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PROJECT KNOWLEDGE BASE

Generated: 2026-02-16T14:58:00+09:00 Commit: 28cd34c3 Branch: fuck-v1.2

CRITICAL: PULL REQUEST TARGET BRANCH (NEVER DELETE THIS SECTION)

THIS SECTION MUST NEVER BE REMOVED OR MODIFIED

Git Workflow

master (deployed/published)
   ↑
  dev (integration branch)
   ↑
feature branches (your work)

Rules (MANDATORY)

Rule Description
ALL PRs → dev Every pull request MUST target the dev branch
NEVER PR → master PRs to master are automatically rejected by CI
"Create a PR" = target dev When asked to create a new PR, it ALWAYS means targeting dev
Merge commit ONLY Squash merge is disabled in this repo. Always use merge commit when merging PRs.

Why This Matters

  • master = production/published npm package
  • dev = integration branch where features are merged and tested
  • Feature branches → dev → (after testing) → master
  • Squash merge is disabled at the repository level — attempting it will fail

If you create a PR targeting master, it WILL be rejected. No exceptions.

CRITICAL: OPENCODE SOURCE CODE REFERENCE (NEVER DELETE THIS SECTION)

THIS SECTION MUST NEVER BE REMOVED OR MODIFIED

This is an OpenCode Plugin

Oh-My-OpenCode is a plugin for OpenCode. You will frequently need to examine OpenCode's source code to:

  • Understand plugin APIs and hooks
  • Debug integration issues
  • Implement features that interact with OpenCode internals
  • Answer questions about how OpenCode works

How to Access OpenCode Source Code

When you need to examine OpenCode source:

  1. Clone to system temp directory:

    git clone https://github.com/sst/opencode /tmp/opencode-source

  2. Explore the codebase from there (do NOT clone into the project directory)

  3. Clean up when done (optional, temp dirs are ephemeral)

Librarian Agent: YOUR PRIMARY TOOL for Plugin Work

CRITICAL: When working on plugin-related tasks or answering plugin questions:

Scenario Action
Implementing new hooks Fire librarian to search OpenCode hook implementations
Adding new tools Fire librarian to find OpenCode tool patterns
Understanding SDK behavior Fire librarian to examine OpenCode SDK source
Debugging plugin issues Fire librarian to find relevant OpenCode internals
Answering "how does OpenCode do X?" Fire librarian FIRST

DO NOT guess or hallucinate about OpenCode internals. Always verify by examining actual source code via librarian or direct clone.

CRITICAL: ENGLISH-ONLY POLICY (NEVER DELETE THIS SECTION)

THIS SECTION MUST NEVER BE REMOVED OR MODIFIED

All Project Communications MUST Be in English

Context Language Requirement
GitHub Issues English ONLY
Pull Requests English ONLY (title, description, comments)
Commit Messages English ONLY
Code Comments English ONLY
Documentation English ONLY
AGENTS.md files English ONLY

If you're not comfortable writing in English, use translation tools. Broken English is fine. Non-English is not acceptable.

OVERVIEW

OpenCode plugin (oh-my-opencode): multi-model agent orchestration with 11 specialized agents, 41 lifecycle hooks across 7 event types, 26 tools (LSP, AST-Grep, delegation, task management), full Claude Code compatibility layer, 4-scope skill loading, background agent concurrency, tmux integration, and 3-tier MCP system. "oh-my-zsh" for OpenCode.

STRUCTURE

oh-my-opencode/
├── src/
│   ├── agents/              # 11 AI agents — see src/agents/AGENTS.md
│   ├── hooks/               # 41 lifecycle hooks — see src/hooks/AGENTS.md
│   ├── tools/               # 26 tools — see src/tools/AGENTS.md
│   ├── features/            # Background agents, skills, CC compat — see src/features/AGENTS.md
│   ├── shared/              # Cross-cutting utilities — see src/shared/AGENTS.md
│   ├── cli/                 # CLI installer, doctor — see src/cli/AGENTS.md
│   ├── mcp/                 # Built-in MCPs — see src/mcp/AGENTS.md
│   ├── config/              # Zod schema — see src/config/AGENTS.md
│   ├── plugin-handlers/     # Config loading pipeline — see src/plugin-handlers/AGENTS.md
│   ├── plugin/              # Plugin interface composition (21 files)
│   ├── index.ts             # Main plugin entry (106 lines)
│   ├── create-hooks.ts      # Hook creation coordination (62 lines)
│   ├── create-managers.ts   # Manager initialization (80 lines)
│   ├── create-tools.ts      # Tool registry composition (54 lines)
│   ├── plugin-interface.ts  # Plugin interface assembly (66 lines)
│   ├── plugin-config.ts     # Config loading orchestration (180 lines)
│   └── plugin-state.ts      # Model cache state (12 lines)
├── script/                  # build-schema.ts, build-binaries.ts, publish.ts, generate-changelog.ts
├── packages/                # 11 platform-specific binary packages
└── dist/                    # Build output (ESM + .d.ts)

