refactor(writer): Remove leetcode_template config and usage

- Remove leetcode configuration from config.yaml
- Remove leetcode_template initialization and usage from writer.py
- Update prompt to use direct LeetCode URL format (LLM knows correct format)
- Keep github_template for proper template substitution
- Prevent misleading template configuration for LeetCode links

Author: lufftw

tools/ai-markmap-agent/config/config.yaml

@@ -29,10 +29,6 @@ urls:
   github:
     base: "https://github.com/lufftw/neetcode"
     solution_template: "https://github.com/lufftw/neetcode/blob/main/{solution_file}"
-  
-  leetcode:
-    base: "https://leetcode.com"
-    problem_template: "https://leetcode.com/problems/{slug}/"
 
 # -----------------------------------------------------------------------------
 # Data Sources Configuration

tools/ai-markmap-agent/prompts/writer/writer_behavior.md

@@ -45,8 +45,22 @@ Use this data to verify problem information and generate correct links:
 {problem_data}
 
 ### URL Templates
-- For problems WITH solution_file: `{github_template}`
-- For problems WITHOUT solution_file: `{leetcode_template}`
+
+**CRITICAL: Link Generation Rules**
+
+1. **If problem has `solution_file` (Has Solution = "Yes"):**
+   - Use GitHub project link: `{github_template}`
+   - Replace `{solution_file}` with the actual solution file path from problem metadata
+   - Example: `https://github.com/lufftw/neetcode/blob/main/solutions/0905_sort_array_by_parity.py`
+   - This takes priority over LeetCode links
+
+2. **If problem has NO `solution_file` (Has Solution = "No"):**
+   - Use LeetCode problem link with CORRECT format
+   - Format: `https://leetcode.com/problems/{slug}/description/`
+   - The `slug` is provided in the problem metadata table
+   - **IMPORTANT**: Use the slug as-is from metadata (e.g., `container-with-most-water`), NOT the problem ID format (e.g., NOT `0011_container_with_most_water`)
+   - You know the correct LeetCode URL format - use it correctly
+   - Example: `https://leetcode.com/problems/container-with-most-water/description/`
 
 ### Ontology Reference
 {ontology_summary}
@@ -84,10 +98,23 @@ Use this data to verify problem information and generate correct links:
 - Match emoji usage with baseline (if any)
 
 ### Link Format
-- LeetCode problems: Use full "LeetCode" not "LC"
-- Solution links: Use GitHub template when solution exists
-- Problem links: Use LeetCode template when no solution
-- Format: `[Problem Title](url)` 
+
+**Priority Order:**
+1. **If solution exists (Has Solution = "Yes"):** Use GitHub project link
+   - Format: `[Problem Title](https://github.com/lufftw/neetcode/blob/main/solutions/XXXX_problem_name.py)`
+   - Example: `[LeetCode 905 - Sort Array By Parity](https://github.com/lufftw/neetcode/blob/main/solutions/0905_sort_array_by_parity.py)`
+
+2. **If no solution (Has Solution = "No"):** Use LeetCode problem link
+   - Format: `[Problem Title](https://leetcode.com/problems/{slug}/description/)`
+   - Use the `slug` from problem metadata (e.g., `container-with-most-water`)
+   - **DO NOT** use problem ID format like `0011_container_with_most_water`
+   - **DO** use the correct slug format: `container-with-most-water`
+   - Example: `[LeetCode 11 - Container With Most Water](https://leetcode.com/problems/container-with-most-water/description/)`
+
+**General Rules:**
+- Always use full "LeetCode" not "LC" in link text
+- Format: `[Problem Title](url)`
+- Verify all links are correct before outputting 
 
 ### Markmap Features
 - Use `<!-- markmap: fold -->` for collapsible sections

tools/ai-markmap-agent/src/agents/writer.py

@@ -55,10 +55,6 @@ def __init__(self, config: dict[str, Any] | None = None):
             "solution_template",
             "https://github.com/lufftw/neetcode/blob/main/{solution_file}"
         )
-        self.leetcode_template = urls_config.get("leetcode", {}).get(
-            "problem_template",
-            "https://leetcode.com/problems/{slug}/"
-        )
 
     def _load_format_guide(self, model_config: dict) -> str:
         """Load the Markmap format guide."""
@@ -170,7 +166,6 @@ def process(self, state: dict[str, Any]) -> dict[str, Any]:
             improvement_details=detailed_descriptions,
             problem_data=self._format_problems_for_prompt(problems_lookup),
             github_template=self.github_template,
-            leetcode_template=self.leetcode_template,
             ontology_summary=self._format_ontology(ontology),
         )