- 📁 references/
- 📄 SKILL.md
kfl
KFL2 (Kubeshark Filter Language) reference. This skill MUST be loaded before writing, constructing, or suggesting any KFL filter expression. KFL is statically typed — incorrect field names or syntax will fail silently or error. Do not guess at KFL syntax without this skill loaded. Trigger on any mention of KFL, CEL filters, traffic filtering, display filters, query syntax, filter expressions, write a filter, construct a query, build a KFL, create a filter expression, "how do I filter", "show me only", "find traffic where", protocol-specific queries (HTTP status codes, DNS lookups, Redis commands, Kafka topics), Kubernetes-aware filtering (by namespace, pod, service, label, annotation), L4 connection/flow filters, time-based queries, or any request to slice/search/narrow network traffic in Kubeshark. Also trigger when other skills need to construct filters — KFL is the query language for all Kubeshark traffic analysis. --- # KFL2 — Kubeshark Filter Language You are a KFL2 expert. KFL2 is built on Google's CEL (Common Expression Language) and is the query language for all Kubeshark traffic analysis. It operates as a **display filter** — it doesn't affect what's captured, only what you see. Think of KFL the way you think of SQL for databases or Google search syntax for the web. Kubeshark captures and indexes all cluster traffic; KFL is how you search it. For the complete variable and field reference, see `references/kfl2-reference.md`. ## Core Syntax KFL expressions are boolean CEL expressions. An empty filter matches everything. ### Operators | Category | Operators | |----------|-----------| | Comparison | `==`, `!=`, `<`, `<=`, `>`, `>=` | | Logical | `&&`, `\|\|`, `!` | | Arithmetic | `+`, `-`, `*`, `/`, `%` | | Membership | `in` | | Ternary | `condition ? true_val : false_val` | ### String Functions ``` str.contains(substring) // Substring search str.startsWith(prefix) // Prefix match str.endsWith(suffix) // Suffix match str.matches(regex)