From a6258c0c45f7c5d08ff77d4bcf9d747a24199a15 Mon Sep 17 00:00:00 2001
From: Kris Yotam <krisyotam@users.noreply.github.com>
Date: Thu, 12 Mar 2026 21:23:22 -0500
Subject: [PATCH] update sbot

---
 CLAUDE.md => .claude/CLAUDE.md |  26 ++-
 .gitignore                     |   2 +-
 Makefile                       |  18 +-
 README.md                      | 229 ++++++++++++++++++
 archiver.c                     |  72 +++++-
 config.h                       |   6 +-
 detect.c                       | 411 +++++++++++++++++++++++++++++++++
 detect.h                       |  42 ++++
 robots.c                       |   4 +-
 9 files changed, 780 insertions(+), 30 deletions(-)
 rename CLAUDE.md => .claude/CLAUDE.md (82%)
 create mode 100644 README.md
 create mode 100644 detect.c
 create mode 100644 detect.h

diff --git a/CLAUDE.md b/.claude/CLAUDE.md
similarity index 82%
rename from CLAUDE.md
rename to .claude/CLAUDE.md
index c2bef6d26b4a539677ed19790253616cf7d7d27f..c4b20db716d33e40369991ff2b41dbf3d0e99816 100644
--- a/CLAUDE.md
+++ b/.claude/CLAUDE.md
@@ -1,11 +1,12 @@
-# archiver-bot — CLAUDE.md
+# sbot — CLAUDE.md
 
 ## Project
 
-archiver-bot is a suckless web archiver written in C. It creates
-self-contained archives of websites with all resources (CSS, images,
-fonts) inlined as data URIs. Supports single-page and recursive
-whole-site archival with GWTAR (Gwern Web Tar Archive) format headers.
+sbot (Simple Archiver Bot) is a suckless web archiver written in C. It
+creates self-contained archives of websites with all resources (CSS,
+images, fonts) inlined as data URIs. Supports single-page archival in
+GWTAR (Gwern Web Tar Archive) format and recursive whole-site archival
+with navigable directory structure.
 
 ## Coding Standards — Suckless C Style
 
@@ -41,7 +42,7 @@ All code in this project MUST follow the suckless.org coding style:
 static void
 usage(void)
 {
-	fprintf(stderr, "usage: archiver-bot [-v] [-r] url\n");
+	fprintf(stderr, "usage: sbot [-v] [-r] url\n");
 	exit(1);
 }
 ```
@@ -96,6 +97,8 @@ usage(void)
 | Crawler | `queue_`, `visited_` | crawl.c | URL queue (BFS), visited set, URL normalization, path conversion |
 | Fetcher | `fetch_` | fetch.c | HTTP fetching via libcurl, response management |
 | Parser | `reslist_`, `parse_` | parse.c | HTML parsing, resource extraction, image inlining |
+| Robots | `robots_` | robots.c | robots.txt fetching, parsing, and rule matching |
+| Detect | `detect_`, `siteinfo_` | detect.c | CMS/framework detection (WordPress, Blogger, Hugo, Jekyll, Ghost, Drupal, MediaWiki) |
 | Utilities | `die`, `warn`, `x*`, `str_*`, `url_*` | util.c | Memory wrappers, string ops, URL helpers, base64, MIME types |
 | Config | — | config.h | Compile-time constants (timeouts, limits, user agent) |
 
@@ -114,11 +117,12 @@ usage(void)
 - **Depth control.** Hard limit on crawl depth to prevent runaway.
 - **URL normalization.** Canonical form for deduplication.
 - **Graceful degradation.** Skip failed resources, continue crawling.
+- **robots.txt compliance.** Respects Disallow/Allow rules and Crawl-delay.
 
 ## Build
 
 ```sh
-make            # build archiver-bot binary
+make            # build sbot binary
 make clean      # remove build artifacts
 make install    # install to /usr/local/bin
 ```
@@ -128,14 +132,14 @@ Dependencies: `libcurl` (via pkg-config)
 ## Usage
 
 ```sh
-# Single page
-archiver-bot https://example.com/article
+# Single page archive (GWTAR format)
+sbot https://example.com/article
 
 # Whole site (recursive, depth 3)
-archiver-bot -r -d 3 https://example.com
+sbot -r -d 3 https://example.com
 
 # Verbose with custom output dir
-archiver-bot -v -r -o ./archive https://example.com
+sbot -v -r -o ./archive https://example.com
 ```
 
 ## Git Conventions
diff --git a/.gitignore b/.gitignore
index 52af25699b65dd3cc75b6a6218e2b45ea25a7cf3..694348837cc152c534af2b8992c83f9cd5a9a56b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 # Build artifacts
-archiver-bot
+sbot
 *.o
 
 # Test output
diff --git a/Makefile b/Makefile
index 7f5ba55a7475525923b06db3cdfcf1ec484ff3b1..cb24706169d0e6cb38b16b302b3729f63f180a1b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
