diff --git a/basis/furnace/actions/actions.factor b/basis/furnace/actions/actions.factor
index 6c56a8ad7b..72a7b76d23 100644
--- a/basis/furnace/actions/actions.factor
+++ b/basis/furnace/actions/actions.factor
@@ -6,7 +6,7 @@ io arrays math boxes splitting urls
 xml.entities
 http.server
 http.server.responses
-furnace
+furnace.utilities
 furnace.redirection
 furnace.conversations
 html.forms
diff --git a/basis/furnace/asides/asides.factor b/basis/furnace/asides/asides.factor
index 6d4196cf0b..7489d19f94 100644
--- a/basis/furnace/asides/asides.factor
+++ b/basis/furnace/asides/asides.factor
@@ -4,9 +4,9 @@ USING: namespaces assocs kernel sequences accessors hashtables
 urls db.types db.tuples math.parser fry logging combinators
 html.templates.chloe.syntax
 http http.server http.server.filters http.server.redirection
-furnace
 furnace.cache
 furnace.sessions
+furnace.utilities
 furnace.redirection ;
 IN: furnace.asides
 
diff --git a/basis/furnace/auth/auth.factor b/basis/furnace/auth/auth.factor
index 1b5c5f9e73..b9c961941c 100644
--- a/basis/furnace/auth/auth.factor
+++ b/basis/furnace/auth/auth.factor
@@ -8,8 +8,8 @@ html.forms
 http.server
 http.server.filters
 http.server.dispatchers
-furnace
 furnace.actions
+furnace.utilities
 furnace.redirection
 furnace.boilerplate
 furnace.auth.providers
diff --git a/basis/furnace/auth/features/recover-password/recover-password.factor b/basis/furnace/auth/features/recover-password/recover-password.factor
index 5885aaef61..77be30a2d1 100644
--- a/basis/furnace/auth/features/recover-password/recover-password.factor
+++ b/basis/furnace/auth/features/recover-password/recover-password.factor
@@ -1,11 +1,10 @@
 ! Copyright (c) 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: namespaces make accessors kernel assocs arrays io.sockets
-threads fry urls smtp validators html.forms present
-http http.server.responses http.server.redirection
-http.server.dispatchers
-furnace furnace.actions furnace.auth furnace.auth.providers
-furnace.redirection ;
+threads fry urls smtp validators html.forms present http
+http.server.responses http.server.redirection
+http.server.dispatchers furnace.actions furnace.auth
+furnace.auth.providers furnace.redirection furnace.utilities ;
 IN: furnace.auth.features.recover-password
 
 SYMBOL: lost-password-from
diff --git a/basis/furnace/auth/features/registration/registration.factor b/basis/furnace/auth/features/registration/registration.factor
index 0484c11727..7f73f0c404 100644
--- a/basis/furnace/auth/features/registration/registration.factor
+++ b/basis/furnace/auth/features/registration/registration.factor
@@ -2,7 +2,7 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: accessors assocs kernel namespaces validators html.forms urls
 http.server.dispatchers
-furnace furnace.auth furnace.auth.providers furnace.actions
+furnace.auth furnace.auth.providers furnace.actions
 furnace.redirection ;
 IN: furnace.auth.features.registration
 
diff --git a/basis/furnace/auth/login/login.factor b/basis/furnace/auth/login/login.factor
index 4fc4e7e8be..fff301eb2f 100644
--- a/basis/furnace/auth/login/login.factor
+++ b/basis/furnace/auth/login/login.factor
@@ -3,7 +3,6 @@
 USING: kernel accessors namespaces sequences math.parser
 calendar validators urls logging html.forms
 http http.server http.server.dispatchers
-furnace
 furnace.auth
 furnace.asides
 furnace.actions
diff --git a/basis/furnace/boilerplate/boilerplate.factor b/basis/furnace/boilerplate/boilerplate.factor
index 946372e1f8..95e93f2ee8 100644
--- a/basis/furnace/boilerplate/boilerplate.factor
+++ b/basis/furnace/boilerplate/boilerplate.factor
@@ -1,12 +1,13 @@
 ! Copyright (c) 2008 Slava Pestov
 ! See http://factorcode.org/license.txt for BSD license.
-USING: accessors kernel math.order namespaces furnace combinators.short-circuit
+USING: accessors kernel math.order namespaces combinators.short-circuit
 html.forms
 html.templates
 html.templates.chloe
 locals
 http.server
-http.server.filters ;
+http.server.filters
+furnace.utilities ;
 IN: furnace.boilerplate
 
