docs(09-01): complete Kotlin decoder update plan
- Summary: v1.1 Kotlin decoder with directory support and permission restoration - STATE.md: Phase 9 complete, 13 plans total - ROADMAP.md: Phase 09 progress updated - REQUIREMENTS.md: KOT-05, KOT-06, KOT-07 marked complete Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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NikitolProject
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### Kotlin Decoder
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- [ ] **KOT-05**: Парсинг нового TOC с типом записи и permissions
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- [ ] **KOT-06**: Создание иерархии директорий при извлечении
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- [ ] **KOT-07**: Установка permissions (File.setReadable/setWritable/setExecutable)
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- [x] **KOT-05**: Парсинг нового TOC с типом записи и permissions
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- [x] **KOT-06**: Создание иерархии директорий при извлечении
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- [x] **KOT-07**: Установка permissions (File.setReadable/setWritable/setExecutable)
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### Shell Decoder
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| DIR-03 | Phase 8 | Complete |
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| DIR-04 | Phase 8 | Complete |
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| DIR-05 | Phase 8 | Complete |
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| KOT-05 | Phase 9 | Pending |
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| KOT-06 | Phase 9 | Pending |
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| KOT-07 | Phase 9 | Pending |
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| KOT-05 | Phase 9 | Complete |
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| KOT-06 | Phase 9 | Complete |
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| KOT-07 | Phase 9 | Complete |
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| SHL-04 | Phase 10 | Pending |
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| SHL-05 | Phase 10 | Pending |
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| SHL-06 | Phase 10 | Pending |
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@@ -2,13 +2,13 @@
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gsd_state_version: 1.0
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milestone: v1.0
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milestone_name: Directory Support
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status: unknown
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last_updated: "2026-02-26T18:54:07.801Z"
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status: in-progress
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last_updated: "2026-02-26T19:05:44Z"
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progress:
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total_phases: 8
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completed_phases: 8
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total_plans: 12
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completed_plans: 12
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total_phases: 9
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completed_phases: 9
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total_plans: 13
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completed_plans: 13
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---
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# Project State
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@@ -18,28 +18,29 @@ progress:
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See: .planning/PROJECT.md (updated 2026-02-25)
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**Core value:** Archive impossible to unpack without knowing the format -- standard tools (7z, tar, unzip, binwalk) cannot recognize or extract contents
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**Current focus:** Milestone v1.1 Directory Support -- Phase 8: Rust Directory Archiver COMPLETE
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**Current focus:** Milestone v1.1 Directory Support -- Phase 9: Kotlin Decoder Update COMPLETE
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## Current Position
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Phase: 8 of 11 (Rust Directory Archiver) -- COMPLETE
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Phase: 9 of 11 (Kotlin Decoder Update) -- COMPLETE
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Plan: 1 of 1 -- COMPLETE
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Status: Phase 8 complete, v1.1 directory support implemented and tested
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Last activity: 2026-02-26 -- Phase 8 Plan 01 executed (directory archival in Rust)
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Status: Phase 9 complete, Kotlin decoder updated for v1.1 format with directory support
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Last activity: 2026-02-26 -- Phase 9 Plan 01 executed (Kotlin decoder v1.1 update)
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Progress: [############........] 63% (12/~19 plans estimated)
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Progress: [#############.......] 68% (13/~19 plans estimated)
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## Performance Metrics
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**Velocity:**
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- Total plans completed: 12
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- Average duration: 3.8 min
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- Total plans completed: 13
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- Average duration: 3.6 min
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- Total execution time: 0.8 hours
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| Phase | Plan | Duration | Tasks | Files |
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|-------|------|----------|-------|-------|
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| 07-01 | Format Spec Update | 8 min | 2 | 1 |
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| 08-01 | Rust Directory Archiver | 6 min | 3 | 4 |
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| 09-01 | Kotlin Decoder Update | 2 min | 2 | 2 |
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## Accumulated Context
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@@ -62,6 +63,9 @@ Recent decisions affecting current work:
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- v1.1: Extracted crypto pipeline into process_file() helper for reuse
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- v1.1: Directory entries skip data_offset computation (offset=0, no ciphertext)
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- v1.1: Permissions stored as lower 12 bits of mode_t (0o7777 mask)
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- v1.1: Kotlin decoder uses Java File API owner/everyone permission model (no group-level granularity)
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- v1.1: Directory entries in Kotlin decoder skip crypto pipeline entirely, use mkdirs()
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- v1.1: Permission application order: everyone flags first, then owner-only overrides
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### Pending Todos
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## Session Continuity
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Last session: 2026-02-26
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Stopped at: Completed 08-01-PLAN.md -- Phase 8 complete, v1.1 directory support implemented
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Stopped at: Completed 09-01-PLAN.md -- Phase 9 complete, Kotlin decoder updated for v1.1
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Resume file: None
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104
.planning/phases/09-kotlin-decoder-update/09-01-SUMMARY.md
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104
