feat: Add [regex] section to bytecode dump

crates/plotnik-bytecode/src/bytecode/dump.rs

@@ -23,6 +23,7 @@ pub fn dump(module: &Module, colors: Colors) -> String {
     let ctx = DumpContext::new(module, colors);
 
     dump_strings(&mut out, module, &ctx);
+    dump_regexes(&mut out, module, &ctx);
     dump_types_defs(&mut out, module, &ctx);
     dump_types_members(&mut out, module, &ctx);
     dump_types_names(&mut out, module, &ctx);
@@ -143,6 +144,27 @@ fn dump_strings(out: &mut String, module: &Module, ctx: &DumpContext) {
     out.push('\n');
 }
 
+fn dump_regexes(out: &mut String, module: &Module, ctx: &DumpContext) {
+    let count = module.header().regex_table_count as usize;
+    // Index 0 is reserved, so only print if there are actual regexes
+    if count <= 1 {
+        return;
+    }
+
+    let c = &ctx.colors;
+    let regexes = module.regexes();
+    let w = width_for_count(count);
+
+    writeln!(out, "{}[regex]{}", c.blue, c.reset).unwrap();
+    // Skip index 0 (reserved)
+    for i in 1..count {
+        let string_id = regexes.get_string_id(i);
+        let pattern = &ctx.all_strings[string_id.get() as usize];
+        writeln!(out, "R{i:0w$} {}/{pattern}/{}", c.green, c.reset).unwrap();
+    }
+    out.push('\n');
+}
+
 fn dump_types_defs(out: &mut String, module: &Module, ctx: &DumpContext) {
     let c = &ctx.colors;
     let types = module.types();

docs/binary-format/07-dump-format.md

@@ -81,6 +81,22 @@ Value:
 - **`Value`**: The compiled query definition. Step 08 branches to try `Num` (step 11) or `Str` (step 16).
 - **`...`**: Padding slots (multi-step instructions occupy consecutive step IDs).
 
+### Regex Section
+
+When the query contains regex predicates (`=~` or `!~`), a `[regex]` section appears after `[strings]`:
+
+```
+[regex]
+R1 /pattern/
+R2 /another.*/
+```
+
+Format: `R<id> /<pattern>/`
+
+- Index 0 is reserved, so regex IDs start at 1
+- Patterns are displayed from the string table for readability
+- In transitions, predicates reference patterns inline: `(identifier) =~ /foo/`
+
 ## Files
 
 - `crates/plotnik-lib/src/bytecode/dump.rs` — Dump formatting logic
@@ -184,6 +200,7 @@ Effects in `[pre]` execute before match attempt; effects in `[post]` execute aft
 | Prefix | Section      | Description |
 | ------ | ------------ | ----------- |
 | S##    | strings      | StringId    |
+| R##    | regex        | RegexId     |
 | T##    | type_defs    | TypeId      |
 | M##    | type_members | MemberIndex |
 | N##    | type_names   | NameIndex   |