 TUPLE: boilerplate < filter-responder template init ;
diff --git a/basis/furnace/chloe-tags/chloe-tags.factor b/basis/furnace/chloe-tags/chloe-tags.factor
index 697c885a01..8ab70ded7b 100644
--- a/basis/furnace/chloe-tags/chloe-tags.factor
+++ b/basis/furnace/chloe-tags/chloe-tags.factor
@@ -19,7 +19,7 @@ http
 http.server
 http.server.redirection
 http.server.responses
-furnace ;
+furnace.utilities ;
 QUALIFIED-WITH: assocs a
 IN: furnace.chloe-tags
 
diff --git a/basis/furnace/conversations/conversations.factor b/basis/furnace/conversations/conversations.factor
index 671296ce57..266958c8a4 100644
--- a/basis/furnace/conversations/conversations.factor
+++ b/basis/furnace/conversations/conversations.factor
@@ -4,10 +4,10 @@ USING: namespaces assocs kernel sequences accessors hashtables
 urls db.types db.tuples math.parser fry logging combinators
 html.templates.chloe.syntax
 http http.server http.server.filters http.server.redirection
-furnace
 furnace.cache
 furnace.scopes
 furnace.sessions
+furnace.utilities
 furnace.redirection ;
 IN: furnace.conversations
 
diff --git a/basis/furnace/furnace-docs.factor b/basis/furnace/furnace-docs.factor
index 911433d100..c6191b295e 100644
--- a/basis/furnace/furnace-docs.factor
+++ b/basis/furnace/furnace-docs.factor
@@ -2,129 +2,6 @@ USING: assocs help.markup help.syntax kernel
 quotations sequences strings urls xml.data http ;
 IN: furnace
 
