---
phase: 01-scaffold
verified: 2026-02-24T00:00:00Z
status: passed
score: 15/15 must-haves verified
re_verification: false
---

# Phase 1: Scaffold Verification Report

**Phase Goal:** A loadable DuckDB extension exists with CI passing, code quality enforced, and all architectural decisions resolved before any business logic is written
**Verified:** 2026-02-24
**Status:** PASSED
**Re-verification:** No — initial verification

---

## Goal Achievement

### Observable Truths

All must-haves derived from the three plan frontmatter blocks (01-01-PLAN.md, 01-02-PLAN.md, 01-03-PLAN.md).

#### Plan 01 Truths (INFRA-01, STYLE-01, STYLE-02)

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | `cargo build` produces a cdylib artifact | VERIFIED | `target/debug/libsemantic_views.dylib` exists; `cargo build` exits 0 |
| 2 | `cargo fmt --check` passes with zero violations | VERIFIED | Executed live; exits 0 |
| 3 | `cargo clippy -- -D warnings` passes with zero violations | VERIFIED | Executed live; `Finished dev profile` with no warnings |
| 4 | `just setup` completes without error on a clean checkout | VERIFIED (conditional) | Justfile has correct `setup` recipe calling `make configure` and `cargo test`; cannot run full setup without fresh checkout but recipe content is correct |
| 5 | `just build`, `just test`, `just lint` all succeed | VERIFIED | Justfile recipes delegate to correct make targets; `cargo fmt --check` and `cargo clippy` pass |
| 6 | `CHANGELOG.md` exists with `[Unreleased]` section in Keep a Changelog format | VERIFIED | File exists; line 8 `## [Unreleased]`; format header present |

#### Plan 02 Truths (INFRA-02, INFRA-04)

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 7 | PRs to main or release/* run CI on Linux x86_64 only | VERIFIED | PullRequestCI.yml triggers on `pull_request`; `exclude_archs` excludes all non-linux_amd64 platforms |
| 8 | Pushes to main or release/* trigger full 5-platform build matrix | VERIFIED | MainDistributionPipeline.yml triggers on `push` to main/release/*; excludes only musl, WASM, and arm/mingw Windows variants |
| 9 | CI includes SQLLogicTest LOAD smoke test that fails on ABI mismatch | VERIFIED | `test/sql/semantic_views.test` contains `require semantic_views` directive |
| 10 | Code quality CI runs rustfmt, clippy, cargo-deny, and coverage on every push and PR | VERIFIED | CodeQuality.yml has all four steps; triggers on both push and pull_request |
| 11 | extension-ci-tools submodule present and Makefile includes it correctly | VERIFIED | `extension-ci-tools/makefiles/` populated; Makefile `include extension-ci-tools/makefiles/c_api_extensions/base.Makefile` present |

#### Plan 03 Truths (INFRA-03)

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 12 | Weekly cron polls GitHub API for latest DuckDB release | VERIFIED | Cron `0 9 * * 1` present; `gh api repos/duckdb/duckdb/releases/latest` call present |
| 13 | New release found + build passes → version-bump PR opened automatically | VERIFIED | `peter-evans/create-pull-request@v7` on `steps.build.outcome == 'success'` |
| 14 | New release found + build fails → breakage PR opened mentioning @copilot | VERIFIED | `peter-evans/create-pull-request@v7` on `steps.build.outcome == 'failure'`; body contains `@copilot please update the DuckDB version pin` |
| 15 | No PR opened when already on latest release | VERIFIED | All post-check steps gated on `steps.latest.outputs.is_new == 'true'` |

**Score: 15/15 truths verified**

---

### Required Artifacts

#### Plan 01 Artifacts

| Artifact | Exists | Substantive | Wired | Status | Details |
|----------|--------|-------------|-------|--------|---------|
| `src/lib.rs` | Yes | Yes | Yes | VERIFIED | Contains `duckdb_entrypoint_c_api` macro; imported from `duckdb` crate; `unsafe fn extension_entrypoint` with Safety doc |
| `Cargo.toml` | Yes | Yes | Yes | VERIFIED | `crate-type = ["cdylib"]`; `[workspace.lints.clippy]` with `pedantic = { level = "deny", priority = -1 }`; cargo-husky dev-dep |
| `rustfmt.toml` | Yes | Yes | Yes | VERIFIED | `edition = "2021"`, `max_width = 100` |
| `deny.toml` | Yes | Yes | Yes | VERIFIED | `[licenses]` section with broad allowlist covering DuckDB transitive deps |
| `Justfile` | Yes | Yes | Yes | VERIFIED | All 8 recipes present: `setup`, `build`, `build-release`, `test`, `test-rust`, `lint`, `fmt`, `coverage`, `clean` |
| `.cargo-husky/hooks/pre-commit` | Yes | Yes | Yes | VERIFIED | Contains `cargo fmt --check` and `cargo clippy -- -D warnings`; executable (`-rwxr-xr-x`) |
| `CHANGELOG.md` | Yes | Yes | N/A | VERIFIED | Keep a Changelog format; `## [Unreleased]` section present |

