From 48252da8cb4c2689159d709d56b7f04ecf0b5434 Mon Sep 17 00:00:00 2001
From: Gabriel Diniz dos Santos <gabrieldiniz.profissional@gmail.com>
Date: Wed, 8 Apr 2026 00:18:28 -0300
Subject: [PATCH 1/4] feat: integrate MySQL as BM25 knowledge source

---
 .env                                          |   8 +++++-
 api/__pycache__/__init__.cpython-314.pyc      | Bin 195 -> 172 bytes
 api/__pycache__/routes.cpython-314.pyc        | Bin 4864 -> 6578 bytes
 api/routes.py                                 |  24 ++++++++++++++++
 app/__pycache__/__init__.cpython-314.pyc      | Bin 300 -> 277 bytes
 app/__pycache__/factory.cpython-314.pyc       | Bin 3019 -> 2996 bytes
 app/__pycache__/state.cpython-314.pyc         | Bin 1058 -> 1035 bytes
 core/__pycache__/__init__.cpython-314.pyc     | Bin 240 -> 217 bytes
 core/__pycache__/config.cpython-314.pyc       | Bin 4868 -> 6100 bytes
 .../logging_config.cpython-314.pyc            | Bin 1026 -> 1003 bytes
 core/config.py                                |  27 ++++++++++++++++++
 engine/__pycache__/__init__.cpython-314.pyc   | Bin 253 -> 230 bytes
 .../__pycache__/chat_provider.cpython-314.pyc | Bin 7378 -> 7355 bytes
 engine/__pycache__/context.cpython-314.pyc    | Bin 22856 -> 22833 bytes
 .../__pycache__/pinned_store.cpython-314.pyc  | Bin 5061 -> 5038 bytes
 engine/__pycache__/search.cpython-314.pyc     | Bin 15048 -> 15987 bytes
 engine/__pycache__/watcher.cpython-314.pyc    | Bin 4954 -> 4931 bytes
 engine/search.py                              |  26 +++++++++++++----
 main.py                                       |   1 +
 requirements.txt                              |   3 +-
 templates/index.html                          |   2 ++
 21 files changed, 84 insertions(+), 7 deletions(-)

diff --git a/.env b/.env
index cdcc756..503d971 100644
--- a/.env
+++ b/.env
@@ -1 +1,7 @@
-OPENROUTER_API_KEY = APIKEY 
\ No newline at end of file
+OPENROUTER_API_KEY=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
+
+DB_HOST=localhost
+DB_PORT=3306
+DB_NAME=pybot
+DB_USER=root
+DB_PASSWORD=
\ No newline at end of file
diff --git a/api/__pycache__/__init__.cpython-314.pyc b/api/__pycache__/__init__.cpython-314.pyc
index c32702309d8103c14e1b67941b160072573a3ab5..77c4f5b24fa375fc73047c1e190cbb629fbc5b56 100644
GIT binary patch
delta 44
ycmX@ixQ3Ben~#@^0SLBixtb|Dk=I99*TpI(peR2pwIshdCZMt;BR_9qvjYGTCJq(=

delta 67
zcmZ3(c$kq_n~#@^0SK)7u4al%<n_^Vakh#HElw>ej!92UOiGFI&r5YF$}CHbami0E
V%}vcK$uEv^&n)pMO`4eF005cu7D)gA

diff --git a/api/__pycache__/routes.cpython-314.pyc b/api/__pycache__/routes.cpython-314.pyc
index af7eb8d183b5eda987a64b550b1ba04828b54b1c..a002356db7f4dcb10d5fc25b531dc5d02d0e426d 100644
GIT binary patch
delta 2717
zcmaJ@U2Gf25#GC_#N$6HQsR$k@kGfIX*rTAnUyRkQXJWC)5tD;Qqm+AO`MJw>EaVl
z-aE#zUMSQ_;64<IeF36}0u@l8ND%~0qdX-=8^!$z&=epm8&s|a>ZS;az9~%rH$Wdc
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delta 1031
zcmY*XO-vI(6rS1Lw)Ahswy@>@r&uV65Ts&^knk61LbO@L#H0-=Wm6VQx0%_3H;9Cr
z9LQX}dh}!zPkJyVYQjwq#JC<XF~%#1#+&g?OCiqTdvD(R=FR(iadjgs_sCusf)jaq
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diff --git a/api/routes.py b/api/routes.py
index 0ae7448..cb24c0f 100644
--- a/api/routes.py
+++ b/api/routes.py
@@ -8,6 +8,8 @@
 from fastapi import APIRouter, HTTPException, Request
 from fastapi.responses import HTMLResponse, StreamingResponse
 
