### Initial Setup Before Trust Establishment

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/06-extra-findings.md

Performs initial setup tasks before trust is fully established. This includes applying only safe environment variables and initializing a skeleton for telemetry without sending events.

```typescript
export async function init(argv) {
  applySafeEnvironmentVariables()    // Only whitelisted env vars applied
  initTelemetrySkeleton()            // Only registers sink, no events sent
  // Does not call attachAnalyticsSink()
}
```

--------------------------------

### Session Memory Update Prompt Example

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04g-prompt-management.md

An example of a default update prompt for session memory, instructing the agent to use ONLY the Edit tool to update the notes file and adhere to specific formatting constraints.

```typescript
Your ONLY task is to use the Edit tool to update the notes file, then stop.
Do not call any other tools.
... 
- NEVER modify, delete, or add section headers
- NEVER modify or delete the italic _section description_ lines
- ONLY update the actual content that appears BELOW ...
```

--------------------------------

### Initial Sandbox Runtime Configuration

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04e-sandbox-implementation.md

This code shows the initial setup for `convertToSandboxRuntimeConfig`, where permissions are extracted and default rules for file system access (write, read) are established. It includes built-in initial rules.

```typescript
export function convertToSandboxRuntimeConfig(
  settings: SettingsJson,
): SandboxRuntimeConfig {
  const permissions = settings.permissions || {}

  const allowedDomains: string[] = []
  const deniedDomains: string[] = []

  const allowWrite: string[] = ['.', getClaudeTempDir()]
  const denyWrite: string[] = []
  const denyRead: string[] = []
  const allowRead: string[] = []
```

--------------------------------

### Example Frustrated User Inputs

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/06b-negative-keyword-analysis.md

These keywords and phrases indicate immediate user feedback on product state, suggesting frustration or dissatisfaction with the current interaction.

```text
wtf
wth
this sucks
so frustrating
damn it
piece of shit
```

--------------------------------

### Session Memory File Setup with Strict Permissions

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04-agent-memory.md

Sets up the session memory directory and file with restrictive permissions (owner-only access) to treat session memory as sensitive local state.

```typescript
async function setupSessionMemoryFile(ctx) {
 const sessionMemoryDir = getSessionMemoryDir()
 await fs.mkdir(sessionMemoryDir, { mode: 0o700 }) // Directory: owner only can read/write/execute

 const memoryPath = getSessionMemoryPath()
 await writeFile(memoryPath, '', {
 mode: 0o600, // File: owner only can read/write
 flag: 'wx', // O_CREAT|O_EXCL: create only if file does not exist, prevent overwriting existing memory
 })
}
```

--------------------------------

### Feature Toggle System Example

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/11-hidden-features-and-easter-eggs.md

Illustrates the use of a feature toggle system, showing how specific capabilities are controlled at compile time. These toggles manage interaction, agent, memory, and platform extension features.

```javascript
feature("VOICE_MODE")
```

```javascript
feature("ULTRAPLAN")
```

```javascript
feature("BUDDY")
```

```javascript
feature("BRIDGE_MODE")
```

--------------------------------

### Beta Header Configuration

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/11-hidden-features-and-easter-eggs.md

Shows examples of beta headers listed in a constants file, indicating negotiated capabilities and their associated dates. These headers suggest that certain features have entered the engineering wiring stage, even if not publicly visible.

```typescript
context-1m-2025-08-07
```

```typescript
web-search-2025-03-05
```

```typescript
fast-mode-2026-02-01
```

```typescript
token-efficient-tools-2026-03-28
```

```typescript
advisor-tool-2026-03-01
```

```typescript
afk-mode-2026-01-31
```

```typescript
cli-internal-2026-02-09
```

--------------------------------

### Facet Extraction Prompt Example

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/06b-negative-keyword-analysis.md

Illustrates how specific phrases indicating user frustration are mapped to the 'frustrated' analysis dimension in prompt engineering.

```text
"this is broken", "I give up" → frustrated
```

--------------------------------

### Component Backbone Diagram

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/components/01-component-architecture-overview.md

Illustrates the hierarchical structure and dependencies between major components in the application, starting from the root App component down to services and hooks.

```text
App
 -> REPL / FullscreenLayout
 -> Messages
 | -> VirtualMessageList
 | -> MessageRow / Message / messages/*
 |
 -> PromptInput
 -> Footer / Suggestions / Notifications
 -> QuickOpen / Search / Tasks / Teams / Bridge / ModelPicker

Messages and PromptInput both depend downward on:
 -> AppState
 -> hooks
 -> services
```

