docs: start frontend mvp milestone

.planning/PROJECT.md

@@ -20,20 +20,38 @@ each short practice loop.
 
 ### Validated
 
-(None yet; ship to validate.)
+- [x] Developer job seekers can complete a diagnostic technical interview.
+- [x] Answers are graded with rubrics and preserved as evidence.
+- [x] Learner memory tracks concept mastery, misconceptions, evidence, and
+  interventions.
+- [x] The system selects the next best interview challenge from learner state.
+- [x] The user sees a readiness map and meaningful progression after each loop.
+- [x] Uploaded learning materials can become source-backed ontology candidates.
+- [x] Generated learning assets preserve prompt, source, and review lineage.
+- [x] Backend implementation uses Go and keeps `agent-farm-go` workflow patterns
+  internalized behind typed interfaces.
 
 ### Active
 
-- [ ] Developer job seekers can complete a diagnostic technical interview.
-- [ ] Answers are graded with rubrics and preserved as evidence.
-- [ ] Learner memory tracks concept mastery, misconceptions, evidence, and
-  interventions.
-- [ ] The system selects the next best interview challenge from learner state.
-- [ ] The user sees a readiness map and meaningful progression after each loop.
-- [ ] Uploaded learning materials can become source-backed ontology candidates.
-- [ ] Generated learning assets preserve prompt, source, and review lineage.
-- [ ] Backend implementation uses Go and keeps `agent-farm-go` workflow patterns
-  internalized behind typed interfaces.
+- [ ] Job seekers can use the first web app without API tooling.
+- [ ] The web app guides users through diagnostic practice and shows feedback.
+- [ ] The web app shows learner memory, readiness, and next challenge after
+  practice.
+- [ ] Operators can ingest learning material and inspect ontology candidates.
+- [ ] Operators can generate source-backed teaching asset prompt candidates.
+
+## Current Milestone: v2 Frontend MVP
+
+**Goal:** Turn the completed backend learning loop into a usable web service
+experience for developer job seekers.
+
+**Target features:**
+
+- Web app shell served by the Go backend.
+- Diagnostic interview practice UI.
+- Learner memory, readiness map, and next challenge views.
+- Material ingestion and ontology snapshot UI.
+- Teaching asset prompt candidate UI.
 
 ### Out of Scope
 
@@ -81,6 +99,26 @@ each short practice loop.
 | Game-inspired progression must be evidence-backed | Creates retention without empty rewards | Pending |
 | 600-line source limit | Forces responsibility boundaries early | Pending |
 | Backend Developer Interview first track | Gives a broad but testable MVP concept set | Pending |
+| v2 frontend first | The backend loop is proven; the next risk is whether users can operate it as a web service | Active |
+
+## Evolution
+
+This document evolves at phase transitions and milestone boundaries.
+
+**After each phase transition**:
+
+1. Requirements invalidated? Move to Out of Scope with reason.
+2. Requirements validated? Move to Validated with phase reference.
+3. New requirements emerged? Add to Active.
+4. Decisions to log? Add to Key Decisions.
+5. "What This Is" still accurate? Update if drifted.
+
+**After each milestone**:
+
+1. Full review of all sections.
+2. Core Value check: still the right priority?
+3. Audit Out of Scope: reasons still valid?
+4. Update Context with current state.
 
 ---
-*Last updated: 2026-04-26 after first track and Phase 1 plan were set.*
+*Last updated: 2026-04-26 after v2 Frontend MVP milestone start.*