{"id":2426,"date":"2026-07-29T14:15:39","date_gmt":"2026-07-29T12:15:39","guid":{"rendered":"https:\/\/askem.eu\/?p=2426"},"modified":"2026-07-29T14:15:44","modified_gmt":"2026-07-29T12:15:44","slug":"haystack-orchestrer-rag-et-agents-ia-en-pipelines-maitrises","status":"publish","type":"post","link":"https:\/\/askem.eu\/en\/2026\/07\/29\/haystack-orchestrer-rag-et-agents-ia-en-pipelines-maitrises\/","title":{"rendered":"Haystack : orchestrer RAG et agents IA en pipelines ma\u00eetris\u00e9s"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Haystack&nbsp;: orchestrer RAG et agents IA en pipelines ma\u00eetris\u00e9s<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La plupart des frameworks IA tombent dans un de deux pi\u00e8ges&nbsp;: soit ils enferment dans une logique de cha\u00eene rigide, soit ils laissent l&rsquo;agent d\u00e9cider de tout sans contr\u00f4le. <a href=\"https:\/\/github.com\/deepset-ai\/haystack\">Haystack<\/a>, le framework open source de deepset (licence Apache 2.0), propose une troisi\u00e8me voie&nbsp;: d\u00e9crire son application comme un <strong>pipeline modulaire et explicite<\/strong>, o\u00f9 chaque \u00e9tape (r\u00e9cup\u00e9ration, routage, m\u00e9moire, appel d&rsquo;outil, g\u00e9n\u00e9ration, \u00e9valuation) est un composant que l&rsquo;on branche et que l&rsquo;on remplace. C&rsquo;est l&rsquo;ing\u00e9nierie de contexte trait\u00e9e comme une architecture, pas comme une suite d&rsquo;appels au hasard.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour qui construit une vraie application en production, et pas seulement une d\u00e9monstration, c&rsquo;est exactement le niveau de ma\u00eetrise attendu&nbsp;: on voit comment l&rsquo;information circule, on en contr\u00f4le chaque maillon, et on peut faire \u00e9voluer une brique sans tout casser.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ce qui distingue Haystack<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Haystack ne se contente pas d&rsquo;encha\u00eener des appels. Il repose sur quelques partis pris clairs&nbsp;:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Pipelines explicites<\/strong>&nbsp;: un graphe orient\u00e9 de composants, avec branches et boucles, qui rend lisible le chemin r\u00e9el de chaque requ\u00eate plut\u00f4t qu&rsquo;une bo\u00eete noire.<\/li>\n\n\n\n<li><strong>Agents et RAG avec les m\u00eames primitives<\/strong>&nbsp;: la version 2.x int\u00e8gre un composant Agent de premier rang qui se place dans un pipeline \u00e0 c\u00f4t\u00e9 des r\u00e9cup\u00e9rateurs et des g\u00e9n\u00e9rateurs. Un m\u00eame socle exprime aussi bien un RAG pur qu&rsquo;un workflow agentique.<\/li>\n\n\n\n<li><strong>D\u00e9ploiement d\u00e9claratif en YAML<\/strong>&nbsp;: un pipeline se s\u00e9rialise en fichier, donc se versionne, se relit et se red\u00e9ploie sans r\u00e9\u00e9crire de code.<\/li>\n\n\n\n<li><strong>Ind\u00e9pendance du fournisseur<\/strong>&nbsp;: Haystack se branche aussi bien sur un mod\u00e8le local que sur une API distante, ce qui laisse le choix du curseur entre souverainet\u00e9 et commodit\u00e9.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">L&rsquo;angle souverainet\u00e9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C&rsquo;est l\u00e0 que Haystack s&rsquo;inscrit pleinement dans une d\u00e9marche open source ma\u00eetris\u00e9e. Le framework \u00e9tant agnostique, on peut servir l&rsquo;inf\u00e9rence en local et garder l&rsquo;ensemble de la cha\u00eene sur sa propre infrastructure&nbsp;:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Le <strong>mod\u00e8le de langage<\/strong> servi en local par <a href=\"https:\/\/askem.eu\/en\/2026\/03\/29\/ollama-executer-des-llm-en-local\/\" data-type=\"post\" data-id=\"2141\">Ollama<\/a> ou <a href=\"https:\/\/askem.eu\/en\/2026\/04\/07\/vllm-servir-des-llm-a-haute-performance-en-production\/\" data-type=\"post\" data-id=\"2198\">vLLM<\/a>, donc aucune donn\u00e9e sensible ne quitte l&rsquo;infrastructure.<\/li>\n\n\n\n<li>La <strong>base vectorielle<\/strong> assur\u00e9e par <a href=\"https:\/\/askem.eu\/en\/2026\/04\/01\/qdrant-base-vectorielle-open-source-pour-le-rag-et-la-recherche-semantique\/\" data-type=\"post\" data-id=\"2159\">Qdrant<\/a>, <a href=\"https:\/\/askem.eu\/en\/2026\/04\/11\/pgvector-la-recherche-vectorielle-dans-postgresql-pour-un-rag-sans-brique-supplementaire\/\" data-type=\"post\" data-id=\"2239\">pgvector<\/a> dans PostgreSQL, ou la recherche hybride <a href=\"https:\/\/askem.eu\/en\/2026\/06\/10\/recherche-hybride-avec-opensearch\/\" data-type=\"post\" data-id=\"2371\">d&rsquo;OpenSearch<\/a>.<\/li>\n\n\n\n<li>L&rsquo;<strong>\u00e9valuation<\/strong> branch\u00e9e sur des composants d\u00e9di\u00e9s pour mesurer fid\u00e9lit\u00e9 aux sources et pertinence, dans le m\u00eame pipeline.