-HELP: adjust-redirect-url
-{ $values { "url" url } { "url'" url } }
-{ $description "Adjusts a redirection URL by filtering the URL's query parameters through the " { $link modify-redirect-query } " generic word on every responder involved in handling the current request." } ;
-
-HELP: adjust-url
-{ $values { "url" url } { "url'" url } }
-{ $description "Adjusts a link URL by filtering the URL's query parameters through the " { $link modify-query } " generic word on every responder involved in handling the current request." } ;
-
-HELP: client-state
-{ $values { "key" string } { "value/f" { $maybe string } } }
-{ $description "Looks up a cookie (if the current request is a GET or HEAD request) or a POST parameter (if the current request is a POST request)." }
-{ $notes "This word is used by session management, conversation scope and asides." } ;
-
-HELP: each-responder
-{ $values { "quot" { $quotation "( responder -- )" } } }
-{ $description "Applies the quotation to each responder involved in processing the current request." } ;
-
-HELP: hidden-form-field
-{ $values { "value" string } { "name" string } }
-{ $description "Renders an HTML hidden form field tag." }
-{ $notes "This word is used by session management, conversation scope and asides." }
-{ $examples
-    { $example
-        "USING: furnace io ;"
-        "\"bar\" \"foo\" hidden-form-field nl"
-        "<input type='hidden' name='foo' value='bar'/>"
-    }
-} ;
-
-HELP: link-attr
-{ $values { "tag" tag } { "responder" "a responder" } }
-{ $contract "Modifies an XHTML " { $snippet "a" } " tag." }
-{ $notes "This word is called by " { $link "html.templates.chloe.tags.form" } "." }
-{ $examples "Conversation scope adds attributes to link tags." } ;
-
-HELP: modify-form
-{ $values { "responder" "a responder" } }
-{ $contract "Emits hidden form fields using " { $link hidden-form-field } "." }
-{ $notes "This word is called by " { $link "html.templates.chloe.tags.form" } "." }
-{ $examples "Session management, conversation scope and asides use hidden form fields to pass state." } ;
-
-HELP: modify-query
-{ $values { "query" assoc } { "responder" "a responder" } { "query'" assoc } }
-{ $contract "Modifies the query parameters of a URL destined to be displayed as a link." }
-{ $notes "This word is called by " { $link "html.templates.chloe.tags.form" } "." }
-{ $examples "Asides add query parameters to URLs." } ;
-
-HELP: modify-redirect-query
-{ $values { "query" assoc } { "responder" "a responder" } { "query'" assoc } }
-{ $contract "Modifies the query parameters of a URL destined to be used with a redirect." }
-{ $notes "This word is called by " { $link "furnace.redirection" } "." }
-{ $examples "Conversation scope and asides add query parameters to redirect URLs." } ;
-
-HELP: nested-responders
-{ $values { "seq" "a sequence of responders" } }
-{ $description "" } ;
-
-HELP: referrer
-{ $values { "referrer/f" { $maybe string } } }
-{ $description "Outputs the current request's referrer URL." } ;
-
-HELP: request-params
-{ $values { "request" request } { "assoc" assoc } }
-{ $description "Outputs the query parameters (if the current request is a GET or HEAD request) or the POST parameters (if the current request is a POST request)." } ;
-
-HELP: resolve-base-path
-{ $values { "string" string } { "string'" string } }
-{ $description "" } ;
-
-HELP: resolve-template-path
-{ $values { "pair" "a pair with shape " { $snippet "{ class string }" } } { "path" "a pathname string" } }
-{ $description "" } ;
-
-HELP: same-host?
-{ $values { "url" url } { "?" "a boolean" } }
-{ $description "Tests if the given URL is located on the same host as the URL of the current request." } ;
-
-HELP: user-agent
-{ $values { "user-agent" { $maybe string } } }
-{ $description "Outputs the user agent reported by the client for the current request." } ;
-
-HELP: vocab-path
-{ $values { "vocab" "a vocabulary specifier" } { "path" "a pathname string" } }
-{ $description "" } ;
-
-HELP: exit-with
-{ $values { "value" object } }
-{ $description "Exits from an outer " { $link with-exit-continuation } "." } ;
-
-HELP: with-exit-continuation
-{ $values { "quot" { $quotation { "( -- value )" } } } { "value" "a value returned by the quotation or an " { $link exit-with } " invocation" } }
-{ $description "Runs a quotation with the " { $link exit-continuation } " variable bound. Calling " { $link exit-with } " in the quotation will immediately return." }
-{ $notes "Furnace actions and authentication realms wrap their execution in this combinator, allowing form validation failures and login requests, respectively, to immediately return an HTTP response to the client without running any more responder code." } ;
-
-ARTICLE: "furnace.extension-points" "Furnace extension points"
-"Furnace features such as session management, conversation scope and asides need to modify URLs in links and redirects, and insert hidden form fields, to implement state on top of the stateless HTTP protocol. In order to decouple the server-side state management code from the HTML templating code, a series of hooks are used."
-$nl
-"Responders can implement methods on the following generic words:"
-{ $subsection modify-query }
-{ $subsection modify-redirect-query }
-{ $subsection link-attr }
-{ $subsection modify-form }
-"Presentation-level code can call the following words:"
-{ $subsection adjust-url }
-{ $subsection adjust-redirect-url } ;
-
-ARTICLE: "furnace.misc" "Miscellaneous Furnace features"
-"Inspecting the chain of responders handling the current request:"
-{ $subsection nested-responders }
-{ $subsection each-responder }
-{ $subsection resolve-base-path }
-"Vocabulary root-relative resources:"
-{ $subsection vocab-path }
-{ $subsection resolve-template-path }
-"Early return from a responder:"
-{ $subsection with-exit-continuation }
-{ $subsection exit-with }
-"Other useful words:"
-{ $subsection hidden-form-field }
-{ $subsection request-params }
-{ $subsection client-state }
-{ $subsection user-agent } ;
-
 ARTICLE: "furnace.persistence" "Furnace persistence layer"
 { $subsection "furnace.db" }
 "Server-side state:"
diff --git a/basis/furnace/furnace-tests.factor b/basis/furnace/furnace-tests.factor
index 00e4f6f152..f6e5434997 100644
--- a/basis/furnace/furnace-tests.factor
+++ b/basis/furnace/furnace-tests.factor
@@ -1,7 +1,7 @@
 IN: furnace.tests
 USING: http http.server.dispatchers http.server.responses
-http.server furnace tools.test kernel namespaces accessors
-io.streams.string urls ;
+http.server furnace furnace.utilities tools.test kernel
+namespaces accessors io.streams.string urls ;
 TUPLE: funny-dispatcher < dispatcher ;
 