--------------------------------

### Effective System Prompt Priority

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04g-prompt-management.md

The comment in `buildEffectiveSystemPrompt` outlines the priority order for system prompts, starting from overrides down to the default prompt, with `appendSystemPrompt` always added last.

```typescript
/**
 * 0. Override system prompt
 * 1. Coordinator system prompt
 * 2. Agent system prompt
 * 3. Custom system prompt
 * 4. Default system prompt
 * Plus appendSystemPrompt is always added at the end
 */
```

--------------------------------

### Get SetAppState and AppStateStore

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/components/05-function-level-core-walkthrough.md

Provides direct access to the store's setState function and the store itself, enabling separation of state writing and subscription logic.

```tsx
function useSetAppState() {
	return useAppStore().setState;
}

function useAppStateStore() {
	return useAppStore();
}

```

--------------------------------

### setup.ts Runtime Environment Initialization Pseudo-code

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/01-architecture-overview.md

This pseudo-code shows the structure of `setup.ts`, focusing on the runtime environment initialization steps.

```typescript
// src/setup.ts structure pseudo-code
export async function setup(argv, permissionContext) {
  setCwd(resolvedWorkingDir)         // Set working directory
  startHooksWatcher()                // Listen for hooks config changes
  initWorktreeSnapshot()             // tmux/worktree snapshot
  initSessionMemory()                // Initialize session memory system
  startTeamMemoryWatcher()           // Start team memory file watcher
}
```

--------------------------------

### launchRepl Function Signature

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/01-architecture-overview.md

This is the function signature for `launchRepl` in `src/replLauncher.tsx`, which is responsible for starting the Ink rendering loop for the REPL/TUI mode.

```typescript
// src/replLauncher.tsx
export async function launchRepl(
  root: Root,
  appProps: AppWrapperProps,
  replProps: REPLProps,
  renderAndRun: (root: Root, element: React.ReactNode) => Promise<void>
): Promise<void>
```

--------------------------------

### Get Deferred Tools Delta Attachment

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04-agent-memory.md

Re-declares external capabilities after compaction to ensure the model has its full skill set.

```typescript
getDeferredToolsDeltaAttachment
```

--------------------------------

### MCP Server Startup Logic

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/01-architecture-overview.md

This pseudo-code shows the structure of the startMcpServer function in src/entrypoints/mcp.ts. It initializes an McpServer, registers internal tools with MCP schemas, and connects using StdioServerTransport.

```typescript
// src/entrypoints/mcp.ts structure pseudo-code
async function startMcpServer() {
  const server = new McpServer({ name: 'claude-code', version })
  // Wrap internal Tools (FileEdit, FileRead, Bash...) as MCP tool schemas
  for (const tool of getInternalTools()) {
    server.registerTool(tool.name, tool.inputSchema, wrapToolAsMcpHandler(tool))
  }
  await server.connect(new StdioServerTransport())
}
```

--------------------------------

### Fetch and Build Main System Prompt

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04g-prompt-management.md

Fetches default system prompt, user context, and system context in parallel, then builds the effective system prompt. The final system prompt is attached to toolUseContext.renderedSystemPrompt for persistent reference.

```typescript
const [defaultSystemPrompt, userContext, systemContext] = await Promise.all([
  getSystemPrompt(...),
  getUserContext(),
  getSystemContext(),
])
const systemPrompt = buildEffectiveSystemPrompt({
  mainThreadAgentDefinition,
  toolUseContext,
  customSystemPrompt,
  defaultSystemPrompt,
  appendSystemPrompt
})
toolUseContext.renderedSystemPrompt = systemPrompt;
```

--------------------------------

### Get Session Memory Compact Config

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04-agent-memory.md

Retrieves the configuration for session memory compaction, including the minimum token retention.

```typescript
getSessionMemoryCompactConfig
```

--------------------------------

### Prompt Generation and Override Flow

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04g-prompt-management.md

Outlines the general flow of prompt generation before it's sent to the model. It shows how startup parameters, default prompts, and context injections are processed to build the effective system prompt.

```text
Startup parameters / mode / agent / mcp / settings
                |
                v
getSystemPrompt() generates default system prompt array
                |
                v
buildEffectiveSystemPrompt() handles priority overrides
                |
                +---- userContext
                |       - CLAUDE.md
                |       - currentDate
                |
                +---- systemContext
                        - git status
                        - cacheBreaker
                |
                v
Query / REPL / Compact / Subagent call API
```

