These modules have no source files anywhere in the npm package. They are internal Anthropic infrastructure.

| Module | Purpose | Feature Gate |

|--------|---------|-------------|

| `daemon/main.js` | Background daemon supervisor | `DAEMON` |

| `daemon/workerRegistry.js` | Daemon worker registry | `DAEMON` |

| `proactive/index.js` | Proactive notification system | `PROACTIVE` |

| `contextCollapse/index.js` | Context collapse service (experimental) | `CONTEXT_COLLAPSE` |

| `contextCollapse/operations.js` | Collapse operations | `CONTEXT_COLLAPSE` |

| `contextCollapse/persist.js` | Collapse persistence | `CONTEXT_COLLAPSE` |

| `skillSearch/featureCheck.js` | Remote skill feature check | `EXPERIMENTAL_SKILL_SEARCH` |

| `skillSearch/remoteSkillLoader.js` | Remote skill loader | `EXPERIMENTAL_SKILL_SEARCH` |

| `skillSearch/remoteSkillState.js` | Remote skill state | `EXPERIMENTAL_SKILL_SEARCH` |

| `skillSearch/telemetry.js` | Skill search telemetry | `EXPERIMENTAL_SKILL_SEARCH` |

| `skillSearch/localSearch.js` | Local skill search | `EXPERIMENTAL_SKILL_SEARCH` |

| `skillSearch/prefetch.js` | Skill prefetch | `EXPERIMENTAL_SKILL_SEARCH` |

| `coordinator/workerAgent.js` | Multi-agent coordinator worker | `COORDINATOR_MODE` |

| `bridge/peerSessions.js` | Bridge peer session management | `BRIDGE_MODE` |

| `assistant/index.js` | Kairos assistant mode | `KAIROS` |

| `assistant/AssistantSessionChooser.js` | Assistant session picker | `KAIROS` |

| `compact/reactiveCompact.js` | Reactive context compaction | `CACHED_MICROCOMPACT` |

| `compact/snipCompact.js` | Snip-based compaction | `HISTORY_SNIP` |

| `compact/snipProjection.js` | Snip projection | `HISTORY_SNIP` |

| `compact/cachedMCConfig.js` | Cached micro-compact config | `CACHED_MICROCOMPACT` |

| `sessionTranscript/sessionTranscript.js` | Session transcript service | `TRANSCRIPT_CLASSIFIER` |

| `commands/agents-platform/index.js` | Internal agents platform | `ant` (internal) |

| `commands/assistant/index.js` | Assistant command | `KAIROS` |

| `commands/buddy/index.js` | Buddy system notifications | `BUDDY` |

| `commands/fork/index.js` | Fork subagent command | `FORK_SUBAGENT` |

| `commands/peers/index.js` | Multi-peer commands | `BRIDGE_MODE` |

| `commands/proactive.js` | Proactive command | `PROACTIVE` |

| `commands/remoteControlServer/index.js` | Remote control server | `DAEMON` + `BRIDGE_MODE` |

| `commands/subscribe-pr.js` | GitHub PR subscription | `KAIROS_GITHUB_WEBHOOKS` |

| `commands/torch.js` | Internal debug tool | `TORCH` |

| `commands/workflows/index.js` | Workflow commands | `WORKFLOW_SCRIPTS` |

| `jobs/classifier.js` | Internal job classifier | `TEMPLATES` |

| `memdir/memoryShapeTelemetry.js` | Memory shape telemetry | `MEMORY_SHAPE_TELEMETRY` |

| `services/sessionTranscript/sessionTranscript.js` | Session transcript | `TRANSCRIPT_CLASSIFIER` |

| `tasks/LocalWorkflowTask/LocalWorkflowTask.js` | Local workflow task | `WORKFLOW_SCRIPTS` |

| `protectedNamespace.js` | Internal namespace guard | `ant` (internal) |

| `protectedNamespace.js` (envUtils) | Protected namespace runtime | `ant` (internal) |

| `coreTypes.generated.js` | Generated core types | `ant` (internal) |

| `devtools.js` | Internal dev tools | `ant` (internal) |

| `attributionHooks.js` | Internal attribution hooks | `COMMIT_ATTRIBUTION` |

| `systemThemeWatcher.js` | System theme watcher | `AUTO_THEME` |

| `udsClient.js` / `udsMessaging.js` | UDS messaging client | `UDS_INBOX` |

| `systemThemeWatcher.js` | Theme watcher | `AUTO_THEME` |

These tools have type signatures in `sdk-tools.d.ts` but their implementations were stripped at compile time.

| Tool | Purpose | Feature Gate |

|------|---------|-------------|

| `REPLTool` | Interactive REPL (VM sandbox) | `ant` (internal) |

| `SnipTool` | Context snipping | `HISTORY_SNIP` |

| `SleepTool` | Sleep/delay in agent loop | `PROACTIVE` / `KAIROS` |

| `MonitorTool` | MCP monitoring | `MONITOR_TOOL` |

| `OverflowTestTool` | Overflow testing | `OVERFLOW_TEST_TOOL` |

| `WorkflowTool` | Workflow execution | `WORKFLOW_SCRIPTS` |

| `WebBrowserTool` | Browser automation | `WEB_BROWSER_TOOL` |

| `TerminalCaptureTool` | Terminal capture | `TERMINAL_PANEL` |

| `TungstenTool` | Internal perf monitoring | `ant` (internal) |

| `VerifyPlanExecutionTool` | Plan verification | `CLAUDE_CODE_VERIFY_PLAN` |

| `SendUserFileTool` | Send files to users | `KAIROS` |

| `SubscribePRTool` | GitHub PR subscription | `KAIROS_GITHUB_WEBHOOKS` |

| `SuggestBackgroundPRTool` | Suggest background PRs | `KAIROS` |

| `PushNotificationTool` | Push notifications | `KAIROS` |

| `CtxInspectTool` | Context inspection | `CONTEXT_COLLAPSE` |

| `ListPeersTool` | List active peers | `UDS_INBOX` |

| `DiscoverSkillsTool` | Skill discovery | `EXPERIMENTAL_SKILL_SEARCH` |

These are internal prompt templates and documentation, never published.

| File | Purpose |

|------|---------|

| `yolo-classifier-prompts/auto_mode_system_prompt.txt` | Auto-mode system prompt for classifier |

| `yolo-classifier-prompts/permissions_anthropic.txt` | Anthropic-internal permission prompt |

| `yolo-classifier-prompts/permissions_external.txt` | External user permission prompt |

| `verify/SKILL.md` | Verification skill documentation |

| `verify/examples/cli.md` | CLI verification examples |

| `verify/examples/server.md` | Server verification examples |

```

Bun's `feature()` is a **compile-time intrinsic**:

- Returns `true` in Anthropic's internal build → code is kept in the bundle

- Returns `false` in the published build → code is dead-code-eliminated

- The 108 modules simply do not exist anywhere in the published artifact