 : <funny-dispatcher> funny-dispatcher new-dispatcher ;
diff --git a/basis/furnace/furnace.factor b/basis/furnace/furnace.factor
index 29eb00a8f4..adafb21524 100644
--- a/basis/furnace/furnace.factor
+++ b/basis/furnace/furnace.factor
@@ -1,133 +1,7 @@
 ! Copyright (C) 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: namespaces make assocs sequences kernel classes splitting
-vocabs.loader accessors strings combinators arrays
-continuations present fry
-urls html.elements
-http http.server http.server.redirection http.server.remapping ;
 IN: furnace
 
-: nested-responders ( -- seq )
-    responder-nesting get values ;
-
-: each-responder ( quot -- )
-   nested-responders swap each ; inline
-
-: base-path ( string -- pair )
-    dup responder-nesting get
-    [ second class superclasses [ name>> = ] with contains? ] with find nip
-    [ first ] [ "No such responder: " swap append throw ] ?if ;
-
-: resolve-base-path ( string -- string' )
-    "$" ?head [
-        [
-            "/" split1 [ base-path [  "/" % % ] each "/" % ] dip %
-        ] "" make
-    ] when ;
-
-: vocab-path ( vocab -- path )
-    dup vocab-dir vocab-append-path ;
-
-: resolve-template-path ( pair -- path )
-    [
-        first2 [ vocabulary>> vocab-path % ] [ "/" % % ] bi*
-    ] "" make ;
-
-GENERIC: modify-query ( query responder -- query' )
-
-M: object modify-query drop ;
-
-GENERIC: modify-redirect-query ( query responder -- query' )
-
-M: object modify-redirect-query drop ;
-
-GENERIC: adjust-url ( url -- url' )
-
-M: url adjust-url
-    clone
-        [ [ modify-query ] each-responder ] change-query
-        [ resolve-base-path ] change-path
-    relative-to-request ;
-
-M: string adjust-url ;
-
-GENERIC: adjust-redirect-url ( url -- url' )
-
-M: url adjust-redirect-url
-    adjust-url
-    [ [ modify-redirect-query ] each-responder ] change-query ;
-
-M: string adjust-redirect-url ;
-
-GENERIC: link-attr ( tag responder -- )
-
-M: object link-attr 2drop ;
-
-GENERIC: modify-form ( responder -- )
-
-M: object modify-form drop ;
-
-: hidden-form-field ( value name -- )
-    over [
-        <input
-            "hidden" =type
-            =name
-            present =value
-        input/>
-    ] [ 2drop ] if ;
-
-: nested-forms-key "__n" ;
-
-: request-params ( request -- assoc )
-    dup method>> {
-        { "GET" [ url>> query>> ] }
-        { "HEAD" [ url>> query>> ] }
-        { "POST" [
-            post-data>>
-            dup content-type>> "application/x-www-form-urlencoded" =
-            [ content>> ] [ drop f ] if
-        ] }
-    } case ;
-
-: referrer ( -- referrer/f )
-    #! Typo is intentional, it's in the HTTP spec!
-    "referer" request get header>> at
-    dup [ >url ensure-port [ remap-port ] change-port ] when ;
-
-: user-agent ( -- user-agent )
-    "user-agent" request get header>> at "" or ;
-
-: same-host? ( url -- ? )
-    dup [
-        url get [
-            [ protocol>> ]
-            [ host>> ]
-            [ port>> remap-port ]
-            tri 3array
-        ] bi@ =
-    ] when ;
-
-: cookie-client-state ( key request -- value/f )
-    swap get-cookie dup [ value>> ] when ;
-
-: post-client-state ( key request -- value/f )
-    request-params at ;
-
-: client-state ( key -- value/f )
-    request get dup method>> {
-        { "GET" [ cookie-client-state ] }
-        { "HEAD" [ cookie-client-state ] }
-        { "POST" [ post-client-state ] }
-    } case ;
-
-SYMBOL: exit-continuation
-
-: exit-with ( value -- )
-    exit-continuation get continue-with ;
-
-: with-exit-continuation ( quot -- value )
-    '[ exit-continuation set @ ] callcc1 exit-continuation off ;
-
 USE: vocabs.loader
 "furnace.actions" require
 "furnace.alloy" require
diff --git a/basis/furnace/redirection/redirection.factor b/basis/furnace/redirection/redirection.factor
index c5a63a795c..01297288dc 100644
--- a/basis/furnace/redirection/redirection.factor
+++ b/basis/furnace/redirection/redirection.factor
@@ -2,7 +2,7 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: kernel accessors combinators namespaces fry urls http
 http.server http.server.redirection http.server.responses
-http.server.remapping http.server.filters furnace ;
+http.server.remapping http.server.filters furnace.utilities ;
 IN: furnace.redirection
 