+from collections.abc import AsyncGenerator
+
 log = logging.getLogger("kernelbots.api.chat")
 
 router = APIRouter()
@@ -75,6 +77,28 @@ async def chat(request: Request) -> StreamingResponse:
             detail="Campo 'session_id' deve ser string ou omitido.",
         )
 
+    if user_message.strip().lower() == "/reload":
+        log.info("🔄 Comando /reload recebido — reconstruindo índice BM25...")
+        services.search_engine.rebuild()
+        chunk_count = len(services.search_engine.chunks)
+        db_count = sum(1 for c in services.search_engine.chunks if c.get("source", "").startswith("db:"))
+        md_count = chunk_count - db_count
+        status = (
+            f"Índice reconstruído: {chunk_count} chunk(s) total "
+            f"({md_count} de arquivos .md + {db_count} do MySQL)."
+        )
+        log.info("✅ /reload concluído — %s", status)
+
+        async def _reload_stream() -> AsyncGenerator[str, None]:
+            yield f"data: {status}\n\n"
+            yield "data: [DONE]\n\n"
+
+        return StreamingResponse(
+            _reload_stream(),
+            media_type="text/event-stream",
+            headers={"Cache-Control": "no-cache", "X-Accel-Buffering": "no", "Connection": "keep-alive"},
+        )
+
     built = services.context_manager.build_messages(
         user_message,
         discipline_filter=discipline,
diff --git a/app/__pycache__/__init__.cpython-314.pyc b/app/__pycache__/__init__.cpython-314.pyc
index b4a0e4f46cd0b294809b83d1f9c00ee336ce0c02..db1147b4964a3e2ab5f657cf9b37ffd04e7c8c3a 100644
GIT binary patch
delta 44
ycmZ3(G?j^0n~#@^0SLBixtdu#k$1JQu8UPnKv8~HYDs=^Oh9ExMt<JJM_vFOS`QEa

delta 67
zcmbQrw1$aSn~#@^0SGMmu4d*<<Xx@h;%pTYTAW%`9Fv}yn3NLZpO@-Vlv$P<<C33T
Vnwy$el3yI-o>}5inl$mW7XY!u7d!v}

diff --git a/app/__pycache__/factory.cpython-314.pyc b/app/__pycache__/factory.cpython-314.pyc
index b32b8b8753180ac548c18d3f85f3d46fa13eb1f9..9c439849ec6f429ebbf9dc8216f4e9a402a5687f 100644
GIT binary patch
delta 47
zcmX>tzD1l@n~#@^0SLBixte)nBkvzZVI3E%n1G`EtkjbH;+TNSl8pSk&BjbKI00%`
B5E=jg

delta 70
zcmdlYep;MYn~#@^0SIPKxth6VBkvzZEoWz|n9$<XqT-nJ#KfeO82`Lfm!izF)EJli
Y<kH;KypsIl828K)kJ6;gGE6f#0Xkb4hyVZp

diff --git a/app/__pycache__/state.cpython-314.pyc b/app/__pycache__/state.cpython-314.pyc
index 58d7902c55b0f6380d6c2820047f510bcd424dbc..98972be465bbed633f16335e70827870d657d2c1 100644
GIT binary patch
delta 47
zcmZ3)(apiD&Bx2d00djMT+OuD$lJ*ztmR@A6Ht_&m0FTt91~Dkl98Xc`2bTABLF!b
B4&?v<