--------------------------------

### Static Segment: Opening Identity

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04g-prompt-management.md

An example of a static segment, `getSimpleIntroSection`, which defines the agent's identity and includes important instructions.

```typescript
return `
You are an interactive agent that helps users ...

${CYBER_RISK_INSTRUCTION}
IMPORTANT: You must NEVER generate or guess URLs for the user unless ...
`
```

--------------------------------

### Skill Loading Process Flow

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04c-skills-implementation.md

Illustrates the sequence of operations for loading skills, from scanning directories to parsing metadata and creating command objects.

```text
User directory / Project directory /.claude/skills/<skill-name>/SKILL.md
        │
        ▼
getSkillDirCommands(cwd)           ← Scan all skill directories in parallel, results memoized
        │
        ▼
loadSkillsFromSkillsDir(basePath)  ← Read directory, filter SKILL.md files
        │
        ▼
parseFrontmatter(content)          ← Parse YAML metadata
parseSkillFrontmatterFields(fm)    ← Extract name/paths/model/effort/...
        │
        ▼
createSkillCommand(fields)         ← Instantiate as Command object, plug into command system
        │
        ▼  (User invokes /<skill-name> or model selects autonomously)
getPromptForCommand(args, ctx)
  ├── substituteArguments()        ← Expand CLI parameters
  ├── Expand ${CLAUDE_SKILL_DIR}   ← Built-in variable substitution
  └── executeShellCommandsInPrompt() ← Execute embedded Shell (trusted sources only)
        │
        ▼
Final Prompt returned to the model (with real-time system state)
```

--------------------------------

### Strip Reinjected Attachments

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04f-context-management.md

Removes attachments that will be re-added later in the process to prevent hallucinations during secondary summarization. Example includes skill_discovery attachments.

```typescript
// Remove attachments that will be fully compensated in the post-compact phase,
// preventing secondary summarization from causing hallucinations
export function stripReinjectedAttachments(messages: Message[]): Message[] {
 // e.g., remove skill_discovery and other attachments
}
```

--------------------------------

### Initialize Agent Memory from Snapshot

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04-agent-memory.md

Describes the straightforward process of initializing local agent memory by copying files from a snapshot. It includes writing the synced metadata file.

```text
Snapshot directory
 -> Copy all files except snapshot.json
 -> Write to local agent memory directory
 -> Save.snapshot-synced.json
```

--------------------------------

### Get Main Transcript Path

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04i-session-storage-resume.md

Retrieves the file path for the main transcript of the current session. It constructs the path using the session's project directory and session ID.

```typescript
export function getTranscriptPath(): string {
  const projectDir = getSessionProjectDir() ?? getProjectDir(getOriginalCwd())
  return join(projectDir, `${getSessionId()}.jsonl`)
}
```

--------------------------------

### Unified Execution Kernel Diagram

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/05-differentiators-and-comparison.md

Illustrates how various runtime modes (REPL, SDK, subagent, background agent, bridge/remote) all route through the central query.ts / QueryEngine.ts for tool, memory, and permission management.

```text
REPL (with UI) ──┐
headless/SDK ──┤
subagent (sub-task) ──┤──> query.ts / QueryEngine.ts ──> tool/memory/permission
background agent ──┤
bridge/remote ──┘
```

--------------------------------

### Agent Memory Prompt Generation Steps

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04-agent-memory.md

Outlines the internal steps taken by `loadAgentMemoryPrompt` to prepare the memory prompt, including generating scope notes, computing the memory directory, ensuring its existence, and building the final prompt.

```typescript
loadAgentMemoryPrompt()
 -> Generates scopeNote based on scope
 -> Computes memoryDir
 -> fire-and-forget ensureMemoryDirExists(memoryDir)
 -> buildMemoryPrompt({
 displayName: 'Persistent Agent Memory',
 memoryDir,
 extraGuidelines: [scopeNote,...possible additional environment rules]
 })
```

--------------------------------

### Logging Memory Directory Counts with Verified Metadata

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/06-extra-findings.md

Example of using the privacy-focused type alias for logging memory directory statistics, requiring explicit type assertion for metadata fields.

```typescript
logMemoryDirCounts(memoryDir, {
  content_length: t.byteCount,
  line_count:     t.lineCount,
  was_truncated:  t.wasLineTruncated,
  // The following fields require explicit as assertion -- this marks "I have verified this is not code or file paths"
  memory_type: memoryType as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS,
})
```

--------------------------------

### Get Agent Transcript Path

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04i-session-storage-resume.md

