Complete DriftGuard v0.3 launch readiness

[sidsri14]

What changed

• adds stable JSON check output and driftguard doctor
• adds project-wide and comment-only line suppressions
• rejects missing manifests and invalid globs during runtime preflight
• replaces placeholder prompt mappings with an intentional env-only default
• adds a production-path benchmark, demo scripts, and a portfolio case study
• adds Linux, macOS, and Windows quality CI plus structured pilot feedback
• updates package metadata to v0.3.0 and launch documentation

Why

Public-repository onboarding trials exposed missing-manifest ambiguity, noisy placeholder prompt contracts, and the need for narrow suppression controls. This release closes those gaps while keeping execution local and deterministic.

Developer impact

Consumers get versioned machine output, clearer setup diagnostics, lower false-positive friction, and cross-platform validation. Existing terminal and Markdown check flows remain supported.

Validation

• cargo fmt --check
• cargo test --locked (26 tests)
• cargo clippy --all-targets --all-features --locked -- -D warnings
• cargo run -- check --since origin/main --env-scope changed --json
• cargo bench --bench env_scan
• cargo publish --dry-run --allow-dirty
• local cargo install --path . --locked
• PowerShell pass/fail demo

Release note

Actual crates.io publication still requires a locally configured crates.io token; no credential is stored in this repository.

[github-actions]

DriftGuard Report

Verdict: Passed