docs: log iteration 13, update verification progress to 68.1%

Author: kvz

CHANGELOG.md

@@ -30,11 +30,12 @@ Ideas that will be planned and find their way into a release at one point
 - [ ] website: Fix the search functionality
 - [ ] Verification: verify examples against native runtimes (PHP/Go/Python/Ruby/C) with Docker
       - [x] `yarn verify` and `yarn verify:php` scripts added
-      - [x] Docker-based PHP verification working (56/91 string functions pass, 61.5%)
+      - [x] Docker-based PHP verification working (62/91 string functions pass, 68.1%)
       - [x] Parallel execution with p-map (8x concurrency)
       - [x] Cache invalidation when verify.ts changes
       - [x] Strip PHP warnings from output, fix object literal translation, string-aware property access
-      - [ ] Remaining 35 failures: Unicode handling, pass-by-ref patterns, implementation differences
+      - [x] JSON forward slash normalization, skip language constructs (echo)
+      - [ ] Remaining 29 failures: Unicode handling, pass-by-ref patterns, implementation differences
       - [ ] CI integration: fail if verification diverges
       - [ ] Badge: "Verified against PHP 8.3"
 - [ ] Modernize, e.g.:

docs/prompts/LOG.md

@@ -52,3 +52,14 @@ LLMs log key learnings, progress, and next steps in one `### Iteration ${increme
 - Root cause: node_modules had incorrect indent-string 5.0.0 (should be 2.1.0) - reinstall fixed
 - All 925 tests pass on Node v25.2.1
 - PR #477 (composer.json) was merged - now part of main
+
+### Iteration 13
+
+2026-01-07
+
+- Improved PHP string verification: 56/91 → 62/91 (68.1%) (PR #495, merged)
+  - Fixed chr.js: separated malformed examples, documented Unicode extension
+  - Fixed nl2br.js: use double quotes so PHP interprets `\n`
+  - Fixed ord.js: removed Unicode-specific example (not in PHP)
+  - Added `echo` to skip list (PHP language construct, not a function)
+  - Added JSON forward slash normalization (`\/` → `/`) to verify.ts