INITIALIZATION FLOW

OhMyOpenCodePlugin(ctx)
  1. injectServerAuthIntoClient(ctx.client)
  2. startTmuxCheck()
  3. loadPluginConfig(ctx.directory, ctx)      → OhMyOpenCodeConfig
  4. createFirstMessageVariantGate()
  5. createModelCacheState()
  6. createManagers(ctx, config, tmux, cache)  → TmuxSessionManager, BackgroundManager, SkillMcpManager, ConfigHandler
  7. createTools(ctx, config, managers)         → filteredTools, mergedSkills, availableSkills, availableCategories
  8. createHooks(ctx, config, backgroundMgr)   → 41 hooks (core + continuation + skill)
  9. createPluginInterface(...)                 → 7 OpenCode hook handlers
 10. Return plugin with experimental.session.compacting

WHERE TO LOOK

Task Location Notes
Add agent src/agents/ Create .ts with factory, add to agentSources in builtin-agents/
Add hook src/hooks/ Create dir, register in src/plugin/hooks/create-*-hooks.ts
Add tool src/tools/ Dir with index/types/constants/tools.ts
Add MCP src/mcp/ Create config, add to createBuiltinMcps()
Add skill src/features/builtin-skills/ Create .ts in skills/
Add command src/features/builtin-commands/ Add template + register in commands.ts
Config schema src/config/schema/ 21 schema component files, run bun run build:schema
Plugin config src/plugin-handlers/config-handler.ts JSONC loading, merging, migration
Background agents src/features/background-agent/ manager.ts (1701 lines)
Orchestrator src/hooks/atlas/ Main orchestration hook (1976 lines)
Delegation src/tools/delegate-task/ Category routing (constants.ts 569 lines)
Task system src/features/claude-tasks/ Task schema, storage, todo sync
Plugin interface src/plugin/ 21 files composing hooks, handlers, registries

TDD (Test-Driven Development)

MANDATORY. RED-GREEN-REFACTOR:

  1. RED: Write test → bun test → FAIL
  2. GREEN: Implement minimum → PASS
  3. REFACTOR: Clean up → stay GREEN

Rules:

  • NEVER write implementation before test
  • NEVER delete failing tests — fix the code
  • Test file: *.test.ts alongside source (176 test files)
  • BDD comments: //#given, //#when, //#then

CONVENTIONS

  • Package manager: Bun only (bun run, bun build, bunx)
  • Types: bun-types (NEVER @types/node)
  • Build: bun build (ESM) + tsc --emitDeclarationOnly
  • Exports: Barrel pattern via index.ts
  • Naming: kebab-case dirs, createXXXHook/createXXXTool factories
  • Testing: BDD comments, 176 test files, 1130 TypeScript files
  • Temperature: 0.1 for code agents, max 0.3
  • Modular architecture: 200 LOC hard limit per file (prompt strings exempt)

ANTI-PATTERNS

Category Forbidden
Package Manager npm, yarn — Bun exclusively
Types @types/node — use bun-types
File Ops mkdir/touch/rm/cp/mv in code — use bash tool
Publishing Direct bun publish — GitHub Actions only
Versioning Local version bump — CI manages
Type Safety as any, @ts-ignore, @ts-expect-error
Error Handling Empty catch blocks
Testing Deleting failing tests, writing implementation before test
Agent Calls Sequential — use task parallel
Hook Logic Heavy PreToolUse — slows every call
Commits Giant (3+ files), separate test from impl
Temperature >0.3 for code agents
Trust Agent self-reports — ALWAYS verify
Git git add -i, git rebase -i (no interactive input)
Git Skip hooks (--no-verify), force push without request
Bash sleep N — use conditional waits
Bash cd dir && cmd — use workdir parameter
Files Catch-all utils.ts/helpers.ts — name by purpose