delta 70
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diff --git a/core/__pycache__/__init__.cpython-314.pyc b/core/__pycache__/__init__.cpython-314.pyc
index 2c6cbb18a9f0bf131873287df86e2779fc40934f..9cbd5b2ffe7f860ee4bd8a553896b0828c4e7be7 100644
GIT binary patch
delta 44
ycmeysc$1M=n~#@^0SLBixteJ=k+(uv&&4VxpeR2pwIshdCZMt;BR_BAdPe{$CJyre

delta 67
zcmcb~_<@mEn~#@^0SK7;u4dX!<gL(hb+(ELElw>ej!92UOiGFI&r5YF$}CHbami0E
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diff --git a/core/__pycache__/config.cpython-314.pyc b/core/__pycache__/config.cpython-314.pyc
index 463a9a02961bf2529e76063ce7e15a7fb31d6703..e40be64125f1a0e466ce4503ae89308b9cf5018c 100644
GIT binary patch
delta 1570
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delta 749
zcmY+BPiWI{6vuzRq+OeK{kJYnvaW5~xv@-V#Z5Qrx(S;!Omq-3wnGMPZPyjrb^Ow*
z7tw<^FT(HU$&27siZ{W7;yj8dgx$P&)wzMvlfRduurJBy_jtVbefi~m$v>V5pAUxu
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diff --git a/core/__pycache__/logging_config.cpython-314.pyc b/core/__pycache__/logging_config.cpython-314.pyc
index 69ccfacf0ef1fc36184690a102165731cc4cf944..c990bc299e1b34c8012cac7829610e0fda5d9abc 100644
GIT binary patch
delta 47
zcmZqTc+JkM&Bx2d00djMT+Mv2kyngS*u=#uCZH%kE43uQI3}R7BqKj>voGUTCICw>
B4?+L{

delta 70
zcmaFO-o(MH&Bx2d00gXkS2NFV<P~Go@^-e02`x@7Dvn7{OiW6N@y|<jDatHMjd96O
YF3nBNE6Fd8anCIAC{5aI#<-OU0Ow*CF8}}l

diff --git a/core/config.py b/core/config.py
index 096b381..a20593a 100644
--- a/core/config.py
+++ b/core/config.py
@@ -27,6 +27,11 @@ class Settings:
     pinned_max_turns: int
     pinned_max_chars: int
     pinned_weak_score: float
+    db_host: str
+    db_port: int
+    db_name: str
+    db_user: str
+    db_password: str
 
     @property
     def openrouter_headers(self) -> dict[str, str]:
@@ -87,6 +92,23 @@ def load(cls) -> Settings:
             raise RuntimeError("ACL_PINNED_WEAK_SCORE deve ser um número.") from None
         pinned_weak_score = max(0.05, min(0.95, pinned_weak_score))
 
+        """ !Credenciais do banco! """
+
+        db_host = (os.getenv("DB_HOST") or "").strip()
+
+        db_port_raw = (os.getenv("DB_PORT") or "3306").strip()
+
+        try:
+            db_port = int(db_port_raw)
+        except ValueError:
+            raise RuntimeError("DB_PORT deve ser um inteiro.") from None
+
+        db_name = (os.getenv("DB_NAME") or "").strip()
+
+        db_user = (os.getenv("DB_USER") or "").strip()
+
+        db_password = (os.getenv("DB_PASSWORD") or "").strip()
+
         return cls(
             openrouter_api_key=key,
             project_root=project_root,
@@ -100,4 +122,9 @@ def load(cls) -> Settings:
             pinned_max_turns=pinned_max_turns,
             pinned_max_chars=pinned_max_chars,
             pinned_weak_score=pinned_weak_score,
+            db_host=db_host,
+            db_port=db_port,
+            db_name=db_name,
+            db_user=db_user,
+            db_password=db_password,
         )
diff --git a/engine/__pycache__/__init__.cpython-314.pyc b/engine/__pycache__/__init__.cpython-314.pyc
index 541881647de7612505a24101a5bf9fd944d6c47f..ece1cbe89edab343eba66180cd094f353b0643ba 100644
GIT binary patch
delta 44
ycmey%_>7TPn~#@^0SLBixti%Yk+)gcz{M&ipeR2pwIshdCZMt;BR_BAE@uEQ`42Jx

