feat: add everything-claude-code-conventions ECC bundle (.claude/commands/add-new-skill.md)

.claude/commands/add-new-skill.md

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+---
+name: add-new-skill
+description: Workflow command scaffold for add-new-skill in everything-claude-code.
+allowed_tools: ["Bash", "Read", "Write", "Grep", "Glob"]
+---
+
+# /add-new-skill
+
+Use this workflow when working on **add-new-skill** in `everything-claude-code`.
+
+## Goal
+
+Adds a new skill to the repository, enabling new agent capabilities or workflows.
+
+## Common Files
+
+- `skills/*/SKILL.md`
+- `.agents/skills/*/SKILL.md`
+- `.claude/skills/*/SKILL.md`
+
+## Suggested Sequence
+
+1. Understand the current state and failure mode before editing.
+2. Make the smallest coherent change that satisfies the workflow goal.
+3. Run the most relevant verification for touched files.
+4. Summarize what changed and what still needs review.
+
+## Typical Commit Signals
+
+- Create a new SKILL.md file under skills/ or .agents/skills/ or .claude/skills/
+- Optionally update documentation (AGENTS.md, README.md, WORKING-CONTEXT.md)
+- Optionally add supporting files (e.g., manifests/install-modules.json)
+
+## Notes
+
+- Treat this as a scaffold, not a hard-coded script.
+- Update the command if the workflow evolves materially.