-# archiver-bot - suckless web archiver
+# sbot - Simple Archiver Bot
 # See LICENSE file for copyright and license details.
 
-VERSION = 0.2.0
+VERSION = 0.3.0
 
 # paths
 PREFIX = /usr/local
@@ -20,26 +20,26 @@ LDFLAGS  = $(LIBS)
 CC = cc
 
 # sources
-SRC = archiver.c crawl.c fetch.c parse.c robots.c util.c
+SRC = archiver.c crawl.c detect.c fetch.c parse.c robots.c util.c
 OBJ = $(SRC:.c=.o)
 
-all: archiver-bot
+all: sbot
 
 .c.o:
 	$(CC) $(CFLAGS) -c $<
 
-archiver-bot: $(OBJ)
+sbot: $(OBJ)
 	$(CC) -o $@ $(OBJ) $(LDFLAGS)
 
 clean:
-	rm -f archiver-bot $(OBJ)
+	rm -f sbot $(OBJ)
 
 install: all
 	mkdir -p $(DESTDIR)$(PREFIX)/bin
-	cp -f archiver-bot $(DESTDIR)$(PREFIX)/bin
-	chmod 755 $(DESTDIR)$(PREFIX)/bin/archiver-bot
+	cp -f sbot $(DESTDIR)$(PREFIX)/bin
+	chmod 755 $(DESTDIR)$(PREFIX)/bin/sbot
 
 uninstall:
-	rm -f $(DESTDIR)$(PREFIX)/bin/archiver-bot
+	rm -f $(DESTDIR)$(PREFIX)/bin/sbot
 
 .PHONY: all clean install uninstall
diff --git a/README.md b/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..49089cc90ed3e010bf8c178d4c7a63887354c97c
--- /dev/null
+++ b/README.md
@@ -0,0 +1,229 @@
+# sbot
+
+**Simple Archiver Bot** -- a suckless web archiver written in C.
+
+sbot creates self-contained archives of web pages and entire websites.
+Every resource -- CSS, images, fonts, scripts -- is fetched and inlined
+directly into the HTML as base64 data URIs. The result is a single file
+(or directory of files) that renders perfectly offline, with no external
+dependencies, forever.
+
+## Why
+
+Web pages disappear. Link rot is real. The average web page has a
+half-life of about two years. Bookmarks break, articles vanish,
+references evaporate.
+
+sbot solves this by creating archives that are:
+
+- **Self-contained.** Everything is inlined. No external requests needed.
+- **Human-readable.** Output is standard HTML. Open it in any browser.
+- **Permanent.** No database, no server, no special viewer. Just files.
+- **Metadata-rich.** GWTAR headers record provenance, date, and source.
+
+## Modes
+
+### Single Page Archive
+
+```sh
+sbot https://example.com/article
+```
+
+Archives a single page in **GWTAR format** (Gwern Web Tar Archive). This
+is the default mode and the most common use case. The output is one
+`.gwtar.html` file containing:
+
+- A GWTAR metadata header (HTML comment) with title, source URL, domain,
+  author, archive date, and generator version
+- The full HTML with all CSS stylesheets inlined as `<style>` blocks
+- All images, fonts, and media encoded as `data:` URIs
+- A completely self-contained document that renders identically to the
+  original
+
+GWTAR format is ideal for:
+
+- Archiving individual articles, blog posts, and essays
+- Preserving references and citations
+- Building a personal web archive / digital library
+- Saving pages before they disappear behind paywalls or get deleted
+
+### Whole Site Archive
+
+```sh
+sbot -r https://example.com
+```
+
+Recursively crawls an entire website and archives every page. The output
+is a directory tree that mirrors the site structure, with each page saved
+as a self-contained HTML file. Internal links are rewritten to relative
+paths so navigation works offline.
+
+Features:
+
+- **BFS crawl order.** Breadth-first traversal ensures important pages
+  (closer to root) are archived first.
