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

src/plugin/ — 8 OpenCode Hook Handlers + Hook Composition

Generated: 2026-02-18

OVERVIEW

Core glue layer. 20 source files assembling the 8 OpenCode hook handlers and composing 44 hooks into the PluginInterface. Every handler file corresponds to one OpenCode hook type.

HANDLER FILES

File	OpenCode Hook	Purpose
chat-message.ts	chat.message	First-message variant, session setup, keyword detection
chat-params.ts	chat.params	Anthropic effort level, think mode
event.ts	event	Session lifecycle (created, deleted, idle, error)
tool-execute-before.ts	tool.execute.before	Pre-tool guards (file guard, label truncator, rules injector)
tool-execute-after.ts	tool.execute.after	Post-tool hooks (output truncation, comment checker, metadata)
messages-transform.ts	experimental.chat.messages.transform	Context injection, thinking block validation
tool-registry.ts	tool	26 tools assembled from factories
skill-context.ts	—	Skill/browser/category context for tool creation

HOOK COMPOSITION (hooks/ subdir)

File	Tier	Count
create-session-hooks.ts	Session	22
create-tool-guard-hooks.ts	Tool Guard	9
create-transform-hooks.ts	Transform	4
create-continuation-hooks.ts	Continuation	7
create-skill-hooks.ts	Skill	2
create-core-hooks.ts	Aggregator	Session + Guard + Transform = 35

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 idle events
unstable-agent-babysitter.ts	Track unstable agent behavior across sessions
types.ts	PluginContext, PluginInterface, ToolsRecord, TmuxConfig

KEY PATTERNS

• Each handler exports a function receiving (hookRecord, ctx, pluginConfig, managers) → returns OpenCode hook function
• Handlers iterate over hook records, calling each hook with (input, output) in sequence
• safeHook() wrapper in composition files catches errors per-hook without breaking the chain
• Tool registry uses filterDisabledTools() before returning