 : <redirect> ( url -- response )
diff --git a/basis/furnace/referrer/referrer-docs.factor b/basis/furnace/referrer/referrer-docs.factor
index 599461c37c..b57bcb262b 100644
--- a/basis/furnace/referrer/referrer-docs.factor
+++ b/basis/furnace/referrer/referrer-docs.factor
@@ -1,5 +1,5 @@
 USING: help.markup help.syntax io.streams.string
-furnace ;
+furnace.utilities ;
 IN: furnace.referrer
 
 HELP: <check-form-submissions>
diff --git a/basis/furnace/referrer/referrer.factor b/basis/furnace/referrer/referrer.factor
index 003028ab1e..e5666c2698 100644
--- a/basis/furnace/referrer/referrer.factor
+++ b/basis/furnace/referrer/referrer.factor
@@ -1,7 +1,7 @@
 ! Copyright (C) 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: accessors kernel http.server http.server.filters
-http.server.responses furnace ;
+http.server.responses furnace.utilities ;
 IN: furnace.referrer
 
 TUPLE: referrer-check < filter-responder quot ;
diff --git a/basis/furnace/sessions/sessions-tests.factor b/basis/furnace/sessions/sessions-tests.factor
index 6bb3c1cd69..907e657125 100644
--- a/basis/furnace/sessions/sessions-tests.factor
+++ b/basis/furnace/sessions/sessions-tests.factor
@@ -3,7 +3,8 @@ USING: tools.test http furnace.sessions furnace.actions
 http.server http.server.responses math namespaces make kernel
 accessors io.sockets io.servers.connection prettyprint
 io.streams.string io.files splitting destructors sequences db
-db.tuples db.sqlite continuations urls math.parser furnace ;
+db.tuples db.sqlite continuations urls math.parser furnace
+furnace.utilities ;
 
 : with-session
     [
diff --git a/basis/furnace/sessions/sessions.factor b/basis/furnace/sessions/sessions.factor
index b7120aaf11..cde95f2831 100644
--- a/basis/furnace/sessions/sessions.factor
+++ b/basis/furnace/sessions/sessions.factor
@@ -1,13 +1,11 @@
 ! Copyright (C) 2008 Doug Coleman, Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: assocs kernel math.intervals math.parser namespaces
-strings random accessors quotations hashtables sequences continuations
-fry calendar combinators combinators.short-circuit destructors alarms
-io.servers.connection
-db db.tuples db.types
+strings random accessors quotations hashtables sequences
+continuations fry calendar combinators combinators.short-circuit
+destructors alarms io.servers.connection db db.tuples db.types
 http http.server http.server.dispatchers http.server.filters
-html.elements
-furnace furnace.cache furnace.scopes ;
+html.elements furnace.cache furnace.scopes furnace.utilities ;
 IN: furnace.sessions
 
