Initialize project scaffold and domain model

AGENTS.md

@@ -0,0 +1,68 @@
+# AGENTS
+
+## Purpose
+
+This repository is developed through agent-assisted workflow. Follow the repository documents first, then implement code.
+
+## Source of truth
+
+Use the documents in this order when there is ambiguity:
+
+1. `docs/architecture.md`
+2. `docs/module-decomposition.md`
+3. `docs/data-model.md`
+4. `docs/database-schema.md`
+5. `docs/admin-api.md`
+6. `docs/mcp-interface.md`
+7. `docs/rust-design.md`
+8. `docs/development-rules.md`
+9. `docs/rust-code-rules.md`
+10. `docs/implementation-plan.md`
+
+If code and docs diverge, update docs first or together with code.
+
+## Workflow
+
+- Follow `Red -> Green -> Refactor -> Commit`.
+- Every feature uses its own branch: `feat/<feature-name>`.
+- Commits must be atomic.
+- Push periodically after one or more logically complete `RGR + commit` cycles.
+- Do not wait for the whole feature to be finished before pushing.
+
+## Language rules
+
+- Commit messages must be in English.
+- Code identifiers must be in English.
+- Code comments are avoided by default.
+- If a code comment is truly unavoidable, it must be in English.
+
+## Code rules
+
+- Prefer self-documenting code.
+- Keep domain logic separate from storage, transport, and orchestration.
+- Do not create god-structs or giant services.
+- Keep `pub` surface minimal.
+- Avoid `unwrap`, `expect`, `todo`, `dbg`, and `panic` in production code.
+- `unsafe` is forbidden by default.
+
+## Commands
+
+Use the canonical commands from `justfile`:
+
+- `just fmt`
+- `just fmt-check`
+- `just check`
+- `just clippy`
+- `just test`
+- `just verify`
+
+## Current execution mode
+
+- Build the Rust workspace first.
+- Keep the UI as a separate app outside the Cargo workspace.
+- Implement one vertical slice at a time.
+
+## Task tracking
+
+- Check `TASKS.md` before starting a new piece of work.
+- Update `TASKS.md` when a task starts, finishes, or gets blocked.