[REGRESSION] v2.1.185: Reduced reasoning on routine actions breaks planning autonomy
Status Fixed / completed
Reported on v2.1.185
Maintainer reply None cached
Activity 4 comments · opened Jun 22, 2026 · closed Jun 24, 2026
Summary
Claude Code v2.1.185 (released 2026-06-20) introduced "improved auto mode classifier latency by reducing reasoning on routine actions" which appears to have systematically degraded planning and architecture reasoning across all complex engineering workflows.
Observed Behavior
- Before v2.1.185: Claude agents consistently discovered existing code patterns, read architecture before coding, performed data-layer-first planning
- After v2.1.185: Claude agents skip architecture discovery, invent duplicate solutions, skip data layer planning, trial-and-error without pausing for reflection
- Scope: Affects all sessions, all domains, all complex tasks
Metrics
Comparable tasks (TKP 7940 vs TKP 8011):
- Pattern reuse: 4 → 0
- Files modified (existing codebase): 6 → 1
- Commits spacing: days → 11 minutes
- Autonomy score: 0.85 → 0.15
Request
Revert or toggle the "reduced reasoning on routine actions" optimization in v2.1.185. Restore full reasoning on planning-phase actions (codebase exploration, architecture reading, reflection).
Session
- Version: 2.1.185
- Observed: 2026-06-19 to 2026-06-22
- Impact: 100% of sessions
4 Comments
Found 1 possible duplicate issue:
This issue will be automatically closed as a duplicate in 3 days.
🤖 Generated with Claude Code
This is still true for version v2.1.186
Hi, I close this bug since I was indeed on HAIKU.
Sorry.
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