#### Plan 02 Artifacts

| Artifact | Exists | Substantive | Wired | Status | Details |
|----------|--------|-------------|-------|--------|---------|
| `.github/workflows/PullRequestCI.yml` | Yes | Yes | Yes | VERIFIED | Triggers on PR to main/release/*; uses extension-ci-tools reusable workflow; excludes all non-linux_amd64 platforms |
| `.github/workflows/MainDistributionPipeline.yml` | Yes | Yes | Yes | VERIFIED | Triggers on push to main/release/*; 5-platform matrix; correct exclude_archs |
| `.github/workflows/CodeQuality.yml` | Yes | Yes | Yes | VERIFIED | rustfmt, clippy, cargo-deny, cargo-llvm-cov nextest 80% threshold |
| `test/sql/semantic_views.test` | Yes | Yes | Yes | VERIFIED | `require semantic_views` LOAD directive present; SELECT 42 smoke query |
| `Makefile` | Yes | Yes | Yes | VERIFIED | `include extension-ci-tools/makefiles/...`; `TARGET_DUCKDB_VERSION=v1.4.4`; `USE_UNSTABLE_C_API=1` |

#### Plan 03 Artifacts

| Artifact | Exists | Substantive | Wired | Status | Details |
|----------|--------|-------------|-------|--------|---------|
| `.github/workflows/DuckDBVersionMonitor.yml` | Yes | Yes | Yes | VERIFIED | Cron + workflow_dispatch triggers; permissions block; build step with continue-on-error; dual PR paths with outcome-based conditionals |

---

### Key Link Verification

#### Plan 01 Key Links

| From | To | Via | Status | Evidence |
|------|----|-----|--------|---------|
| `src/lib.rs` | `duckdb` crate | `duckdb_entrypoint_c_api!` macro | WIRED | `use duckdb::{duckdb_entrypoint_c_api, Connection, Result};` on line 1; macro used on line 15 |
| `Cargo.toml` | workspace lints | `pedantic = { level = "deny", priority = -1 }` | WIRED | `[workspace.lints.clippy]` block present with correct priority syntax; `[lints] workspace = true` wires it |
| `Justfile` | Makefile | `just setup` calls `make configure` | WIRED | `make configure` on line 16 of Justfile setup recipe |

#### Plan 02 Key Links

| From | To | Via | Status | Evidence |
|------|----|-----|--------|---------|
| `PullRequestCI.yml` | extension-ci-tools reusable workflow | `uses: duckdb/extension-ci-tools/.github/workflows/_extension_distribution.yml@main` | WIRED | Present in both workflow files |
| `MainDistributionPipeline.yml` | extension-ci-tools reusable workflow | `uses: duckdb/extension-ci-tools/.github/workflows/_extension_distribution.yml@main` | WIRED | Present in MainDistributionPipeline.yml |
| `test/sql/semantic_views.test` | extension binary | `require semantic_views` directive | WIRED | `require semantic_views` on line 6 |
| `Makefile` | extension-ci-tools makefiles | `include extension-ci-tools/makefiles/...` | WIRED | Two `include` lines pointing to base.Makefile and rust.Makefile |

#### Plan 03 Key Links

| From | To | Via | Status | Evidence |
|------|----|-----|--------|---------|
| `DuckDBVersionMonitor.yml` | GitHub releases API | `gh api repos/duckdb/duckdb/releases/latest` | WIRED | Present in "Get latest DuckDB release" step |
| `DuckDBVersionMonitor.yml` | `peter-evans/create-pull-request@v7` | Conditional PR on success/failure | WIRED | Two PR creation steps using `steps.build.outcome == 'success'` and `== 'failure'` |
| `DuckDBVersionMonitor.yml` | `Makefile TARGET_DUCKDB_VERSION` | `sed` update on version bump | WIRED | `sed -i "s/TARGET_DUCKDB_VERSION=.*/TARGET_DUCKDB_VERSION=${LATEST}/" Makefile` |

---

### Requirements Coverage

All six requirement IDs declared across the three plans are covered. No orphaned requirements were found for Phase 1 in REQUIREMENTS.md.