Retrieves the file path for a specific subagent's transcript. It handles different subdirectories based on the agent ID and ensures the correct file naming convention.

```typescript
export function getAgentTranscriptPath(agentId: AgentId): string {
  const projectDir = getSessionProjectDir() ?? getProjectDir(getOriginalCwd())
  const sessionId = getSessionId()
  const subdir = agentTranscriptSubdirs.get(agentId)
  const base = subdir
    ? join(projectDir, sessionId, 'subagents', subdir)
    : join(projectDir, sessionId, 'subagents')
  return join(base, `agent-${agentId}.jsonl`)
}
```

--------------------------------

### Prompt Management Layers

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04g-prompt-management.md

Illustrates the six layers involved in prompt management, from the default system prompt to specialized prompt families. This provides an overview of how prompts are constructed and managed.

```text
1. Default main system prompt
   src/constants/prompts.ts

2. Effective system prompt assembler
   src/utils/systemPrompt.ts
   - override
   - coordinator
   - agent
   - custom
   - append

3. Runtime context injection
   src/context.ts
   - CLAUDE.md
   - currentDate
   - git status
   - cache breaker

4. Startup additional instruction entry
   src/main.tsx
   - --system-prompt
   - --append-system-prompt
   - systemPromptFile / appendSystemPromptFile
   - proactive / chrome / teammate addendum

5. Prompt cache and invalidation management
   src/constants/systemPromptSections.ts
   - section cache
   - dynamic boundary
   - cache break

6. Specialized prompt family
   compact / session memory / extract memories / hooks / insights etc.
```

--------------------------------

### Spawn Teammate using Backend Registry

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/01-architecture-overview.md

Spawns a teammate process by looking up the appropriate backend implementation in a registry based on configuration.

```typescript
const BACKEND_REGISTRY: Record<string, TeammateBackend> = {
  'in-process': InProcessBackend,
  'tmux':       TmuxBackend,
  'iterm2':     ITerm2PaneBackend,
}

export function spawnTeammate(config: TeammateConfig): TeammateHandle {
  const Backend = BACKEND_REGISTRY[config.backendType]
  return new Backend(config).spawn()
}
```

--------------------------------

### CLI Entrypoint Routing Logic

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/01-architecture-overview.md

This pseudo-code illustrates the early routing logic in `cli.tsx`. It handles fast path commands like version checking or system prompt dumping before initiating the full application startup.

```typescript
// src/entrypoints/cli.tsx structure pseudo-code
async function main() {
  const argv = parseArgs(process.argv)

  // Fast path routing — if matched, execute and exit, don't enter main.tsx
  if (argv['--version']) {
    console.log(version); process.exit(0)
  }
  if (argv['--dump-system-prompt']) {
    await dumpSystemPrompt(); process.exit(0)
  }
  if (argv['remote-control']) {
    return runRemoteControl(argv)
  }
  if (argv['daemon'] || argv['bg'] || argv['runner']) {
    return runDaemonOrBackground(argv)
  }

  // Default: enter full main launcher
  await import('./main.tsx').then(m => m.main(argv))
}
```

--------------------------------

### Wrap Fetch with Custom Timeout

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04d-mcp-implementation.md

Wraps a fetch function to add a custom timeout mechanism using `setTimeout` instead of `AbortSignal.timeout()` to avoid a known memory leak in the Bun runtime. GET requests are not timed out.

```typescript
export function wrapFetchWithTimeout(baseFetch: FetchLike): FetchLike {
  return async (url: string | URL, init?: RequestInit) => {
    const method = (init?.method ?? 'GET').toUpperCase()

    // GET requests do not have a timeout — SSE is a long-lived GET, cannot be cut off by timeout
    if (method === 'GET') return baseFetch(url, init)

    // Uses setTimeout instead of AbortSignal.timeout()
    // Reason: AbortSignal.timeout() has a memory leak in Bun (~2.4KB per request lingering before GC)
    const controller = new AbortController()
    const timer = setTimeout(
      c => c.abort(new DOMException('The operation timed out.', 'TimeoutError')),
      MCP_REQUEST_TIMEOUT_MS,
      controller,
    )
    timer.unref?.()  // Does not prevent process exit

    try {
      const response = await baseFetch(url, { ...init, signal: controller.signal })
      clearTimeout(timer)
      return response
    } catch (error) {
      clearTimeout(timer)
      throw error
    }
  }
}
```

