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git-worktree-runner: Instructions file for GitHub Copilot

.github/instructions/lib.instructions.md

git-worktree-runner lib.instructions.md is an instructions file for GitHub Copilot from coderabbitai/git-worktree-runner. It costs 652 tokens per session, scanned A, original, Apache-2.0.

Project instructions for the shell library of a Git worktree runner. A Git worktree is a separate working directory connected to the same repository, useful for handling branches side by side.

In plain words
What is it for?
Use them when modifying library shell files, configuration lookup, worktree creation, directory scanning, or Git-version compatibility.
Why use it?
They help agents change shared shell code without breaking configuration precedence, path handling, command compatibility, or existing command interfaces.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is coderabbitai/git-worktree-runner's own configuration. It tells GitHub Copilot how to work on git-worktree-runner itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything git-worktree-runner configures →

not rated 1.8krepo +6 changed yesterday A scan 652 tokens original Apache-2.0
View source ↗ coderabbitai/git-worktree-runner
About the project

gtr is a command-line tool that manages Git worktrees, which let developers keep multiple branches checked out in separate directories at the same time. It automates worktree creation, branch setup, configuration copying, dependency installation, and workspace preparation for reviews, coding agents, and parallel development. The catalogue contains instructions for using gtr.

coderabbitai/git-worktree-runner · 1,808 stars · on GitHub

Reuse

Borrowing it

Nothing to install: this file belongs to coderabbitai/git-worktree-runner. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/coderabbitai/git-worktree-runner/main/.github/instructions/lib.instructions.md
Clone the repo
git clone --depth 1 https://github.com/coderabbitai/git-worktree-runner

Made for: GitHub Copilot.

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README.md
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Per session 652 This file is loaded in full into every session.
When invoked 652 The same file — it is already loaded in full.
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 $0.00652 $0.00652
Opus 5.5 $0.00261 $0.00261
Sonnet 5.5 $0.00130 $0.00130
Haiku 4.5 $0.00065 $0.00065

Measured yesterday against content hash f9d06e792def, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

git-worktree-runner lib.instructions.md 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.

.github/instructions/lib.instructions.md · 32 lines

How it starts

The opening of the file, as written. The whole thing — 32 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Lib Instructions

Modifying Core (lib/*.sh)

  • Maintain backwards compatibility with existing configs
  • Quote all paths: Support spaces in directory names
  • Use log_error / log_info from lib/ui.sh for user messages
  • Git version fallbacks: See get_current_branch() in lib/core.sh (Git 2.22+ branch --show-current, falling back to rev-parse --abbrev-ref HEAD)
  • Regenerate completions after touching _EDITOR_REGISTRY, _AI_REGISTRY, or _CFG_KEY_MAP: ./scripts/generate-completions.sh (CI runs --check)

Key Functions & Responsibilities

  • resolve_base_dir: config/env/default selection; warn if inside repo & not ignored.
  • resolve_target: ID 1, then exact registered branch, then literal registered folder alias; returns TSV.
  • create_worktree: decides remote/local/new; respects --force + --name safety.
  • cfg_default: precedence local git config → .gtrconfig → global/system git config → GTR_* env var → fallback (do not reorder). cfg_default_trusted_file uses the same order but ignores .gtrconfig values until git gtr trust approves them.
  • sanitize_branch_name: branch name → folder name; the only place that logic lives.
  • lib/hooks.sh dispatchers: run_hooks evaluates each hook in its own subshell and serves postRemove directly; run_hooks_in is the same after a cd into the target worktree (postCreate, preRemove); run_hooks_export evaluates postCd hooks directly rather than in a nested subshell, so their exports reach the tool launched beside them; lib/launch.sh and lib/commands/ai.sh each call it inside a ( cd "$worktree" ... ) block that also launches the AI tool, which is what keeps those exports out of the main script. The editor paths (_auto_launch_editor, _open_editor, cmd_editor) run no postCd hooks at all. The gtr cd functions generated by init evaluate postCd hooks themselves. Every path skips untrusted .gtrconfig hooks.
  • cfg_get_all: merge multi-value keys; preserves order; deduplicates.

Read the full file on GitHub · 32 lines

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 Changed · +3 tokens per session f9d06e792def
  2. 1mo ago Changed · +3 lines · +307 tokens per session 42720818cf9b
  3. 2mo ago First seen · 29 lines · 342 tokens per session scan A c083bf7b2eaf

Subscribe to this mod's changes

git-worktree-runner lib.instructions.md is an instructions file published in the GitHub repository coderabbitai/git-worktree-runner (1,808 stars, last pushed yesterday), licensed Apache-2.0. It adds 652 tokens to every session, about $0.0026 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 2026-08-30.

Git and workflowgit-worktree
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