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* feat: add web_fetch built-in tool and web-fetch skill - New web_fetch Rust built-in tool (GET-only, auto-approved, structured output: url/title/content/word_count) with HTML to Markdown via Readability - Full SSRF protection: HTTPS-only, no private IPs, DNS rebinding defence, outbound/inbound leak scanning, 5 MB cap, no redirect following - Rate limited: 30 req/min, 500/hr (same as http tool) - Protected tool name; registered in register_builtin_tools() - validate_url made pub(crate) so web_fetch can reuse it from http.rs - New skills/web-fetch/SKILL.md for agent guidance on web browsing - Fixes unicode panic in extract_title: use to_ascii_lowercase not to_lowercase to preserve byte offsets when indexing original string Co-Authored-By: Claude Sonnet 4.6 <[email protected]> * chore: remove web-fetch skill (tool description is self-sufficient) The web_fetch tool's schema description already tells the LLM when and how to use it. A SKILL.md would only add redundant prompt context. Co-Authored-By: Claude Sonnet 4.6 <[email protected]> * fix: include HTTP status in web_fetch output The LLM had no way to distinguish a 404 error page from a 200 success. Including status in the structured output (alongside url/title/content/ word_count) lets the agent report failures correctly and matches the behaviour of the http tool which always returns status. Co-Authored-By: Claude Sonnet 4.6 <[email protected]> * feat(web_fetch): add Chrome UA and safe redirect following - Set a Chrome-like User-Agent so sites that block the default reqwest string return real content instead of bot-rejection pages. - Add Accept: text/markdown, text/html header (mirrors OpenClaw). - Follow up to 3 redirects manually instead of blocking all 3xx. Every Location URL is run through validate_url() before the next request is sent, so SSRF protection applies to every hop identically to how it applies to the original URL. - Resolve relative Location values against the current URL before SSRF-validating them. - Log each followed hop at DEBUG level. Co-Authored-By: Claude Sonnet 4.6 <[email protected]> * fix(web_fetch): expose final_url after redirect following When redirects are followed, the original `url` field no longer reflects where the content actually came from. Add `final_url` so the LLM can cite the canonical source correctly. Equals `url` when no redirects occurred. Co-Authored-By: Claude Sonnet 4.6 <[email protected]> * fix(web_fetch): address review comments and fix CI failures - Store LeakDetector in WebFetchTool struct (init once in new(), not per execute() call) - Use self.leak_detector for both outbound scan and redirect re-validation - Simplify HTML/cfg blocks to reduce duplication (gemini-code-assist suggestion) - Fix pub use ordering in mod.rs (cargo fmt) - Add web_fetch to core_registration_covers_expected_tools snapshot test Co-Authored-By: Claude Sonnet 4.6 <[email protected]> --------- Co-authored-by: Claude Sonnet 4.6 <[email protected]>