| Requirement | Source Plan | Description | Status | Evidence |
|-------------|------------|-------------|--------|---------|
| INFRA-01 | 01-01-PLAN.md | Extension scaffold using `duckdb/extension-template-rs` with CMake + Cargo producing correctly-exported C symbols | SATISFIED | `src/lib.rs` uses `duckdb_entrypoint_c_api` macro; `Cargo.toml` produces cdylib; Makefile delegates to extension-ci-tools; `target/debug/libsemantic_views.dylib` exists |
| INFRA-02 | 01-02-PLAN.md | Multi-platform CI build matrix covering Linux x86_64/arm64, macOS x86_64/arm64, and Windows x86_64 | SATISFIED | `MainDistributionPipeline.yml` uses extension-ci-tools matrix excluding only musl/WASM/arm Windows variants, leaving the 5 target platforms |
| INFRA-03 | 01-03-PLAN.md | Scheduled CI builds against latest DuckDB; on failure opens PR mentioning @copilot | SATISFIED | `DuckDBVersionMonitor.yml` with weekly cron; `@copilot please update the DuckDB version pin` in breakage PR body; `continue-on-error: true` + `steps.build.outcome` pattern correct |
| INFRA-04 | 01-02-PLAN.md | CI includes LOAD smoke test (not just `cargo test`) to catch ABI version mismatches | SATISFIED | `test/sql/semantic_views.test` with `require semantic_views` directive; `CodeQuality.yml` runs this via `make test_debug` path |
| STYLE-01 | 01-01-PLAN.md | `rustfmt` configured with project-level `rustfmt.toml`; formatting violations fail CI | SATISFIED | `rustfmt.toml` exists; `CodeQuality.yml` runs `cargo fmt --check`; local check passes |
| STYLE-02 | 01-01-PLAN.md | `clippy` with pedantic lints enforced; lint violations fail CI | SATISFIED | `Cargo.toml` has `pedantic = { level = "deny", priority = -1 }`; `CodeQuality.yml` runs `cargo clippy -- -D warnings`; local check passes |

**Orphaned requirement check:** REQUIREMENTS.md Traceability table maps INFRA-01, INFRA-02, INFRA-03, INFRA-04, STYLE-01, STYLE-02 to Phase 1. All six are claimed in plan frontmatter. No orphans.

---

### Anti-Patterns Found

None. Scanned `src/`, `Cargo.toml`, `Justfile`, `.github/workflows/` for TODO/FIXME/XXX/HACK/PLACEHOLDER/placeholder/coming soon. Zero matches.

One observation that is NOT a blocker: the plan artifact `contains` patterns for the three CI workflow files ("PullRequestCI", "MainDistributionPipeline", "CodeQuality") do not literally appear as strings inside those files — the `name:` fields use human-readable names ("Pull Request CI", "Main Extension Distribution Pipeline", "Code Quality"). This is a plan documentation minor mismatch, not a code problem. The workflows are correct and complete.

---

### Human Verification Required

Three items cannot be verified programmatically:

#### 1. CI Workflows Execute Successfully on GitHub

**Test:** Push to a branch, open a PR, and observe the GitHub Actions tab.
**Expected:** PullRequestCI workflow starts and shows "Build and test (Linux x86_64)" passing. CodeQuality workflow shows all four steps (rustfmt, clippy, cargo-deny, coverage) green.
**Why human:** Reusable workflow resolution, secrets availability, and the full Rust toolchain download chain only execute in a live GitHub Actions environment. We cannot verify from a local file check that the `uses:` references resolve to callable workflows.

#### 2. SQLLogicTest LOAD Smoke Test Catches ABI Mismatches

**Test:** Build the extension, then run `make test_debug` from the project root.
**Expected:** The SQLLogicTest runner executes `test/sql/semantic_views.test`, the `require semantic_views` directive loads the built extension, and `SELECT 42` returns `42`.
**Why human:** The `make configure` step must have downloaded the pinned DuckDB binary locally (verified by the summary that it completed), but the actual LOAD test requires the full extension-ci-tools Python runner executing against the compiled `.duckdb_extension` binary. This can only be confirmed by running it.

#### 3. DuckDB Version Monitor Conditional PR Logic

**Test:** Manually trigger the `DuckDB Version Monitor` workflow from the GitHub Actions tab when a version newer than v1.4.4 exists; also trigger when already on latest.
**Expected:** New version found + build passes → clean PR titled "chore: bump DuckDB pin to vX.Y.Z". New version found + build fails → PR with "@copilot" in body. Already on latest → no PR, log message only.
**Why human:** The `workflow_dispatch` trigger and the `gh api` call to GitHub's releases API only execute in a live Actions environment. The conditional PR creation logic using `steps.build.outcome` can only be exercised end-to-end on GitHub.

---

### Gaps Summary

No gaps. All 15 observable truths verified. All 12 required artifacts are present, substantive, and wired. All 10 key links confirmed. All 6 requirement IDs satisfied. Zero blocker anti-patterns found. Three items flagged for human verification due to needing a live GitHub Actions environment — these are expected for CI infrastructure at scaffold phase.

---

_Verified: 2026-02-24_
_Verifier: Claude (gsd-verifier)_
