nemesis
Challenge a plan, design, or implementation one branch at a time.
Skill by lithammer
Chalk Labs
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Install
Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.
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About
Use cases: design
Reviews
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Permissions
What this skill can do and what it asks for, from its SKILL.md and code. Checked Nov 2, 2026.
- Tools
- No tools found
- Secrets
- None asked for
- Install scripts
- None found
Network hosts it talks to 1
codeload.github.com· found in install command
Files it touches
~/.claude/skills/nemesis
What's inside
- Skill name
nemesis- Description
- Challenge a plan, design, or implementation one branch at a time.
- License
- MIT
- Instructions
- 61 lines in SKILL.md · view on GitHub
Files (6)
- ECONOMY_BRIEF.md
- FIT_BRIEF.md
- NEMESIS_BRIEF.md
- NEMESIS_REPORT_FORMAT.md
- SKILL.md
- openai.yaml · agents/
SKILL.md (first lines)
# Nemesis Keep the same adversarial reviewer throughout the review loop, across all challenge-and-response turns. Release it when the review ends. ## Pick the brief The target picks the brief: - A plan, design, or idea: [NEMESIS_BRIEF.md](./NEMESIS_BRIEF.md). - An implementation, such as a diff, branch, or PR: two passes, [FIT_BRIEF.md](./FIT_BRIEF.md) then [ECONOMY_BRIEF.md](./ECONOMY_BRIEF.md). Fit goes first: trimming a change that turns out to be the wrong one wastes the pass. Read the target from the request and the conversation; a working-tree diff only supports that reading. An argument of `design` or `implementation` decides it outright, and `fit` or `economy` runs that one pass alone. When the target spans both, ask the user which. Name the brief to the user before the first challenge. ## Start or resume Start a fresh reviewer each time this skill is invoked. Within that run, reuse it, sending only changes and new evidence. Start a replacement if it has already closed. Otherwise, release it before starting a replacement when the user asks for a reset, the brief changes, or the topic changes enough that prior critique would bias the review. Give a fresh reviewer the conversation context and these instructions: - The picked brief: how to challenge and close branches. - [NEMESIS_REPORT_FORMAT.md](./NEMESIS_REPORT_FORMAT.md): response format and status markers. Read this before driving the loop below. If the harness supports only one-shot subagents, carry the prior transcript into each new dispatch. Wait for critique before taking a step that depends on it; gather independent context while the reviewer works. ## Drive the loop 1. Check the reviewer's status marker. If it is missing or invalid, ask the reviewer to restate the response with a valid marker before proceeding. 2. On `[CONTINUE]`, answer the challenge with evidence: defend the choice, or change it and show the result. Read the code when it can settle the point. Send the answer to the same reviewer and repeat. 3. On `[RESOLVED]` or `[STOPPED]`, end the loop and present the reviewer's closing summary, preserving the distinction between accepted risks and unreviewed or unresolved branches. 4. In a two-pass run, a `[RESOLVED]` fit pass starts the economy pass on the code as it now stands. A `[STOPPED]` fit pass ends the run. If the user asks to stop, end the loop and summarize the current state. ## Release reviewers When the review completes, the user stops it, or an error ends the run, preserve the available findings and release every reviewer started by this run before presenting the final summary. Leave unrelated agents alone. Report cleanup failures in the summary.
From lithammer/ai, MIT.
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implement-review
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Review the changes since a fixed point (commit, branch, tag, or merge-base) along two axes: Standards (does the code follow this repo's documented coding…
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ask-matt
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Ask which skill or flow fits your situation.
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implement-spec
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Implement the result of /to-spec and /to-tickets in code.
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implement
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Implement a piece of work based on a spec or set of tickets.
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Signals
- Stars
- 0
- Forks
- 0
- Open issues
- 0
- Last commit (this folder)
- Oct 4, 2026 (1 month ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- Repository
- github.com/lithammer/ai
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
More from lithammer
- 0.565score
code-review
lithammer
Review changed code for correctness bugs and instruction-file violations, verify each candidate, and report the survivors without editing.
SkillAFreshness: AClaude Code +9 - 0.565score
create-pr
lithammer
Create a draft or ready-for-review PR for the current branch.
SkillAFreshness: AClaude Code +9 - 0.565score
develop
lithammer
Implement a feature or fix from agreed requirements, then verify it and resolve an independent spec review.
SkillAFreshness: AClaude Code +9 - 0.561score
simplify
lithammer
Clean up changed code without changing behavior — review it for reuse, simplification, efficiency, and altitude, then apply the fixes.
SkillAFreshness: AClaude Code +9 - 0.558score
review-docs
lithammer
Reviews doc, docstring, and comment diffs for AI-like prose and for comments that no longer have a job.
SkillAFreshness: AClaude Code +9 - 0.558score
refactor
lithammer
Find structural refactors that remove caller obligations, then implement the chosen change.
SkillAFreshness: AClaude Code +9
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Cite this page
nemesis skill. Agent Mart. https://agentmart.dev/skills/lithammer-nemesis (last updated 2026-10-24)