go-s7comm v0.7.4

Date: 2026-07-30
Previous release: v0.7.3

Summary

Patch release: document logger and accurate context-cancel behaviour, add a thin
slog adapter, bump go-cotp to v1.0.3, root/model package docs, and raise
client test coverage. No S7 protocol or result-model changes.

Changes

Added

• client.NewSlogLogger — adapts slog.Handler to the existing printf-style Logger (nil handler → no-op).
• OBSERVABILITY.md — silent-by-default logging, sync callback cost, slog adapter; no metrics surface.
• doc.go (module root, package s7comm) — points pkg.go.dev / importers at client, model, and wire.
• model/doc.go — package overview for areas, addresses, device/connection info, and codec wrappers.

Changed

• Context docs (README, ERRORS.md, API.md) — cancel without deadline is effective on dial/TSDU via go-cotp but typically aborts the session; WithTimeout bounds Connect, not later PDUs; document UploadBlock cleanup context.
• Logger / WithLogger godoc — nil default, printf-style args, synchronous request-path cost.
• Connect logging — Error("Connect failed: %v", err) so the error is formatted correctly.
• README — Project structure tree (packages + docs); replaces the late bullet-only package list.
• README badges — Added pkg.go.dev; normalized Go 1.23%2B and Codecov link to codecov.io/gh/....

Dependencies

• go-cotp — v1.0.2 → v1.0.3 (docs-only upstream release).

License & open-source hygiene

• LICENSE — Added root MIT license (Copyright (c) 2026 OT Fabric).
• SPDX headers — Added // SPDX-License-Identifier: MIT to all first-party .go files (build tags preserved on interop/).
• README — License section pointing at LICENSE.

Build / tooling

• Makefile — exports GOWORK=off.
• Tests — client package coverage raised above 85% (ListBlocks/GetBlockInfo, probeS7, autoConnect, SZL edges, PDU-ref mismatch, range-probe mixed results).

Unchanged

• No change to ReadResult / ReadStatus, wire codecs, or cancel implementation (docs corrected to match go-cotp behaviour).