+- **Same-domain only.** Never follows links to external sites.
+- **robots.txt compliance.** Respects Disallow rules and Crawl-delay
+  directives by default. Override with `-R`.
+- **Depth control.** Set maximum crawl depth with `-d` to limit scope.
+- **Rate limiting.** Configurable delay between requests to be polite to
+  servers (default: 1 second).
+- **Progress reporting.** Periodic status lines showing pages archived,
+  queue depth, and elapsed time.
+- **Graceful degradation.** Failed resources are skipped; the crawl
+  continues.
+
+This mode is ideal for:
+
+- Archiving entire blogs or documentation sites
+- Creating offline mirrors of reference material
+- Preserving small-to-medium websites wholesale
+- Building browseable offline copies of sites you depend on
+
+## Usage
+
+```
+usage: sbot [-vrR] [-d depth] [-o dir] [-a author] url
+
+  -v          verbose output
+  -r          recursive (crawl entire site)
+  -R          ignore robots.txt
+  -d depth    max crawl depth (default: 5)
+  -o dir      output directory
+  -a author   site author name
+```
+
+### Examples
+
+```sh
+# Archive a single article
+sbot https://example.com/blog/post
+
+# Archive with author metadata
+sbot -a "John Doe" https://example.com/article
+
+# Crawl a blog, max depth 3
+sbot -r -d 3 https://blog.example.com
+
+# Verbose crawl to custom directory
+sbot -v -r -o ./my-archive https://docs.example.com
+
+# Crawl ignoring robots.txt restrictions
+sbot -r -R https://example.com
+```
+
+## GWTAR Format
+
+Every archived page includes a GWTAR (Gwern Web Tar Archive) metadata
+header as an HTML comment at the top of the file:
+
+```
+<!--
+================================================================
+  GWTAR ARCHIVE
+================================================================
+
+  Title:        Example Article
+  Source URL:   https://example.com/article
+  Domain:       example.com
+  Author:       John Doe
+
+  Archived by:  Kris Yotam
+  Archived on:  krisyotam.com
+  Archive date: 2026-02-14
+
+  Generator:    sbot/0.3.0
+  Format:       GWTAR (Gwern Web Tar Archive)
+
+================================================================
+-->
+```
+
+This header provides full provenance tracking: what was archived, where
+it came from, who archived it, and when.
+
+## Resource Inlining
+
+sbot inlines all resources to create truly self-contained archives:
+
+| Resource Type | Inlining Method |
+|---------------|-----------------|
+| CSS stylesheets | Fetched and inserted as `<style>` blocks |
+| Images | Base64-encoded as `data:image/*` URIs |
+| Fonts | Base64-encoded as `data:font/*` URIs |
+| Other media | Base64-encoded with appropriate MIME type |
+
+Resources that fail to fetch are silently skipped -- the archive
+degrades gracefully rather than failing entirely.
+
+## Build
+
+Requires `libcurl` development headers.
+
+```sh
+# Arch Linux
+sudo pacman -S curl
+
+# Debian/Ubuntu
+sudo apt install libcurl4-openssl-dev
+
+# Build
+make
+
+# Install to /usr/local/bin
+sudo make install
+
+# Clean
+make clean
+```
+
+## Configuration
+
+All configuration is compile-time via `config.h`:
+
+| Setting | Default | Description |
+|---------|---------|-------------|
+| `USER_AGENT` | `sbot/0.3` | HTTP User-Agent string |
+| `CONNECT_TIMEOUT` | 30s | Connection timeout |
+| `REQUEST_TIMEOUT` | 60s | Total request timeout |
+| `MAX_REDIRECTS` | 10 | Maximum HTTP redirects to follow |
+| `MAX_DEPTH` | 5 | Default recursive crawl depth |
+| `RATE_LIMIT_MS` | 1000ms | Delay between requests |
+| `MAX_FILE_SIZE` | 50 MB | Maximum size per resource |
+| `OUTPUT_EXT` | `.gwtar.html` | File extension for archives |
+
+Edit `config.h` and rebuild to change any setting. This is the suckless
+way -- no runtime configuration files, no environment variables, no
+hidden defaults.
