oh-my-opencode/src/plugin/AGENTS.md

src/plugin/ — 10 OpenCode Hook Handlers + Hook Composition

Generated: 2026-05-14

OVERVIEW

Core glue layer. Files assemble the 10 OpenCode hook handlers and compose the 5-tier hook system into the PluginInterface. Each handler file maps to one OpenCode hook type.

HANDLER FILES

File	OpenCode Hook	Purpose
config.ts	config	6-phase config loading pipeline (delegates to plugin-handlers/)
tool-registry.ts	tool	20–39 tools assembled with config gates (team-mode +12, task system +4, hashline +1, interactive_bash +1, look_at +1)
chat-message.ts	chat.message	First-message variant resolution, session setup, keyword detection trigger
chat-params.ts	chat.params	Anthropic effort, think mode, runtime fallback model override
chat-headers.ts	chat.headers	Copilot x-initiator header injection
event.ts	event	Session lifecycle (created/deleted/idle/error/status), openclaw dispatch, runtime fallback
tool-execute-before.ts	tool.execute.before	Pre-tool guards
tool-execute-after.ts	tool.execute.after	Post-tool hooks (truncation, comment-checker, hashline read tagging, json-error-recovery)
messages-transform.ts	experimental.chat.messages.transform	Context injection, thinking-block validation, tool-pair validation, keyword detection
session-compacting.ts	experimental.session.compacting	Context + todo preservation across compaction
skill-context.ts	(helper)	Skill/browser/category context shared with tool creation

HOOK COMPOSITION (hooks/ subdir)

File	Tier	Count
create-session-hooks.ts	Session	24
create-tool-guard-hooks.ts	Tool Guard	16
create-transform-hooks.ts	Transform	5
create-skill-hooks.ts	Skill	2
create-core-hooks.ts	Aggregator	Session + Guard + Transform = 45

createContinuationHooks() (7) lives in src/create-hooks.ts next to createCoreHooks() and createSkillHooks().

SUPPORT FILES

File	Purpose
available-categories.ts	Build AvailableCategory[] for agent prompt injection
session-agent-resolver.ts	Resolve which agent owns a session
session-status-normalizer.ts	Normalize session status across OpenCode versions
recent-synthetic-idles.ts	Dedup rapid synthetic idle events
unstable-agent-babysitter.ts	Track unstable agent behavior across sessions
types.ts	PluginContext, PluginInterface, ToolsRecord, TmuxConfig
ultrawork-model-override.ts	Ultrawork mode model override logic
ultrawork-db-model-override.ts	DB-level model override for ultrawork
config-handler.ts	Runtime config loading and caching
normalize-tool-arg-schemas.ts	Coerce tool arg schemas into a normalized shape

TOOL REGISTRATION GATES

// src/plugin/tool-registry.ts
const taskToolsRecord = isTaskSystemEnabled(config) ? { task_create, task_get, task_list, task_update } : {}
const hashlineToolsRecord = config.hashline_edit ? { edit: createHashlineEditTool(ctx) } : {}
const teamModeToolsRecord = config.team_mode?.enabled ? { team_create, team_delete, team_shutdown_request, team_approve_shutdown, team_reject_shutdown, team_send_message, team_task_create, team_task_list, team_task_update, team_task_get, team_status, team_list } : {}
const lookAt = isMultimodalLookerEnabled ? { look_at: createLookAt(ctx) } : {}
const interactiveBashTool = interactiveBashEnabled ? { interactive_bash } : {}

const allTools = {
  ...builtinTools,                    // 6 LSP
  ...createGrepTools(ctx),
  ...createGlobTools(ctx),
  ...createAstGrepTools(ctx),
  ...createSessionManagerTools(ctx),
  ...backgroundTools,                 // 2 background_*
  call_omo_agent, task,
  ...lookAt,
  skill_mcp, skill,
  ...interactiveBashTool,
  ...teamModeToolsRecord,             // +12 conditional
  ...taskToolsRecord,                 // +4 conditional
  ...hashlineToolsRecord,             // +1 conditional
}

KEY PATTERNS

• Each handler exports a function receiving (hookRecord, ctx, pluginConfig, managers) → returns the OpenCode hook function.
• Handlers iterate over hook records, calling each hook with (input, output) in registration order.
• safeHook() wrapper isolates hook errors so one broken hook does not crash the chain.
• filterDisabledTools(allTools, disabled_tools) prunes tools listed in disabled_tools config.
• experimental.max_tools cap trims tool count when set (selects the highest-priority tools).