# Ralph Progress Log
Started: 2025-01-07
Feature: High Priority Improvements & Missing Features
## Codebase Patterns
- TypeScript project with ES modules ("type": "module")
- Logger: Use createLogger() from src/server/logger.ts, NOT console.*
- Types: Define in src/types/, use Zod for validation
- Error handling: Use type guards, preserve stack traces
- Skills: Register in src/skills/index.ts
- Tools: Register in src/tools/index-compat.ts
- Tests: Jest with experimental VM modules, place in src/__tests__/
- Build: tsc compiles to dist/
## Error Handling Pattern
```typescript
} catch (error: unknown) {
const message = error instanceof Error ? error.message : String(error);
const stack = error instanceof Error ? error.stack : undefined;
// Use message and stack
}
```
## Logger Usage Pattern
```typescript
import { createLogger } from './server/logger.js';
const logger = createLogger('ModuleName');
logger.info('message', { context });
logger.error('message', { error: message, stack });
```
## Key Files for Improvements
- src/server/logger.ts - Winston logger factory
- src/utils/type-guards.ts - Error type guards
- src/utils/retry.ts - Has CircuitBreaker class
- src/utils/error-handler.ts - Error handling patterns
- src/jamf-client-hybrid.ts - Main Jamf API client
- src/jamf-client-hybrid-fixed.ts - Duplicate client (to consolidate)
- src/server/health-check.ts - Health endpoint
- src/tools/tool-implementations.ts - Tool parameter validation needed
## Commands
- npm run typecheck - Type checking
- npm test - Run all tests
- npm run build:quick - Quick build
- npm run lint - ESLint
## Previous Session Learnings
- ESM mocking: jest.unstable_mockModule MUST be called before importing module
- Use `const { Class } = await import('./module.js')` after mocking
- Mock JamfApiClientHybrid with config.baseUrl and all API methods
- Use beforeEach/afterEach to reset process.argv and process.env
- Generated output directories should be in .gitignore
- Use conventional commit prefixes: feat, fix, docs, chore, test
---
## 2026-01-12 - IMP-001
- Removed all console.log/error/warn calls from src/
- Created CLI output utilities for proper CLI user output:
- src/cli/output.ts - print(), printError(), printWarn()
- src/agent/output.ts - same utilities for agent CLI
- Updated 21 source files to use logger or CLI output utilities
- **Learnings:**
- CLI tools should use process.stdout.write/stderr.write wrappers, not console.*
- Use `error: unknown` in catch blocks, then type guard with `error instanceof Error`
- MCP servers must never output to stdout/stderr - it breaks JSON-RPC parsing
- The SkillsManager tests have stale expectations - they reference non-existent skills
---
## 2026-01-12 - IMP-002
- Fixed all `catch (error: any)` patterns in src/ (28 occurrences)
- Changed to `catch (error: unknown)` with type guard pattern
- Files changed:
- src/skills/http-initializer.ts
- src/skills/manager.ts
- src/skills/context-provider.ts
- src/tools/skills-mcp-integration.ts (2 catch blocks)
- src/tools/skills-integration.ts
- src/tools/skills-tools.ts
- src/skills/device-management/batch-inventory-update.ts (3 catch blocks)
- src/skills/device-management/find-outdated-devices.ts
- src/skills/device-management/device-search-optimized.ts (2 catch blocks)
- src/skills/device-management/device-search.ts
- src/skills/policy-management/deploy-policy-by-criteria.ts
- src/skills/automation/scheduled-compliance-check.ts
- src/tools/tool-implementations.ts
- src/jamf-client-hybrid-fixed.ts
- src/server/skills-endpoints.ts (4 catch blocks)
- src/server/http-server.ts
- src/agent/ai/providers/BedrockProvider.ts
- src/agent/ai/providers/OpenAIProvider.ts
- src/agent/core/TaskExecutor.ts (2 catch blocks)
- src/agent/core/AgentCore.ts
- **Learnings:**
- For AWS/Axios errors, cast to typed object to access properties like `.name` or `.response`
- Example: `const errorName = (error as { name?: string }).name;`
- When returning error in SkillResult, create Error object: `error instanceof Error ? error : new Error(message)`
- Pre-existing test failures in SkillsManager tests are unrelated to error handling
---
## 2026-01-12 - IMP-003
- Fixed `as any` casts in src/skills/ and src/tools/
- Key changes:
- Added eslint-disable comments for intentional any types in skills/types.ts
- Added ToolCallResult type alias for flexible tool return shapes
- SkillsManager now has public context setter (was private, needed cast)
- JamfApiClientHybrid now has public readOnlyMode getter (was private)
- Added proper ComplianceDeviceInfo interface to index-compat.ts
- Added ExecutionResult interface to tool-implementations.ts
- Files changed:
- src/skills/types.ts (added eslint-disable, ToolCallResult type)
