Complete fin-hub repo integration (FIN-WP-0000)

Link the DB-first onboarding workstream to FIN-WP-0000-repo-integration.md,
finish agent orientation (rules stubs, remove first-session), add repo
classification, and close all four custodian onboarding tasks.

.claude/rules/stack-and-commands.md

@@ -1,19 +1,26 @@
 ## Stack
 
-<!-- TODO: Fill in language, frameworks, and key dependencies -->
-- **Language:**
-- **Key deps:**
+- **Language:** Python 3.12+
+- **Package manager:** uv
+- **Key deps:** hub-core (generic hub primitives), pydantic, httpx
 
 ## Dev Commands
 
 ```bash
-# TODO: Fill in the standard commands for this repo
-
 # Install dependencies
+uv sync
 
 # Run tests
+uv run pytest
 
-# Lint / type check
+# CLI — runway projection
+uv run finhub runway --balance 12000 --monthly-burn 2100,2200,2000
 
-# Build / package (if applicable)
-```
+# CLI — import cost CSVs
+uv run finhub import-cloud tests/fixtures/cloud-costs.csv
+uv run finhub import-anthropic tests/fixtures/anthropic-billing.csv
+uv run finhub import-hosteurope tests/fixtures/hosteurope.csv
+
+# CLI — emit cross-hub signals (requires STATE_HUB_API)
+uv run finhub runway --balance 12000 --monthly-burn 2100 --emit
+```