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Critical Path — Full Product Launch (PRD) ​

Version: v1.19 (Phase 86a completion)

Status: ✅ Shipped (v1.19, Phase 86a)

Overview ​

This PRD documents the product scope and requirements for the Critical Path full-product launch (daily puzzle feature). The feature is composed of five sequential release slices (R1–R5):

  • R1 — Puzzle generation and play mechanics (shipped)
  • R2 — Stim XP integration and progression (shipped)
  • R3 — Cosmetic theme unlocks and customization (shipped)
  • R4 — Share flow and native platform integration (shipped)
  • R5 — Analytics instrumentation and measurement (shipped Phase 86a)

For implementation details and event catalog, see docs/operations/critical-path-analytics.md.

R5: Analytics Instrumentation ​

Completion Status ​

✅ SHIPPED (Phase 86a, v1.19)

All 8 PostHog events from §R5 are now implemented and live:

  1. critical_path_puzzle_started — fired on puzzle load with node_count, puzzle_date, theme_active
  2. critical_path_puzzle_completed — fired on win with time_taken_seconds, move_count, percentile, stim_xp_earned, theme_active
  3. critical_path_puzzle_abandoned — fired on mid-game navigation
  4. critical_path_theme_changed — fired on theme selection with from_theme, to_theme
  5. critical_path_stim_streak_milestone — fired on 7/30/100-day streak thresholds
  6. critical_path_theme_unlocked — fired per newly unlocked cosmetic theme
  7. critical_path_share_card_generated — fired on share CTA tap
  8. critical_path_share_card_shared — fired on native share completion

Measurement Objectives ​

  • Funnel: puzzle_started → puzzle_completed conversion rate
  • Retention cohort: Users with puzzle completions on ≥3 distinct days in rolling 14-day window
  • Engagement metrics: Average solve time, theme popularity, streak milestone reach, share adoption rate

Constraints ​

  • All events behind critical-path-full-product feature flag
  • Property names snake_case, no PII in payloads
  • Events fire within the puzzle play session and on completion

Scope (Full Feature) ​

Critical Path is a daily puzzle game that integrates with the gamification system (Stim XP, streaks, badges, themes). Users solve a new puzzle each day, earn progression rewards, and optionally share results.

Next Steps ​

  • Complete PRD narrative documentation (use this outline as a template)
  • Document R1–R4 feature scopes and completion criteria
  • Add success metrics and post-launch measurement plan

Last updated: 2026-07-15 — Phase 100 audit. PRD for shipped feature (v1.19, Phase 86a) archived to completed/.

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