docs(roadmap): annotate architecture checkpoints

docs/ARCHITECTURE_REVIEW_AND_REUSE_ROADMAP.md

@@ -594,6 +594,9 @@ Make `shared/product.json` the real source of truth across all surfaces.
 - auth storage prefixes are consistent
 - telemetry/diagnostics identify the same product everywhere
 
+### Checkpoint
+- Completed in [`b73d5e9`](https://github.com/saravanakumardb1/learning_ai_notes/commit/b73d5e9)
+
 ## Phase B — Remove Placeholder Local Platform Wrappers
 
 ### Goal
@@ -610,6 +613,9 @@ Delete local wrappers that do not add product-specific value.
 - no no-op telemetry wrapper
 - all remaining wrapper files have clear product-specific justification
 
+### Checkpoint
+- mobile placeholder-wrapper cleanup completed in [`86e2da8`](https://github.com/saravanakumardb1/learning_ai_notes/commit/86e2da8)
+
 ## Phase C — Real Backend Integration for Web and Mobile
 
 ### Goal
@@ -627,6 +633,9 @@ Stop using local mock/fallback data as a primary runtime path.
 - mobile note list/detail/workspaces use real APIs
 - fallback data is no longer the normal runtime path
 
+### Checkpoint
+- mobile runtime-alignment slice completed in [`8580ad3`](https://github.com/saravanakumardb1/learning_ai_notes/commit/8580ad3)
+
 ## Phase D — Shared Platform Service Completion
 
 ### Goal

docs/roadmaps/08_ARCHITECTURE_REUSE_MASTER_ROADMAP.md

@@ -36,6 +36,9 @@ This roadmap tracks the execution work required to bring `learning_ai_notes` int
 
 # Phase R0 — Identity and Boundary Lock
 
+Checkpoint:
+- Phase A completed in [`b73d5e9`](https://github.com/saravanakumardb1/learning_ai_notes/commit/b73d5e9)
+
 - [x] Confirm `shared/product.json` is the canonical product identity source
 - [x] Align web product identity defaults with `shared/product.json`
 - [x] Align mobile product identity defaults with `shared/product.json`
@@ -46,17 +49,23 @@ This roadmap tracks the execution work required to bring `learning_ai_notes` int
 
 # Phase R1 — Placeholder and Duplication Cleanup
 
+Checkpoint:
+- Phase B mobile placeholder-wrapper cleanup in [`86e2da8`](https://github.com/saravanakumardb1/learning_ai_notes/commit/86e2da8)
+
 - [ ] Inventory all repo-local platform/config/wrapper files
-- [ ] Delete or replace wrapper files that are no-op or fake readiness scaffolds
+- [x] Delete or replace wrapper files that are no-op or fake readiness scaffolds
 - [ ] Remove duplicated raw product identity literals
 - [ ] Remove long-term runtime dependence on route-level mock/fallback datasets
 - [ ] Reduce duplicate DTO definitions where they describe the same backend object
 
 # Phase R2 — Runtime Integration Alignment
 
+Checkpoint:
+- Mobile runtime alignment checkpoint in [`8580ad3`](https://github.com/saravanakumardb1/learning_ai_notes/commit/8580ad3)
+
 - [ ] Web notes/workspaces/search/reviews use real product-backend clients
-- [ ] Mobile notes/workspaces/detail flows use real product-backend clients
-- [ ] Mobile editing persists to the backend instead of local-only state
+- [x] Mobile notes/workspaces/detail flows use real product-backend clients
+- [x] Mobile editing persists to the backend instead of local-only state
 - [ ] Artifact flows use shared blob-backed integration
 - [ ] Extraction-backed enrichment uses shared extraction service
 

docs/roadmaps/11_MOBILE_REUSE_ALIGNMENT_ROADMAP.md

@@ -38,17 +38,22 @@ Make the React Native / Expo MVP follow the ByteLyst reuse-first path more stric
 
 # Phase M2 — Remove Placeholder Local Wrappers
 
-- [ ] Delete or replace `mobile/src/lib/platform.ts`
-- [ ] Delete or replace `mobile/src/lib/telemetry.ts`
-- [ ] Audit other local helper files for no-op or placeholder behavior
+Checkpoint:
+- Placeholder wrapper cleanup completed in [`86e2da8`](https://github.com/saravanakumardb1/learning_ai_notes/commit/86e2da8)
+- [x] Delete or replace `mobile/src/lib/platform.ts`
+- [x] Delete or replace `mobile/src/lib/telemetry.ts`
+- [x] Audit other local helper files for no-op or placeholder behavior
 - [ ] Keep only thin product-specific composition helpers that add real value
 
 # Phase M3 — Replace Fallback Runtime Paths
 
-- [ ] Replace fallback notes as the primary runtime path
-- [ ] Replace inline workspace returns with real API calls
-- [ ] Persist note edits to the backend
-- [ ] Align mobile note detail with real backend fields
+Checkpoint:
+- Mobile backend-backed runtime alignment completed in [`8580ad3`](https://github.com/saravanakumardb1/learning_ai_notes/commit/8580ad3)
+
+- [x] Replace fallback notes as the primary runtime path
+- [x] Replace inline workspace returns with real API calls
+- [x] Persist note edits to the backend
+- [x] Align mobile note detail with real backend fields
 - [ ] Ensure approval/activity flows use real backend-backed data where intended
 
 # Phase M4 — Shared Platform Completion