phase29aq(p1): add stdlib scan/parse/split subsets

docs/development/current/main/10-Now.md

@@ -3,7 +3,7 @@
 ## Current Focus
 
 - Phase: `docs/development/current/main/phases/phase-29aq/README.md`
-- Next: Phase 29aq P1 (stdlib subset additions)
+- Next: Phase 29aq P2 (stdlib scan subset extensions)
 
 ## Gate (SSOT)
 

docs/development/current/main/30-Backlog.md

@@ -5,7 +5,7 @@ Scope: 「次にやる候補」を短く列挙するメモ。入口は `docs/dev
 
 ## Active
 
-- Phase 29aq: `docs/development/current/main/phases/phase-29aq/README.md` (Next: P1 subsets)
+- Phase 29aq: `docs/development/current/main/phases/phase-29aq/README.md` (Next: P2 scan subsets)
 - JoinIR regression gate SSOT: `docs/development/current/main/phases/phase-29ae/README.md`
 - CorePlan hardening (docs-first): `docs/development/current/main/phases/phase-29al/README.md`
 

docs/development/current/main/design/coreplan-migration-roadmap-ssot.md

@@ -34,7 +34,7 @@ Related:
 ## 1.1 Current (active)
 
 - Active phase: `docs/development/current/main/phases/phase-29aq/README.md`
-- Next step: Phase 29aq P1 (stdlib subset additions)
+- Next step: Phase 29aq P2 (stdlib scan subset extensions)
 
 ## 2. すでに固めた SSOT（再発防止の土台）
 

docs/development/current/main/phases/phase-29ae/README.md

@@ -15,6 +15,10 @@ Goal: JoinIR の最小回帰セットを SSOT として固定する。
 - Pattern1 (subset reject, VM): `phase29ao_pattern1_subset_reject_extra_stmt_vm`
 - Pattern1 (stdlib to_lower, VM): `phase29ap_stringutils_tolower_vm`
 - Pattern1 (stdlib join, VM): `phase29ap_stringutils_join_vm`
+- ScanWithInit (stdlib index_of, VM): `phase29aq_string_index_of_min_vm`
+- ScanWithInit (stdlib last_index_of, VM): `phase29aq_string_last_index_of_min_vm`
+- Pattern2 (stdlib parse_integer, VM): `phase29aq_string_parse_integer_min_vm`
+- SplitScan (stdlib split, VM): `phase29aq_string_split_min_vm`
 - Pattern5 (Break, VM): `phase286_pattern5_break_vm`
 - Pattern5 (strict shadow, VM): `phase29ao_pattern5_strict_shadow_vm`
 - Pattern5 (release adopt, VM): `phase29ao_pattern5_release_adopt_vm`

docs/development/current/main/phases/phase-29aq/P1-INDEXOF-PARSEINT-SPLIT-SUBSET-INSTRUCTIONS.md

@@ -1,5 +1,5 @@
 ---
-Status: Planned
+Status: Done
 Scope: stdlib subsets (index_of/last_index_of, parse_integer, split)
 Related:
 - docs/development/current/main/phases/phase-29aq/README.md

docs/development/current/main/phases/phase-29aq/README.md

@@ -54,4 +54,10 @@ Plan/Composer subsets (or mark unsupported) before adding new subsets.
 
 ## Next (planned)
 
+## Progress
+
 - P1: Add stdlib subsets in priority order (index_of/last_index_of → parse_integer → split).
+
+## Next (planned)
+
+- P2: Extend stdlib scan subsets (candidate: index_of_string, to_upper).