Add quality-matrix implementation to pdftract-ci with msrv-check step
using rust:1.78-slim to detect usage of newer Rust features.
Changes:
- .ci/argo-workflows/pdftract-ci.yaml: Implement quality-matrix DAG with
msrv-check, clippy-fmt, and cargo-audit templates
- CHANGELOG.md: New file documenting MSRV bump policy (MINOR version
event, warning period, update checklist)
The MSRV gate prevents silent drift that would break downstream consumers
on older toolchains. Any Rust 1.79+ feature (e.g., let-else, core::error::Error)
will fail the msrv-check step, triggering a policy review.
See notes/pdftract-2w02.md for acceptance criteria verification.
Co-Authored-By: Claude Code <noreply@anthropic.com>
Add MSRV (Minimum Supported Rust Version) pinning to 1.78 for
pdftract-core and pdftract-cli. The MSRV gate prevents silent
absorption of newer Rust features that would break downstream
consumers on older toolchains.
Changes:
- CI: Add quality-matrix DAG with msrv-check step (rust:1.78-slim)
- CI: Add clippy-check, fmt-check, cargo-audit, cargo-deny templates
- README: Add MSRV badge (shields.io)
- clippy.toml: Enable msrv=1.78 for MSRV-aware lints
- CONTRIBUTING.md: Document MSRV bump policy (MINOR version event)
The rust-version was already declared in workspace Cargo.toml;
this bead adds the CI enforcement and documentation.
Refs: pdftract-2w02
