sync-upstream

sync-upstream is a skill for Claude Code, Codex from microsoft/vscode. It costs 45 tokens per session (283 once invoked), scanned A, original, MIT.

A skill for rebasing a session branch onto the latest version of its upstream branch. Rebasing reapplies your work on top of newer commits from another branch.

In plain words
What is it for?
Use it to fetch upstream changes, rebase onto the appropriate base branch, resolve conflicts, and verify the result.
Why use it?
It keeps a branch current when the upstream project has changed and provides rules for resolving conflicts.

Skill for Claude CodeCodex ✓ vendor

Written for no agent in particular: nothing here depends on one.

Good fit Use it to fetch upstream changes, rebase onto the appropriate base branch, resolve conflicts, and verify the result.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/microsoft/vscode/sync-upstream
About the project

Visual Studio Code is a code editor that supports editing, navigating, understanding, debugging, and extending software projects. Developers use it for the edit-build-debug cycle, and the catalogue add-ons provide skills, instructions, and agents for working within the editor.

microsoft/vscode · 194,254 stars · on GitHub · code.visualstudio.com

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.

Any agent
npx skills add microsoft/vscode --skill sync-upstream
Clone the repo
git clone --depth 1 https://github.com/microsoft/vscode

Made for: Claude Code, Codex.

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 sync-upstream

README.md
[![agentmods](https://agentmods.dev/badge/skills/microsoft/vscode/sync-upstream/github.svg)](https://agentmods.dev/skills/microsoft/vscode/sync-upstream)
Your own site
<a href="https://agentmods.dev/skills/microsoft/vscode/sync-upstream"><img src="https://agentmods.dev/badge/skills/microsoft/vscode/sync-upstream/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 sync-upstream

Your own site · 80×15
<a href="https://agentmods.dev/skills/microsoft/vscode/sync-upstream"><img src="https://agentmods.dev/badge/skills/microsoft/vscode/sync-upstream.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 283 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. Third-party audits
  • Snyk pass 6 Sept 2026
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high YARA Match · line 3
    YARA rule matched a hack tool or exploit indicator (offensive tools, reconnaissance, privilege escalation, or exploit frameworks).
    Fix: Remove offensive tool references and exploit code. Legitimate agent skills should not contain penetration testing tools, exploit frameworks, or reconnaissance utilities.
How audits are shown
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 $0.00045 $0.00283
Opus 5.5 $0.00018 $0.00113
Sonnet 5.5 $0.00009 $0.00057
Haiku 4.5 $0.00005 $0.00028

Measured 1mo ago against content hash 6dab06ac1625, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

sync-upstream 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 1mo 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.

src/vs/sessions/skills/sync-upstream/SKILL.md · 32 lines

What it actually says

Update Branch

Rebase the current session branch onto the latest upstream so the work stays grounded in origin.

Workflow

  1. If there are uncommitted changes, use the /commit skill to commit them first.
  2. Fetch the latest upstream and rebase onto it:
    git fetch origin
    git rebase origin/main
    
    Use the appropriate base branch if it is not main.

Conflict Resolution

When conflicts arise, upstream always wins:

  • Never alter upstream logic, APIs, or patterns to accommodate session changes.
  • Adapt session work to fit the new upstream — rename, restructure, or rewrite as needed while preserving the session's goals.
  • After resolving each conflict, git add the files and git rebase --continue.

Validation

After the rebase completes, verify the result still compiles and meets the session's objectives. If session changes no longer make sense against the updated upstream, explain what changed and propose a revised approach.

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. 1mo ago First seen · 32 lines · 45 tokens per session scan A 6dab06ac1625

Subscribe to this mod's changes

sync-upstream is a skill published in the GitHub repository microsoft/vscode (194,254 stars, last pushed today), licensed MIT. It adds 45 tokens to every session and 283 once invoked, about $0.0002 per session on Opus 5.5. 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.

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