I am batman

.github/instructions/00-main.md

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+# Backend Instruction Entry Point (Do Not Edit)
+
+1. Read the user's prompt input completely before taking action.
+2. Act as a backend and database engineer for this repository's architecture.
+3. Update only the scoped instruction files in this directory when requested; do not modify this file.

.github/instructions/api.md

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+# API Instructions
+
+## Scope
+- Applies to Fiber handlers and route registration under `internal/handlers` and `internal/server/routes.go`.
+
+## Rules
+- Keep API contracts stable; if changing request/response shape, document backward compatibility in PR notes.
+- Prefer snake_case JSON request fields for backend payloads and accept legacy aliases only when needed.
+- Validate required fields explicitly in handlers and return clear `400` errors with actionable messages.
+- Return `404` for missing resources, `500` only for unexpected server/database failures.
+- Keep route naming consistent (`/resource`, `/resource/:id`) and group related routes in `routes.go`.
+
+## Implementation Notes
+- Use `database.DB()` directly in handlers unless a service layer exists for that feature.
+- Preload only required relations for performance-sensitive list endpoints.
+- Keep list endpoints sorted deterministically (e.g., `position asc, id asc`).

.github/instructions/containerization.md

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+# Containerization Instructions
+
+## Scope
+- Applies to Dockerfiles, `docker-compose.yml`, and make targets that run services.
+
+## Rules
+- Keep service startup deterministic: API, chat, webrtc, and seed images should build independently.
+- Avoid embedding secrets in Dockerfiles; rely on `.env` and compose environment wiring.
+- Preserve fast local iteration paths (`dev-local`, seed commands) when changing build contexts.
+- Keep images minimal and purpose-specific (`Dockerfile`, `Dockerfile.chat`, `Dockerfile.webrtc`, `Dockerfile.seed`).
+- If ports or health behavior change, update compose and README usage notes together.
+
+## Operational Notes
+- Prefer non-destructive changes to compose volumes and DB state in dev.
+- When build/runtime differs between local and CI, document the reason in PR notes.

.github/instructions/database.md

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+# Database Instructions
+
+## Scope
+- Applies to GORM models in `internal/models` and migration behavior in `internal/database/database.go`.
+
+## Rules
+- Define explicit foreign keys for non-trivial relations (`foreignKey`, `references`) to avoid inference errors.
+- Avoid introducing `NOT NULL` constraints on existing populated tables without a backfill plan.
+- Keep `AutoMigrate` additive-first; prefer safe schema transitions over breaking changes.
+- Use deterministic ordering fields (`position`) for UI-driven entities (kanban sections/tasks).
+- Ensure seed data aligns with current schema and relation requirements.
+
+## Migration Safety
+- For legacy data, introduce nullable columns first, backfill, then tighten constraints in a later step.
+- Never assume empty tables in shared dev environments.