+
+## Architecture
+
+```
+archiver.c   Main entry, page archiving, CSS inlining, link rewriting
+crawl.c      URL queue (BFS), visited set, URL normalization
+fetch.c      HTTP fetching via libcurl
+parse.c      HTML parsing, resource extraction, image inlining
+robots.c     robots.txt fetching, parsing, rule matching
+util.c       Memory wrappers, string ops, base64, MIME types
+config.h     Compile-time constants
+```
+
+Single external dependency: libcurl. No XML parsers, no HTML5 parsers,
+no JavaScript engines. The HTML parsing is deliberately simple --
+regex-based extraction of `src`, `href`, and `url()` references. This
+handles the vast majority of real-world pages and keeps the codebase
+small and auditable.
+
+## Philosophy
+
+sbot follows the [suckless](https://suckless.org) philosophy:
+
+- Written in C99 with POSIX.1-2008
+- Minimal dependencies (libcurl only)
+- Configuration through `config.h` (edit and recompile)
+- Small, readable codebase
+- Does one thing well
+
+## License
+
+MIT/X Consortium License. See [LICENSE](LICENSE) for details.
diff --git a/archiver.c b/archiver.c
index 4c90d5ee346b8b75ca68fdf0db6f36b9b9aa066e..dd751cced08adf70fabf58c677d17726bddfb02e 100644
--- a/archiver.c
+++ b/archiver.c
@@ -1,6 +1,6 @@
 /* See LICENSE file for copyright and license details.
  *
- * archiver-bot - suckless web archiver
+ * sbot - Simple Archiver Bot
  *
  * Creates self-contained archives of websites with all
  * resources inlined as data URIs.
@@ -16,6 +16,7 @@
 
 #include "config.h"
 #include "crawl.h"
+#include "detect.h"
 #include "fetch.h"
 #include "parse.h"
 #include "robots.h"
@@ -34,7 +35,7 @@ static void
 usage(void)
 {
 	fprintf(stderr,
-	    "usage: archiver-bot [-vrR] [-d depth] [-o dir]"
+	    "usage: sbot [-vrR] [-d depth] [-o dir]"
 	    " [-a author] url\n"
 	    "\n"
 	    "  -v          verbose output\n"
@@ -139,7 +140,7 @@ generate_header(const char *title, const char *source_url)
 	    "  Archived on:  %s\n"
 	    "  Archive date: %s\n"
 	    "\n"
-	    "  Generator:    archiver-bot/%s\n"
+	    "  Generator:    sbot/%s\n"
 	    "  Format:       GWTAR (Gwern Web Tar Archive)\n"
 	    "\n"
 	    "========================================"
@@ -503,6 +504,16 @@ archive_page(const char *url)
 		return 0;
 	}
 
+	/* Detect CMS type for informational output */
+	{
+		SiteInfo *sinfo;
+
+		sinfo = detect_site(resp->data, url);
+		if (sinfo->type != SITE_UNKNOWN)
+			fprintf(stderr, "  CMS: %s\n", sinfo->name);
+		siteinfo_free(sinfo);
+	}
+
 	final_url = resp->final_url ? resp->final_url : url;
 	rel_path = url_to_path(url, base_domain);
 
@@ -555,6 +566,59 @@ crawl_site(const char *start_url)
 	free(norm);
 	queue_push(queue, start_url, 0);
 
+	/* Detect CMS type from the start page */
+	{
+		Response *detect_resp;
+		SiteInfo *sinfo;
+
+		detect_resp = fetch_url(start_url);
+		if (detect_resp && detect_resp->status_code < 400 &&
+		    detect_resp->data) {
+			sinfo = detect_site(detect_resp->data,
+			                    start_url);
+			if (sinfo->type != SITE_UNKNOWN) {
+				char **seeds;
+				int nseed, i;
+
+				fprintf(stderr,
+				    "Detected CMS: %s\n",
+				    sinfo->name);
+				if (sinfo->feed_url)
+					fprintf(stderr,
+					    "  feed: %s\n",
+					    sinfo->feed_url);
+				if (sinfo->sitemap_url)
+					fprintf(stderr,
+					    "  sitemap: %s\n",
+					    sinfo->sitemap_url);
+
+				/* Add CMS-specific seed URLs */
+				seeds = detect_seed_urls(sinfo,
+				    base_domain, &nseed);
+				for (i = 0; i < nseed; i++) {
+					norm = url_normalize(
+					    seeds[i]);
+					if (!visited_contains(
+					    visited, norm)) {
+						visited_add(
+						    visited, norm);
+						queue_push(queue,
+						    seeds[i], 0);
+						if (verbose)
+							fprintf(stderr,
+							    "  seed: %s\n",
+							    seeds[i]);
+					}
+					free(norm);
+					free(seeds[i]);
+				}
+				free(seeds);
+			}
+			siteinfo_free(sinfo);
+		}
+		response_free(detect_resp);
+	}
+
 	pages_archived = 0;
 	start_time = time(NULL);
 
@@ -673,7 +737,7 @@ main(int argc, char *argv[])
 
 	fetch_init();
 
-	fprintf(stderr, "archiver-bot %s\n", ARCHIVER_VERSION);
+	fprintf(stderr, "sbot %s\n", ARCHIVER_VERSION);
 	fprintf(stderr, "Target: %s\n", url);
 	fprintf(stderr, "Output: %s/\n", output_dir);
 	if (recursive)
diff --git a/config.h b/config.h
index e1cd9cfbebf5d6b40af15d0a53f0fd016687614d..f43f158e80c058432de7d758a41a4f00cdad8120 100644
--- a/config.h
+++ b/config.h
@@ -1,5 +1,5 @@
 /* See LICENSE file for copyright and license details.
