skills: update skills

skills/translation/references/bilingual-format.md

@@ -0,0 +1,36 @@
+# Bilingual DJ Format
+
+## Layout
+
+Each pair: source line immediately followed by target line. Blank line separates pairs.
+
+```
+source-line
+target-line
+
+source-line
+target-line
+```
+
+NOT:
+```
+source-line
+              ← WRONG: extra blank between source and target
+target-line
+```
+
+## Creating initial bilingual from source only
+
+Every source line gets an empty target placeholder + blank separator:
+
+```
+source-A
+
+source-B
+```
+
+(2 blank lines between consecutive source lines: empty target + separator.)
+
+## Verification
+
+Source line count × 3 − 1 = bilingual line count (before trailing newline strip).

skills/translation/references/markdown-to-djot.md

@@ -11,6 +11,23 @@ sed -n '1,218p' combined.md > a1.md
 sed -n '220,282p' combined.md > a2.md
 ```
 
+## TOC stripping
+
+Pandoc docx→md produces a markdown TOC with tab-separated page numbers:
+
+```markdown
+[一、对佛教的感悟\t1](#一、对佛教的感悟)
+[二、佛教与人类文明\t5](#二、佛教与人类文明)
+```
+
+Strip before conversion:
+
+```bash
+sed -i '/^\[.*\t.*\](#.*)$/d' input.md
+```
+
+Or in Python: skip lines matching `line.startswith("[") and "\t" in line and "](#" in line`.
+
 ## Heading anchor cleanup
 
 Pandoc's docx→md conversion adds `{#heading-id}` anchors to every heading: