# typing-exclusion-worker

Removes Python modules from mypy exclusion lists in pyproject.toml, fixes typing errors, and runs scoped validation. Built for parallel typing debt workers.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 1600 installs · ★ 1089
- Author: getsentry
- License: Apache-2.0 · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/getsentry/skills/tree/HEAD/skills/typing-exclusion-worker/SKILL.md
- Updated: 2026-10-23
- HTML: https://affpapa.org/en/nevibecode/skills/typing-exclusion-worker

## What it does

This skill guides an agent through resolving Python typing debt in strict, isolated batches. The worker removes assigned modules from mypy exclusion overrides in `pyproject.toml`, runs targeted mypy checks, and fixes surfaced type errors. Fixes rely on precise typing patterns like `isinstance` narrowing, accurate return types, and typed class attributes instead of blanket `# type: ignore` comments.

Scope boundaries are enforced strictly. The agent requires a branch name, exact module paths, team domain ownership, and validation commands before touching code. If resolving a type error demands modifying modules owned by another team or creates configuration conflicts in `pyproject.toml`, the worker halts immediately and escalates to the manager instead of expanding changes.

Validation follows a clear progression: targeted mypy first, pytest on affected modules, and `pre-commit run --files`. Once checks pass clean, the agent produces a structured markdown summary documenting removed exclusions, modified files, key type fixes, and remaining blockers.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add getsentry/skills --skill typing-exclusion-worker -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/typing-exclusion-worker/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/typing-exclusion-worker/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add getsentry/skills --skill typing-exclusion-worker -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/typing-exclusion-worker/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add getsentry/skills --skill typing-exclusion-worker -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/typing-exclusion-worker/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install getsentry/skills typing-exclusion-worker
```

2. **Manually: put the files in place**
- File: `.github/skills/typing-exclusion-worker/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add getsentry/skills --skill typing-exclusion-worker -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/getsentry/skills --path skills/typing-exclusion-worker
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/typing-exclusion-worker/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add getsentry/skills --skill typing-exclusion-worker -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/getsentry/skills/tree/HEAD/skills/typing-exclusion-worker/SKILL.md

## When to use it
- remove assigned modules from mypy exclusions in pyproject.toml
- fix Python type errors using type narrowing and precise return annotations
- run scoped pytest and pre-commit checks on touched files
- generate a structured markdown batch report for the orchestrator

## Example prompts
- Remove sentry.api.endpoints.user from mypy exclusions in branch typing/user-endpoints. Fix typing errors and run targeted pytest.
- Remove sentry.models.team from pyproject.toml overrides, fix type issues with isinstance narrowing, and verify with pre-commit.
- Process module sentry.utils.auth: remove its mypy exclusion, run validation commands, and produce the final batch summary.

## Source text · SKILL.md · Apache-2.0

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 8c395465ffa344aa.

BEGIN THIRD-PARTY FILE 8c395465ffa344aa
```text
---
name: typing-exclusion-worker
description: "Python typing exclusion worker: remove assigned mypy exclusion modules in small scoped batches, fix typing issues, run validation, and produce a structured completion summary. Use when running parallel typing-debt workers or when asked to remove modules from pyproject mypy exclusion overrides."
---

# Typing Exclusion Worker

## Purpose

Execute one assigned typing batch safely and predictably:

- remove only assigned modules from mypy exclusions,
- fix surfaced typing issues in scope,
- run required checks,
- return a consistent summary for the manager/orchestrator.

## Inputs Required

Before starting, confirm these inputs exist in the task prompt:

- worktree/branch name,
- exact module list to remove from exclusion,
- ownership/domain boundary,
- expected validation commands (if customized).

If any are missing, ask for them before editing.

## Scope Rules (Hard Constraints)

1. Only remove assigned module entries from the mypy exclusion list in `pyproject.toml`.
2. Keep code changes in assigned scope unless a direct dependency is required to pass typing/tests.
3. Do not expand to cross-team modules unless explicitly approved by the manager.
4. Avoid blanket `# type: ignore`; if unavoidable, use narrow `ignore[code]` with a short reason.

## Execution Workflow

1. **Apply exclusion change**

   - Remove assigned modules from the exclusion override in `pyproject.toml`.

2. **Run mypy on assigned scope**

   - Prefer targeted paths first for fast feedback.
   - Fix errors using explicit typing patterns (`isinstance` narrowing, accurate return types, typed class attrs, relation-safe model access).

3. **Run tests for touched area**

   - Execute targeted pytest for modified modules/tests.
   - Fix regressions before continuing.

4. **Run pre-commit on changed files**

   - Run `pre-commit run --files <changed files>`.
   - If hooks auto-fix files, rerun until clean.

5. **Final verification**
   - Re-run targeted mypy and tests after final edits.
   - Ensure no unrelated files were changed.

## Python Typing Best Practices

- Prefer precise types over `Any`.
- Use type narrowing on unions before attribute access.
- Keep method overrides signature-compatible with base classes.
- Annotate class attributes in tests/helpers when inference is weak.
```
END THIRD-PARTY FILE 8c395465ffa344aa

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