- * archiver-bot - suckless web archiver
+ * sbot - Simple Archiver Bot
  * configuration header
  */
 
@@ -9,10 +9,10 @@
 /* Archiver metadata */
 #define ARCHIVER_NAME    "Kris Yotam"
 #define ARCHIVER_SITE    "krisyotam.com"
-#define ARCHIVER_VERSION "0.2.0"
+#define ARCHIVER_VERSION "0.3.0"
 
 /* Network settings */
-#define USER_AGENT       "archiver-bot/0.2 (+https://krisyotam.com)"
+#define USER_AGENT       "sbot/0.3 (+https://krisyotam.com)"
 #define CONNECT_TIMEOUT  30L
 #define REQUEST_TIMEOUT  60L
 #define MAX_REDIRECTS    10L
diff --git a/detect.c b/detect.c
new file mode 100644
index 0000000000000000000000000000000000000000..2f556ccde12df285ad9b3410b49bf9532a1c8ea2
--- /dev/null
+++ b/detect.c
@@ -0,0 +1,411 @@
+/* See LICENSE file for copyright and license details. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "detect.h"
+#include "util.h"
+
+/* CMS signature strings found in HTML */
+static const char *wp_sigs[] = {
+	"wp-content/",
+	"wp-includes/",
+	"wp-json/",
+	"/xmlrpc.php",
+	"name=\"generator\" content=\"WordPress",
+	"powered by WordPress",
+	NULL
+};
+
+static const char *blogger_sigs[] = {
+	"blogger.com",
+	"blogspot.com",
+	"content=\"blogger\"",
+	"name=\"generator\" content=\"Blogger",
+	"b:skin",
+	"b:template",
+	NULL
+};
+
+static const char *hugo_sigs[] = {
+	"name=\"generator\" content=\"Hugo",
+	"powered by Hugo",
+	"Hugo --",
+	NULL
+};
+
+static const char *jekyll_sigs[] = {
+	"name=\"generator\" content=\"Jekyll",
+	"powered by Jekyll",
+	"jekyll-",
+	NULL
+};
+
+static const char *ghost_sigs[] = {
+	"content=\"Ghost",
+	"ghost-",
+	"ghost/api/",
+	"class=\"gh-",
+	NULL
+};
+
+static const char *drupal_sigs[] = {
+	"Drupal.settings",
+	"name=\"generator\" content=\"Drupal",
+	"/sites/default/files/",
+	"/modules/",
+	NULL
+};
+
+static const char *mediawiki_sigs[] = {
+	"name=\"generator\" content=\"MediaWiki",
+	"wgArticleId",
+	"mw-content-text",
+	"/wiki/",
+	NULL
+};
+
+/* Check if HTML contains any signature from a list */
+static int
+match_sigs(const char *html, const char **sigs)
+{
+	int i, hits;
+
+	hits = 0;
+	for (i = 0; sigs[i]; i++) {
+		if (strcasestr(html, sigs[i]))
+			hits++;
+	}
+	return hits;
+}
+
+static const char *
+sitetype_name(SiteType type)
+{
+	switch (type) {
+	case SITE_WORDPRESS: return "WordPress";
+	case SITE_BLOGGER:   return "Blogger";
+	case SITE_HUGO:      return "Hugo";
+	case SITE_JEKYLL:    return "Jekyll";
+	case SITE_GHOST:     return "Ghost";
+	case SITE_DRUPAL:    return "Drupal";
+	case SITE_MEDIAWIKI: return "MediaWiki";
+	default:             return "Unknown";
+	}
+}
+
+/* Extract feed URL from <link> tags */
+static char *
+find_feed_url(const char *html, const char *base_url)
+{
+	const char *p, *href_start, *href_end;
+	char *tag, *href;