 TUPLE: session < scope user-agent client ;
diff --git a/basis/furnace/syndication/syndication.factor b/basis/furnace/syndication/syndication.factor
index a326e62f02..876aaf8c98 100644
--- a/basis/furnace/syndication/syndication.factor
+++ b/basis/furnace/syndication/syndication.factor
@@ -1,9 +1,8 @@
 ! Copyright (C) 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: accessors kernel sequences fry
-combinators syndication
-http.server.responses http.server.redirection
-furnace furnace.actions ;
+USING: accessors kernel sequences fry combinators syndication
+http.server.responses http.server.redirection furnace.actions
+furnace.utilities ;
 IN: furnace.syndication
 
 GENERIC: feed-entry-title ( object -- string )
diff --git a/basis/furnace/utilities/utilities-docs.factor b/basis/furnace/utilities/utilities-docs.factor
new file mode 100644
index 0000000000..1402e9c0ca
--- /dev/null
+++ b/basis/furnace/utilities/utilities-docs.factor
@@ -0,0 +1,126 @@
+USING: assocs help.markup help.syntax kernel
+quotations sequences strings urls xml.data http ;
+IN: furnace.utilities
+
+HELP: adjust-redirect-url
+{ $values { "url" url } { "url'" url } }
+{ $description "Adjusts a redirection URL by filtering the URL's query parameters through the " { $link modify-redirect-query } " generic word on every responder involved in handling the current request." } ;
+
+HELP: adjust-url
+{ $values { "url" url } { "url'" url } }
+{ $description "Adjusts a link URL by filtering the URL's query parameters through the " { $link modify-query } " generic word on every responder involved in handling the current request." } ;
+
+HELP: client-state
+{ $values { "key" string } { "value/f" { $maybe string } } }
+{ $description "Looks up a cookie (if the current request is a GET or HEAD request) or a POST parameter (if the current request is a POST request)." }
+{ $notes "This word is used by session management, conversation scope and asides." } ;
+
+HELP: each-responder
+{ $values { "quot" { $quotation "( responder -- )" } } }
+{ $description "Applies the quotation to each responder involved in processing the current request." } ;
+
+HELP: hidden-form-field
+{ $values { "value" string } { "name" string } }
+{ $description "Renders an HTML hidden form field tag." }
+{ $notes "This word is used by session management, conversation scope and asides." }
+{ $examples
+    { $example
+        "USING: furnace.utilities io ;"
+        "\"bar\" \"foo\" hidden-form-field nl"
+        "<input type='hidden' name='foo' value='bar'/>"
+    }
+} ;
+
+HELP: link-attr
+{ $values { "tag" tag } { "responder" "a responder" } }
+{ $contract "Modifies an XHTML " { $snippet "a" } " tag." }
+{ $notes "This word is called by " { $link "html.templates.chloe.tags.form" } "." }
+{ $examples "Conversation scope adds attributes to link tags." } ;
+
+HELP: modify-form
+{ $values { "responder" "a responder" } }
+{ $contract "Emits hidden form fields using " { $link hidden-form-field } "." }
+{ $notes "This word is called by " { $link "html.templates.chloe.tags.form" } "." }
+{ $examples "Session management, conversation scope and asides use hidden form fields to pass state." } ;
+
+HELP: modify-query
+{ $values { "query" assoc } { "responder" "a responder" } { "query'" assoc } }
+{ $contract "Modifies the query parameters of a URL destined to be displayed as a link." }
+{ $notes "This word is called by " { $link "html.templates.chloe.tags.form" } "." }
+{ $examples "Asides add query parameters to URLs." } ;
+
+HELP: modify-redirect-query
+{ $values { "query" assoc } { "responder" "a responder" } { "query'" assoc } }
+{ $contract "Modifies the query parameters of a URL destined to be used with a redirect." }
+{ $notes "This word is called by " { $link "furnace.redirection" } "." }
+{ $examples "Conversation scope and asides add query parameters to redirect URLs." } ;
+
+HELP: nested-responders
+{ $values { "seq" "a sequence of responders" } }