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Le r\u00e9sultat&nbsp;: une application RAG ou agentique enti\u00e8rement auto-h\u00e9berg\u00e9e, o\u00f9 chaque composant reste interchangeable et o\u00f9 rien d&rsquo;essentiel ne sort de chez soi.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Comment se positionne Haystack<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Face aux autres approches, Haystack occupe une place pr\u00e9cise. L\u00e0 o\u00f9 un orchestrateur par graphe se concentre sur la machine \u00e0 \u00e9tats d&rsquo;un agent, et o\u00f9 les frameworks d&rsquo;agents par r\u00f4les d\u00e9crivent une \u00e9quipe d&rsquo;agents qui collaborent, Haystack part du <strong>pipeline de bout en bout<\/strong>&nbsp;: r\u00e9cup\u00e9rer, router, raisonner, g\u00e9n\u00e9rer, \u00e9valuer, comme une cha\u00eene de production lisible et testable. Il est utilis\u00e9 en production par de grandes organisations, signe de sa maturit\u00e9 plut\u00f4t que d&rsquo;un effet de mode.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Par o\u00f9 commencer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Une mise en route progressive en trois \u00e9tapes&nbsp;:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Un premier pipeline RAG<\/strong>&nbsp;: un r\u00e9cup\u00e9rateur sur une petite base documentaire, un g\u00e9n\u00e9rateur branch\u00e9 sur un mod\u00e8le local, et la r\u00e9ponse sourc\u00e9e qui en sort.<\/li>\n\n\n\n<li><strong>Le passage \u00e0 l&rsquo;agent<\/strong>&nbsp;: ajouter le composant Agent et un ou deux outils pour donner au mod\u00e8le la capacit\u00e9 d&rsquo;agir, tout en gardant le pipeline lisible.<\/li>\n\n\n\n<li><strong>La mise en production<\/strong>&nbsp;: s\u00e9rialiser le pipeline en YAML, le versionner, et ajouter l&rsquo;\u00e9tage d&rsquo;\u00e9valuation pour surveiller la qualit\u00e9 dans le temps.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Points de vigilance<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Quelques r\u00e9flexes \u00e0 garder en t\u00eate&nbsp;: la qualit\u00e9 des r\u00e9ponses d\u00e9pend toujours du mod\u00e8le servi et de la base documentaire, donc les citations restent \u00e0 ouvrir et \u00e0 contr\u00f4ler. La modularit\u00e9 a un co\u00fbt d&rsquo;apprentissage initial, le temps de penser en composants. Enfin, un pipeline agentique avec boucles demande des garde-fous explicites (limites d&rsquo;it\u00e9rations, validation des sorties) pour rester pr\u00e9visible.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ce que nous proposons<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nous accompagnons la conception d&rsquo;un socle Haystack souverain, du premier pipeline RAG jusqu&rsquo;\u00e0 la mise en production \u00e9valu\u00e9e, branch\u00e9 sur une inf\u00e9rence locale et une base vectorielle interne. Vous voulez une cha\u00eene IA ma\u00eetris\u00e9e, lisible et auto-h\u00e9berg\u00e9e plut\u00f4t qu&rsquo;une bo\u00eete noire&nbsp;? \u00c9crivez-nous.<\/p>","protected":false},"excerpt":{"rendered":"<p>Haystack&nbsp;: orchestrer RAG et agents IA en pipelines ma\u00eetris\u00e9s La plupart des frameworks IA tombent dans un de deux pi\u00e8ges&nbsp;: soit ils enferment dans une logique de cha\u00eene rigide, soit ils laissent l&rsquo;agent d\u00e9cider de tout sans contr\u00f4le. Haystack, le framework open source de deepset (licence Apache 2.0), propose une troisi\u00e8me voie&nbsp;: d\u00e9crire son application [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2427,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_front_end_style_editor":"no","ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","osh_disable_topbar_sticky":"default","osh_disable_header_sticky":"default","osh_sticky_header_style":"default","osh_sticky_header_effect":"","osh_custom_sticky_logo":0,"osh_custom_retina_sticky_logo":0,"osh_custom_sticky_logo_height":0,"osh_background_color":"","osh_links_color":"","osh_links_hover_color":"","osh_links_active_color":"","osh_links_bg_color":"","osh_links_hover_bg_color":"","osh_links_active_bg_color":"","osh_menu_social_links_color":"","osh_menu_social_hover_links_color":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[16],"tags":[],"class_list":["post-2426","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ai","entry","has-media"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Haystack : orchestrer RAG et agents IA en pipelines ma\u00eetris\u00e9s - askem<\/title>\n<meta name=\"description\" content=\"ASKEM BUREAU D&#039;\u00c9TUDES ET DE FORMATION NUM\u00c9RIQUE. 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