docs: add module-level AGENTS.md for mcp-oauth, atlas, rules-injector, background-task, call-omo-agent, lsp

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+# src/hooks/atlas/ — Master Boulder Orchestrator
+
+**Generated:** 2026-02-19
+
+## OVERVIEW
+
+17 files (~1976 LOC). The `atlasHook` — Continuation Tier hook that monitors session.idle events and forces continuation when boulder sessions (ralph-loop, task-spawned agents) have incomplete work. Also enforces write/edit policies for subagent sessions.
+
+## WHAT ATLAS DOES
+
+Atlas is the "keeper of sessions" — it tracks every session and decides:
+1. Should this session be forced to continue? (if boulder session with incomplete todos)
+2. Should write/edit be blocked? (policy enforcement for certain session types)
+3. Should a verification reminder be injected? (after tool execution)
+
+## DECISION GATE (session.idle)
+
+```
+session.idle event
+  → Is this a boulder/ralph/atlas session? (session-last-agent.ts)
+  → Is there an abort signal? (is-abort-error.ts)
+  → Failure count < max? (state.promptFailureCount)
+  → No running background tasks?
+  → Agent matches expected? (recent-model-resolver.ts)
+  → Plan complete? (todo status)
+  → Cooldown passed? (5s between injections)
+  → Inject continuation prompt (boulder-continuation-injector.ts)
+```
+
+## KEY FILES
+
+| File | Purpose |
+|------|---------|
+| `atlas-hook.ts` | `createAtlasHook()` — composes event + tool handlers, maintains session state |
+| `event-handler.ts` | `createAtlasEventHandler()` — decision gate for session.idle events |
+| `boulder-continuation-injector.ts` | Build + inject continuation prompt into session |
+| `system-reminder-templates.ts` | Templates for continuation reminder messages |
+| `tool-execute-before.ts` | Block write/edit based on session policy |
+| `tool-execute-after.ts` | Inject verification reminders post-tool |
+| `write-edit-tool-policy.ts` | Policy: which sessions can write/edit? |
+| `verification-reminders.ts` | Reminder content for verifying work |
+| `session-last-agent.ts` | Determine which agent owns the session |
+| `recent-model-resolver.ts` | Resolve model used in recent messages |
+| `subagent-session-id.ts` | Detect if session is a subagent session |
+| `sisyphus-path.ts` | Resolve `.sisyphus/` directory path |
+| `is-abort-error.ts` | Detect abort signals in session output |
+| `types.ts` | `SessionState`, `AtlasHookOptions`, `AtlasContext` |
+
+## STATE PER SESSION
+
+```typescript
+interface SessionState {
+  promptFailureCount: number  // Increments on failed continuations
+  // Resets on successful continuation
+}
+```
+
+Max consecutive failures before 5min pause: 5 (exponential backoff in todo-continuation-enforcer).
+
+## RELATIONSHIP TO OTHER HOOKS
+
+- **atlasHook** (Continuation Tier): Master orchestrator, handles boulder sessions
+- **todoContinuationEnforcer** (Continuation Tier): "Boulder" mechanism for main Sisyphus sessions
+- Both inject into session.idle but serve different session types