fix: disable take_screenshot tool and remove screenshot references from system prompt for lightpanda engine

README.md

@@ -95,9 +95,9 @@ infer agents add browser-agent http://localhost:8080 \
 
 | Skill | Description | Source |
 |-------|-------------|--------|
-| `webapp-testing` | Use this when the user asks to verify, validate, or test a webapp end-to-end. Performs reconnaissance-then-action: navigate, screenshot the rendered DOM, identify selectors, then exercise the flow using navigate_to_url, click_element, fill_form, wait_for_condition, and take_screenshot. | bare scaffold (`.agents/skills/webapp-testing/SKILL.md`) |
+| `webapp-testing` | Use this when the user asks to verify, validate, or test a webapp end-to-end. Performs reconnaissance-then-action: navigate, screenshot the rendered DOM, identify selectors, then exercise the flow using navigate_to_url, click_element, fill_form, wait_for_condition, and take_screenshot (only available for chromium/firefox/webkit engines; lightpanda has no graphical rendering). | bare scaffold (`.agents/skills/webapp-testing/SKILL.md`) |
 | `web-scraping` | Use this when the user asks to extract structured data from one or more pages. Drives extract_data across paginated URLs, normalizes results, and writes a JSON/CSV artifact via the write tool. | bare scaffold (`.agents/skills/web-scraping/SKILL.md`) |
-| `form-automation` | Use this when the user asks to complete a multi-step form, optionally behind a login. Orchestrates handle_authentication, navigate_to_url, fill_form, click_element, wait_for_condition, and take_screenshot to capture the post-submit confirmation. | bare scaffold (`.agents/skills/form-automation/SKILL.md`) |
+| `form-automation` | Use this when the user asks to complete a multi-step form, optionally behind a login. Orchestrates handle_authentication, navigate_to_url, fill_form, click_element, wait_for_condition, and take_screenshot (only available for chromium/firefox/webkit engines; lightpanda has no graphical rendering) to capture the post-submit confirmation. | bare scaffold (`.agents/skills/form-automation/SKILL.md`) |
 | `deep-research` | Use this when the user asks an open-ended question that needs synthesis from multiple web sources. Plans sub-questions, drives a search engine, visits and cross-references sources via navigate_to_url + extract_data, and writes a cited markdown report with write. | bare scaffold (`.agents/skills/deep-research/SKILL.md`) |
 
 ## Documentation

agent.yaml

@@ -370,7 +370,8 @@ spec:
         end-to-end. Performs reconnaissance-then-action: navigate, screenshot
         the rendered DOM, identify selectors, then exercise the flow using
         navigate_to_url, click_element, fill_form, wait_for_condition, and
-        take_screenshot."
+        take_screenshot (only available for chromium/firefox/webkit engines;
+        lightpanda has no graphical rendering)."
       tags:
         - testing
         - qa
@@ -395,8 +396,9 @@ spec:
       description:
         "Use this when the user asks to complete a multi-step form, optionally
         behind a login. Orchestrates handle_authentication, navigate_to_url,
-        fill_form, click_element, wait_for_condition, and take_screenshot to
-        capture the post-submit confirmation."
+        fill_form, click_element, wait_for_condition, and take_screenshot (only
+        available for chromium/firefox/webkit engines; lightpanda has no
+        graphical rendering) to capture the post-submit confirmation."
       tags:
         - forms
         - automation
@@ -480,6 +482,8 @@ spec:
       **IMPORTANT - Answering capability questions**:
       When the user asks about your skills, tools, capabilities, or what you can do (e.g. "what skills do you have?", "list your tools", "what can you do?"), answer directly from this system prompt and the AVAILABLE SKILLS list below. Do NOT call any tools, do NOT navigate to a URL, and do NOT Read SKILL.md files. Only load a SKILL.md (via the Read tool) once the user has given you a concrete task that matches one of those skills.
 
+      **Note**: When the browser engine is configured as lightpanda (no graphical rendering), the take_screenshot tool is not available. Use extract_data and execute_script for DOM inspection instead.
+
       Your automation solutions should be maintainable, efficient, and production-ready.
     mcp:
       enabled: false