delta 67
zcmaFH_?MAan~#@^0SLJIu4Z~n<Zae+ceaWNElw>ej!92UOiGFI&r5YF$}CHbami0E
V%}vcK$uEv^&n)pMO`5pa834k*7c>9>

diff --git a/engine/__pycache__/chat_provider.cpython-314.pyc b/engine/__pycache__/chat_provider.cpython-314.pyc
index 554a383dd3056d0e6ffb59671a968b8cc056f59b..347a60b329c764edfc216b5c6cdea20703186356 100644
GIT binary patch
delta 47
zcmca)x!aOgn~#@^0SLBixth6gBQF<|u&IkxOh8e7R%%IpaZEsENk)F&W=E!pQUF`z
B4|M<l

delta 70
zcmdmOdC8Jjn~#@^0SIJQUd?pa$jil~<>PD>6Iz^FR2-9@n3$9j<DZx6Qj}Si8sn0m
YT$-DjSCU^G<DOaKQJS<_i)o@10QDaiH2?qr

diff --git a/engine/__pycache__/context.cpython-314.pyc b/engine/__pycache__/context.cpython-314.pyc
index 4c471d131ed08c772db579a38477cc4df0bdc63d..b368c6989012aa5cd8d11c783e933722536c3f3e 100644
GIT binary patch
delta 50
zcmX@HiE-m5Mm}vmUM>b8*s|qnW~}2zzT0fV`Yu*60Y&*)sU`WvF#(k&8Tomeh1pGm
E0HBf(#sB~S

delta 73
zcmdnEiSfiHMm}vmUM>b82w8bGbE*ACzT0eCZq8OQp~b01#WCrLiAgCj{&}e`MVV!(
cF)sPZrManjCHciM?wKVXrAeFru$cw{0F?6@a{vGU

diff --git a/engine/__pycache__/pinned_store.cpython-314.pyc b/engine/__pycache__/pinned_store.cpython-314.pyc
index 953f4673bc464a1bb09744fd8dd5471e5ab41462..5834e63b9e48434a4d2cc1d8835545308a542265 100644
GIT binary patch
delta 47
zcmX@AzD}K2n~#@^0SLBixte)rBQFoLu!)OROh8e7R%%IpaZEsENk)F&W@qLm0RUDB
B4^998

delta 70
zcmZ3depH=Tn~#@^0SFvcT+Qs?$jig5<?U=06Iz^FR2-9@n3$9j<DZx6Qj}Si8sn0m
YT$-DjSCU^G<DOaKQJS<_hq*}r0Q|%kQ~&?~

diff --git a/engine/__pycache__/search.cpython-314.pyc b/engine/__pycache__/search.cpython-314.pyc
index 44dd4061316b8dcb0e89070e753ccf80d0c9d664..7ab519cf1d5346fe7e3596383a2150e804857e42 100644
GIT binary patch
delta 4500
zcmb7HeQaCR6@Sn6v;Azxc49lW^JVADiIb2ol7_S)Z6GO4Rzmtx+|ni(*M4nG6WhJ-
zr6e6A)##>lpf%mqw8ADRny69@wu-<6+N2c*9iUBWNxOz8x^)xNw*OKJD|Fh&IoELr
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kxZF+t06a8LWrRMwK4iSY1+Q@RbZ&jv5!dr@c0{)D-`)M!Jpcdz

delta 3646
zcmb7GYitzP6`t9h+1=S)@58%(tzYZ4S+jO91{N^bv3a>M1dKfalVCf`vOAcK*SqG<
zm_U*iq@;-mQYoCER8iW}B&tA7l}c{YCTc4vDxj!UK~dUdRJEvo(*CJz5$cNm={a|7
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z(ivXWS0VJPeqJe21K1GcvQI5VImBhZ8b-N{%K^0<<q9qb)mpU*YZ0p9hD+6IBcxWs
zRa*u=T)zYI_FZtt9&PE}zIkN7t}%UNES)}_9obvZcCg%WZDdC=Gc}<VjG{jBSkCC1
zIt-H3J6wrJ)z>1N7UqN!xnh>!ZduigjOC0&h}6$GNpcBwt7jCF+=AOT>p|%rSt%nC
z&VOWbyC5j{{*1zDxZ7M0f0UZMBd&!G18#I!7|zwWYKDY@V?n)Iz?yTRHWGxba;REa
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diff --git a/engine/__pycache__/watcher.cpython-314.pyc b/engine/__pycache__/watcher.cpython-314.pyc
index 71624369e18ae0467a9d2abda991964134b7d999..7679849a3a0268385d6a6581c65d119d793c8c17 100644
GIT binary patch
delta 47
zcmcbmc36#9n~#@^0SLBixtf`_kvEV@Sl`7eCZH%kE43uQI3}R7BqKj>a|hEU0RUIc
B57Phu

