feat: add target repo examples and file layout guidance

examples/node-project/ai/harness-health.md

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+# Harness Health
+
+- project map clarity: partial
+- validation commands: strong
+- fast feedback: partial
+- task templates: partial
+- guardrails: strong
+- doc-code alignment: partial
+
+## Top priorities
+1. Add a faster unit-test-only command
+2. Document generated-code boundaries more clearly
+3. Keep AGENTS.md aligned with actual routes and services

examples/node-project/ai/project-map.md

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+# Project Map
+
+## Entry points
+- `src/index.ts` — app bootstrap
+- `src/routes/` — route registration
+
+## Main layers
+- routes -> services -> db
+- shared utilities live under `src/lib/`
+
+## Notes
+- Integration tests may require a local database service
+- Some generated types may exist under `src/generated/`; avoid editing them directly unless asked

examples/node-project/ai/risk-guardrails.md

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+# Risk Guardrails
+
+- Do not edit `src/generated/` unless the task is specifically about code generation
+- Do not update lockfiles unless dependency changes are required
+- Do not disable tests to achieve a passing run
+- Treat deployment and CI files as high-risk areas
+- Prefer package- or module-scoped validation before full-suite validation

examples/node-project/ai/task-templates.md

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+# Task Templates
+
+## Bugfix
+Goal: fix a specific bug with minimal API change.
+
+Required flow:
+1. Read relevant implementation and tests
+2. Summarize likely root cause briefly
+3. Implement the smallest safe fix
+4. Run targeted tests, then broader checks if needed
+5. Report changed files and residual risks
+
+## Feature
+Goal: add a small feature without broad refactors.
+
+Required flow:
+1. Inspect related modules and interfaces
+2. Preserve public API unless the task says otherwise
+3. Add tests for new behavior
+4. Run lint, typecheck, and tests