+{ $description "" } ;
+
+HELP: referrer
+{ $values { "referrer/f" { $maybe string } } }
+{ $description "Outputs the current request's referrer URL." } ;
+
+HELP: request-params
+{ $values { "request" request } { "assoc" assoc } }
+{ $description "Outputs the query parameters (if the current request is a GET or HEAD request) or the POST parameters (if the current request is a POST request)." } ;
+
+HELP: resolve-base-path
+{ $values { "string" string } { "string'" string } }
+{ $description "" } ;
+
+HELP: resolve-template-path
+{ $values { "pair" "a pair with shape " { $snippet "{ class string }" } } { "path" "a pathname string" } }
+{ $description "" } ;
+
+HELP: same-host?
+{ $values { "url" url } { "?" "a boolean" } }
+{ $description "Tests if the given URL is located on the same host as the URL of the current request." } ;
+
+HELP: user-agent
+{ $values { "user-agent" { $maybe string } } }
+{ $description "Outputs the user agent reported by the client for the current request." } ;
+
+HELP: vocab-path
+{ $values { "vocab" "a vocabulary specifier" } { "path" "a pathname string" } }
+{ $description "" } ;
+
+HELP: exit-with
+{ $values { "value" object } }
+{ $description "Exits from an outer " { $link with-exit-continuation } "." } ;
+
+HELP: with-exit-continuation
+{ $values { "quot" { $quotation { "( -- value )" } } } { "value" "a value returned by the quotation or an " { $link exit-with } " invocation" } }
+{ $description "Runs a quotation with the " { $link exit-continuation } " variable bound. Calling " { $link exit-with } " in the quotation will immediately return." }
+{ $notes "Furnace actions and authentication realms wrap their execution in this combinator, allowing form validation failures and login requests, respectively, to immediately return an HTTP response to the client without running any more responder code." } ;
+
+ARTICLE: "furnace.extension-points" "Furnace extension points"
+"Furnace features such as session management, conversation scope and asides need to modify URLs in links and redirects, and insert hidden form fields, to implement state on top of the stateless HTTP protocol. In order to decouple the server-side state management code from the HTML templating code, a series of hooks are used."
+$nl
+"Responders can implement methods on the following generic words:"
+{ $subsection modify-query }
+{ $subsection modify-redirect-query }
+{ $subsection link-attr }
+{ $subsection modify-form }
+"Presentation-level code can call the following words:"
+{ $subsection adjust-url }
+{ $subsection adjust-redirect-url } ;
+
+ARTICLE: "furnace.misc" "Miscellaneous Furnace features"
+"Inspecting the chain of responders handling the current request:"
+{ $subsection nested-responders }
+{ $subsection each-responder }
+{ $subsection resolve-base-path }
+"Vocabulary root-relative resources:"
+{ $subsection vocab-path }
+{ $subsection resolve-template-path }
+"Early return from a responder:"
+{ $subsection with-exit-continuation }
+{ $subsection exit-with }
+"Other useful words:"
+{ $subsection hidden-form-field }
+{ $subsection request-params }
+{ $subsection client-state }
+{ $subsection user-agent } ;
diff --git a/basis/furnace/utilities/utilities.factor b/basis/furnace/utilities/utilities.factor
index 4bfbdcd943..f2b71fb89f 100644
--- a/basis/furnace/utilities/utilities.factor
+++ b/basis/furnace/utilities/utilities.factor
@@ -1,6 +1,9 @@
-! Copyright (c) 2008 Slava Pestov
+! Copyright (C) 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: accessors words kernel sequences splitting ;
+USING: namespaces make assocs sequences kernel classes splitting
+words vocabs.loader accessors strings combinators arrays
+continuations present fry urls html.elements http http.server
+http.server.redirection http.server.remapping ;
 IN: furnace.utilities
 
 : word>string ( word -- string )
@@ -17,3 +20,124 @@ ERROR: no-such-word name vocab ;
 
