diff --git a/.prettierignore b/.prettierignore
index 19b0b9f..15dc688 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -4,3 +4,4 @@ playwright-report/
 test-results/
 .astro/
 src/data/portfolio.generated.json
+CHANGELOG.md
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 466df71..37fcefa 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.1.0"
+  ".": "1.0.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5661091..49b2a59 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1 +1,19 @@
+# Changelog
+
+## [1.0.0](https://github.com/dev-zetta/dev-zetta.github.io/releases/tag/v1.0.0) (2026-08-29)
+
+
+### ⚠ BREAKING CHANGES
+
+* establish the initial public portfolio and release contract.
+
+### Features
+
+* launch versioned engineering portfolio ([6d59d59](https://github.com/dev-zetta/dev-zetta.github.io/commit/6d59d59e923acb5343f47ce5ab661fe25b4f7d5d))
+
+
+### Bug Fixes
+
+* **ci:** use root SemVer release tags ([d163a8a](https://github.com/dev-zetta/dev-zetta.github.io/commit/d163a8ae0ff98a75ffd8f17ebb20dc3285040e34))
+
 <!-- Managed by Release Please. -->
diff --git a/package-lock.json b/package-lock.json
index 018e4fb..1a31eb0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "dev-zetta-portfolio",
-  "version": "0.1.0",
+  "version": "1.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "dev-zetta-portfolio",
-      "version": "0.1.0",
+      "version": "1.0.0",
       "dependencies": {
         "astro": "7.2.9",
         "zod": "4.5.2"
diff --git a/package.json b/package.json
index eaf3606..1b28429 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "dev-zetta-portfolio",
-  "version": "0.1.0",
+  "version": "1.0.0",
   "private": true,
   "type": "module",
   "description": "Versioned, commit-verified engineering portfolio for Gabriel Max.",