---
phase: 18-verification-and-integration
plan: 01
subsystem: infra
tags: [branch-integration, cherry-pick, version-bump, test-harness, vtab-crash]

# Dependency graph
requires:
  - phase: 17-ddl-execution
    provides: "Parser extension code on feat/cpp-entry-point branch"
  - phase: 17.1-python-vtab-crash-investigation
    provides: "Defensive crash fixes on gsd/v0.1-milestone branch"
provides:
  - "gsd/v0.5-milestone branch with all Phase 15-17.1 code integrated"
  - "test-vtab-crash target in Justfile, included in test-all chain"
  - "Cargo.toml version bumped to 0.5.0"
  - "Full test suite green baseline (149 Rust + 4 SQL + 6 DuckLake CI + 13 vtab crash)"
affects: [18-02, milestone-closure]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "Cherry-pick integration for disjoint branch merging"
    - "test-vtab-crash as permanent regression gate in test-all"

key-files:
  created: []
  modified:
    - "Justfile"
    - "Cargo.toml"

key-decisions:
  - "Cherry-pick of 3 Phase 17.1 commits applied cleanly to feat/cpp-entry-point (zero conflicts, disjoint file sets)"
  - "DuckDB amalgamation files (duckdb.hpp, duckdb.cpp) are gitignored and must be downloaded before extension build"
  - "BUILD-04 confirmed structurally: build.rs exits immediately without CARGO_FEATURE_EXTENSION"
  - "VERIFY-02 confirmed: phase16_parser.test exists in TEST_LIST and runs as part of test-sql"

patterns-established:
  - "test-vtab-crash: Python crash reproduction tests as permanent CI gate via uv run"

requirements-completed: [VERIFY-01, VERIFY-02, BUILD-04]

# Metrics
duration: 9min
completed: 2026-03-08
---

# Phase 18 Plan 01: Branch Integration and Test Baseline Summary

**Integrated feat/cpp-entry-point and gsd/v0.1-milestone into gsd/v0.5-milestone with all 172 tests green, version 0.5.0, and test-vtab-crash in test-all**

## Performance

- **Duration:** 9 min
- **Started:** 2026-03-08T09:37:21Z
- **Completed:** 2026-03-08T09:47:03Z
- **Tasks:** 2
- **Files modified:** 2 (Justfile, Cargo.toml) + 11 planning docs synced

## Accomplishments
- Created gsd/v0.5-milestone branch from feat/cpp-entry-point with 3 Phase 17.1 cherry-picks (zero conflicts)
- Added test-vtab-crash recipe to Justfile and included it in test-all dependency chain
- Bumped Cargo.toml version from 0.4.0 to 0.5.0
- Full test suite passes: 149 Rust tests + 4 SQL logic tests + 6 DuckLake CI tests + 13 vtab crash tests = 172 total
- Verified BUILD-04 (cargo test without C++ compilation) and VERIFY-02 (phase16_parser.test in test-sql)

## Task Commits

Each task was committed atomically:

1. **Task 1: Create integrated branch and update test harness** - `feffda7` (chore) + cherry-picks `8180e06`, `e2e9497`, `ac84e09`
2. **Task 2: Run full test suite baseline and verify BUILD-04** - `969c252` (chore: sync planning docs)

## Files Created/Modified
- `Justfile` - Added test-vtab-crash recipe, updated test-all to include it
- `Cargo.toml` - Version bump from 0.4.0 to 0.5.0

## Decisions Made
- Cherry-pick strategy validated: feat/cpp-entry-point and gsd/v0.1-milestone had completely disjoint file sets, all 3 cherry-picks applied cleanly
- DuckDB amalgamation files (duckdb.hpp, duckdb.cpp) needed manual download via curl (gitignored, not tracked)
- BUILD-04 structurally verified: build.rs line 22-24 returns immediately when CARGO_FEATURE_EXTENSION is absent, preventing all C++ compilation during cargo test
- VERIFY-02 confirmed: phase16_parser.test is listed in test/sql/TEST_LIST and exercised by test-sql (4/4 SUCCESS)

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 3 - Blocking] Downloaded missing DuckDB amalgamation files**
- **Found during:** Task 2 (test-all baseline)
- **Issue:** `cpp/include/duckdb.cpp` and `cpp/include/duckdb.hpp` are gitignored and missing from the working tree, causing the extension build (make debug) to fail with "no such file or directory"
- **Fix:** Downloaded DuckDB v1.4.4 amalgamation via curl from GitHub releases, extracted to cpp/include/
- **Files modified:** cpp/include/duckdb.cpp, cpp/include/duckdb.hpp (gitignored, not committed)
- **Verification:** just test-all passes after download
- **Committed in:** N/A (gitignored files)

**2. [Rule 3 - Blocking] Synced planning docs from gsd/v0.1-milestone**
- **Found during:** Task 2 (needed for state updates)
- **Issue:** Phase 17.1 summaries, Phase 18 plans/research, and STATE.md/ROADMAP.md/REQUIREMENTS.md were on gsd/v0.1-milestone but not on the new branch
- **Fix:** Used git checkout to copy specific files from gsd/v0.1-milestone to the new branch
- **Files modified:** 11 planning files (summaries, plans, state)
- **Verification:** All planning files present and correct
- **Committed in:** 969c252

---

**Total deviations:** 2 auto-fixed (2 blocking)
**Impact on plan:** Both auto-fixes were necessary infrastructure work. The amalgamation download is expected (files are gitignored by design). The doc sync was needed because the new branch was created from a different base. No scope creep.

## Issues Encountered
- `update-headers` Justfile recipe has a pre-existing syntax issue with brace expansion (`{hpp,cpp}`) in sh mode. Worked around by running curl/unzip directly. This is a pre-existing issue, not caused by this plan.

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- gsd/v0.5-milestone branch is fully integrated with all tests green
- Ready for Plan 18-02: binary verification, ABI evaluation, TECH-DEBT.md update, and final gate
- All planning docs synced and available on the new branch

## Self-Check: PASSED

- [x] Justfile exists with test-vtab-crash recipe and test-all dependency
- [x] Cargo.toml has version = "0.5.0"
- [x] test_vtab_crash.py exists at test/integration/test_vtab_crash.py
- [x] phase16_parser.test exists at test/sql/phase16_parser.test and in TEST_LIST
- [x] Commit feffda7 exists (Task 1: harness + version)
- [x] Commit 969c252 exists (Task 2: planning doc sync)
- [x] just test-all passes with 172 total tests (149 + 4 + 6 + 13)

---
*Phase: 18-verification-and-integration*
*Completed: 2026-03-08*
