[CI] (97c6d9f) javascript-node/express-todo

[wizard-ci-bot]

Automated wizard CI run

Source: wizard-pr
Trigger ID: 97c6d9f
App: javascript-node/express-todo
App directory: apps/javascript-node/express-todo
Workbench branch: wizard-ci-97c6d9f-javascript-node-express-todo
Wizard branch: release-please--branches--main--components--wizard
Context Mill branch: main
PostHog (MCP) branch: master
Timestamp: 2026-06-23T15:50:16.725Z
Duration: 2025.4s

[wizard-ci-bot]

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PR Evaluation Report

Summary

This PR integrates PostHog analytics into a server-side Express.js todo API. The posthog-node SDK is added to dependencies, initialized with environment variables, and used to capture four meaningful CRUD events (todo_created, todo_updated, todo_completed, todo_deleted). Express-specific middleware (setupExpressRequestContext, setupExpressErrorHandler) is correctly wired up for request context and error tracking, and a graceful shutdown handler flushes events on SIGTERM.

Files changed	Lines added	Lines removed
3	+82	-2

Confidence score: 4/5 👍

• No .env.example file: Environment variable names (POSTHOG_API_KEY, POSTHOG_HOST) are mentioned in the setup report but no .env.example was created or updated for collaborators. [MEDIUM]

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File changes

Filename	Score	Description
index.js	5/5	PostHog SDK imported, initialized, capture calls added to all CRUD routes, error handler and graceful shutdown added
package.json	5/5	posthog-node dependency added
posthog-setup-report.md	4/5	Setup report documenting events and next steps; mentions env vars but no actual .env.example committed

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App sanity check ⚠️

Criteria	Result	Description
App builds and runs	Yes	No syntax errors; posthog-node exports verified (PostHog, setupExpressRequestContext, setupExpressErrorHandler all exist)
Preserves existing env vars & configs	Yes	Existing PORT env var and all route behavior preserved
No syntax or type errors	Yes	Valid CommonJS, correct API usage throughout
Correct imports/exports	Yes	All three imports from posthog-node verified as real exported functions
Minimal, focused changes	Yes	Only PostHog-related additions; no unrelated refactors
Pre-existing issues	None	Base app is clean

Issues

• No .env.example file committed: POSTHOG_API_KEY and POSTHOG_HOST are required for the app to work but no .env.example was created. The setup report mentions this as a "verify before merging" step, but the wizard should have created it. [MEDIUM]

Other completed criteria

• Build configuration valid — package.json is well-formed with correct dependency entry
• Existing app code preserved — all original route logic intact, only additive changes

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PostHog implementation ✅

Criteria	Result	Description
PostHog SDKs installed	Yes	posthog-node@^5.38.3 added to package.json dependencies
PostHog client initialized	Yes	new PostHog(process.env.POSTHOG_API_KEY, { host, enableExceptionAutocapture }) — correct server-side pattern
capture()	Yes	Four capture calls covering all CRUD operations with contextual properties
identify()	N/A	Server-only Express app
Error tracking	Yes	setupExpressErrorHandler(posthog, app) registered after routes + enableExceptionAutocapture: true in init config
Reverse proxy	N/A	Server-only app — reverse proxy not applicable

Issues

None.

Other completed criteria

• API key loaded from process.env.POSTHOG_API_KEY — not hardcoded
• Host configured from process.env.POSTHOG_HOST
• setupExpressRequestContext middleware registered before routes for automatic request metadata attachment
• Graceful shutdown via SIGTERM handler calling posthog.shutdown() to flush queued events
• distinctId sourced from x-posthog-distinct-id header with fallback to req.ip — appropriate for server-side context

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PostHog insights and events ✅

Filename	PostHog events	Description
index.js	todo_created	Captured on POST /api/todos — tracks new todo creation with todo_id and title
index.js	todo_updated	Captured on PATCH /api/todos/:id — tracks updates with todo_id, title, completed
index.js	todo_completed	Captured on PATCH when todo transitions from incomplete → complete — enables completion funnel
index.js	todo_deleted	Captured on DELETE /api/todos/:id — tracks deletions with todo_id and title
index.js	capturedException	Via setupExpressErrorHandler — captures unhandled Express errors automatically

Issues

None.

Other completed criteria

• Events represent real user actions (create, update, complete, delete todos)
• Events enable product insights — can build creation→completion funnel, deletion rate trends, activity over time
• All events include enriched properties (todo_id, title, completed where relevant)
• No PII in event properties — todo_id and title are application data, not personal information
• Consistent snake_case naming convention across all events

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Reviewed by wizard workbench PR evaluator