diff --git a/.agents/plugins/marketplace.json b/.agents/plugins/marketplace.json
new file mode 100644
index 0000000..e3df808
--- /dev/null
+++ b/.agents/plugins/marketplace.json
@@ -0,0 +1,20 @@
+{
+  "name": "robobryce-agitentic",
+  "interface": {
+    "displayName": "Agitentic"
+  },
+  "plugins": [
+    {
+      "name": "agitentic",
+      "source": {
+        "source": "local",
+        "path": "./plugins/agitentic"
+      },
+      "policy": {
+        "installation": "AVAILABLE",
+        "authentication": "ON_INSTALL"
+      },
+      "category": "Coding"
+    }
+  ]
+}
diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index c22c8d5..d87e609 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -7,7 +7,7 @@
     {
       "name": "agitentic",
       "source": "./plugins/agitentic",
-      "description": "Agentic git/GitHub helpers as agentskills.io-compliant skills. Ships `agitentic:git-fork`, `agitentic:git-sync`, and `agitentic:git-create`."
+      "description": "Agentic git/GitHub helpers as agentskills.io-compliant skills. Ships `agitentic:git-fork`, `agitentic:git-clone`, `agitentic:git-sync`, and `agitentic:git-create`."
     }
   ]
 }
diff --git a/README.md b/README.md
index 63df8ba..01f693d 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 Git skills for coding agents.
 They are [agentskills.io](https://agentskills.io)-compliant and
-shipped as a Claude Code plugin.
+shipped as an agent plugin for Claude Code, Codex, and Agent Skills-compatible harnesses.
 
 ## Skills
 
@@ -24,16 +24,25 @@ Each skill lives under `plugins/agitentic/skills/<name>/` and is a
 self-contained agentskills.io skill (`SKILL.md` + a `scripts/`
 directory).
 
-## Install (Claude Code)
+## Install
 
-The repo is a Claude Code plugin marketplace. Install via:
+Claude Code:
 
 ```
-/plugin marketplace add robobryce/agitentic
+/plugin marketplace add brycelelbach/agitentic
 /plugin install agitentic@robobryce-agitentic
 ```
 
-Then invoke a skill by name, e.g. `/agitentic:git-fork`.
+Codex:
+
+```bash
+codex plugin marketplace add brycelelbach/agitentic
+codex plugin add agitentic@robobryce-agitentic
+```
+
+Other Agent Skills-compatible harnesses can install from the plugin payload at `plugins/agitentic/` or from the individual skill directories under `plugins/agitentic/skills/`.
+
+Invoke a skill using your host's skill syntax. In Claude Code, use `/agitentic:git-fork`; in Codex, use `$agitentic git-fork`.
 
 ## Use the scripts directly (no plugin)
 
@@ -208,12 +217,16 @@ The following must be in your `$PATH`:
 ## Project structure
 
 ```
+.agents/plugins/
+  marketplace.json           - Codex and agent marketplace manifest
 .claude-plugin/
   marketplace.json           - Claude Code plugin marketplace manifest
 plugins/
   agitentic/
     .claude-plugin/
-      plugin.json            - Plugin manifest
+      plugin.json            - Claude Code plugin manifest
+    .codex-plugin/
+      plugin.json            - Codex plugin manifest
     skills/
       ${SKILL}/              - An individual skill
         SKILL.md             - agentskills.io skill (metadata + instructions)
diff --git a/plugins/agitentic/.codex-plugin/plugin.json b/plugins/agitentic/.codex-plugin/plugin.json
new file mode 100644
index 0000000..bb2ab9f
--- /dev/null
+++ b/plugins/agitentic/.codex-plugin/plugin.json
@@ -0,0 +1,38 @@
+{
+  "name": "agitentic",
+  "version": "0.3.0",
+  "description": "Agentic git and GitHub helpers for fork, clone, sync, and repository creation workflows.",
+  "author": {
+    "name": "Bryce Lelbach",
+    "url": "https://github.com/brycelelbach"
+  },
+  "homepage": "https://github.com/brycelelbach/agitentic",
+  "repository": "https://github.com/brycelelbach/agitentic",
+  "license": "Apache-2.0 WITH LLVM-exception",
+  "keywords": [
+    "git",
+    "github",
+    "fork",
+    "agent-skills",
+    "coding"
+  ],
+  "skills": "./skills/",
+  "interface": {
+    "displayName": "Agitentic",
+    "shortDescription": "Git and GitHub contributor workflow skills.",
+    "longDescription": "Agitentic packages reusable agent skills for creating contributor clones, wiring upstream and fork remotes, syncing forks to upstream, and creating new GitHub repositories with standard settings.",
+    "developerName": "Bryce Lelbach",
+    "category": "Coding",
+    "capabilities": [
+      "Interactive",
+      "Read",
+      "Write"
+    ],
+    "defaultPrompt": [
+      "Fork this repository and wire upstream and fork remotes.",
+      "Sync my fork with upstream.",
+      "Create a new GitHub repository."
+    ],
+    "websiteURL": "https://github.com/brycelelbach/agitentic"
+  }
+}
diff --git a/test.bash b/test.bash
index a079f09..736e136 100755
--- a/test.bash
+++ b/test.bash
@@ -76,15 +76,24 @@ run_lint() {
     (( fail == 0 )) || return 1
 
     echo "--- plugin / marketplace manifests ---"
-    for f in .claude-plugin/marketplace.json plugins/*/.claude-plugin/plugin.json; do
+    for f in \
+        .agents/plugins/marketplace.json \
+        .claude-plugin/marketplace.json \
+        plugins/*/.claude-plugin/plugin.json \
+        plugins/*/.codex-plugin/plugin.json; do
         echo "==> jq . $f"
         jq -e . "$f" >/dev/null
     done
     jq -e '.name and .owner.name and (.plugins | type == "array" and length > 0)' \
         .claude-plugin/marketplace.json >/dev/null
+    jq -e '.name and .interface.displayName and (.plugins | type == "array" and length > 0) and (.plugins[] | .name and .source.source == "local" and .source.path and .policy.installation and .policy.authentication and .category)' \
+        .agents/plugins/marketplace.json >/dev/null
     for f in plugins/*/.claude-plugin/plugin.json; do
         jq -e '.name and .version and .description' "$f" >/dev/null
     done
+    for f in plugins/*/.codex-plugin/plugin.json; do
+        jq -e '.name and .version and .description and .skills == "./skills/"' "$f" >/dev/null
+    done
 
     echo "--- agentskills.io skills ---"
     python3 .github/validate_skills.py