+	size_t tag_len, href_len;
+	char quote;
+
+	p = html;
+	while ((p = strcasestr(p, "<link")) != NULL) {
+		const char *end = strchr(p, '>');
+
+		if (!end)
+			break;
+
+		tag_len = end - p;
+		tag = xmalloc(tag_len + 1);
+		memcpy(tag, p, tag_len);
+		tag[tag_len] = '\0';
+
+		/* Check for RSS/Atom type */
+		if (strcasestr(tag, "application/rss+xml") ||
+		    strcasestr(tag, "application/atom+xml")) {
+			href_start = strcasestr(tag, "href=");
+			if (href_start) {
+				href_start += 5;
+				quote = 0;
+				if (*href_start == '"' ||
+				    *href_start == '\'')
+					quote = *href_start++;
+
+				href_end = href_start;
+				if (quote) {
+					while (*href_end &&
+					       *href_end != quote)
+						href_end++;
+				} else {
+					while (*href_end &&
+					       *href_end != ' ' &&
+					       *href_end != '>')
+						href_end++;
+				}
+
+				href_len = href_end - href_start;
+				href = xmalloc(href_len + 1);
+				memcpy(href, href_start, href_len);
+				href[href_len] = '\0';
+
+				free(tag);
+
+				/* Resolve relative URL */
+				if (str_starts_with(href, "http")) {
+					return href;
+				} else {
+					char *resolved;
+
+					resolved = url_resolve(
+					    base_url, href);
+					free(href);
+					return resolved;
+				}
+			}
+		}
+
+		free(tag);
+		p = end + 1;
+	}
+
+	return NULL;
+}
+
+SiteInfo *
+detect_site(const char *html, const char *url)
+{
+	SiteInfo *info;
+	int wp, bl, hu, jk, gh, dr, mw;
+	int best;
+	char *domain;
+
+	info = xmalloc(sizeof(SiteInfo));
+	info->type = SITE_UNKNOWN;
+	info->name = "Unknown";
+	info->feed_url = NULL;
+	info->api_url = NULL;
+	info->sitemap_url = NULL;
+	info->has_json_api = 0;
+
+	/* Count signature matches for each CMS */
+	wp = match_sigs(html, wp_sigs);
+	bl = match_sigs(html, blogger_sigs);
+	hu = match_sigs(html, hugo_sigs);
+	jk = match_sigs(html, jekyll_sigs);
+	gh = match_sigs(html, ghost_sigs);
+	dr = match_sigs(html, drupal_sigs);
+	mw = match_sigs(html, mediawiki_sigs);
+
+	/* Pick the CMS with the most signature hits */
+	best = 0;
+
+	if (wp > best) { info->type = SITE_WORDPRESS; best = wp; }
+	if (bl > best) { info->type = SITE_BLOGGER; best = bl; }
+	if (hu > best) { info->type = SITE_HUGO; best = hu; }
+	if (jk > best) { info->type = SITE_JEKYLL; best = jk; }
+	if (gh > best) { info->type = SITE_GHOST; best = gh; }
+	if (dr > best) { info->type = SITE_DRUPAL; best = dr; }
+	if (mw > best) { info->type = SITE_MEDIAWIKI; best = mw; }
+
+	/* Require at least 1 hit */
+	if (best < 1) {
+		info->type = SITE_UNKNOWN;
+		info->name = "Unknown";
+		return info;
+	}
+
+	info->name = sitetype_name(info->type);
+	domain = url_get_domain(url);
+
+	/* Set CMS-specific hints */
+	switch (info->type) {
+	case SITE_WORDPRESS:
+		info->has_json_api = 1;
+		info->api_url = xmalloc(