AGENT MODELS

Agent Model Temp Purpose
Sisyphus anthropic/claude-opus-4-6 0.1 Primary orchestrator (fallback: kimi-k2.5 → glm-4.7 → gpt-5.3-codex → gemini-3-pro)
Hephaestus openai/gpt-5.3-codex 0.1 Autonomous deep worker (NO fallback)
Atlas anthropic/claude-sonnet-4-5 0.1 Master orchestrator (fallback: kimi-k2.5 → gpt-5.2)
Prometheus anthropic/claude-opus-4-6 0.1 Strategic planning (fallback: kimi-k2.5 → gpt-5.2)
oracle openai/gpt-5.2 0.1 Consultation, debugging (fallback: claude-opus-4-6)
librarian zai-coding-plan/glm-4.7 0.1 Docs, GitHub search (fallback: glm-4.7-free)
explore xai/grok-code-fast-1 0.1 Fast codebase grep (fallback: claude-haiku-4-5 → gpt-5-mini → gpt-5-nano)
multimodal-looker google/gemini-3-flash 0.1 PDF/image analysis
Metis anthropic/claude-opus-4-6 0.3 Pre-planning analysis (fallback: kimi-k2.5 → gpt-5.2)
Momus openai/gpt-5.2 0.1 Plan validation (fallback: claude-opus-4-6)
Sisyphus-Junior anthropic/claude-sonnet-4-5 0.1 Category-spawned executor

OPENCODE PLUGIN API

Plugin SDK from @opencode-ai/plugin. Plugin = async (PluginInput) => Hooks.

Hook Purpose
tool Register custom tools (Record<string, ToolDefinition>)
chat.message Intercept user messages (can modify parts)
chat.params Modify LLM parameters (temperature, topP, options)
tool.execute.before Pre-tool interception (can modify args)
tool.execute.after Post-tool processing (can modify output)
event Session lifecycle events (session.created, session.stop, etc.)
config Config modification (register agents, MCPs, commands)
experimental.chat.messages.transform Transform message history
experimental.session.compacting Session compaction customization

DEPENDENCIES

Package Purpose
@opencode-ai/plugin + sdk OpenCode integration SDK
@ast-grep/cli + napi AST pattern matching (search/replace)
@code-yeongyu/comment-checker AI comment detection/prevention
@modelcontextprotocol/sdk MCP client for remote HTTP servers
@clack/prompts Interactive CLI TUI
commander CLI argument parsing
zod (v4) Schema validation for config
jsonc-parser JSONC config with comments
picocolors Terminal colors
picomatch Glob pattern matching
vscode-jsonrpc LSP communication
js-yaml YAML parsing (tasks, skills)
detect-libc Platform binary selection

COMMANDS

bun run typecheck      # Type check
bun run build          # ESM + declarations + schema
bun run rebuild        # Clean + Build
bun test               # 176 test files
bun run build:schema   # Regenerate JSON schema

DEPLOYMENT

GitHub Actions workflow_dispatch ONLY

  1. Commit & push changes
  2. Trigger: gh workflow run publish -f bump=patch
  3. Never bun publish directly, never bump version locally

COMPLEXITY HOTSPOTS

File Lines Description
src/features/background-agent/manager.ts 1701 Task lifecycle, concurrency
src/hooks/anthropic-context-window-limit-recovery/ 2232 Multi-strategy context recovery
src/hooks/claude-code-hooks/ 2110 Claude Code settings.json compat
src/hooks/todo-continuation-enforcer/ 2061 Core boulder mechanism
src/hooks/atlas/ 1976 Session orchestration
src/hooks/ralph-loop/ 1687 Self-referential dev loop
src/hooks/keyword-detector/ 1665 Mode detection (ultrawork/search)
src/hooks/rules-injector/ 1604 Conditional rules injection
src/hooks/think-mode/ 1365 Model/variant switching
src/hooks/session-recovery/ 1279 Auto error recovery
src/features/builtin-skills/skills/git-master.ts 1112 Git master skill
src/tools/delegate-task/constants.ts 569 Category routing configs

MCP ARCHITECTURE

Three-tier system:

  1. Built-in (src/mcp/): websearch (Exa/Tavily), context7 (docs), grep_app (GitHub)
  2. Claude Code compat (features/claude-code-mcp-loader/): .mcp.json with ${VAR} expansion
  3. Skill-embedded (features/opencode-skill-loader/): YAML frontmatter in SKILL.md

CONFIG SYSTEM

  • Zod validation: 21 schema component files in src/config/schema/
  • JSONC support: Comments, trailing commas
  • Multi-level: Project (.opencode/) → User (~/.config/opencode/) → Defaults
  • Migration: Legacy config auto-migration in src/shared/migration/

NOTES

  • OpenCode: Requires >= 1.0.150
  • 1130 TypeScript files, 176 test files, 127k+ lines
  • Flaky tests: ralph-loop (CI timeout), session-state (parallel pollution)
  • Trusted deps: @ast-grep/cli, @ast-grep/napi, @code-yeongyu/comment-checker
  • No linter/formatter: No ESLint, Prettier, or Biome configured
  • License: SUL-1.0 (Sisyphus Use License)
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