dual-copy-skill-publish

Load rule: Formal SoT. Prefer one canonical library + symlink for portable skills. This skill applies only when policy requires two git-tracked trees (project-born skill).

// Signature
ProjectSkill  ≔ <project>/.agents/skills/<name>/   // or .cursor/skills/
LibrarySkill  ≔ {SKILLS_ROOT}/<name>/              // e.g. ~/Work/personal/skills
SoT           ≔ single write source per edit pass; then sync
Kind ∈ { project_born, portable_library }

// Axioms
A1  Scope = project_born only  — portable skills → symlink ([master-planner](../master-planner/SKILL.md)); never dual-edit portable bodies
A2  After publish: ProjectSkill ≡ LibrarySkill  (byte-identical tree)  ∨  ProjectSkill → symlink(LibrarySkill) when vendoring allowed
A3  Indexes updated both sides when name/description changes (README, AGENTS.md)
A4  No secrets / absolute home paths in bodies — use ~ or {REPO_ROOT}
A5  Push only with explicit user approval (shared remotes)
A6  Evaluate(δ) ≔ (Correctness, Effectiveness, Efficiency)

Related: skill-rename-propagation · master-planner · author-workflow-skill · session-unit-order (example project-born skill).

Use / skip

Procedure

1 Orient → 2 Classify kind → 3 Choose SoT → 4 Write → 5 Sync → 6 Indexes → 7 Validate → 8 Commit (push=HITL)

1. Orient

echo "PROJECT=$(pwd)"
echo "SKILLS_ROOT=${SKILLS_ROOT:-$HOME/Work/personal/skills}"
ls .agents/skills 2>/dev/null; ls .cursor/skills 2>/dev/null
test -d "${SKILLS_ROOT:-$HOME/Work/personal/skills}/.git"

2. Classify

3. SoT for this pass

• Default: edit project first when project-born, then strip project-only overlays before library copy
• Or: edit library first when generalizing an already-portable extract
• Never edit both independently in the same pass

4. Write under SoT

• SKILL.md: third-person description + triggers
• optional references/, scripts/, templates/
• meet QUALITY.md

5. Sync other tree

NAME=<skill-name>
SRC=…   # SoT
DST=…   # other
# dual-copy (two git trees):
rsync -a --delete --exclude .git "$SRC/" "$DST/"
# OR when project may vendor via symlink (portable after promotion):
ln -sfn "$SKILLS_ROOT/$NAME" .agents/skills/$NAME

rsync without --delete leaves stale DST files — always --delete when dual-copying.

6. Indexes

• Library README.md catalog row if new
• Project AGENTS.md active-skills table
• master-planner packs only if pack-listed

7. Validate

node "$SKILLS_ROOT/$NAME/scripts/validate-skill.mjs" 2>/dev/null || true
# dual-copy (not symlink):
diff -qr "$SRC" "$DST"
# optional hash:
# find "$SRC" -type f -exec sha256sum {} \; | sort | sha256sum

8. Commit (each repo separately)

cd "$SKILLS_ROOT" && git add "$NAME" README.md && git status
# commit with conventional message — push only if user requested
cd "$PROJECT" && git add .agents/skills/$NAME AGENTS.md && git status

Done when

• Kind was project_born (or intentional dual-track documented)
• Trees identical or project uses symlink to library
• Catalogs updated
• Validator (if any) passes; diff -qr clean when dual-copy
• Commits created; push only if user requested

Anti-patterns

Done_when cmds: diff -qr "$SRC" "$DST" · test -f "$SKILLS_ROOT/$NAME/SKILL.md" · rg -n '^name:' "$NAME/SKILL.md".