--------------------------------

### Build Memory Prompt with Truncated Entrypoint Content

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/01-architecture-overview.md

Constructs a memory prompt by reading, truncating, and formatting content from an entrypoint file.

```typescript
export const ENTRYPOINT_NAME    = 'MEMORY.md'
export const MAX_ENTRYPOINT_LINES = 200
export const MAX_ENTRYPOINT_BYTES = 25_000

export function buildMemoryPrompt(params: {
  displayName: string
  memoryDir:   string
  extraGuidelines?: string[]
}): string {
  const entrypoint = params.memoryDir + ENTRYPOINT_NAME
  const raw = fs.readFileSync(entrypoint, { encoding: 'utf-8' })  // Sync read
  const t   = truncateEntrypointContent(raw)                       // Hard truncation protection

  const lines = buildMemoryLines(params.displayName, params.memoryDir, ...)
  lines.push(`## ${ENTRYPOINT_NAME}`, '', t.content)
  return lines.join('
')
}
```

--------------------------------

### Initialize AppStateProvider with Store and Effects

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/components/05-function-level-core-walkthrough.md

The AppStateProvider lazily initializes the store, synchronizes settings changes, and mounts necessary context providers. It also handles potential permission mode corrections.

```tsx
function AppStateProvider({
	children,
	initialState,
}: Props) {
	const {
		toolPermissionContext,
		setToolPermissionContext,
	} = useToolPermissions();

	const onChangeAppState = useCallback((state: AppState) => {
		// ... implementation details ...
	}, []);

	const store = useMemo(() => {
		return createStore(
			initialState ?? getDefaultAppState(),
			onChangeAppState
		);
	}, [initialState, onChangeAppState]);

	useEffect(() => {
		if (
			toolPermissionContext.isBypassPermissionsModeAvailable &&
			remoteSettings.bypassPermissionsMode === false
		) {
			const prev = store.getState();
			const next = {
				...prev,
				toolPermissionContext: {
					...toolPermissionContext,
					isBypassPermissionsModeAvailable: false,
				},
			};
			store.setState(next, true);
		}
	}, [toolPermissionContext, remoteSettings.bypassPermissionsMode]);

	useSettingsChange(onSettingsChange => {
		const unsubscribe = onSettingsChange(settings => {
			store.setState(prev => ({
				...prev,
				settings: {
					...prev.settings,
					...settings,
				},
			}));
		});
		return unsubscribe;
	});

	return (
		<MailboxProvider>
			<VoiceProvider>
				<AppStoreContext.Provider value={store}>
					{children}
				</AppStoreContext.Provider>
			</VoiceProvider>
		</MailboxProvider>
	);
}

```

--------------------------------

### Get All Base Tools Function

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04b-tool-call-implementation.md

Retrieves the master list of all built-in tools available in the system. This list can include always-present tools, tools enabled by feature flags or environment variables, and tools exclusive to internal users.

```typescript
export function getAllBaseTools(): Tools {
  return [
    AgentTool,
    TaskOutputTool,
    BashTool,
    ...
    FileEditTool,
    WebFetchTool,
    ...(isEnvTruthy(process.env.ENABLE_LSP_TOOL) ? [LSPTool] : []),
    ...(isWorktreeModeEnabled() ? [EnterWorktreeTool, ExitWorktreeTool] : []),
    ...(isToolSearchEnabledOptimistic() ? [ToolSearchTool] : []),
  ]
}
```

--------------------------------

### Pseudocode for Prompt Override Logic

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04g-prompt-management.md

Illustrates the decision tree for constructing the final system prompt based on various override and append conditions.

```text
if overrideSystemPrompt:
    final = [overrideSystemPrompt]
else if coordinator mode:
    final = [coordinatorPrompt] + [appendPrompt?]
else:
    base =
      agentPrompt
      or customSystemPrompt
      or defaultSystemPrompt

    if proactive mode and agentPrompt exists:
        final = defaultSystemPrompt + ["# Custom Agent Instructions" + agentPrompt]
    else:
        final = [base]

    if appendSystemPrompt:
        final += [appendSystemPrompt]
```

--------------------------------

### Registering Buddy Command Implementation

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/11-hidden-features-and-easter-eggs.md

This line in 'commands.ts' registers the implementation file for the './commands/buddy/index.js'. It shows how commands are mapped.

```typescript
commands.ts:118
registerCommand('./commands/buddy/index.js');
```

--------------------------------

### Load Conversation for Resume Pseudocode

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04i-session-storage-resume.md

