# Checkpoint 2 — Implementation and Validation Closure

**Date:** 2026-05-12  
**Spec:** 0.6.3 Rust-first test migration requirements/design/tasks package  
**Task:** Implementation closure and local CI-equivalent convergence

## Checkpoint Name

Checkpoint 2: implementation completion + validation closure.

## Completed Work

- Fixed `clippy -D warnings` issues in `tools/e2e-harness`:
  - removed unit-value `let` binding in `src/cli.rs`
  - collapsed nested `if` in `src/fixtures/http_backend.rs`
- Fixed proxy TLS E2E HEAD behavior drift in
  `tools/e2e/verify_proxy_tls_backend_e2e.sh` by replacing `curl --head` with
  `curl -X HEAD` for deterministic artifact capture.
- Aligned config-merge E2E script with current runtime directive/value and
  behavior in `tools/e2e/verify_config_merge_e2e.sh`:
  - `markdown_conditional_requests disabled`
  - `markdown_flavor gfm`
  - assertions updated to match observed size-gate and malformed-input runtime
    semantics.
- Added/kept harness contract alignment checks and migration docs updates in the
  working tree (harness/docs/spec-review artifacts for 0.6.3).

## Validation Result

Passed locally in current working tree:

- `make docs-check`
- `make harness-check`
- `make harness-check-full`
- `cd tools/e2e-harness && cargo fmt -- --check`
- `cd tools/e2e-harness && cargo clippy --all-targets --all-features -- -D warnings`
- `cd tools/e2e-harness && cargo test --all-features`
- `make test-e2e-rust`
- `make test-e2e`
- `cargo fmt --manifest-path components/rust-converter/Cargo.toml --all -- --check`
- `cargo clippy --manifest-path components/rust-converter/Cargo.toml --all-targets --all-features -- -D warnings`
- `make test-rust`

Notes:

- `cargo fmt --all -- --check` at repo root is not applicable because the
  repository has no top-level `Cargo.toml`; manifest-scoped checks were used.
- `make harness-check-full` completed with non-blocking warnings from security
  helper scans (`PASS with warnings`), consistent with current gate policy.

## Remaining Blockers

- No known failing local gate remains for the migration-related scope.
- Final delivery actions are pending:
  - produce pre-commit convergence summary
  - create migration-only commit
  - push only if explicitly approved after final review
