docs: create roadmap (8 phases)

.planning/STATE.md

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+# Project State
+
+## Project Reference
+
+See: .planning/PROJECT.md (updated 2026-05-08)
+
+**Core value:** Every idle mechanic must function as a metaphor that the player absorbs without being told. When economy and meaning conflict, meaning wins.
+**Current focus:** Phase 1 — Foundations & Doctrine
+
+## Current Position
+
+Phase: 1 of 8 (Foundations & Doctrine)
+Plan: 0 of TBD in current phase
+Status: Ready to plan
+Last activity: 2026-05-08 — Roadmap created, 77 v1 requirements mapped across 8 phases.
+
+Progress: [░░░░░░░░░░] 0%
+
+## Performance Metrics
+
+**Velocity:**
+- Total plans completed: 0
+- Average duration: —
+- Total execution time: 0.0 hours
+
+**By Phase:**
+
+| Phase | Plans | Total | Avg/Plan |
+|-------|-------|-------|----------|
+| 1. Foundations & Doctrine | 0 | 0 | — |
+
+**Recent Trend:**
+- Last 5 plans: —
+- Trend: — (no plans completed yet)
+
+*Updated after each plan completion*
+
+## Accumulated Context
+
+### Decisions
+
+Decisions are logged in PROJECT.md Key Decisions table.
+Recent decisions affecting current work:
+
+- Phase 1 will land all retrofit-hostile foundations (versioned saves, content/asset pipelines, sim/render firewall, anti-FOMO doctrine, Season 7 end-state design) before any feature code — research from all four researchers converged on this ordering.
+- Phase 2 will ship Season 1 as a complete vertical slice that could *plausibly* ship as a free standalone prologue ahead of Seasons 2-7, defending against the 7-Season scope risk.
+- Phases 4-7 deliver the remaining six Seasons in mechanic-introducing pairs (Season 2 alone with prestige, Seasons 3-4, Seasons 5-6, Season 7 alone) — at most one new mechanic per Season per the scope-defense doctrine.
+
+### Pending Todos
+
+None yet.
+
+### Blockers/Concerns
+
+Carry-forward banner concerns from research:
+- **7-Season scope risk** is the project's biggest risk; defended by the standalone-Season-1 escape hatch (Phase 2) and the one-mechanic-per-Season cap.
+- **Story ends but the loop doesn't** — Season 7 end-state design must land in Phase 1 (PIPE-05); finite Roothold ceiling enforced in Phase 4 (SEAS-04); credits/coda rest-state in Phase 7 (SEAS-10).
+- **AI asset style drift** — provenance + curation + locked north-star reference set must land in Phase 1 (AEST-08, AEST-09, PIPE-03) before any production-volume asset generation in Phase 5+; visual regression testing in Phase 8 (PIPE-04).
+
+## Deferred Items
+
+Items acknowledged and carried forward from previous milestone close:
+
+| Category | Item | Status | Deferred At |
+|----------|------|--------|-------------|
+| *(none)* | | | |
+
+## Session Continuity
+
+Last session: 2026-05-08
+Stopped at: Roadmap created and committed; ready to begin Phase 1 planning.
+Resume file: None — next action is `/gsd-discuss-phase 1`