feat(templates): add feedback loop and performance scoring templates

Session 5 step 20 — templates for recurring feedback patterns with
VFM-compatible scoring. Adds FEEDBACK.md append-only log, PostToolUse
hook that detects 3+ recurring pattern tags, and per-agent scoring
that tracks trends against prior window.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/templates/feedback/FEEDBACK.md

@@ -0,0 +1,28 @@
+# Feedback Log: {{PROJECT_NAME}}
+
+> Append-only. One row per pipeline run. Reviewed by performance-scorer.sh.
+
+## Feedback Table
+
+| Date | Pipeline | Agent | Score | Issue | Resolution | Pattern |
+|------|----------|-------|-------|-------|------------|---------|
+| {{DATE}} | {{PIPELINE_NAME}} | {{AGENT_NAME}} | {{SCORE}}/100 | {{ISSUE_DESCRIPTION}} | {{RESOLUTION}} | {{PATTERN_TAG}} |
+
+## Pattern Tags
+
+Use consistent tags so performance-scorer.sh can detect recurring issues:
+
+- `quality-low` — output below acceptance threshold
+- `loop-excess` — more revision iterations than expected
+- `timeout` — agent exceeded time budget
+- `tool-fail` — tool call failed or returned unexpected result
+- `cost-spike` — single run cost exceeded 3x average
+- `scope-drift` — agent worked outside defined scope
+- `hallucination` — output contained factual errors
+
+## Notes
+
+Scores are 0–100 as assigned by the reviewer agent or human reviewer.
+A score below 60 triggers a flag in performance-scorer.sh.
+Three or more rows with the same Pattern tag = recurring issue.
+Recurring issues should drive prompt iteration or pipeline redesign.