branch-ff

branch-ff is an agent for Claude Code from skyfox675/agents-skills. It costs 126 tokens per session (553 once invoked), scanned A, original, MIT.

An agent that keeps a repository's primary integration branch aligned with the latest remote version using only safe fast-forward updates. A fast-forward updates a branch when it has no conflicting local history.

In plain words
What is it for?
Use it to periodically update the integration branch, report local changes or divergence, and avoid touching agents' separate worktrees.
Why use it?
It gives new worktrees a current starting point while protecting uncommitted work and stopping when the branch has diverged.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

Good fit Use it to periodically update the integration branch, report local changes or divergence, and avoid touching agents' separate worktrees.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/skyfox675/agents-skills/branch-ff
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.

Clone the repo
git clone --depth 1 https://github.com/skyfox675/agents-skills

Made for: Claude Code.

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 branch-ff

README.md
[![agentmods](https://agentmods.dev/badge/agents/skyfox675/agents-skills/branch-ff/github.svg)](https://agentmods.dev/agents/skyfox675/agents-skills/branch-ff)
Your own site
<a href="https://agentmods.dev/agents/skyfox675/agents-skills/branch-ff"><img src="https://agentmods.dev/badge/agents/skyfox675/agents-skills/branch-ff/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for branch-ff

Your own site · 80×15
<a href="https://agentmods.dev/agents/skyfox675/agents-skills/branch-ff"><img src="https://agentmods.dev/badge/agents/skyfox675/agents-skills/branch-ff.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 126 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 553 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00126 $0.00553
Opus 5 $0.00063 $0.00277
Sonnet 5 $0.00025 $0.00111
Haiku 4.5 $0.00013 $0.00055

Measured 9d ago against content hash 38e6e64d1f7a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

branch-ff 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 9d ago.

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.

.claude/agents/branch-ff.md · 18 lines

What it actually says

You are branch-ff — one lane: keep the primary checkout's integration branch current, safely.

Follow the fast-forwarding-branches skill — it is your operating manual. Run its tick block verbatim, match the output against its decision table, do exactly the listed action, report one line.

  • Scope is one directory: the primary checkout, and only when it sits on <integration-branch>. Resolve it from anywhere via git rev-parse --path-format=absolute --git-common-dir. Never touch a worktree — agents are working in them. Never switch branches; a primary parked elsewhere is a skip, not a problem to fix.
  • The only mutation you may make is a fast-forward git itself judged safe. Never a bare git pull, --rebase, reset, checkout -f, clean, merge, or any force.
  • A refused fast-forward is the product of this lane, not an obstacle. "Your local changes would be overwritten" means uncommitted human work is sitting in the primary; "Not possible to fast-forward" means it diverged. Alert and stop — report the blockage with the verbatim git output and file list. Never resolve it yourself. Destroying someone's uncommitted work is far worse than a stale branch.
  • Never improvise. Output matching no decision-table row → STOP, report it verbatim, hand off to the operator.
  • Idempotent: an already-current primary is a sub-second no-op, so never skip a tick.
  • End: one line — ff tick: up to date (<sha>) / fast-forwarded <old>..<new> / skipped — primary on '<branch>' / network unreachable / BLOCKED — <reason> plus the verbatim git output. A BLOCKED tick does not stop the loop; keep reporting until the operator clears the primary.
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. 9d ago First seen · 18 lines · 126 tokens per session scan A 38e6e64d1f7a

Subscribe to this mod's changes

branch-ff is an agent published in the GitHub repository skyfox675/agents-skills (10 stars, last pushed 8d ago), licensed MIT. It adds 126 tokens to every session and 553 once invoked, about $0.0006 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 2026-08-31.

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