.planning/phases/09-kotlin-decoder-update/09-01-SUMMARY.md
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---
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phase: 09-kotlin-decoder-update
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plan: 01
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subsystem: decoder
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tags: [kotlin, android, directory-support, binary-format, permissions, cross-validation]
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# Dependency graph
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requires:
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- phase: 08-rust-directory-archiver
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provides: v1.1 Rust archiver with directory traversal, entry_type/permissions in TOC
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provides:
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- v1.1-compatible Kotlin decoder with directory support and permission restoration
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- Cross-validation test script with 8 test cases (5 original + 3 directory)
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affects: [10-hardening, 11-polish]
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# Tech tracking
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tech-stack:
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added: []
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patterns: [applyPermissions pattern using Java File API owner/everyone distinction, directory-first extraction with parent directory creation]
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key-files:
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created: []
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modified:
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- kotlin/ArchiveDecoder.kt
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- kotlin/test_decoder.sh
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key-decisions:
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- "Java File API owner/everyone permission model sufficient for KOT-07 (no group-level granularity)"
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- "Directory entries processed before file entries naturally via DFS preorder parent-before-child ordering"
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- "Permission application: set everyone flags first (ownerOnly=false), then override owner-only (ownerOnly=true)"
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patterns-established:
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- "applyPermissions(): extract POSIX mode bits and map to Java File setReadable/setWritable/setExecutable"
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- "Entry type dispatch: directory entries skip crypto pipeline entirely, file entries ensure parent dirs exist"
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requirements-completed: [KOT-05, KOT-06, KOT-07]
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# Metrics
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duration: 2min
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completed: 2026-02-26
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---
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# Phase 9 Plan 01: Kotlin Decoder Update Summary
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**v1.1 Kotlin decoder with directory hierarchy creation, empty directory support, and POSIX permission restoration via Java File API**
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## Performance
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- **Duration:** 2 min
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- **Started:** 2026-02-26T19:03:18Z
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- **Completed:** 2026-02-26T19:05:44Z
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- **Tasks:** 2
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- **Files modified:** 2
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## Accomplishments
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- Updated TocEntry data class with entryType (0=file, 1=directory) and permissions (12-bit POSIX mode_t) fields
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- Kotlin decoder now parses v1.1 TOC entries (104 + name_length bytes) with entry_type and permissions
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- Directory entries create full hierarchy via mkdirs() without attempting decryption
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- File entries with relative paths create parent directories before writing
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- Permissions restored via Java File API (setReadable/setWritable/setExecutable with owner/everyone distinction)
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- Test script expanded from 5 to 8 test cases with nested directory, empty directory, and mixed file/directory tests
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## Task Commits
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Each task was committed atomically:
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1. **Task 1: Update ArchiveDecoder.kt for v1.1 format with directory support** - `a01b260` (feat)
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2. **Task 2: Update test_decoder.sh with directory test cases** - `27fb392` (test)
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## Files Created/Modified
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- `kotlin/ArchiveDecoder.kt` - v1.1 decoder: entryType/permissions parsing, directory handling, permission restoration
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- `kotlin/test_decoder.sh` - 3 new directory test cases (nested dirs, empty dir, mixed files+dirs)
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## Decisions Made
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- Used Java File API owner/everyone permission model (no Java NIO PosixFilePermission) per KOT-07 spec
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- Permission application order: set everyone flags first (ownerOnly=false), then owner-only overrides (ownerOnly=true) to correctly handle cases where owner has permissions but others do not
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- Entry size formula updated from 101 to 104 + name_length consistently
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## Deviations from Plan
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None - plan executed exactly as written.
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## Issues Encountered
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None - all tasks completed without issues.
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## User Setup Required
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None - no external service configuration required.
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## Next Phase Readiness
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- Kotlin decoder fully compatible with v1.1 format produced by Rust archiver
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- Cross-validation test script ready with 8 test cases covering files, directories, empty dirs, and mixed content
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- Ready for Phase 10 (hardening) or Phase 11 (polish)
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## Self-Check: PASSED
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- [x] kotlin/ArchiveDecoder.kt exists
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- [x] kotlin/test_decoder.sh exists
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- [x] 09-01-SUMMARY.md exists
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- [x] Commit a01b260 (Task 1) verified
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- [x] Commit 27fb392 (Task 2) verified
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---
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*Phase: 09-kotlin-decoder-update*
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*Completed: 2026-02-26*
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