 : strings>words ( seq -- seq' )
     [ string>word ] map ;
+
+: nested-responders ( -- seq )
+    responder-nesting get values ;
+
+: each-responder ( quot -- )
+   nested-responders swap each ; inline
+
+: base-path ( string -- pair )
+    dup responder-nesting get
+    [ second class superclasses [ name>> = ] with contains? ] with find nip
+    [ first ] [ "No such responder: " swap append throw ] ?if ;
+
+: resolve-base-path ( string -- string' )
+    "$" ?head [
+        [
+            "/" split1 [ base-path [  "/" % % ] each "/" % ] dip %
+        ] "" make
+    ] when ;
+
+: vocab-path ( vocab -- path )
+    dup vocab-dir vocab-append-path ;
+
+: resolve-template-path ( pair -- path )
+    [
+        first2 [ vocabulary>> vocab-path % ] [ "/" % % ] bi*
+    ] "" make ;
+
+GENERIC: modify-query ( query responder -- query' )
+
+M: object modify-query drop ;
+
+GENERIC: modify-redirect-query ( query responder -- query' )
+
+M: object modify-redirect-query drop ;
+
+GENERIC: adjust-url ( url -- url' )
+
+M: url adjust-url
+    clone
+        [ [ modify-query ] each-responder ] change-query
+        [ resolve-base-path ] change-path
+    relative-to-request ;
+
+M: string adjust-url ;
+
+GENERIC: adjust-redirect-url ( url -- url' )
+
+M: url adjust-redirect-url
+    adjust-url
+    [ [ modify-redirect-query ] each-responder ] change-query ;
+
+M: string adjust-redirect-url ;
+
+GENERIC: link-attr ( tag responder -- )
+
+M: object link-attr 2drop ;
+
+GENERIC: modify-form ( responder -- )
+
+M: object modify-form drop ;
+
+: hidden-form-field ( value name -- )
+    over [
+        <input
+            "hidden" =type
+            =name
+            present =value
+        input/>
+    ] [ 2drop ] if ;
+
+: nested-forms-key "__n" ;
+
+: request-params ( request -- assoc )
+    dup method>> {
+        { "GET" [ url>> query>> ] }
+        { "HEAD" [ url>> query>> ] }
+        { "POST" [
+            post-data>>
+            dup content-type>> "application/x-www-form-urlencoded" =
+            [ content>> ] [ drop f ] if
+        ] }
+    } case ;
+
+: referrer ( -- referrer/f )
+    #! Typo is intentional, it's in the HTTP spec!
+    "referer" request get header>> at
+    dup [ >url ensure-port [ remap-port ] change-port ] when ;
+
+: user-agent ( -- user-agent )
+    "user-agent" request get header>> at "" or ;
+
+: same-host? ( url -- ? )
+    dup [
+        url get [
+            [ protocol>> ]
+            [ host>> ]
+            [ port>> remap-port ]
+            tri 3array
+        ] bi@ =
+    ] when ;
+
+: cookie-client-state ( key request -- value/f )
+    swap get-cookie dup [ value>> ] when ;
+
+: post-client-state ( key request -- value/f )
+    request-params at ;
+
+: client-state ( key -- value/f )
+    request get dup method>> {
+        { "GET" [ cookie-client-state ] }
+        { "HEAD" [ cookie-client-state ] }
+        { "POST" [ post-client-state ] }
+    } case ;
+
+SYMBOL: exit-continuation
+
+: exit-with ( value -- )
+    exit-continuation get continue-with ;
+
+: with-exit-continuation ( quot -- value )
+    '[ exit-continuation set @ ] callcc1 exit-continuation off ;
diff --git a/extra/webapps/wiki/wiki.factor b/extra/webapps/wiki/wiki.factor
index b833cc8cc2..b78dc25d79 100644
--- a/extra/webapps/wiki/wiki.factor
+++ b/extra/webapps/wiki/wiki.factor
@@ -7,8 +7,8 @@ syndication farkup
 html.components html.forms
 http.server
 http.server.dispatchers
-furnace
 furnace.actions
+furnace.utilities
 furnace.redirection
 furnace.auth
 furnace.auth.login