- src/skills/manager.ts (public context setter, executeSkill params)
- src/skills/context-provider.ts (type annotations with eslint-disable)
- src/skills/http-initializer.ts (removed `as any` cast)
- src/skills/automation/scheduled-compliance-check.ts (type imports)
- src/jamf-client-hybrid.ts (readOnlyMode getter, renamed private _readOnlyMode)
- src/tools/skills-integration.ts (JamfApiClientHybrid type, eslint-disable)
- src/tools/skills-mcp-integration.ts (type annotations, eslint-disable)
- src/tools/skills-tools.ts (eslint-disable for handleToolCall)
- src/tools/tool-implementations.ts (interface exports, readOnlyMode via getter)
- src/tools/index-compat.ts (ComplianceDeviceInfo interface)
- **Learnings:**
- Use `// eslint-disable-next-line @typescript-eslint/no-explicit-any` for intentional any
- For flexible return types from tools, use type aliases rather than inline any
- Private properties can be exposed via getters without breaking existing code
- Internal Server __handlers property needs `as any` - no public API for handler access
- Pre-existing test failures in SkillsManager tests (expect device-search-optimized, getChatGPTSchema)
---
## 2026-01-12 - IMP-004
- Added Zod validation schemas for all tool parameters
- Created src/tools/validation-schemas.ts with:
- ToolValidationError class for structured error messages
- ID validators: JamfDeviceIdSchema, JamfPolicyIdSchema, JamfScriptIdSchema, JamfProfileIdSchema, JamfGroupIdSchema
- Numeric validators: ComplianceDaysSchema (1-365), LimitSchema (1-1000)
- Search validators: SearchQuerySchema (max 500 chars)
- Complete tool parameter schemas with proper types
- Updated src/tools/tool-implementations.ts:
- All tool functions now validate params via validateParams()
- Removed `any` types - now using `unknown` with validation
- Added proper interface types for API responses (PolicyGeneral, PolicyScript, etc.)
- Re-exported validation types and ToolValidationError for external use
- **Learnings:**
- Zod .default() on optional fields still infers `T | undefined` - use nullish coalescing at usage site
- JamfPolicy has index signature `[key: string]: unknown`, so `general` must be cast to access properties
- JamfScope uses `computer_ids` and `computer_group_ids` (not `computers` and `computer_groups`)
- Validation schemas should be in a separate file for reusability across the codebase
---
## 2026-01-12 - IMP-005
- Added structured error handling with full context
- Created in src/utils/error-handler.ts:
- ErrorContext interface for capturing error details
- StructuredErrorResponse interface with user-friendly and technical messages
- buildErrorContext() to create structured error objects from unknown errors
- createStructuredErrorResponse() for user-friendly error responses
- logErrorWithContext() for consistent error logging
- captureStackTrace() and combineStacks() for stack trace preservation
- Updated catch blocks in 13 files:
- src/tools/index-compat.ts, skills-integration.ts, skills-mcp-integration.ts, skills-tools.ts
- src/skills/manager.ts, context-provider.ts, http-initializer.ts
- src/skills/device-management/*.ts, policy-management/*.ts, automation/*.ts
- Error responses now include: message, code, timestamp, suggestions, stack trace
- **Learnings:**
- TypeScript spread operator requires object types - use `(obj || {})` for optional spreads
- After `instanceof` check on `unknown`, still need type assertion to access properties
- Import RateLimitError from errors.ts when using it for instanceof checks
- Pre-existing test failures in SkillsManager tests are unrelated to error handling changes
---
## 2026-01-12 - IMP-006
- Added token refresh mechanism to Jamf client
- Enhanced JamfAuthToken interface with metadata:
- issuedAt: Date when token was obtained
- expiresIn: Token lifetime in seconds from server
- Added TOKEN_REFRESH_BUFFER_MS constant (5 minutes) for proactive refresh
- Added isTokenExpiredOrExpiring() helper to check if token needs refresh
- Updated ensureAuthenticated() to refresh tokens before they expire
- Added response interceptor for automatic 401 retry:
- Invalidates current tokens
- Re-authenticates and updates headers
- Retries original request with fresh token
- Uses _retry flag to prevent infinite loops
- Added getTokenStatus() public method for health checks
- Added updateAuthorizationHeader() helper (extracted for TypeScript control flow)
- Files changed:
- src/jamf-client-hybrid.ts
- **Learnings:**
- TypeScript control flow analysis infers `never` after assigning `null` in closures
- Extract token access to separate methods to avoid control flow issues
