How do I install the Mom Rebuild skill?

Run npx skillmds@latest add momhq/mom-rebuild in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Mom Rebuild safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Mom Rebuild?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Mom Rebuild free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Mom Rebuild?

momhq (@momhq) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Mom Rebuild by momhq — Agent Skill

Name: Mom Rebuild
Author: momhq

Mom Rebuild

Rebuild this project's MOM vault from scratch over the full captured history. Use after switching synthesis engines, recovering from a corrupted vault, or when the user explicitly asks to rebuild or regenerate memory from the beginning.

momhq Updated Sep 17, 2026

File contents

Rebuild discards the synthesized vault and re-creates it from offset 0 over the entire captured history. It is heavier than a fold — use it deliberately. For routine end-of-session saves, use /mom-fold instead.

Preflight

Check that mom is on PATH:

command -v mom

If it is missing, tell the user MOM is not installed and ask permission to install it:

MOM is not installed. Install it now with Homebrew?
  brew install momhq/tap/mom
Source: https://github.com/momhq/mom

If the user agrees, run that command. If the user declines, stop. Do not install MOM without explicit permission.

Confirm a project is bound:

test -f .mom-project.yaml

If it is missing, the directory is unbound — there is nothing to rebuild. Tell the user to bind first with /mom-project, then stop.

Run

Confirm with the user before rebuilding — it regenerates the whole vault from scratch (human-authored content in CLAUDE.md is preserved; synthesized vault files are replaced) and runs the LLM engine over all history, so it can be slow.

On confirmation:

mom vault rebuild

Append --engine <auto|claude|codex|pi> only if the user named a specific engine. When it finishes, run mom vault status and report the watermark, file count, and engine used.

Rules

Always confirm before rebuilding — it is a full regeneration over all captured history.
For routine saves use /mom-fold; reserve rebuild for engine changes or recovery from a corrupted vault.
CLI flag surface — never invent flags. Before using any flag, run mom vault rebuild --help and confirm it appears.

Postflight (version hint)

Any mom ... command may print a banner to stderr like:

MOM 0.40.1 available. Run `brew upgrade mom` or `mom self-update`

If you see that line, finish the task first, then add one short line at the end of your reply suggesting the upgrade. Do not run the upgrade yourself.

---name: mom-rebuilddescription: Rebuild this project's MOM vault from scratch over the full captured history. Use after switching synthesis engines, recovering from a corrupted vault, or when the user explicitly asks to rebuild or regenerate memory from the beginning.---Rebuild discards the synthesized vault and re-creates it from offset 0 over the entire captured history. It is heavier than a fold — use it deliberately. For routine end-of-session saves, use `/mom-fold` instead.## PreflightCheck that `mom` is on PATH:```bashcommand -v mom```If it is missing, tell the user MOM is not installed and ask permission to install it:```textMOM is not installed. Install it now with Homebrew? brew install momhq/tap/momSource: https://github.com/momhq/mom```If the user agrees, run that command. If the user declines, stop. Do not install MOM without explicit permission.Confirm a project is bound:```bashtest -f .mom-project.yaml```If it is missing, the directory is unbound — there is nothing to rebuild. Tell the user to bind first with `/mom-project`, then stop.## RunConfirm with the user before rebuilding — it regenerates the whole vault from scratch (human-authored content in CLAUDE.md is preserved; synthesized vault files are replaced) and runs the LLM engine over all history, so it can be slow.On confirmation:```bashmom vault rebuild```Append `--engine <auto|claude|codex|pi>` only if the user named a specific engine. When it finishes, run `mom vault status` and report the watermark, file count, and engine used.## Rules- Always confirm before rebuilding — it is a full regeneration over all captured history.- For routine saves use `/mom-fold`; reserve rebuild for engine changes or recovery from a corrupted vault.- **CLI flag surface — never invent flags.** Before using any flag, run `mom vault rebuild --help` and confirm it appears.## Postflight (version hint)Any `mom ...` command may print a banner to stderr like:```MOM 0.40.1 available. Run `brew upgrade mom` or `mom self-update````If you see that line, finish the task first, then add one short line at the end of your reply suggesting the upgrade. Do not run the upgrade yourself.

Frequently asked questions