v0.3.1

Fixed

• Guard history timestamp conversion in Claude and Codex parsers against out-of-range finite
  values so malformed records are skipped without crashing scanning.
• Surface skill validation warnings in interactive output and report agnix validation failures
  as structured validation errors without throwing.
• Add integration coverage for local fallback generation, ecosystem mirroring, single-target writes, and overwrite-denial.
• Add CLI help output for --help, -h, and help.
• Emit prompt-dump source summaries and non-info diagnostics to stderr, keeping prompt rows on stdout.
• Show interactive history warning diagnostics from discovery and scanning so malformed records and skipped files are visible before ranking.
• Ask for extra history sources even when defaults are already discovered, and merge extra scans without dropping defaults.
• Continue history discovery when one source directory cannot be traversed.
• Install SIGINT/SIGTERM handlers only once in the CLI runtime.
• Enforce selected skill name validation so generated SKILL.md names must match the chosen skill target.
• Restore invalid primary skill writes by removing newly created targets or restoring overwritten targets after validation failure.
• Add unit coverage for release note extraction CLI behavior, including missing sections and empty release entries.