fix: address review findings for PR A

- Fix docs/antigravity.md: remove broken repository object format,
  use comment noting chart auto-resolves (覺渡+普渡+口渡 finding)
- Add helm unit test for agentImage unified tag format (Z渡+口渡 finding):
  kiro default, non-kiro suffix, tag override, explicit image override

Author: chaodu-agent

charts/openab/tests/agent-image_test.yaml

@@ -0,0 +1,53 @@
+suite: agentImage unified tag format
+templates:
+  - templates/deployment.yaml
+
+tests:
+  - it: kiro (default) resolves to openab:<appVersion> with no agent suffix
+    asserts:
+      - equal:
+          path: spec.template.spec.containers[0].image
+          value: "ghcr.io/openabdev/openab:0.9.0-beta.1"
+
+  - it: non-kiro agent resolves to openab:<appVersion>-<agent>
+    set:
+      agents.claude.command: claude-agent-acp
+    documentIndex: 1
+    asserts:
+      - equal:
+          path: spec.template.spec.containers[0].image
+          value: "ghcr.io/openabdev/openab:0.9.0-beta.1-claude"
+
+  - it: image.tag override applies to kiro
+    set:
+      image.tag: "beta"
+    asserts:
+      - equal:
+          path: spec.template.spec.containers[0].image
+          value: "ghcr.io/openabdev/openab:beta"
+
+  - it: image.tag override applies to non-kiro agent with suffix
+    set:
+      image.tag: "beta"
+      agents.codex.command: codex-acp
+    documentIndex: 1
+    asserts:
+      - equal:
+          path: spec.template.spec.containers[0].image
+          value: "ghcr.io/openabdev/openab:beta-codex"
+
+  - it: explicit per-agent image string with tag is used verbatim
+    set:
+      agents.kiro.image: "ghcr.io/custom/image:v1.0"
+    asserts:
+      - equal:
+          path: spec.template.spec.containers[0].image
+          value: "ghcr.io/custom/image:v1.0"
+
+  - it: explicit per-agent image string without tag gets appVersion appended
+    set:
+      agents.kiro.image: "ghcr.io/custom/image"
+    asserts:
+      - equal:
+          path: spec.template.spec.containers[0].image
+          value: "ghcr.io/custom/image:0.9.0-beta.1"

docs/antigravity.md

@@ -68,9 +68,7 @@ agents:
       command: "agy-acp"
       args: []
       workingDir: "/home/agent"
-    image:
-      repository: ghcr.io/openabdev/openab:beta-antigravity
-      tag: "latest"
+    # image: leave empty — chart auto-resolves to openab:<tag>-antigravity
 ```
 
 ## Limitations