Skip to content

Search skills.../

Agent Skill Search Engine

Search

Search
Categories
Occupations

About

About
Privacy
Terms

© 2026 Skills Pool. All rights reserved.

Skill File

Pr Base Branch Merge Base

Resolve PRBaseBranch for PR context collection using merge-base ancestry. Use when orchestrators or review workflows need the correct comparison base branch.

drmoisan0 starsMar 21, 2026

Categories

Knowledge Base

Skill Content

Deterministic branch-selection rules for PR context collection.

When to Use This Skill

Use this skill when:

Running PR context collection via drmCopilotExtension.collectPrContext,
Delegating post-implementation review that depends on PRBaseBranch,
Constructing PR context artifacts where the base must not be hard-coded.

Selection Contract

PRBaseBranch MUST be resolved from git ancestry, not guessed.

Definition of correct base:

choose the candidate branch whose merge-base with HEAD has the most recent commit timestamp,
this implements "find the branch with the most recent commit in common."

Deterministic Procedure

Run the following via Bash:

Enumerate candidate branches from local and remotes, excluding HEAD and detached refs.
For each candidate , compute merge-base commit .

Related Skills

Quick Install

Pr Base Branch Merge Base

npx skillvault add drmoisan/drmoisan-taskmaster-claude-skills-pr-base-branch-merge-base-skill-md

Download Skill Open repository

Author: drmoisan
stars: 0
Updated: Mar 21, 2026

On this page

01When to Use This Skill 02Selection Contract

B

M = git merge-base HEAD B

Compute merge_base_epoch(B) from git show -s --format=%ct M.

Select branch with maximum merge_base_epoch(B).

Tie-breakers (in order):

development
main
master
lexical ascending branch name

Guardrails

Do not default to main unless merge-base resolution fails for all candidates.
If all candidates fail, surface explicit error context and use repository default branch only as last-resort fallback.
Persist chosen PRBaseBranch in orchestration state and reuse it within the same run.

Collector Invocation Rule

When invoking PR context collection, pass the resolved base explicitly:

drmCopilotExtension.collectPrContext --base <resolved-PRBaseBranch>

Evidence Recommendation

For auditability, include in logs/checkpoint:

selected branch name,
selected merge-base SHA,
selected merge-base timestamp,
top competing candidates with timestamps when available.

03Deterministic Procedure

05Collector Invocation Rule

06Evidence Recommendation

CMS & Platforms

Notion

Notion API for creating and managing pages, databases, and blocks.

Feishu Wiki

Feishu knowledge base navigation. Activate when user mentions knowledge base, wiki, or wiki links.

Gemini

Gemini CLI for one-shot Q&A, summaries, and generation.

Obsidian Vault Maintainer

Maintain an Obsidian-friendly memory wiki vault with wikilinks, frontmatter, and official Obsidian CLI awareness.

Openclaw Pr Maintainer

Maintainer workflow for reviewing, triaging, preparing, closing, or landing OpenClaw pull requests and related issues. Use when Codex needs to validate bug-fix claims, search for related issues or PRs, apply or recommend close/reason labels, prepare GitHub comments safely, check review-thread follow-up, or perform maintainer-style PR decision making before merge or closure.

Wiki Maintainer

Maintain the OpenClaw memory wiki vault with deterministic pages, managed blocks, and source-backed updates.

Pr Base Branch Merge Base | Skills Pool