Changes in version 0.2.1 (2026-07-16)                  

CRAN resubmission fixes

  - Removed "for R" from the package description
  - Package names now in single quotes in DESCRIPTION ('shiny',
    'SHA-256')
  - Shiny examples wrapped in if(interactive()){} per CRAN policy

                        Changes in version 0.2.0                        

New functions

  - log_note() — log a free-text annotation or analytical decision as a
    tamper-evident NOTE entry. Mandatory-reason enforced and included in
    the hash chain.
  - log_signature() — apply an electronic signature per 21 CFR Part 11
    §11.100/§11.200. Signer identity is resolved from the session user;
    entries covered is captured automatically.
  - filter_log() — query log entries as a data.frame by type, user,
    action, or date range. Works directly on .rlog file paths without an
    active session.
  - as.data.frame.regulog() — S3 method to convert a regulog object to a
    flat data frame, one row per entry (genesis record excluded).
  - rl_read() — explicit, logged read of any data source. Records the
    reader function, resolved file path, row count, and column count as
    a data_read ACTION entry. Path is resolved by argument name (file,
    path, data_file, input), falling back to the first unnamed argument
    — correct even when arguments are supplied out of position.
  - with_log() — scoped logging for a code block. Provides a local
    read() binding tied to the supplied log. Each call is isolated via
    lexical scope — concurrent calls across Shiny sessions never
    interfere, and errors inside the block propagate normally without
    corrupting previously logged entries.

Validation

  - IQ/OQ/PQ qualification scripts updated to v0.2:
      - OQ-015 to OQ-024c: tests for log_note(), log_signature(),
        filter_log(), as.data.frame.regulog(), rl_read(), and
        with_log(), including concurrent-session isolation
      - PQ-006: annotated clinical analysis workflow with notes and
        signature
      - PQ-007: regulatory inspector query workflow using filter_log()
  - RTM extended with rows covering 21 CFR Part 11 §11.100/§11.200,
    annotation trail, data read logging, and audit trail query
    interface.

Documentation

  - Package-level documentation with complete workflow, entry type
    reference, and regulatory coverage table.
  - Three vignettes: getting-started, hash-chain, shiny-integration.

                        Changes in version 0.1.0                        

  - Initial release.
  - regulog_init(), log_action(), log_change() — core audit logging.
  - verify_log() — SHA-256 hash chain verification.
  - export_audit_trail() — CSV and JSON export with optional signing.
  - regulog_shiny_init(), regulog_observer() — Shiny integration.
  - IQ/OQ/PQ validation suite (IQ-001–009, OQ-001–014, PQ-001–005).