Two issues prevented diagnostics from reliably appearing in Full mode:
1. The analysis prompt asked for "root cause of recurring patterns" which
is too vague for early sessions with no history. Now adapts: simple
per-run analysis when no session history exists, pattern analysis when
history is available.
2. When the LLM fails or produces empty output after thinking-token
stripping, analysis was silently "" and nothing was stored. Added a
rule-based fallback that builds a diagnostic from axis_feedback
(regressed/missing/wrong axes) so the history always accumulates
even when the LLM produces nothing useful.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