This pseudocode outlines the main steps involved in loading a conversation for resume. It covers resolving the source, loading the full log if necessary, handling session IDs, copying file history, checking consistency, restoring skill state, deserializing messages, and processing session start hooks.

```typescript
async function loadConversationForResume(source) {
  log = resolveSourceToLogOrJsonl(source)

  if (log is lite log) {
    log = loadFullLog(log)
  }

  sessionId = resolveSessionId(log)
  copyPlanForResume(log, sessionId)
  copyFileHistoryForResume(log)

  messages = log.messages
  checkResumeConsistency(messages)

  restoreSkillStateFromMessages(messages)

  deserialized = deserializeMessagesWithInterruptDetection(messages)
  messages = deserialized.messages

  hookMessages = processSessionStartHooks('resume', { sessionId })
  messages.push(...hookMessages)

  return {
    messages,
    turnInterruptionState,
    fileHistorySnapshots,
    attributionSnapshots,
    contentReplacements,
    contextCollapseCommits,
    session metadata...
  }
}
```

--------------------------------

### Main Application Initialization Flow

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/06-extra-findings.md

Outlines the sequence of initialization steps in the main application entry point. It ensures that sensitive operations like telemetry are only initialized after trust boundaries have been established.

```typescript
export async function main(argv) {
  await init(argv)   // ① Before trust: only safe env vars applied, no telemetry events sent

  // ... establish trust (user confirmation, check config file includes) ...

  await initializeTelemetryAfterTrust()  // ② After trust: full env vars and telemetry allowed
}
```

--------------------------------

### Path Semantics for Sandbox Filesystem Settings

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04e-sandbox-implementation.md

Comments from the source code detailing the standard path semantics used for `sandbox.filesystem.*` settings. These include absolute paths, home directory expansion, and paths relative to the settings file directory.

```typescript
 * Unlike permission rules (Edit/Read), these settings use standard path semantics:
 * - `/path` → absolute path
 * - `~/path` → expanded to home directory
 * - `./path` or `path` → relative to settings file directory
```

--------------------------------

### QueryEngine Structure for SDK Mode

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/01-architecture-overview.md

This pseudo-code illustrates the structure of the QueryEngine class, used for UI-less execution in SDK mode. It manages multi-turn session state and interacts with the Claude API.

```typescript
// src/QueryEngine.ts structure pseudo-code
export class QueryEngine {
  async query(userInput: string): AsyncGenerator<StreamEvent> {
    // 1. Assemble messages + system prompt
    // 2. Call claude.ts API
    // 3. Handle tool_use / tool_result
    // 4. yield events to caller
  }
}
```

--------------------------------

### init.ts Logic Initialization Pseudo-code

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/01-architecture-overview.md

This pseudo-code outlines the structure of `init.ts`, detailing the logic initialization steps performed before trust is established.

```typescript
// src/entrypoints/init.ts structure pseudo-code
export async function init(argv) {
  applySafeEnvironmentVariables()    // Only apply safe env vars (pre-trust)
  initializeCertificates()           // Certificates and HTTPS proxy
  initializeHttpAgent()              // HTTP agent configuration
  initTelemetrySkeleton()            // Register telemetry sink, but don't emit events
  // Note: initializeTelemetryAfterTrust() is called by main.tsx after trust is established
}

export async function initializeTelemetryAfterTrust() {
  applyFullEnvironmentVariables()    // Apply all env vars only after trust passes
  attachAnalyticsSink()              // Start processing telemetry event queue
}
```

--------------------------------

### Main System Prompt Structure

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04g-prompt-management.md

This code illustrates the assembly of the main system prompt, combining static sections with dynamic ones, separated by a boundary marker. The `filter` ensures that null sections are removed.

```typescript
return [
  getSimpleIntroSection(outputStyleConfig),
  getSimpleSystemSection(),
  outputStyleConfig === null ||
  outputStyleConfig.keepCodingInstructions === true
    ? getSimpleDoingTasksSection()
    : null,
  getActionsSection(),
  getUsingYourToolsSection(enabledTools),
  getSimpleToneAndStyleSection(),
  getOutputEfficiencySection(),
  ...(shouldUseGlobalCacheScope() ? [SYSTEM_PROMPT_DYNAMIC_BOUNDARY] : []),
  ...resolvedDynamicSections,
].filter(s => s !== null)
```

