chore: resolve merge conflict in CHANGELOG.md, bump to v0.15.6.0

Main claimed v0.15.5.0 for DX review. Our multi-host platform gets
v0.15.6.0. Both entries preserved, contiguous version sequence.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

README.md

@@ -196,7 +196,7 @@ Each skill feeds into the next. `/office-hours` writes a design doc that `/plan-
 | `/plan-ceo-review` | **CEO / Founder** | Rethink the problem. Find the 10-star product hiding inside the request. Four modes: Expansion, Selective Expansion, Hold Scope, Reduction. |
 | `/plan-eng-review` | **Eng Manager** | Lock in architecture, data flow, diagrams, edge cases, and tests. Forces hidden assumptions into the open. |
 | `/plan-design-review` | **Senior Designer** | Rates each design dimension 0-10, explains what a 10 looks like, then edits the plan to get there. AI Slop detection. Interactive — one AskUserQuestion per design choice. |
-| `/plan-devex-review` | **Developer Experience Lead** | Evaluates plans through Addy Osmani's DX framework: zero friction, learn by doing, fight uncertainty. Rates 8 DX dimensions 0-10 with a DX Scorecard. Use for developer-facing products — APIs, CLIs, SDKs, libraries, platforms, docs. |
+| `/plan-devex-review` | **Developer Experience Lead** | Interactive DX review: explores developer personas, benchmarks against competitors' TTHW, designs your magical moment, traces friction points step by step. Three modes: DX EXPANSION, DX POLISH, DX TRIAGE. 20-45 forcing questions. |
 | `/design-consultation` | **Design Partner** | Build a complete design system from scratch. Researches the landscape, proposes creative risks, generates realistic product mockups. |
 | `/review` | **Staff Engineer** | Find the bugs that pass CI but blow up in production. Auto-fixes the obvious ones. Flags completeness gaps. |
 | `/investigate` | **Debugger** | Systematic root-cause debugging. Iron Law: no fixes without investigation. Traces data flow, tests hypotheses, stops after 3 failed fixes. |