feat!: remove optional length marker option [#N] in favor of [N]

packages/cli/README.md

@@ -62,7 +62,6 @@ cat data.toon | toon --decode
 | `-d, --decode` | Force decode mode (overrides auto-detection) |
 | `--delimiter <char>` | Array delimiter: `,` (comma), `\t` (tab), `\|` (pipe) |
 | `--indent <number>` | Indentation size (default: `2`) |
-| `--length-marker` | Add `#` prefix to array lengths (e.g., `items[#3]`) |
 | `--stats` | Show token count estimates and savings (encode only) |
 | `--no-strict` | Disable strict validation when decoding |
 | `--key-folding <mode>` | Enable key folding: `off`, `safe` (default: `off`) |
@@ -122,7 +121,7 @@ cat large-dataset.json | toon --delimiter "\t" > output.toon
 jq '.results' data.json | toon > filtered.toon
 ```
 
-### Key Folding (spec v1.5)
+### Key Folding (Since v1.5)
 
 Collapse nested wrapper chains to reduce tokens:
 

packages/cli/src/conversion.ts

@@ -13,7 +13,6 @@ export async function encodeToToon(config: {
   output?: string
   indent: NonNullable<EncodeOptions['indent']>
   delimiter: NonNullable<EncodeOptions['delimiter']>
-  lengthMarker: NonNullable<EncodeOptions['lengthMarker']>
   keyFolding?: NonNullable<EncodeOptions['keyFolding']>
   flattenDepth?: number
   printStats: boolean
@@ -31,7 +30,6 @@ export async function encodeToToon(config: {
   const encodeOptions: EncodeOptions = {
     delimiter: config.delimiter,
     indent: config.indent,
-    lengthMarker: config.lengthMarker,
     keyFolding: config.keyFolding,
     flattenDepth: config.flattenDepth,
   }

packages/cli/src/index.ts

@@ -41,11 +41,6 @@ export const mainCommand: CommandDef<{
     description: string
     default: string
   }
-  lengthMarker: {
-    type: 'boolean'
-    description: string
-    default: false
-  }
   strict: {
     type: 'boolean'
     description: string
@@ -107,11 +102,6 @@ export const mainCommand: CommandDef<{
       description: 'Indentation size',
       default: '2',
     },
-    lengthMarker: {
-      type: 'boolean',
-      description: 'Use length marker (#) for arrays',
-      default: false,
-    },
     strict: {
       type: 'boolean',
       description: 'Enable strict mode for decoding',
@@ -187,10 +177,9 @@ export const mainCommand: CommandDef<{
           output: outputPath,
           delimiter: delimiter as Delimiter,
           indent,
-          lengthMarker: args.lengthMarker === true ? '#' : false,
-          printStats: args.stats === true,
           keyFolding: keyFolding as NonNullable<EncodeOptions['keyFolding']>,
           flattenDepth,
+          printStats: args.stats === true,
         })
       }
       else {

packages/cli/test/index.test.ts

@@ -44,7 +44,6 @@ describe('toon CLI', () => {
         const expected = encode(data, {
           delimiter: DEFAULT_DELIMITER,
           indent: 2,
-          lengthMarker: false,
         })
 
         expect(output).toBe(expected)