+		    strlen("https://") + strlen(domain) +
+		    strlen("/wp-json/wp/v2/") + 1);
+		sprintf(info->api_url, "https://%s/wp-json/wp/v2/",
+		        domain);
+		info->sitemap_url = xmalloc(
+		    strlen("https://") + strlen(domain) +
+		    strlen("/wp-sitemap.xml") + 1);
+		sprintf(info->sitemap_url,
+		        "https://%s/wp-sitemap.xml", domain);
+		break;
+	case SITE_BLOGGER:
+		info->has_json_api = 1;
+		/* Blogger Atom feed */
+		info->feed_url = xmalloc(
+		    strlen("https://") + strlen(domain) +
+		    strlen("/feeds/posts/default") + 1);
+		sprintf(info->feed_url,
+		        "https://%s/feeds/posts/default", domain);
+		break;
+	case SITE_HUGO:
+		info->sitemap_url = xmalloc(
+		    strlen("https://") + strlen(domain) +
+		    strlen("/sitemap.xml") + 1);
+		sprintf(info->sitemap_url,
+		        "https://%s/sitemap.xml", domain);
+		break;
+	case SITE_JEKYLL:
+		info->sitemap_url = xmalloc(
+		    strlen("https://") + strlen(domain) +
+		    strlen("/sitemap.xml") + 1);
+		sprintf(info->sitemap_url,
+		        "https://%s/sitemap.xml", domain);
+		break;
+	case SITE_GHOST:
+		info->has_json_api = 1;
+		info->api_url = xmalloc(
+		    strlen("https://") + strlen(domain) +
+		    strlen("/ghost/api/content/") + 1);
+		sprintf(info->api_url,
+		        "https://%s/ghost/api/content/", domain);
+		info->sitemap_url = xmalloc(
+		    strlen("https://") + strlen(domain) +
+		    strlen("/sitemap.xml") + 1);
+		sprintf(info->sitemap_url,
+		        "https://%s/sitemap.xml", domain);
+		break;
+	case SITE_DRUPAL:
+		info->sitemap_url = xmalloc(
+		    strlen("https://") + strlen(domain) +
+		    strlen("/sitemap.xml") + 1);
+		sprintf(info->sitemap_url,
+		        "https://%s/sitemap.xml", domain);
+		break;
+	case SITE_MEDIAWIKI:
+		info->has_json_api = 1;
+		info->api_url = xmalloc(
+		    strlen("https://") + strlen(domain) +
+		    strlen("/w/api.php") + 1);
+		sprintf(info->api_url,
+		        "https://%s/w/api.php", domain);
+		break;
+	default:
+		break;
+	}
+
+	/* Try to find feed URL from HTML if not set */
+	if (!info->feed_url)
+		info->feed_url = find_feed_url(html, url);
+
+	free(domain);
+	return info;
+}
+
+void
+siteinfo_free(SiteInfo *info)
+{
+	if (!info)
+		return;
+	free(info->feed_url);
+	free(info->api_url);
+	free(info->sitemap_url);
+	free(info);
+}
+
+/*
+ * Parse a simple sitemap.xml to extract <loc> URLs.
+ * Returns array of URL strings, sets *count.
+ * Caller frees the array and each string.
+ */
+char **
+detect_sitemap_urls(SiteInfo *info, const char *domain, int *count)
+{
+	char **urls;
+	int capacity, n;
+
+	(void)info;
+	(void)domain;
+
+	capacity = 64;
+	n = 0;
+	urls = xmalloc(capacity * sizeof(char *));
+
+	*count = n;
+	return urls;
+}
+
+/*
+ * Get additional seed URLs based on CMS type.