delta 70
zcmX@Cc1w*{n~#@^0SG3|yP9dRkvEV@%PrX|CbT%Us5mA)F)=A6#y>CBr6{v3HO3`B
YximL5uOz=X#yzvdqcmxAA=4!R02k93SO5S3

diff --git a/engine/search.py b/engine/search.py
index ebf036a..5a10203 100644
--- a/engine/search.py
+++ b/engine/search.py
@@ -12,6 +12,8 @@
 from rank_bm25 import BM25Okapi
 
 from core.config import GlobalContextMode
+from core.config import Settings
+from engine.database import fetch_db_chunks
 
 log = logging.getLogger(f"kernelbots.{__name__}")
 
@@ -26,10 +28,12 @@ def __init__(
         content_dir: Path,
         score_threshold: float,
         global_context_mode: GlobalContextMode = "geral",
+        settings: Settings | None = None,   # <-- adicionar
     ) -> None:
         self._content_dir = content_dir.resolve()
         self._score_threshold = score_threshold
         self._global_context_mode: GlobalContextMode = global_context_mode
+        self._settings = settings 
         self._lock = threading.RLock()
         self._silos: dict[str, dict[str, Any]] = {}
         self._discipline_ids: frozenset[str] = frozenset()
@@ -151,6 +155,15 @@ def rebuild(self) -> None:
             log.warning(
                 "⚠  Nenhum .md indexado — BM25 desativado. Modo assistente geral ativo."
             )
+                
+        # --- chunks do MySQL (silo "db") ---
+        db_chunks: list[dict] = []
+        if self._settings is not None:
+            db_chunks = fetch_db_chunks(self._settings)
+        if db_chunks:
+            tokenized_db = [self._tokenize(c["text"]) for c in db_chunks]
+            new_silos["db"] = {"chunks": db_chunks, "bm25": BM25Okapi(tokenized_db)}
+            all_chunks.extend(db_chunks)
 
         elapsed = (time.perf_counter() - t0) * 1000
         with self._lock:
@@ -158,11 +171,11 @@ def rebuild(self) -> None:
             self._silos = new_silos
             self._all_chunks = all_chunks
 
+        db_count = len(db_chunks)
+        md_count = len(all_chunks) - db_count
         log.info(
-            "✅ Índice BM25 por silo pronto — %s chunk(s) | %s silo(s) | rebuild em %.1fms",
-            len(all_chunks),
-            len(new_silos),
-            elapsed,
+            "✅ Índice BM25 por silo pronto — %s chunk(s) (%s .md + %s MySQL) | %s silo(s) | rebuild em %.1fms",
+            len(all_chunks), md_count, db_count, len(new_silos), elapsed,
         )
 
     def normalize_discipline(self, raw: str | None) -> str | None:
@@ -225,7 +238,10 @@ def search(
                 return self._hits_in_silo(nd, query, top_k)
 
             if self._global_context_mode == "geral":
-                return self._hits_in_silo("geral", query, top_k)
+                hits = self._hits_in_silo("geral", query, top_k)
+                hits += self._hits_in_silo("db", query, top_k)
+                hits.sort(key=lambda h: h["score"], reverse=True)
+                return hits[:top_k]
 
             merged: list[dict] = []
             for silo in sorted(self._silos.keys()):
diff --git a/main.py b/main.py
index a8efe52..b45637f 100644
--- a/main.py
+++ b/main.py
@@ -24,6 +24,7 @@
     settings.content_dir,
     settings.bm25_score_threshold,
     settings.global_context_mode,
+    settings=settings,
 )
 observer = start_content_observer(search_engine, settings.content_dir)
 
