android-encrypted-archiver/.planning/phases/05-shell-decoder/05-02-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
05-shell-decoder	02	shell-decoder	posix-sh cross-validation sha256 test-script busybox cyrillic	phase plan provides 05-shell-decoder 01 shell/decode.sh -- busybox-compatible POSIX shell decoder phase provides 02-core-archiver Rust archiver CLI for creating test archives	shell/test_decoder.sh -- cross-validation test script (6 tests, Rust pack -> Shell decode -> SHA-256 verify) Validated shell decoder correctness across all edge cases: text, binary, no-compress, empty, large, Cyrillic filenames	06-obfuscation	added patterns bash-test-framework cross-validation-testing rust-pack-shell-decode-sha256-verify	created shell/test_decoder.sh	All 6 tests passed on first run -- no decode.sh fixes needed Used sh (not bash) to invoke decode.sh in tests for POSIX compatibility validation Followed kotlin/test_decoder.sh pattern for consistency across decoder test suites	Cross-validation test pattern: Rust pack -> decoder unpack -> SHA-256 comparison (reusable for any decoder) Test script structure: prerequisites -> build -> test cases -> summary with pass/fail counts	SHL-01 SHL-02 SHL-03	2min	2026-02-25

Phase 5 Plan 2: Shell Decoder Cross-Validation Tests Summary

Cross-validation test script with 6 test cases (single file, multiple files, no-compress, empty, large 100KB, Cyrillic filename) all passing on first run via Rust pack -> sh decode.sh -> SHA-256 verify

Performance

• Duration: 2 min
• Started: 2026-02-24T22:42:47Z
• Completed: 2026-02-24T22:44:38Z
• Tasks: 2
• Files created: 1

Accomplishments

• Created comprehensive cross-validation test script (275 lines) following kotlin/test_decoder.sh pattern
• All 6 test cases passed on first run with zero decode.sh fixes needed
• Validated SHL-01 (single text file), SHL-02 (no-compress mode), and SHL-03 (Cyrillic UTF-8 filename)
• Verified shell decoder produces byte-identical output to originals via SHA-256 comparison
• Confirmed existing Rust test suite (6 tests) still passes -- no regressions

Task Commits

Each task was committed atomically:

1. Task 1: Create shell/test_decoder.sh cross-validation test script - e9d7442 (test)
2. Task 2: Run cross-validation tests and fix any decode.sh issues - no commit (all tests passed, no fixes needed)

Files Created/Modified

• shell/test_decoder.sh - Cross-validation test script: 6 test cases covering all edge cases for shell decoder

Decisions Made

• All 6 tests passed on first run -- decode.sh implementation from Plan 1 was correct
• Used sh "$DECODER" (not bash) to invoke decode.sh, ensuring POSIX sh compatibility is tested
• Followed kotlin/test_decoder.sh pattern exactly for consistency across decoder test suites
• 7 total assertions across 6 tests (Test 2 verifies both text.txt and binary.bin)

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None.

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• Shell decoder fully validated with cross-validation tests
• Phase 5 (Shell Decoder) is complete: both decode script and test suite done
• Phase 6 (Obfuscation) can extend decode.sh with XOR header deobfuscation and encrypted TOC parsing
• Test script can serve as regression test when obfuscation layer is added

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Self-Check: PASSED

• FOUND: shell/test_decoder.sh
• FOUND: commit e9d7442
• FOUND: 05-02-SUMMARY.md

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Phase: 05-shell-decoder Completed: 2026-02-25