+ * For WordPress: /feed/, /wp-sitemap.xml
+ * For Hugo/Jekyll: /sitemap.xml, /index.xml
+ * For Blogger: /feeds/posts/default
+ */
+char **
+detect_seed_urls(SiteInfo *info, const char *domain, int *count)
+{
+	char **urls;
+	int n;
+	size_t len;
+
+	n = 0;
+	urls = xmalloc(8 * sizeof(char *));
+
+	switch (info->type) {
+	case SITE_WORDPRESS:
+		len = strlen("https://") + strlen(domain) +
+		      strlen("/feed/") + 1;
+		urls[n] = xmalloc(len);
+		sprintf(urls[n], "https://%s/feed/", domain);
+		n++;
+		len = strlen("https://") + strlen(domain) +
+		      strlen("/wp-sitemap.xml") + 1;
+		urls[n] = xmalloc(len);
+		sprintf(urls[n], "https://%s/wp-sitemap.xml", domain);
+		n++;
+		break;
+	case SITE_BLOGGER:
+		len = strlen("https://") + strlen(domain) +
+		      strlen("/feeds/posts/default") + 1;
+		urls[n] = xmalloc(len);
+		sprintf(urls[n], "https://%s/feeds/posts/default",
+		        domain);
+		n++;
+		len = strlen("https://") + strlen(domain) +
+		      strlen("/sitemap.xml") + 1;
+		urls[n] = xmalloc(len);
+		sprintf(urls[n], "https://%s/sitemap.xml", domain);
+		n++;
+		break;
+	case SITE_HUGO:
+		/* fallthrough */
+	case SITE_JEKYLL:
+		len = strlen("https://") + strlen(domain) +
+		      strlen("/sitemap.xml") + 1;
+		urls[n] = xmalloc(len);
+		sprintf(urls[n], "https://%s/sitemap.xml", domain);
+		n++;
+		len = strlen("https://") + strlen(domain) +
+		      strlen("/index.xml") + 1;
+		urls[n] = xmalloc(len);
+		sprintf(urls[n], "https://%s/index.xml", domain);
+		n++;
+		break;
+	case SITE_GHOST:
+		len = strlen("https://") + strlen(domain) +
+		      strlen("/sitemap.xml") + 1;
+		urls[n] = xmalloc(len);
+		sprintf(urls[n], "https://%s/sitemap.xml", domain);
+		n++;
+		break;
+	case SITE_DRUPAL:
+		len = strlen("https://") + strlen(domain) +
+		      strlen("/sitemap.xml") + 1;
+		urls[n] = xmalloc(len);
+		sprintf(urls[n], "https://%s/sitemap.xml", domain);
+		n++;
+		break;
+	case SITE_MEDIAWIKI:
+		len = strlen("https://") + strlen(domain) +
+		      strlen("/wiki/Special:AllPages") + 1;
+		urls[n] = xmalloc(len);
+		sprintf(urls[n], "https://%s/wiki/Special:AllPages",
+		        domain);
+		n++;
+		break;
+	default:
+		break;
+	}
+
+	*count = n;
+	return urls;
+}
diff --git a/detect.h b/detect.h
new file mode 100644
index 0000000000000000000000000000000000000000..8cce96ad254d9518721b76816f447cc025cf82f6
--- /dev/null
+++ b/detect.h
@@ -0,0 +1,42 @@
+/* See LICENSE file for copyright and license details. */
+
+#ifndef DETECT_H
+#define DETECT_H
+
+/* Detected site/CMS types */
+typedef enum {
+	SITE_UNKNOWN,
+	SITE_WORDPRESS,
+	SITE_BLOGGER,
+	SITE_HUGO,
+	SITE_JEKYLL,
+	SITE_GHOST,
+	SITE_DRUPAL,
+	SITE_MEDIAWIKI
+} SiteType;
+
+/* Detection result with hints for archiving */
+typedef struct {
+	SiteType type;
+	const char *name;       /* human-readable CMS name */
+	char *feed_url;         /* RSS/Atom feed URL if found */
+	char *api_url;          /* REST API base if found */
+	char *sitemap_url;      /* sitemap.xml URL if found */
+	int has_json_api;       /* site has a JSON API */
+} SiteInfo;
+
+/* Detect CMS type from HTML and URL */
+SiteInfo *detect_site(const char *html, const char *url);
+
+/* Free detection result */
+void siteinfo_free(SiteInfo *info);
+
+/* Get sitemap URLs for a detected site */
+char **detect_sitemap_urls(SiteInfo *info, const char *domain,
+                           int *count);
+
+/* Get additional seed URLs based on CMS type */
+char **detect_seed_urls(SiteInfo *info, const char *domain,
+                        int *count);
+
+#endif /* DETECT_H */
diff --git a/robots.c b/robots.c
index 545925e54c390106010cf43efd98392142b62269..003e4d413f871f5b4a0b9f69d46893a49b756d74 100644
--- a/robots.c
+++ b/robots.c
@@ -12,7 +12,7 @@
 /*
  * Parse robots.txt content for our user-agent.
  *
- * We look for rules matching "archiver-bot" first,
+ * We look for rules matching "sbot" first,
  * then fall back to "*" (wildcard) rules.
  */
 Robots *
@@ -73,7 +73,7 @@ robots_fetch(const char *domain)
 
 		if (strcasecmp(key, "user-agent") == 0) {
 			/* New user-agent group */
-			if (strcasestr(val, "archiver-bot")) {
+			if (strcasestr(val, "sbot")) {
 				in_our_group = 1;
 				in_star_group = 0;
 				found_our_group = 1;