--------------------------------

### Sandbox Runtime Configuration Logic

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/02-security-analysis.md

This pseudo-code outlines the logic for converting user-defined permissions into a sandbox runtime configuration. It specifies allowed and denied paths for file system access and allowed/denied network domains.

```typescript
// sandbox-adapter.ts core conversion logic (pseudo-code)
function convertToSandboxRuntimeConfig(permissions) {
  return {
    filesystem: {
      allowWrite: [...paths explicitly allowed by user for writing],
      denyWrite:  [...system core paths, e.g. ~/.claude/settings.json],
      allowRead:  [...paths explicitly allowed by user for reading],
      denyRead:   [...sensitive config paths]
    },
    network: {
      allowedDomains:  [...allowed domains extracted from WebFetchTool rules],
      deniedDomains:   [...denied domains],
      allowManagedOnly: [...enterprise managed mode — only managed domains allowed]
    }
  }
}
```

--------------------------------

### Agent Runtime Components

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04-agent-memory.md

Illustrates the components that constitute an agent's runtime, emphasizing the integration of memory.

```text
agent runtime
 = agent definition
 + system prompt
 + tool set
 + permission context
 + memory directory
 + snapshot state
```

--------------------------------

### Buddy Notification Teaser Window

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/11-hidden-features-and-easter-eggs.md

A rainbow-colored /buddy prompt appears on startup during a specific teaser window if the user hasn't hatched a companion yet. This snippet indicates the condition for displaying the prompt.

```typescript
if (localDate >= APRIL_1_2026 && localDate <= APRIL_7_2026 && !hasHatchedCompanion) {
  showBuddyNotification();
}
```

--------------------------------

### Discover Skills from Directories

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04c-skills-implementation.md

Discovers and loads skills from local directories, bundled sources, and MCP server. It handles parallel loading and deduplication to prevent duplicate skill entries.

```typescript
export const getSkillDirCommands = memoize(
  async (cwd: string): Promise<Command[]> => {
    const userSkillsDir    = join(getClaudeConfigHomeDir(), 'skills')  // ~/.claude/skills
    const managedSkillsDir = join(getManagedFilePath(), '.claude', 'skills')  // Policy-managed directory
    const projectSkillsDirs = getProjectDirsUpToHome('skills', cwd)   // Crawl up from project directory

    // --bare mode: skip auto-discovery, only load paths explicitly specified with --add-dir
    if (isBareMode()) {
      return additionalDirs.flatMap(dir =>
        loadSkillsFromSkillsDir(join(dir, '.claude', 'skills'), 'projectSettings')
      )
    }

    // Normal mode: load all sources in parallel
    const [managedSkills, userSkills, projectSkillsNested, additionalSkillsNested, legacyCommands] = 
      await Promise.all([
        loadSkillsFromSkillsDir(managedSkillsDir, 'policySettings'),    // Policy-level skills
        loadSkillsFromSkillsDir(userSkillsDir,    'userSettings'),      // User-level skills
        Promise.all(projectSkillsDirs.map(dir =>
          loadSkillsFromSkillsDir(dir, 'projectSettings'))),            // Project-level skills (multi-directory)
        Promise.all(additionalDirs.map(dir =>
          loadSkillsFromSkillsDir(join(dir, '.claude', 'skills'), 'projectSettings'))), // --add-dir
        loadSkillsFromCommandsDir(cwd),                                 // Legacy /commands/ directory
      ])

    // Merge + deduplicate (inode level, prevent symlink duplicates)
    return deduplicateByRealpath([
      ...managedSkills, ...userSkills,
      ...projectSkillsNested.flat(),
      ...additionalSkillsNested.flat(),
      ...legacyCommands,
    ])
  }
)
```

--------------------------------

### Parent to Child Context Propagation (Pseudocode)

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/06-extra-findings.md

Illustrates how a child agent inherits a snapshot of the parent's context, including restricted tool permissions and an independent abort controller. This is a value copy, not a reference.

```typescript
// src/tools/AgentTool/runAgent.ts (pseudocode)
export async function runAgent(config: AgentConfig): Promise<void> {
  // 1. Child agent inherits parent context snapshot (value copy, not reference)
  const childContext = deepCopy(config.parentContext, {
    // Child agent has independent abort controller (parent abort cascades to child)
    abortController: new AbortController(),
    // Child agent permissions are a subset of parent permissions (cannot escalate)
    toolPermissionContext: restrictToSubset(config.parentContext.toolPermissionContext),
  })

  await query(config.messages, config.systemPrompt, childContext, ...)
}
```

--------------------------------

### Main Flow of main.tsx (Pseudo-code)

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/01-architecture-overview.md