- Use explicit type annotations when TypeScript inference fails in async closures
- Pre-existing test failures in SkillsManager tests continue to be unrelated
---
## 2026-01-12 - IMP-007
- Consolidated duplicate Jamf client implementations
- Analysis:
- jamf-client-hybrid.ts (3270 lines): Full-featured, used by 12+ files, has token refresh, HTTP pooling
- jamf-client-hybrid-fixed.ts (410 lines): Simpler, older, NOT imported anywhere
- Decision: Keep jamf-client-hybrid.ts (better), delete jamf-client-hybrid-fixed.ts
- Changes:
- Deleted src/jamf-client-hybrid-fixed.ts (unused, redundant)
- Updated prd.json notes to reference correct file name
- No unique functionality needed to merge (fixed.ts had subset of features)
- **Learnings:**
- Always check import usage before removing files (`grep -r "from.*filename"`)
- The "fixed" version was likely an earlier iteration that was superseded
- Pre-existing test failures in SkillsManager tests continue to be unrelated
---
---
## 2026-01-12 - IMP-008
- Added comprehensive environment variable validation with Zod schemas
- Created src/utils/env-validation.ts with:
- EnvValidationError class for structured error messages with suggestions
- JamfConfigSchema: JAMF_URL, auth credentials, read-only mode, TLS settings
- EnhancedModeSchema: retry, rate limiting, circuit breaker settings with bounds
- HttpServerSchema: PORT (1-65535), RATE_LIMIT_WINDOW, RATE_LIMIT_MAX
- OAuthProviderSchema: provider type, Auth0/Okta configs
- HttpAgentPoolSchema: connection pool settings with bounds
- LoggingSchema, AgentConfigSchema, ExternalApiKeysSchema
- validateEnvironment() to validate all config at once
- Updated src/index.ts: uses validateJamfConfig() for type-safe config
- Updated src/index-enhanced.ts: uses both Jamf and enhanced mode validation
- Updated src/server/http-server.ts: validates HTTP server config with warnings
- All validated values use proper types instead of raw process.env strings
- Files changed:
- src/utils/env-validation.ts (new, 423 lines)
- src/index.ts
- src/index-enhanced.ts
- src/server/http-server.ts
- **Learnings:**
- Zod transform() is ideal for string-to-type coercion (e.g., 'true' -> boolean)
- Use .pipe() after transform() to apply additional validation to transformed value
- MCP entry points (index-main.ts) can't log to stdout - validate in actual servers
- Pre-existing test failures in SkillsManager tests continue to be unrelated
---
## 2026-01-12 - IMP-009
- Added circuit breaker for Jamf API calls
- Used existing CircuitBreaker class from src/utils/retry.ts
- Extended JamfApiClientConfig with circuit breaker options:
- enabled, failureThreshold, resetTimeout, halfOpenRequests
- Added environment variable validation for circuit breaker:
- JAMF_CIRCUIT_BREAKER_THRESHOLD (1-20)
- JAMF_CIRCUIT_BREAKER_RESET_TIMEOUT (5000-300000ms)
- JAMF_CIRCUIT_BREAKER_HALF_OPEN_REQUESTS (1-10)
- Added protected HTTP methods for circuit-breaker-wrapped requests
- Added getCircuitBreakerStatus() for health check integration
- Updated health-check.ts with checkCircuitBreaker() function
- Updated readinessProbe to fail if circuit breaker is OPEN
- Files changed:
- src/utils/env-validation.ts
- src/jamf-client-hybrid.ts
- src/server/health-check.ts
- **Learnings:**
- CircuitBreaker.execute() pattern works well with async functions
- Health checks should treat OPEN circuit as 'fail' since API is unavailable
- Half-open state should be 'warn' to indicate recovery in progress
- Pre-existing test failures in SkillsManager tests continue to be unrelated
---
## 2026-01-12 - IMP-010
- Added granular health check with component breakdown
- Created new interfaces:
- ComponentHealthStatus for granular health response
- ComponentStatus for individual component status
- Added SkillsManager.getStatus() method:
- Returns initialized, skillCount, registeredSkills, contextAvailable
- Added new health check functions:
- checkAuthentication(): Checks token status, expiration, credentials
- checkSkillsManager(): Checks skill registration and initialization
- checkCache(): Checks connection pool status as cache
- convertStatus(): Helper to convert pass/fail/warn to healthy/degraded/unhealthy
- Added componentHealthCheck() endpoint:
- Returns status for 4 components: jamfApi, auth, skills, cache
- Includes summary with counts (total, healthy, degraded, unhealthy)
- Calculates overall status from component statuses
- Files changed:
- src/server/health-check.ts
- src/skills/manager.ts
- **Learnings:**
- Health check components should map to distinct functional areas
- Token expiration check uses 5-minute buffer for "expiring soon" warning
- Connection pool doubles as connection cache status
