Lift drill into evals/ at 013fcb8b7dbefd6d3fa4653493e5d2ec8e7f985b

rsync of obra/drill@013fcb8b7d into superpowers/evals/, excluding
.git/, .venv/, results/, .env/, __pycache__/, *.egg-info/,
.private-journal/.

The drill repo is unaffected by this commit; archival is a separate
manual step after this PR merges.

Source SHA recorded at evals/.drill-source-sha for divergence
detection.

evals/backends/gemini.yaml

@@ -0,0 +1,24 @@
+name: gemini
+cli: gemini
+args:
+  - "--yolo"
+  - "-m"
+  - "gemini-2.5-flash"
+required_env:
+  - SUPERPOWERS_ROOT
+hooks:
+  pre_run:
+    - link_gemini_extension
+  post_run: []
+shutdown: "/exit"
+idle:
+  quiescence_seconds: 5
+  ready_pattern: "Type your message|^\\s*>"
+busy_pattern: "Thinking\\.\\.\\.|Executing"
+startup_timeout: 60
+turn_timeout: 300
+terminal:
+  cols: 200
+  rows: 50
+session_logs:
+  pattern: "~/.gemini/tmp/*/chats/session-*.json"