This pseudo-code illustrates the main execution flow within `main.tsx`, covering initialization, conditional branching for different modes, and entering the REPL.

```typescript
// src/main.tsx main flow (pseudo-code)
export async function main(argv: ParsedArgs) {
  // 1. Early initialization (doesn't depend on trust)
  await init(argv)

  // 2. Parse CLI args -> determine permission mode, model, tools, etc.
  const permissionMode = initialPermissionModeFromCLI(argv)
  const model = resolveModel(argv)

  // 3. Conditional branches: select execution path
  if (argv['--print'] || argv['--sdk']) {
    return runHeadless(argv, model, permissionMode)
  }
  if (argv['bridge']) {
    return runBridge(argv)
  }
  if (argv['remote']) {
    return runRemote(argv)
  }

  // 4. Default path: initialize full runtime then enter REPL
  const bootstrap = await fetchBootstrapData()          // Fetch remote config
  const mcpTools  = await getMcpToolsCommandsAndResources() // Connect MCP
  const tools     = getTools(permissionContext)          // Assemble tool pool
  const skills    = initBundledSkills()                  // Load built-in skills
  const agents    = getAgentDefinitionsWithOverrides()   // Load agent definitions

  await initializeTelemetryAfterTrust()                 // Start telemetry only after trust

  settingsChangeDetector.start()                        // Listen for config hot-reload

  // 5. Enter REPL
  await launchRepl(root, appProps, replProps, renderAndRun)
}
```

--------------------------------

### Define NO_TOOLS_PREAMBLE for Compact Prompt

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04g-prompt-management.md

Defines a preamble for the compact prompt that enforces strict constraints: respond with TEXT ONLY, do NOT call any tools, and structure the response with <analysis> and <summary> blocks.

```typescript
const NO_TOOLS_PREAMBLE = `CRITICAL: Respond with TEXT ONLY. Do NOT call any tools.

- Do NOT use Read, Bash, Grep, Glob, Edit, Write, or ANY other tool.
- You already have all the context you need in the conversation above.
- Tool calls will be REJECTED and will waste your only turn — you will fail the task.
- Your entire response must be plain text: an <analysis> block followed by a <summary> block.
`
```

--------------------------------

### Buddy Face String Construction (TypeScript)

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/11-hidden-features-and-easter-eggs.md

Illustrates how different buddy species have unique single-line face designs for narrow terminal displays. These strings use placeholders for eye characters.

```typescript
duck / goose is (${eye}>
```

```typescript
cat is =${eye}ω${eye}=
```

```typescript
dragon is <${eye}~${eye}>
```

```typescript
octopus is ~(${eye}${eye})~
```

```typescript
axolotl is }${eye}.${eye}{
```

```typescript
robot is [${eye}${eye}]
```

--------------------------------

### TypeScript Function for Building System Prompt

Source: https://github.com/alankatanoisi/claude-code-english-analysis/blob/main/analysis/04g-prompt-management.md

The actual implementation of the prompt building logic in TypeScript, handling overrides, coordinator mode, proactive mode, and appends.

```typescript
export function buildEffectiveSystemPrompt({
  mainThreadAgentDefinition,
  toolUseContext,
  customSystemPrompt,
  defaultSystemPrompt,
  appendSystemPrompt,
  overrideSystemPrompt,
}): SystemPrompt {
  if (overrideSystemPrompt) {
    return asSystemPrompt([overrideSystemPrompt])
  }

  if (feature('COORDINATOR_MODE') &&
      isEnvTruthy(process.env.CLAUDE_CODE_COORDINATOR_MODE) &&
      !mainThreadAgentDefinition) {
    return asSystemPrompt([
      getCoordinatorSystemPrompt(),
      ...(appendSystemPrompt ? [appendSystemPrompt] : []),
    ])
  }

  const agentSystemPrompt = mainThreadAgentDefinition
    ? mainThreadAgentDefinition.getSystemPrompt(...)
    : undefined

  if (agentSystemPrompt && proactiveActive) {
    return asSystemPrompt([
      ...defaultSystemPrompt,
      `
# Custom Agent Instructions
${agentSystemPrompt}`,
      ...(appendSystemPrompt ? [appendSystemPrompt] : []),
    ])
  }

  return asSystemPrompt([
    ...(agentSystemPrompt
      ? [agentSystemPrompt]
      : customSystemPrompt
        ? [customSystemPrompt]
        : defaultSystemPrompt),
    ...(appendSystemPrompt ? [appendSystemPrompt] : []),
  ])
}
```