diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2ac4980..f3c457c9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,26 @@
 # Changelog
 
+## [0.15.5.0] - 2026-04-03 — Declarative Multi-Host Platform
+
+Adding a new coding agent to gstack used to mean touching 9 files and knowing the internals of `gen-skill-docs.ts`. Now it's one TypeScript config file and a re-export. Zero code changes elsewhere. Tests auto-parameterize.
+
+### Added
+
+- **Declarative host config system.** Every host is a typed `HostConfig` object in `hosts/*.ts`. The generator, setup, skill-check, platform-detect, uninstall, and worktree copy all consume configs instead of hardcoded switch statements. Adding a host = one file + re-export in `hosts/index.ts`.
+- **4 new hosts: OpenCode, Slate, Cursor, OpenClaw.** `bun run gen:skill-docs --host all` now generates for 8 hosts. Each produces valid SKILL.md output with zero `.claude/skills` path leakage.
+- **OpenClaw adapter.** OpenClaw gets a hybrid approach: config for paths/frontmatter/detection + a post-processing adapter for semantic tool mapping (Bash→exec, Agent→sessions_spawn, AskUserQuestion→prose). Includes `SOUL.md` via `staticFiles` config.
+- **106 new tests.** 71 tests for config validation, HOST_PATHS derivation, export CLI, golden-file regression, and per-host correctness. 35 parameterized smoke tests covering all 7 external hosts (output exists, no path leakage, frontmatter valid, freshness, skip rules).
+- **`host-config-export.ts` CLI.** Exposes host configs to bash scripts via `list`, `get`, `detect`, `validate`, `symlinks` commands. No YAML parsing needed in bash.
+- **Contributor `/gstack-contrib-add-host` skill.** Guides new host config creation. Lives in `contrib/`, excluded from user installs.
+- **Golden-file baselines.** Snapshots of ship/SKILL.md for Claude, Codex, and Factory verify the refactor produces identical output.
+
+### Changed
+
+- **`gen-skill-docs.ts` is now config-driven.** EXTERNAL_HOST_CONFIG, transformFrontmatter host branches, path/tool rewrite if-chains, ALL_HOSTS array, and skill skip logic all replaced with config lookups.
+- **`types.ts` derives Host type from configs.** No more hardcoded `'claude' | 'codex' | 'factory'`. HOST_PATHS built dynamically from each config's globalRoot/usesEnvVars.
+- **Preamble, co-author trailer, resolver suppression all read from config.** hostConfigDir, co-author strings, and suppressedResolvers driven by host configs instead of per-host switch statements.
+- **`skill-check.ts`, `worktree.ts`, `platform-detect` iterate configs.** No per-host blocks to maintain.
+
 ## [0.15.4.0] - 2026-04-03 — Autoplan DX Integration + Docs
 
 `/autoplan` now auto-detects developer-facing plans and runs `/plan-devex-review` as Phase 3.5, with full dual-voice adversarial review (Claude subagent + Codex). If your plan mentions APIs, CLIs, SDKs, agent actions, or anything developers integrate with, the DX review kicks in automatically. No extra commands needed.
diff --git a/VERSION b/VERSION
index 01f4ab54..12908414 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.15.4.0
+0.15.5.0
diff --git a/package.json b/package.json
index 748116e7..ad744304 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "gstack",
-  "version": "0.15.4.0",
+  "version": "0.15.5.0",
   "description": "Garry's Stack — Claude Code skills + fast headless browser. One repo, one install, entire AI engineering workflow.",
   "license": "MIT",
   "type": "module",