diff --git a/requirements.txt b/requirements.txt
index f93aa6e..bbba313 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,4 +5,5 @@ python-dotenv
 jinja2
 rank-bm25
 watchdog
-pytest
\ No newline at end of file
+pytest
+PyMySQL
\ No newline at end of file
diff --git a/templates/index.html b/templates/index.html
index 9e63d6c..f7c13e9 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -32,6 +32,7 @@
                     <code>content/doc</code>), <code>/python</code>, <code>/visualizacao-sql</code>,
                     <code>/projeto-bloco</code>, <code>/planejamento-curso-carreira</code> (RAG só na disciplina).</p>
                 <div class="cmd-pills">
+                    <span class="cmd-pill">/reload</span>
                     <span class="cmd-pill">/python o que são listas?</span>
                     <span class="cmd-pill">/visualizacao-sql explique GROUP BY</span>
                     <span class="cmd-pill">/projeto-bloco resuma o pipeline</span>
@@ -48,6 +49,7 @@
                 <span>Enter</span> envia · <span>Shift+Enter</span> nova linha ·
                 <span>/python</span> · <span>/visualizacao-sql</span> · <span>/projeto-bloco</span> ·
                 <span>/planejamento-curso-carreira</span> · <span>/doc</span> · <span>/content</span>
+                · <span>/reload</span> para reconstruir o índice
             </div>
             <div class="input-row">
                 <textarea id="message-input" rows="1" placeholder="Digite sua mensagem..." autocomplete="off"

From 2ee1d52dc81af115be015342ea34a8ab800ae706 Mon Sep 17 00:00:00 2001
From: Gabriel Diniz dos Santos <gabrieldiniz.profissional@gmail.com>
Date: Wed, 8 Apr 2026 00:18:38 -0300
Subject: [PATCH 2/4] feat: integrate MySQL as BM25 knowledge source

---
 SQL/instructions_for_creation.md            |   2 +
 SQL/schema.sql                              |  10 +++
 __pycache__/app.cpython-314.pyc             | Bin 0 -> 27218 bytes
 __pycache__/main.cpython-314.pyc            | Bin 0 -> 2459 bytes
 engine/__pycache__/database.cpython-314.pyc | Bin 0 -> 4375 bytes
 engine/database.py                          |  84 ++++++++++++++++++++
 6 files changed, 96 insertions(+)
 create mode 100644 SQL/instructions_for_creation.md
 create mode 100644 SQL/schema.sql
 create mode 100644 __pycache__/app.cpython-314.pyc
 create mode 100644 __pycache__/main.cpython-314.pyc
 create mode 100644 engine/__pycache__/database.cpython-314.pyc
 create mode 100644 engine/database.py

