chore: bump version and changelog (v0.15.2.0)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CHANGELOG.md

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 # Changelog
 
+## [0.15.2.0] - 2026-04-01 — Smarter Reviews
+
+Code reviews now learn from your decisions. Skip a finding once and it stays quiet until the code changes. Specialists auto-suggest test stubs alongside their findings. And silent specialists that never find anything get auto-gated so reviews stay fast.
+
+### Added
+
+- **Cross-review finding dedup.** When you skip a finding in one review, gstack remembers. On the next review, if the relevant code hasn't changed, the finding stays suppressed. No more re-skipping the same intentional pattern every PR.
+- **Test stub suggestions.** Specialists can now include a skeleton test alongside each finding. The test uses your project's detected framework (Jest, Vitest, RSpec, pytest, Go test). Findings with test stubs get surfaced as ASK items so you decide whether to create the test.
+- **Adaptive specialist gating.** Specialists that have been dispatched 10+ times with zero findings get auto-gated. Security and data-migration are exempt (insurance policies always run). Force any specialist back with `--security`, `--performance`, etc.
+- **Per-specialist stats in review log.** Every review now records which specialists ran, how many findings each produced, and which were skipped or gated. This powers the adaptive gating and gives /retro richer data.
+
 ## [0.15.1.0] - 2026-04-01 — Design Without Shotgun
 
 You can now run `/design-html` without having to run `/design-shotgun` first. The skill detects what design context exists (CEO plans, design review artifacts, approved mockups) and asks how you want to proceed. Start from a plan, a description, or a provided PNG, not just an approved mockup.

VERSION

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-0.15.1.0
+0.15.2.0