astra-intelligence · Oct 16, 2026
diff --git a/index.html b/index.html
@@ -5,6 +5,20 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>ExtSentry - Browser Extension Threat Intelligence</title>
 <meta name="description" content="Community-driven browser extension threat intelligence. IOC feeds for malicious and sensitive browser extensions across 16+ security platform formats.">
+<meta property="og:type" content="website">
+<meta property="og:site_name" content="ExtSentry">
+<meta property="og:url" content="https://extsentry.github.io/">
+<meta property="og:title" content="ExtSentry - Browser Extension Threat Intelligence">
+<meta property="og:description" content="Community-driven browser extension threat intelligence. IOC feeds for malicious and sensitive browser extensions across 16+ security platform formats.">
+<meta property="og:image" content="https://extsentry.github.io/og-image.png">
+<meta property="og:image:width" content="1200">
+<meta property="og:image:height" content="630">
+<meta property="og:image:type" content="image/png">
+<meta property="og:locale" content="en_US">
+<meta name="twitter:card" content="summary_large_image">
+<meta name="twitter:title" content="ExtSentry - Browser Extension Threat Intelligence">
+<meta name="twitter:description" content="Community-driven browser extension threat intelligence. IOC feeds for malicious and sensitive browser extensions across 16+ security platform formats.">
+<meta name="twitter:image" content="https://extsentry.github.io/og-image.png">
 <link rel="icon" type="image/png" href="data:image/png;base64,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">
 <link rel="preconnect" href="https://fonts.googleapis.com">
 <link href="https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=IBM+Plex+Sans:wght@400;500;600;700;800&display=swap" rel="stylesheet">

diff --git a/og-image.png b/og-image.png
diff --git a/scripts/gen-og-image.py b/scripts/gen-og-image.py
@@ -0,0 +1,168 @@
+#!/usr/bin/env python3
+"""Generate og-image.png for ExtSentry (extsentry.github.io).
+
+Browser Extension Threat Intelligence — dark security-console card:
+- near-black ground (#0a0c10, matches index.html <body>), radial red-orange glow
+- glowing fiery puzzle-piece "sentry" mark (brand: demon puzzle piece w/ eye slits)
+- big wordmark, mono tagline, severity/IOC chip row, footer strip
+
+Run from the repo root: python3 scripts/gen-og-image.py
+"""
+import os
+
+from PIL import Image, ImageDraw, ImageFont
+
+W, H = 1200, 630
+
+GROUND = "#0a0c10"
+PANEL = "#12161d"
+PANEL_HI = "#1b212b"
+LINE = "#262d38"
+INK = "#e6edf3"
+INK_2 = "#c8ccd4"
+INK_3 = "#8b949e"
+ORANGE = "#ff7a18"
+RED = "#e0483e"
+EMBER = "#ffb066"
+BLUE = "#58a6ff"
+
+FONT_DIRS = [
+    "/usr/share/fonts/truetype/dejavu",
+    "/usr/share/fonts/truetype/noto",
+]
+
+
+def font(name, size):
+    for d in FONT_DIRS:
+        p = os.path.join(d, name)
+        if os.path.exists(p):
+            return ImageFont.truetype(p, size)
+    raise FileNotFoundError(f"font {name} not found")
+
+
+def rounded_rect(draw, box, r, fill, outline=None, width=1):
+    draw.rounded_rectangle(box, radius=r, fill=fill, outline=outline, width=width)
+
+
+def draw_puzzle_mark(draw, cx, cy, s, glow=True):
+    """Fiery puzzle piece with slitted eyes + jagged grin (brand motif)."""
