Initial commit: prospecting agent loop MVP

Closed-loop account-intelligence system: harvest -> relevance filter vs.
Capability Library -> synthesize -> score -> deliver -> feedback.

- 40-capability Broadcom + VMware library
- Live Exa.ai news connector with hard free-plan request ceilings
- Provider-agnostic LLM layer (Gemini/Anthropic) with offline mock fallback
- LLM confidence wired into composite scoring + low-confidence floor
- 7-account pilot list

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

sales-agent/.env.example

@@ -0,0 +1,33 @@
+# Copy to .env and fill in. The loop runs WITHOUT a key using a mock reasoner.
+
+# --- LLM provider ---
+# LLM_PROVIDER: gemini | anthropic  (auto-detected from whichever key is set,
+# Gemini preferred, if left blank). Provider with a missing key => mock reasoner.
+LLM_PROVIDER=gemini
+GEMINI_API_KEY=
+GEMINI_MODEL=gemini-2.5-flash
+
+ANTHROPIC_API_KEY=
+LLM_MODEL=claude-sonnet-4-6
+
+# Force the offline mock reasoner even if a key is set:
+# USE_MOCK_LLM=1
+
+# Scoring thresholds (design Phase 5)
+PRIORITY_THRESHOLD=0.72
+STANDARD_THRESHOLD=0.45
+
+# --- Exa.ai news/web harvester ---
+# Without a key, the news connector falls back to data/fixtures.json.
+EXA_API_KEY=
+EXA_ENABLED=1
+# Hard ceilings to stay inside the free plan (~20,000 req/month). The connector
+# refuses to call Exa once either cap is reached. Monthly count persists in
+# output/state/exa_usage.json and resets at the start of each calendar month.
+EXA_MONTHLY_REQUEST_CAP=1000
+EXA_PER_RUN_REQUEST_CAP=25
+EXA_RESULTS_PER_QUERY=5
+EXA_LOOKBACK_DAYS=45
+# Scope news to each account's own domain (1, default) to cut ticker/analyst
+# noise, or search the broad web (0). Override per run: loop --no-domain-filter
+EXA_DOMAIN_FILTER=1