- Pre-existing test failures in SkillsManager tests continue to be unrelated
---
## 2026-01-12 - IMP-011
- Created comprehensive architecture documentation
- Created docs/ARCHITECTURE.md with:
- ASCII component diagrams showing MCP server, tools, skills, resources layers
- Data flow diagrams for standard mode (stdio) and HTTP mode
- Hybrid client architecture explanation (why both OAuth2 and Basic Auth)
- Skills execution flow from AI request to Jamf API
- Tool/skill/resource/prompt registration flow
- Health check system with component breakdown
- Configuration reference (environment variables)
- Extension points for adding new tools/skills/resources
- Files changed:
- docs/ARCHITECTURE.md (new, 446 lines)
- **Learnings:**
- Documentation-only changes don't require typecheck/test pass (but verified anyway)
- ASCII diagrams work well in markdown for showing component relationships
- Pre-existing test failures in SkillsManager tests continue to be unrelated
---
## 2026-01-12 - IMP-012
- Added comprehensive test suite for retry and circuit breaker utilities
- Created src/__tests__/utils/retry.test.ts with 32 tests:
- getRetryConfig: default values and environment variable override
- CircuitBreaker state transitions:
- CLOSED state with success/failure tracking
- Transition to OPEN after reaching failure threshold
- JamfAPIError with CIRCUIT_OPEN code and wait time suggestions
- Transition to HALF_OPEN after reset timeout
- Recovery to CLOSED after successful half-open requests
- Return to OPEN on failure during half-open
- Failure count reset on success
- retryWithBackoff:
- First-attempt success without retrying
- Retry on retryable errors (NetworkError, 5xx, RateLimitError)
- No retry on non-retryable errors (validation, 4xx)
- Custom retry conditions
- onRetry callback invocation
- RateLimitError with retry-after delay
- RetryableCircuitBreaker:
- Separate circuit breakers per key
- Retry logic integration
- Reset individual and all breakers
- Default options fallback
- withRetry: function wrapper with argument passthrough
- batchRetryWithBreaker: parallel operations with mixed results
- Files changed:
- src/__tests__/utils/retry.test.ts (new, 432 lines)
- **Learnings:**
- ESM mocking with jest.unstable_mockModule has path resolution issues in this project
- Tests can avoid mocking by not triggering code paths that require mocked modules
- Use afterEach to restore process.env for clean test isolation
- Pre-existing test failures in SkillsManager tests continue to be unrelated
---
## 2026-01-12 - IMP-013
- Added comprehensive test suite for HTTP agent pool
- Created src/__tests__/utils/http-agent-pool.test.ts with 27 tests:
- Singleton pattern:
- Same instance on multiple getInstance calls
- Instance with default options (maxSockets, maxFreeSockets)
- Instance with custom options
- Options ignored on subsequent calls
- getAgent:
- Returns HTTPS agent for https:// URLs
- Returns HTTP agent for http:// URLs
- Metrics:
- Initial metrics with zero values
- Returns copy of metrics (not reference)
- Metrics interval setup when enabled
- Destroy:
- Destroys both agents
- Clears metrics interval
- UpdateConfig:
- Creates new instance with updated options
- Keep-alive timeout:
- Configures timeout on both agents
- TLS settings:
- Certificate verification enabled by default
- Certificate verification can be disabled
- getDefaultAgentPool:
- Default environment values
- Environment variable overrides
- JAMF_ALLOW_INSECURE disables cert verification
- HTTP_ENABLE_METRICS enables metrics
- cleanupAgentPool:
- Destroys agent pool
- Agent configuration:
- Keep-alive enabled
- FIFO scheduling
- Files changed:
- src/__tests__/utils/http-agent-pool.test.ts (new, 424 lines)
- **Learnings:**
- Singleton patterns require jest.resetModules() to reset between tests
- Access internal agent options via type casting: (agent as unknown as { options: T })
- HTTP/HTTPS agents expose maxSockets, maxFreeSockets, keepAlive directly
- Scheduling option is stored in options sub-object, not on agent directly
- Pre-existing test failures in SkillsManager tests continue to be unrelated
---
## 2026-01-12 - IMP-014
- Committed all improvements and created PR
- Pushed ralph/improvements branch to origin
- Created PR #7 with comprehensive description
- PR URL: https://github.com/dbankscard/jamf-mcp-server/pull/7
- Summary of all 13 improvements included
- Files changed:
- scripts/ralph/prd.json (marked IMP-014 as passes: true)
- scripts/ralph/progress.txt (added learnings)
- **Learnings:**
- Use `gh pr create` with HEREDOC for multi-line PR body
- Pre-existing test failures should be documented in PR notes
- Track final commit with conventional commit format: chore: [ID] - [Title]
