feat: WP-0001 foundation + WP-0002 core extensions

WP-0001 — Foundation & GAAF Baseline
- SCOPE.md, ARCHITECTURE-LAYERS.md, contracts/ tree
- .claude/rules/ stubs filled (architecture, stack, boundary)
- 57 tests (pytest), pyproject.toml with ruff+mypy, CI workflow

WP-0002 — Core Extensions (FR-4 + FR-3)
- FR-4: BudgetTracker (thread-safe) + LLMBudgetExceededError +
  optional RunConfig.budget_tracker + enforcement in all adapters
- FR-3: async_execute_prompt on LLMAdapter ABC (asyncio.to_thread
  fallback) + native asyncio.create_subprocess_exec in ClaudeCodeAdapter

81 tests passing.

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

workplans/llm-connect-WP-0003-functional-extensions.md

@@ -0,0 +1,51 @@
+# LLM-WP-0003 — Functional Extensions (FR-2 + FR-1)
+
+**status:** active  
+**owner:** llm-connect  
+**repo:** llm-connect  
+**created:** 2026-04-01  
+**depends-on:** LLM-WP-0001 (test infrastructure must exist)
+
+## Purpose
+
+Implement the two IHF feature requests that add new Functional-layer modules.
+Neither touches Core. Both can be developed independently of WP-0002.
+
+Origin: IHUB-WP-0012 Phase 11 — Advanced AI Federation (completed 2026-04-01).
+
+## GAAF notes
+
+Both additions are Functional-layer under GAAF-2026:
+- Demand signal is explicit: IHF (inter-hub) is the primary consumer for both.
+- Each gets its own functional contract doc in `/contracts/functional/`.
+- Maturity on release: Beta (single known consumer, interface not yet stabilised).
+
+## Tasks
+
+### FR-2 — RoutingPolicy
+
+| ID  | Title | Priority | Status |
+|-----|-------|----------|--------|
+| T01 | `RoutingPolicy` data model: `rules` list with `task_type`, `prefer`, `max_cost_per_1k`, `fallback` | high | todo |
+| T02 | `policy.resolve(task_type)` → returns configured `LLMAdapter` | high | todo |
+| T03 | Export from `llm_connect.__init__` and update `__all__` | medium | todo |
+| T04 | Functional contract doc for `RoutingPolicy` | medium | todo |
+| T05 | Tests: rule match, cost-cap fallback, unknown task_type fallback, no-match default | high | todo |
+
+### FR-1 — HTTP serve mode
+
+| ID  | Title | Priority | Status |
+|-----|-------|----------|--------|
+| T06 | Design `/execute` JSON schema (request: provider, model, prompt, config; response: LLMResponse fields) | high | todo |
+| T07 | Implement `llm_connect/server.py` — minimal HTTP server, `POST /execute`, `GET /health` | high | todo |
+| T08 | `python -m llm_connect.server --port N --provider X --model Y` CLI entry point | high | todo |
+| T09 | Add `httpx` or `aiohttp` server dep under `[project.optional-dependencies] server` | medium | todo |
+| T10 | Functional contract doc (API schema — request/response shapes, error codes) | medium | todo |
+| T11 | Tests: spin up server in subprocess or via `TestClient`, POST round-trip (MockAdapter), error responses | high | todo |
+
+## Exit criteria
+
+- `RoutingPolicy.resolve("triage")` returns the correct adapter per rules in tests
+- `python -m llm_connect.server --port 9999` starts and responds to `POST /execute`
+- `GET /health` returns 200
+- All functional contract docs present in `/contracts/functional/`