+    # outer glow
+    if glow:
+        halo = Image.new("RGBA", (W, H), (0, 0, 0, 0))
+        hd = ImageDraw.Draw(halo)
+        hd.ellipse((cx - s * 1.05, cy - s * 1.05, cx + s * 1.05, cy + s * 1.05),
+                   fill=(255, 122, 24, 40))
+        return halo
+
+    # puzzle piece body: rounded square with left tab + right notch
+    x0, y0, x1, y1 = cx - s, cy - s, cx + s, cy + s
+    tab_w, tab_h = int(s * 0.34), int(s * 0.30)
+    notch_w, notch_h = int(s * 0.26), int(s * 0.26)
+
+    # body path via rounded_rectangle chunks (PIL has no union; draw layered)
+    rounded_rect(draw, (x0, y0 + tab_h, x1, y1 - notch_h), int(s * 0.16),
+                 fill=RED, outline=ORANGE, width=3)
+    # left tab
+    rounded_rect(draw, (x0 - tab_w, y0 + tab_h, x0 + tab_w, y1 - tab_h - int(s * 0.30)),
+                 int(s * 0.12), fill=RED, outline=ORANGE, width=3)
+    # right notch (cut out): cover with ground-colored rounded rect
+    rounded_rect(draw, (x1 - notch_w - 2, cy - notch_h, x1 + 2, cy + notch_h),
+                 int(s * 0.08), fill=PANEL, outline=PANEL)
+
+    # gradient-ish top highlight
+    rounded_rect(draw, (x0 + 22, y0 + tab_h + 22, x1 - 22, y0 + tab_h + 62),
+                 int(s * 0.08), fill=EMBER)
+
+    # two slitted angry eyes
+    eye_dx = int(s * 0.30)
+    eye_y = cy - int(s * 0.28)
+    for ex in (cx - eye_dx, cx + eye_dx):
+        draw.polygon([(ex - 24, eye_y + 14), (ex, eye_y - 12), (ex + 24, eye_y + 14),
+                      (ex + 10, eye_y + 22), (ex - 10, eye_y + 22)], fill=INK)
+        draw.polygon([(ex - 16, eye_y + 10), (ex, eye_y - 6), (ex + 16, eye_y + 10),
+                      (ex + 8, eye_y + 16), (ex - 8, eye_y + 16)], fill=ORANGE)
+
+    # jagged grin
+    gx0, gx1 = cx - int(s * 0.44), cx + int(s * 0.44)
+    gy = cy + int(s * 0.44)
+    teeth = 9
+    pts = [(gx0, gy)]
+    for i in range(teeth):
+        px = gx0 + (gx1 - gx0) * (i + 0.5) / teeth
+        pts.append((px, gy + 16))
+    pts.append((gx1, gy))
+    pts.append((gx1, gy + 2))
+    for i in range(teeth - 1, -1, -1):
+        px = gx0 + (gx1 - gx0) * (i + 0.5) / teeth
+        pts.append((px, gy + 22))
+    pts.append((gx0, gy + 2))
+    draw.polygon(pts, fill="#000000")
+
+
+def main():
+    img = Image.new("RGB", (W, H), GROUND)
+    draw = ImageDraw.Draw(img)
+
+    # top scan bar (console vibe)
+    draw.rectangle((0, 0, W, 6), fill=ORANGE)
+
+    # halo behind mark
+    halo = draw_puzzle_mark(draw, 300, 300, 180, glow=True)
+    img = Image.alpha_composite(img.convert("RGBA"), halo).convert("RGB")
+    draw = ImageDraw.Draw(img)
+
+    # mark itself
+    draw_puzzle_mark(draw, 300, 300, 180, glow=False)
+
+    # mono kicker chip
+    kf = font("DejaVuSansMono-Bold.ttf", 22)
+    kicker = "THREAT INTELLIGENCE FEED"
+    draw.rounded_rectangle((470, 150, 470 + kf.getlength(kicker) + 40, 196), 12,
+                           fill=PANEL, outline=LINE, width=2)
+    draw.text((490, 162), kicker, font=kf, fill=ORANGE)
+
+    # wordmark
+    wf = font("DejaVuSans-Bold.ttf", 104)
+    draw.text((466, 210), "ExtSentry", font=wf, fill=INK)
+
+    # tagline
+    tf = font("DejaVuSans-Bold.ttf", 28)
+    draw.text((466, 336), "Browser Extension Threat Intelligence", font=tf, fill=INK_2)
+
+    # mono sub-line
+    sf = font("DejaVuSansMono.ttf", 22)
+    draw.text((468, 390), "IOC feeds for malicious & sensitive extensions", font=sf, fill=INK_3)
+
+    # dashed separator
+    y = 448
+    x = 468
+    while x < 1110:
+        draw.rectangle((x, y, x + 26, y + 4), fill=LINE)
+        x += 42
+
+    # chip row
+    chips = [("16+ FEED FORMATS", ORANGE), ("COMMUNITY-DRIVEN", BLUE), ("FREE & OPEN", EMBER)]
+    chip_y = 478
+    cx = 466
+    cf = font("DejaVuSans-Bold.ttf", 18)
+    for label, color in chips:
+        w = int(cf.getlength(label)) + 44
+        draw.rounded_rectangle((cx, chip_y, cx + w, chip_y + 42), 10,
+                               fill=PANEL_HI, outline=color, width=2)
+        draw.text((cx + 22, chip_y + 10), label, font=cf, fill=color)
+        cx += w + 16
+
+    # footer strip
+    draw.rectangle((0, 566, W, 630), fill=PANEL)
+    ff = font("DejaVuSansMono.ttf", 22)
+    draw.text((60, 584), "extsentry.github.io", font=ff, fill=INK_3)
+    draw.text((W - 60 - ff.getlength("browser extension threat intelligence"),
+               584), "browser extension threat intelligence", font=ff, fill=INK_3)
+
+    out = "og-image.png"
+    img.save(out, "PNG")
+    print(f"wrote {out}: {img.size[0]}x{img.size[1]}")
+
+
+if __name__ == "__main__":
+    main()