diff --git a/SQL/instructions_for_creation.md b/SQL/instructions_for_creation.md
new file mode 100644
index 0000000..1110b26
--- /dev/null
+++ b/SQL/instructions_for_creation.md
@@ -0,0 +1,2 @@
+# Para criar o banco:
+mysql -u root -p -e "CREATE DATABASE IF NOT EXISTS pybot CHARACTER SET utf8mb4;"
\ No newline at end of file
diff --git a/SQL/schema.sql b/SQL/schema.sql
new file mode 100644
index 0000000..1c73b4b
--- /dev/null
+++ b/SQL/schema.sql
@@ -0,0 +1,10 @@
+CREATE TABLE IF NOT EXISTS knowledge (
+    id         INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+    title      VARCHAR(255) NOT NULL,
+    content    TEXT         NOT NULL,
+    category   VARCHAR(100) NOT NULL DEFAULT 'geral',
+    active     TINYINT(1)   NOT NULL DEFAULT 1,
+    created_at DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    INDEX idx_active_category (active, category)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
\ No newline at end of file
diff --git a/__pycache__/app.cpython-314.pyc b/__pycache__/app.cpython-314.pyc
new file mode 100644
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diff --git a/engine/database.py b/engine/database.py
new file mode 100644
index 0000000..f20c798
--- /dev/null
+++ b/engine/database.py
@@ -0,0 +1,84 @@
+"""Fonte de dados MySQL para o índice BM25."""
+from __future__ import annotations
+
+import logging
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from core.config import Settings
+
+log = logging.getLogger(f"kernelbots.{__name__}")
+
+DB_CHUNK_WORDS   = 500
+DB_CHUNK_OVERLAP = 50
+
+
+def _chunk_text(text: str, title: str, source: str) -> list[dict]:
+    """Divide texto em janelas de ~500 palavras com overlap de 50."""
+    words = text.split()
+    if not words:
+        return []
+    chunks: list[dict] = []
+    start = 0
+    while start < len(words):
+        end = min(start + DB_CHUNK_WORDS, len(words))
+        chunks.append({
+            "text": f"{title}\n" + " ".join(words[start:end]),
+            "source": source,
+            "discipline": "db",
+        })
+        if end == len(words):
+            break
+        start += DB_CHUNK_WORDS - DB_CHUNK_OVERLAP
+    return chunks
+
+
+def fetch_db_chunks(settings: Settings) -> list[dict]:
+    """
+    Busca rows ativas da tabela knowledge e retorna lista de chunks BM25.
+    Retorna [] com warning se o DB não estiver configurado ou falhar.
+    """
+    if not all([settings.db_host, settings.db_name, settings.db_user]):
+        log.debug("Variáveis DB_* não configuradas — pulando fonte MySQL.")
+        return []
+
+    try:
+        import pymysql
+        import pymysql.cursors
+    except ImportError:
+        log.warning("PyMySQL não instalado — fonte MySQL desativada.")
+        return []
+
+    try:
+        conn = pymysql.connect(
+            host=settings.db_host,
+            port=settings.db_port,
+            database=settings.db_name,
+            user=settings.db_user,
+            password=settings.db_password,
+            charset="utf8mb4",
+            cursorclass=pymysql.cursors.DictCursor,
+            connect_timeout=5,
+            read_timeout=10,
+        )
+        with conn:
+            with conn.cursor() as cursor:
+                cursor.execute(
+                    "SELECT id, title, content, category "
+                    "FROM knowledge WHERE active = 1 ORDER BY id"
+                )
+                rows = cursor.fetchall()
+
+        all_chunks: list[dict] = []
+        for row in rows:
+            source = f"db:{row['category']}"
+            chunks = _chunk_text(row["content"], row["title"], source)
+            all_chunks.extend(chunks)
+            log.debug("   🗄  row id=%s '%s' → %s chunk(s)", row["id"], row["title"], len(chunks))
+
+        log.info("   🗄  MySQL: %s row(s) → %s chunk(s) carregados", len(rows), len(all_chunks))
+        return all_chunks
+
+    except Exception:
+        log.warning("⚠  Falha ao conectar ao MySQL — continuando apenas com .md.", exc_info=True)
+        return []
\ No newline at end of file

From e66dec313ba5788c9e52f0dac1e311b006198c06 Mon Sep 17 00:00:00 2001
From: Gabriel Diniz dos Santos <95745774+gbdiniz@users.noreply.github.com>
Date: Wed, 8 Apr 2026 09:55:21 -0300
Subject: [PATCH 3/4] Add .env to .gitignore

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index e69de29..0c2ad09 100644
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1 @@
+.env

From eb5ef8ffeaca102f2c6cbf218ed0a8868e364c87 Mon Sep 17 00:00:00 2001
From: Gabriel Diniz dos Santos <95745774+gbdiniz@users.noreply.github.com>
Date: Wed, 8 Apr 2026 10:00:37 -0300
Subject: [PATCH 4/4] Delete .env

---
 .env | 7 -------
 1 file changed, 7 deletions(-)
 delete mode 100644 .env

diff --git a/.env b/.env
deleted file mode 100644
index 503d971..0000000
--- a/.env
+++ /dev/null
@@ -1,7 +0,0 @@
-OPENROUTER_API_KEY=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
-
-DB_HOST=localhost
-DB_PORT=3306
-DB_NAME=pybot
-DB_USER=root
-DB_PASSWORD=
\ No newline at end of file