feat(slopbot): add LLM @mention with agentic Kagi tool calling (t-937)

- Detect @**slop** mentions via MENTION_RE regex
- Agentic loop (MAX_ITER=5): LLM decides when to call kagi_search
- Routing: Parasail primary (model discovery), Ollama qwen2.5:3b fallback
- kagi_search tool: hits Kagi API, returns top-3 snippet results
- Tickers appended to LLM reply when @mention includes $TICKER
- Logging: mention detected, tool calls, Kagi result count, backend used, response
- shell.nix: added openai + requests packages
- requirements.txt: openai>=1.0.0, requests>=2.28.0

1 files changed, 2 insertions, 0 deletions

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..6c7f168
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,2 @@
+export PARASAIL_API_KEY="psk-parasailzmJ0-Yj3t3mofugwBetQifS0r"
+export KAGI_API_KEY="9Iyt2Wy_ZQFJzkFPL7t6AbvlrnlY8uTBcxC8fhqakqk.MxMiJl0SPTbtjRuZmaSTGi8LQBvq8dajYN29qdOtJ8Y"