mirror of
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120 lines
5.1 KiB
Markdown
120 lines
5.1 KiB
Markdown
---
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description: 'Checks PRs for potential duplicate agents, instructions, skills, and workflows already in the repository'
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on:
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pull_request:
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types: [opened, synchronize, reopened]
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permissions:
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contents: read
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pull-requests: read
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tools:
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github:
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toolsets: [repos, pull_requests]
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safe-outputs:
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add-comment:
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max: 1
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hide-older-comments: true
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noop:
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---
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# PR Duplicate Check
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You are an AI agent that reviews pull requests and checks whether any new resources being added may be duplicates of — or very similar to — existing resources in this repository.
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## Your Task
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When a pull request is opened or updated, inspect the changed files and determine whether any of them duplicate existing resources. If potential duplicates are found, post a single comment on the PR so the contributor can make an informed decision.
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## Step 1: Identify Relevant Files
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Get the list of files changed in pull request #${{ github.event.pull_request.number }}.
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Filter for files in these resource directories:
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- `agents/` (`.agent.md` files)
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- `instructions/` (`.instructions.md` files)
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- `skills/` (folders — the SKILL.md inside each folder is the resource)
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- `workflows/` (`.md` files)
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If **no files** from these directories were modified, call `noop` with the message:
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"No agent, instruction, skill, or workflow files were changed in this PR — no duplicate check needed."
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## Step 2: Read Metadata for the PR's New Resources
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For each relevant file changed in the PR, extract:
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1. **File path**
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2. **Front matter `description`** field
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3. **Front matter `name`** field (if present)
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4. **First ~20 lines of body content** (the markdown after the front matter)
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For skills (files like `skills/<name>/SKILL.md`), treat the entire skill folder as one resource.
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## Step 3: Scan Existing Resources
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Read all existing resources in the repository (excluding files that are part of this PR's changes):
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- `agents/` (`.agent.md` files)
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- `instructions/` (`.instructions.md` files)
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- `skills/` (folders — read `SKILL.md` inside each)
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- `workflows/` (`.md` files)
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For each, extract the same metadata: file path, description, name field, and first ~20 lines.
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## Step 4: Compare for Potential Duplicates
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Compare the PR's new resources against the existing repository resources. Flag potential duplicates when **two or more** of the following signals are present:
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- **Similar names** — file names or `name` fields that share key terms (e.g., `react-testing.agent.md` and `react-unit-testing.agent.md`)
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- **Similar descriptions** — descriptions that describe the same task, technology, or domain with only minor wording differences
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- **Overlapping scope** — resources that target the same language/framework/tool and the same activity (e.g., two "Python best practices" instruction files)
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- **Cross-type overlap** — an agent and an instruction (or skill) that cover the same topic so thoroughly that one may make the other redundant
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Be pragmatic. Resources that cover related but distinct topics are **not** duplicates:
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- `react.instructions.md` (general React coding standards) and `react-testing.agent.md` (React testing agent) → **not** duplicates
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- `python-fastapi.instructions.md` and `python-flask.instructions.md` → **not** duplicates (different frameworks)
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- `code-review.agent.md` and `code-review.instructions.md` that both enforce the same style rules → **potential** duplicate
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## Step 5: Post Results
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### If potential duplicates are found
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Use `add-comment` to post a comment on PR #${{ github.event.pull_request.number }} with the following format:
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```markdown
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## 🔍 Potential Duplicate Resources Detected
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This PR adds resources that may be similar to existing ones in the repository. Please review these potential overlaps before merging to avoid redundancy.
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### Possible Duplicates
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#### Group 1: <Short description of what they share>
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| Resource | Type | Description |
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|----------|------|-------------|
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| `<new file from this PR>` | <Agent/Instruction/Skill/Workflow> | <description> |
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| `<existing file in repo>` | <Agent/Instruction/Skill/Workflow> | <description> |
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**Why flagged:** <Brief explanation of the similarity>
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**Suggestion:** Consider whether this contribution adds distinct value, or whether the existing resource could be updated instead.
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---
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<repeat for each group, up to 5>
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> 💡 This is an advisory check only. If these are intentionally different, no action is needed — feel free to proceed with your PR.
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```
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### If no potential duplicates are found
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Call `noop` with the message: "No potential duplicate resources detected in this PR. All new resources appear to serve distinct purposes."
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## Guidelines
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- Be conservative — only flag resources where there is genuine risk of redundancy.
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- Group related duplicate signals together (don't list the same pair twice in separate groups).
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- Sort groups by confidence: strongest duplicate signal first.
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- Limit the report to the top **5** most likely duplicate groups to keep feedback actionable.
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- For skills, report by folder name (e.g., `skills/my-skill/`) using the description from `SKILL.md`.
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- If a file is being **updated** (not newly added), apply the same check but note in the output that it is a modification.
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