merge-worktree-execute

merge-worktree-execute is a command for coding agents from axiomantic/spellbook. It costs 20 tokens per session (310 once invoked), scanned A, original, MIT.

A command for merging Git worktrees in dependency order, with the full test suite run after each round. A worktree is a separate working directory connected to another branch of the same Git repository.

In plain words
What is it for?
Use it to merge multiple branches, test after each group of merges, and debug failures before proceeding.
Why use it?
It catches broken intermediate states early and sends merge conflicts into a defined resolution process instead of continuing with unverified code.

Command

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/axiomantic/spellbook/merge-worktree-execute
Clone the repo
git clone --depth 1 https://github.com/axiomantic/spellbook

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for merge-worktree-execute

README.md
[![agentmods](https://agentmods.dev/badge/commands/axiomantic/spellbook/merge-worktree-execute.svg)](https://agentmods.dev/commands/axiomantic/spellbook/merge-worktree-execute)
Your own site
<a href="https://agentmods.dev/commands/axiomantic/spellbook/merge-worktree-execute"><img src="https://agentmods.dev/badge/commands/axiomantic/spellbook/merge-worktree-execute.svg" alt="Measured on agentmods" height="20"></a>
Per session 20 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 310 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00020 $0.00310
Opus 5 $0.00010 $0.00155
Sonnet 5 $0.00004 $0.00062
Haiku 4.5 $0.00002 $0.00031

Measured yesterday against content hash 9e604dd54602, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

merge-worktree-execute scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

commands/merge-worktree-execute.md · 40 lines

What it actually says

Phase 2: Sequential Round Merging

Invariant Principles

  1. Dependency order is non-negotiable - Merging out of dependency order produces phantom conflicts and broken intermediate states
  2. Test after every round - Each round must pass the full test suite before the next round begins; never batch merges without verification
  3. Conflicts escalate to resolution phase - Merge conflicts are not resolved inline; they invoke the dedicated conflict resolution workflow

For each round, merge worktrees in dependency order:

# Checkout and update base
cd [main-repo-path]
git checkout [base-branch]
git pull origin [base-branch]

# Merge each worktree in round
WORKTREE_BRANCH=$(cd [worktree-path] && git branch --show-current)
git merge $WORKTREE_BRANCH --no-edit

If merge succeeds: Log success, continue to next worktree.

If conflicts: Proceed to Phase 3 (invoke /merge-worktree-resolve), then continue with remaining worktrees.

Run tests after EACH round:

pytest  # or npm test, cargo test, etc.

If tests fail:

  1. Invoke systematic-debugging skill
  2. Fix issues, commit fixes
  3. Re-run tests until passing
  4. Do NOT proceed to next round until green
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 40 lines · 20 tokens per session scan A 9e604dd54602

Subscribe to this mod's changes

merge-worktree-execute is a command published in the GitHub repository axiomantic/spellbook (10 stars, last pushed yesterday), licensed MIT. It adds 20 tokens to every session and 310 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.