ci: enable Opus 5.5 with the upgraded bot engine

.github/actions/bot-prelude/action.yml

@@ -30,7 +30,7 @@ inputs:
     # value to move every bot to a new engine commit; never @main.
     description: 'Engine commit SHA (full 40-char) to install.'
     required: false
-    default: 'd45a3326a66b121eafa2b5c36489be172502e378'
+    default: 'ac3b08eab993ef14bf997a9bf4c776fa5acb16d8'
   engine-repo:
     description: 'owner/name of the engine repo.'
     required: false
@@ -83,7 +83,7 @@ runs:
     - name: Setup Node (for the Claude Code CLI the SDK spawns)
       uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020  # v7.0.0
       with:
-        node-version: '20'
+        node-version: '22'
 
     - name: Install engine + Claude SDK/CLI
       uses: ./.github/actions/install-bot-engine

.github/actions/install-bot-engine/action.yml

@@ -33,11 +33,11 @@ inputs:
   sdk-version:
     description: 'claude-agent-sdk version. Keep in sync with the engine at the pinned SHA.'
     required: false
-    default: '0.2.102'
+    default: '0.2.167'
   cli-version:
     description: '@anthropic-ai/claude-code version. Keep in sync with the engine at the pinned SHA.'
     required: false
-    default: '2.1.61'
+    default: '2.1.300'
 
 runs:
   using: composite

.github/workflows/engineer-bot-followup.yml

@@ -153,7 +153,8 @@ jobs:
           PR_TITLE: ${{ github.event.pull_request.title }}
           PR_URL: ${{ github.event.pull_request.html_url }}
           TRIGGER_COMMENT_ID: ${{ github.event.comment.id }}
-          MODEL_ENDPOINT: https://${{ secrets.DATABRICKS_HOST }}/serving-endpoints/databricks-claude-opus-4-8/invocations
+          ENGINEER_BOT_MODEL_OVERRIDE: databricks-claude-opus-5-5
+          MODEL_ENDPOINT: https://${{ secrets.DATABRICKS_HOST }}/serving-endpoints/databricks-claude-opus-5-5/invocations
           DATABRICKS_TOKEN: ${{ secrets.DATABRICKS_TOKEN }}
           RUNNER_TEMP: ${{ runner.temp }}
           # The agent's working tree AND the .bot/ lookup root. run.py resolves the

.github/workflows/engineer-bot-learning.yml

@@ -107,8 +107,9 @@ jobs:
           # translate_endpoint's already-v2 early-return, which keeps the trailing
           # `invocations`, so the CLI appends `/v1/messages` →
           # `.../anthropic/invocations/v1/messages` → HTTP 400 (unsupported path).
-          # The effective model is set by the engine default (no retrospective.model).
-          MODEL_ENDPOINT: https://${{ secrets.DATABRICKS_HOST }}/serving-endpoints/databricks-claude-opus-4-8/invocations
+          # The effective model is set by the override (no retrospective.model).
+          ENGINEER_BOT_MODEL_OVERRIDE: databricks-claude-opus-5-5
+          MODEL_ENDPOINT: https://${{ secrets.DATABRICKS_HOST }}/serving-endpoints/databricks-claude-opus-5-5/invocations
           DATABRICKS_TOKEN: ${{ secrets.DATABRICKS_TOKEN }}
           RUNNER_TEMP: ${{ runner.temp }}
           SINCE: ${{ inputs.since }}

.github/workflows/engineer-bot-mention.yml

@@ -159,7 +159,8 @@ jobs:
           GITHUB_REPOSITORY: ${{ github.repository }}
           ISSUE_NUMBER: ${{ github.event.issue.number }}
           TRIGGER_COMMENT_ID: ${{ github.event.comment.id }}
-          MODEL_ENDPOINT: https://${{ secrets.DATABRICKS_HOST }}/serving-endpoints/databricks-claude-opus-4-8/invocations
+          ENGINEER_BOT_MODEL_OVERRIDE: databricks-claude-opus-5-5
+          MODEL_ENDPOINT: https://${{ secrets.DATABRICKS_HOST }}/serving-endpoints/databricks-claude-opus-5-5/invocations
           DATABRICKS_TOKEN: ${{ secrets.DATABRICKS_TOKEN }}
           REPO_ROOT: ${{ github.workspace }}/pr
         run: |

.github/workflows/engineer-bot.yml

@@ -199,7 +199,8 @@ jobs:
         # checkout. --flow only when the ctx step derived one.
         working-directory: ${{ runner.temp }}
         env:
-          MODEL_ENDPOINT: https://${{ secrets.DATABRICKS_HOST }}/serving-endpoints/databricks-claude-opus-4-8/invocations
+          ENGINEER_BOT_MODEL_OVERRIDE: databricks-claude-opus-5-5
+          MODEL_ENDPOINT: https://${{ secrets.DATABRICKS_HOST }}/serving-endpoints/databricks-claude-opus-5-5/invocations
           DATABRICKS_TOKEN: ${{ secrets.DATABRICKS_TOKEN }}
           # Live-warehouse connection env for the agent's REQUIRED e2e repro
           # (pecoTestingCreds reads these). hostname/http-path are not

.github/workflows/reviewer-bot-followup.yml

@@ -89,7 +89,8 @@ jobs:
           TRIGGER_COMMENT_ID: ${{ github.event.comment.id }}
           HEAD_SHA: ${{ github.event.pull_request.head.sha }}
           PR_BASE_SHA: ${{ github.event.pull_request.base.sha }}
-          MODEL_ENDPOINT: https://${{ secrets.DATABRICKS_HOST }}/serving-endpoints/databricks-claude-opus-4-8/invocations
+          REVIEWER_BOT_MODEL_OVERRIDE: databricks-claude-opus-5-5
+          MODEL_ENDPOINT: https://${{ secrets.DATABRICKS_HOST }}/serving-endpoints/databricks-claude-opus-5-5/invocations
           DATABRICKS_TOKEN: ${{ secrets.DATABRICKS_TOKEN }}
           DRY_RUN: 'false'
           RUNNER_TEMP: ${{ runner.temp }}

.github/workflows/reviewer-bot.yml

@@ -124,7 +124,8 @@ jobs:
           PR_NUMBER: ${{ steps.inputs.outputs.pr_number }}
           HEAD_SHA: ${{ steps.inputs.outputs.head_sha }}
           DRY_RUN: ${{ steps.inputs.outputs.dry_run }}
-          MODEL_ENDPOINT: https://${{ secrets.DATABRICKS_HOST }}/serving-endpoints/databricks-claude-opus-4-8/invocations
+          REVIEWER_BOT_MODEL_OVERRIDE: databricks-claude-opus-5-5
+          MODEL_ENDPOINT: https://${{ secrets.DATABRICKS_HOST }}/serving-endpoints/databricks-claude-opus-5-5/invocations
           DATABRICKS_TOKEN: ${{ secrets.DATABRICKS_TOKEN }}
           RUNNER_TEMP: ${{ runner.temp }}
           # The reviewer's repo-specific ADDITIVE guidance, read from the TRUSTED