reduce CI token costs: 1x/day schedule, Haiku for sub-agents, no retries

- evolve.yml: cron 3x/day → 1x/day at 4am UTC; remove both retry steps
- evolve.sh: add FAST_MODEL (Haiku); use it for build-fix, journal, and issue-response agents

Author: Test User

.github/workflows/evolve.yml

@@ -2,7 +2,7 @@ name: Evolution
 
 on:
   schedule:
-    - cron: '0 */8 * * *'  # every 8 hours
+    - cron: '0 4 * * *'    # once per day at 4am UTC
   workflow_dispatch:       # manual trigger
 
 permissions:
@@ -55,28 +55,3 @@ jobs:
           chmod +x scripts/evolve.sh
           ./scripts/evolve.sh
 
-      - name: Retry after 15min
-        id: attempt2
-        if: steps.attempt1.outcome == 'failure'
-        continue-on-error: true
-        env:
-          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
-          REPO: ${{ github.repository }}
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          FORCE_RUN: ${{ github.event_name == 'workflow_dispatch' && 'true' || '' }}
-        run: |
-          echo "Waiting 15 minutes before retry..."
-          sleep 900
-          ./scripts/evolve.sh
-
-      - name: Retry after 45min
-        if: steps.attempt1.outcome == 'failure' && steps.attempt2.outcome == 'failure'
-        env:
-          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
-          REPO: ${{ github.repository }}
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          FORCE_RUN: ${{ github.event_name == 'workflow_dispatch' && 'true' || '' }}
-        run: |
-          echo "Waiting 45 minutes before retry..."
-          sleep 2700
-          ./scripts/evolve.sh

scripts/evolve.sh

@@ -30,6 +30,7 @@ fi
 # ── Configuration ──
 REPO="${REPO:-$(git remote get-url origin 2>/dev/null | sed 's|.*github.com[:/]||;s|\.git$||' || echo "owner/code-evolve")}"
 MODEL="${MODEL:-claude-sonnet-4-6}"
+FAST_MODEL="${FAST_MODEL:-claude-haiku-4-5-20251001}"
 TIMEOUT="${TIMEOUT:-3600}"
 PROJECT_DIR="${PROJECT_DIR:-src}"
 BIRTH_DATE="${BIRTH_DATE:-$(date +%Y-%m-%d)}"
@@ -514,7 +515,7 @@ Steps:
 3. Run the verification commands and keep fixing until they pass
 4. Commit: git add -A && git commit -m "Day $DAY ($SESSION_TIME): fix build errors"
 FIXEOF
-            ${TIMEOUT_CMD:+$TIMEOUT_CMD 300} claude -p --model "$MODEL" \
+            ${TIMEOUT_CMD:+$TIMEOUT_CMD 300} claude -p --model "$FAST_MODEL" \
                 --allowedTools "Bash,Read,Write,Edit,Glob,Grep" \
                 < "$FIX_PROMPT" || true
             rm -f "$FIX_PROMPT"
@@ -551,7 +552,7 @@ Then 2-4 sentences: what you did, what worked, what's next.
 Be specific and honest. Then commit: git add JOURNAL.md && git commit -m "Day $DAY ($SESSION_TIME): journal entry"
 JEOF
 
-    ${TIMEOUT_CMD:+$TIMEOUT_CMD 120} claude -p --model "$MODEL" \
+    ${TIMEOUT_CMD:+$TIMEOUT_CMD 120} claude -p --model "$FAST_MODEL" \
         --allowedTools "Bash,Read,Write,Edit" \
         < "$JOURNAL_PROMPT" || true
     rm -f "$JOURNAL_PROMPT"
@@ -599,7 +600,7 @@ Separate multiple with "---". Only claim "fixed" if fully resolved.
 IEOF
 
     AGENT_EXIT=0
-    ${TIMEOUT_CMD:+$TIMEOUT_CMD 120} claude -p --model "$MODEL" \
+    ${TIMEOUT_CMD:+$TIMEOUT_CMD 120} claude -p --model "$FAST_MODEL" \
         --allowedTools "Bash,Read,Write,Edit" \
         < "$ISSUE_PROMPT" || AGENT_EXIT=$?
     rm -f "$ISSUE_PROMPT"