diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index dd8fde7..0d1bebe 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.5.0"
+  ".": "1.6.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0233e66..31a4753 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,28 @@
 # Changelog
 
+## [1.6.0](https://github.com/tokentopapp/plugin-sdk/compare/v1.5.0...v1.6.0) (2026-04-06)
+
+
+### Features
+
+* add estimatedDaily/estimatedMonthly to ProviderUsageData cost ([87036d5](https://github.com/tokentopapp/plugin-sdk/commit/87036d521671243f6f51576e566013b84f546ee8))
+* add longContext tiered rate fields to ModelPricing ([1b2d9a8](https://github.com/tokentopapp/plugin-sdk/commit/1b2d9a8beb26f9a24646018cd2c1fe26fea195e0))
+* add optional header title split colors and make family optional ([cd1075b](https://github.com/tokentopapp/plugin-sdk/commit/cd1075b08286ab4e22b6d401e934097cddf741e4))
+* add optional metadata field to SessionUsageData ([985fdc2](https://github.com/tokentopapp/plugin-sdk/commit/985fdc24325338c40dec3f849aa78cbda80f6893))
+* add rateLimited and retryAfterMs to ProviderUsageData ([07e4750](https://github.com/tokentopapp/plugin-sdk/commit/07e47502173a3ff3de149112eef70d9d952e73b1))
+* align theme types with core — flat ThemePlugin, ColorScheme exports ([c3b856b](https://github.com/tokentopapp/plugin-sdk/commit/c3b856b537dd720cf01d9d5041bc20e5b80976bd))
+* initial plugin-sdk scaffolding ([7960c97](https://github.com/tokentopapp/plugin-sdk/commit/7960c977f14c48e52a03a1c41782de15d2b08c87))
+
+
+### Bug Fixes
+
+* add bootstrap-sha to prevent stale changelog entries ([e654aad](https://github.com/tokentopapp/plugin-sdk/commit/e654aadad24efbecff3f5ebde646ba819605ad04))
+* add providerAliases to PluginMeta for cross-ID resolution ([87eaa2f](https://github.com/tokentopapp/plugin-sdk/commit/87eaa2f1e4d34a1ec8796e5a62e708ce8a5530a0))
+* add publishConfig.access public for scoped npm package ([cf31c46](https://github.com/tokentopapp/plugin-sdk/commit/cf31c461ca28d9e6830467b14367f04604946323))
+* drop --splitting from build to avoid bun duplicate export bug and align agent types ([845d068](https://github.com/tokentopapp/plugin-sdk/commit/845d068b782a2ded8207a2676a9bfa96a418a319))
+* set npm publish access to public for scoped package ([75169ba](https://github.com/tokentopapp/plugin-sdk/commit/75169ba6b8a166b88ad9449ecddae30ab1ca6fda))
+* update tests and docs for name on BasePlugin ([cd828fa](https://github.com/tokentopapp/plugin-sdk/commit/cd828fa1833464fda063d2c24afb6790a501265e))
+
 ## [1.5.0](https://github.com/tokentopapp/plugin-sdk/compare/v1.4.0...v1.5.0) (2026-04-06)
 
 
diff --git a/package.json b/package.json
index 71c628a..0640823 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tokentop/plugin-sdk",
-  "version": "1.5.0",
+  "version": "1.6.0",
   "description": "SDK for building tokentop plugins — providers, agents, themes, and notifications",
   "type": "module",
   "main": "dist/index.js",