 dimensions, recommends one of 4 tiers (No Plan → Lightweight → Standard → Spec-Driven), user can override
• Phase-level validation: Quality checks run once per phase (~70% fewer subagent invocations)
• Parallel execution: Independent tasks within a phase run simultaneously
• Conditional clarification: Phase 0b skipped when requirements are already clear
• Two-tier quality gates: Objective (@code-quality) at phase boundaries + Subjective (@ux-dx-quality) at feature completion
• Failure attribution: Quality gate identifies exactly which task(s) failed
• Learning loops: Analyze failures before fixing, extract learnings after success
• Optional plan review: Phase 3.5 validates plan quality before implementation begins

📖 Detailed Documentation: See docs/CORVUS-STATE-MACHINE.md for complete state machine diagrams, parallel execution rules, and constraint tables.

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Corvus PR Review

Corvus PR Review is a multi-pass code review system that brings the same structured, multi-agent approach to pull request reviews. It runs dedicated review passes in parallel, synthesizes findings, and posts formatted reviews to GitHub — either interactively with user gates or fully autonomously.

When to Use

• You want a thorough, structured review that goes beyond surface-level linting
• You need security-focused analysis with OWASP/CWE knowledge
• You want consistent review quality across your team
• You want to preview and edit review comments before posting

Usage

@corvus-review review PR #123
@corvus-review review https://github.com/owner/repo/pull/123
@corvus-review-auto #456    # autonomous, auto-posts

Workflow

User: "Review PR #123"
    │
    ▼
R0: Intake & Triage (parse PR, fetch metadata, load config)
    │
    ▼
R1: Context Gathering [parallel]
    ├── @pr-context-gatherer (files, deps, tests, conventions)
    └── @researcher (issues, CI, advisories)
    │
    ▼
R2: Multi-Pass Review
    ├── Pass 1: Architecture & Design (@ux-dx-quality)     ─┐
    ├── Pass 2: Logic & Correctness (@code-quality)         ├─ parallel
    ├── Pass 3: Security (@security-reviewer)               ─┘
    └── Pass 4: Conventions & Polish (max 3 nits)           ─ sequential
    │
    ▼
R3: Comment Synthesis (dedup, filter, severity, nit budget)
    │
    ▼
R4: User Gate → Post / Edit / Save Locally / Re-run
    │
    ▼
R5: Post to GitHub via @pr-comment-writer

Key Features

• Multi-pass review following Google's priority order (correctness → design → security → style)
• Dedicated security agent with OWASP Top 10 and CWE knowledge base
• Aggressive false-positive filtering with confidence scores and nit budget enforcement
• Conventional Comments format for consistent, actionable feedback
• Configurable via .opencode/review-config.yaml for per-project tuning
• Interactive and autonomous modes — preview before posting, or let it run hands-free
• Just-in-time context gathering — no pre-built index needed, works on any repo

Configuration

# .opencode/review-config.yaml
severity_threshold: "nitpick"
max_nits: 3
passes:
  architecture: true
  correctness: true
  security: true
  conventions: true
path_rules:
  - pattern: "src/auth/**"
    elevate_security: true
  - pattern: "vendor/**"
    skip_passes: ["conventions"]

📖 Detailed Documentation: See docs/CORVUS-REVIEW-SKILL-SET.md for complete review workflow documentation, configuration reference, and Conventional Comments specification.

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Project Structure

.
├── agent/                  # Agent definitions (15 agents)
│   ├── corvus.md           # Implementation orchestrator
│   ├── corvus-auto.md      # Autonomous implementation orchestrator
│   ├── corvus-review.md    # PR review orchestrator
│   ├── corvus-review-auto.md # Autonomous PR review orchestrator
│   ├── security-reviewer.md  # Security analysis specialist
│   ├── pr-context-gatherer.md # PR context gathering
│   ├── pr-comment-writer.md   # GitHub review posting
│   └── ...                 # (8 more existing agents)
├── command/                # Custom slash commands (4 commands)
├── skill/                  # On-demand skills (18 skills)
│   ├── corvus-phase-*/     # Corvus workflow phases (7)
│   ├── corvus-review-*/    # PR review phases (7)
│   └── *.../               # Utilities (corvus-extras, frontend-design, deep-research, web-search)
├── src/                    # Plugin source code
├── docs/                   # Detailed documentation
│   ├── CORVUS-STATE-MACHINE.md
│   └── CORVUS-REVIEW-SKILL-SET.md
├── AGENTS.md
└── README.md

See AGENTS.md for delegation instructions and docs/CORVUS-STATE-MACHINE.md for detailed workflow documentation.

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Development

# Install dependencies
bun install

# Run tests
bun test

# Build
bun run build

# Type check
bun x tsc --noEmit

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Troubleshooting

Plugin not loading — Verify your OpenCode config (~/.config/opencode/config.json or .opencode/config.json) has "corvus-ai": true under plugins.

Agents not appearing — Make sure bun install or npm install completed successfully. The package must be present in node_modules with its agent/, command/, and skill/ directories.

Skills not found — Skills are loaded from the package's skill/ directory at runtime. If you used the manual install method, verify your symlinks point to the correct location (ls -la ~/.config/opencode/skill/).

Duplicate agents — If you have both the plugin install and manual symlinks active, agents may appear twice. Pick one installation method and remove the other.

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License

MIT © Nacho F. Lizaur