fix(tstest): Fix test timing display issue and update TAP protocol documentation

readme.hints.md

@@ -74,4 +74,34 @@ This fix ensures that test files with the same basename in different directories
 1. Takes the relative path from the current working directory
 2. Replaces path separators (`/`) with double underscores (`__`)
 3. Removes the `.ts` extension
-4. Creates a flat filename that preserves the directory structure
+4. Creates a flat filename that preserves the directory structure
+
+### Test Timing Display (Fixed in v1.9.2)
+
+Fixed an issue where test timing was displayed incorrectly with duplicate values like:
+- Before: `✅ test name # time=133ms (0ms)`
+- After: `✅ test name (133ms)`
+
+The issue was in the TAP parser regex which was greedily capturing the entire line including the TAP timing comment. Changed the regex from `(.*)` to `(.*?)` to make it non-greedy, properly separating the test name from the timing metadata.
+
+## Protocol Limitations and Improvements
+
+### Current TAP Protocol Issues
+The current implementation uses standard TAP format with metadata in comments:
+```
+ok 1 - test name # time=123ms
+```
+
+This has several limitations:
+1. **Delimiter Conflict**: Test descriptions containing `#` can break parsing
+2. **Regex Fragility**: Complex regex patterns that are hard to maintain
+3. **Limited Metadata**: Difficult to add rich error information or custom data
+
+### Planned Protocol V2
+A new internal protocol is being designed that will:
+- Use Unicode delimiters `⟦TSTEST:⟧` that won't conflict with test content
+- Support structured JSON metadata
+- Allow rich error reporting with stack traces and diffs
+- Maintain backwards compatibility during migration
+
+See `readme.protocol.md` for the full specification and `tapbundle.protocols.ts` for the implementation utilities.