Official agent skill

Math Proof Solo

by anthropics in anthropics/claude-plugins-official

Solves one hard mathematics problem in a single session without subagents, keeping settled steps in a notes file and ending with a self-contained proof.md.

OfficialApache-2.0Auto-check passedResearch & Science

Install Math Proof Solo

skills CLI
$ npx skills add anthropics/claude-plugins-official --skill solo -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install anthropics/claude-plugins-official solo --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/anthropics/claude-plugins-official.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/math-proof/skills/solo .claude/skills/solo && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
solo
GitHub stars
38k
Token cost
~1.5k tokens
SKILL.md length
942 words
Files
1
Skills in repo
29
Repo updated
First seen
Licence
Apache-2.0

At a glance

Solves one hard mathematics problem in a single session without subagents, keeping settled steps in a notes file and ending with a self-contained proof.md.

  • Working through a hard proof with one agent doing all the reasoning
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Keeping a written trail of settled steps so a cut-off response loses nothing
  • Producing a self-contained proof document for a stated problem

What it does

You give the skill a problem as text or as the path to a file, optionally with a DIR=path prefix to choose the run directory, which otherwise defaults to ./math-proof-solo. The agent keeps the problem in problem.md, reasons in stages, and records each settled step in notes.md so nothing is lost if a response is cut off.

The deliverable is proof.md, written to stand on its own. If notes.md already exists in the directory, the agent first compares problem.md with the problem it was given. Settings such as rounds and waves belong to a separate /math-proof:siege command, and the allowed tools are file reading and writing plus mkdir, cp and cmp.

When your agent uses it

  • Working through a hard proof with one agent doing all the reasoning
  • Keeping a written trail of settled steps so a cut-off response loses nothing
  • Producing a self-contained proof document for a stated problem

Example prompts

  • “/math-proof:solo Show that every integer greater than 1 has a prime divisor.”
  • “/math-proof:solo ./problems/inequality.md”
  • “/math-proof:solo DIR=./runs/amgm Prove that for positive reals a and b, the average of a and b is at least the square root of ab.”

Requirements

  • A writable directory for problem.md, notes.md and proof.md
  • Pre-approved tools (allowed-tools): Read, Write, Edit, Glob, Grep, Bash(mkdir *), Bash(cp *), Bash(cmp *)

What it can do on your machine

Read from SKILL.md and the folder at commit 315c4e4. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Write
    • Edit
    • Glob
    • Grep
    • Bash(mkdir *)
    • Bash(cp *)
    • Bash(cmp *)

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Math Proof Solo loads about 1.5k tokens when it runs. Until then it costs about 83 tokens; SKILL.md has 942 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~83
When it runs · the whole SKILL.md, loaded when a task matches
~1.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from anthropics/claude-plugins-official at commit 315c4e4, republished under its Apache-2.0 licence (© anthropics). 942 words, ~1,545 tokens.

Download SKILL.mdSave it as .claude/skills/solo/SKILL.md (or your agent's skills folder).
name
solo
description
Work on one hard mathematics problem in this session yourself, with no sub-agents: reason in stages, record each settled step in a notes file so that nothing written is lost if a response is cut off, and end with a self-contained proof.md. Usage: /math-proof:solo <the problem, stated in full, or the path of a file holding it>.
allowed-tools
Read, Write, Edit, Glob, Grep, Bash(mkdir *), Bash(cp *), Bash(cmp *)
argument-hint
[DIR=run-directory] <problem statement | problem-file>
disable-model-invocation
true
disallowed-tools
WebSearch, WebFetch, AskUserQuestion

math-proof: solo

You solve the problem yourself, in this session. There are no sub-agents and no rounds: just you, a notes file and, at the end, proof.md.

Arguments. The invoking message reads: $ARGUMENTS It gives the problem and, optionally, the run directory. Read it this way. A token of the form DIR=path at its start sets the run directory (the path quoted if it contains spaces); remove it. Any other leading token of the form NAME=value, where NAME is a word of two or more capital letters and underscores and value is a whole number, is a setting this skill does not have: tell the user in one sentence that /math-proof:solo takes only DIR=path before the problem (round and wave settings belong to /math-proof:siege), and that if the token is part of the problem itself the problem can be given as a file path instead, and stop. If what remains is a single line that, taken as a whole — surrounding whitespace and one pair of enclosing quotation marks removed, backslash-escaped spaces read as spaces — is the path of an existing file (it may contain spaces; check with Read or Glob, not the shell), that file is the problem file; if no such file exists and what remains can only be a file path — a single line ending in .md, .txt or .tex, or a single token (no spaces once the quotes are removed) containing "/" or "" — tell the user in one sentence that no file exists at the absolute path you looked for (give it) and that the problem can instead be given in full as text after the command, and stop; otherwise everything that remains, to the end of the message, IS the problem statement, verbatim — mathematics, line breaks and all ("n=3", "N=pq" and "AB=AC" are mathematics, not settings). The run directory DIR defaults to ./math-proof-solo under the current directory; use DIR's absolute path everywhere below. If the message holds neither a readable problem file nor any problem text, say so in one sentence — with the usage, /math-proof:solo <problem statement, or the path of a file holding it> — and stop.

Setup. The run's files are DIR/problem.md (the problem), DIR/notes.md (your notes) and DIR/proof.md (the deliverable). Create DIR with mkdir -p. If DIR/notes.md already exists, this problem was already being worked on in DIR: check that DIR/problem.md is the same problem you were given (compare the text, ignoring differences in whitespace and line endings; for a file, cmp) — if it differs, say in one sentence that DIR holds work on a different problem and that DIR=<another directory> selects a fresh one, and stop; if it is the same, read DIR/notes.md, and DIR/proof.md if it exists. If they record the solution as complete (proof.md written and nothing in the notes still to do), the earlier session finished: say where proof.md is and that DIR=<another directory> starts a fresh attempt, and stop. Otherwise the earlier session ended before it finished, and whatever reasoning it had not written down is lost: continue from the last point recorded there rather than starting over. If DIR/notes.md does not exist yet, put the problem at DIR/problem.md: if it came as a file, copy that file there byte for byte with cp; if it came as text in the invoking message, Write exactly that text (nothing added, removed or reworded). Then Read DIR/problem.md in full; it is the authoritative text of the problem. Use the shell for nothing but that mkdir, cp and cmp.

Show full SKILL.md (366 more words)Show less

The task. Solve the problem stated in DIR/problem.md; the deliverable is DIR/proof.md. After reasoning, write your answer. This task runs as a conversation that can span many messages, each with a bounded output allowance; a message that is cut off is normally followed by a request to continue, and only what you have WRITTEN (not unwritten reasoning) is guaranteed to carry into the next message. So write your work product out as you go, in a notes file, DIR/notes.md: whenever you settle something — a lemma and its proof, a reduction, a dead end and why it is dead, the precise statement you are now attempting — write it down before reasoning further. A partial answer is much more useful than none. Writing to the notes is not finishing — keep going after each write. Important: each message's output allowance also covers your private reasoning, and it is far smaller than a hard problem deserves — a message spent entirely on reasoning, with nothing written, gets cut off, and unwritten reasoning should be assumed lost. So do not try to finish in one message. Work in stages: early in EVERY message, before any long derivation, write your current plan and the precise statement you are attempting to DIR/notes.md; then reason toward the next concrete intermediate result, append it to the notes as soon as you have it, and continue. Many short written steps beat one long unwritten one. If a message of yours is cut off, re-read DIR/notes.md and continue from the last thing written there; never start over. You have no web access and no code execution; this is a pure reasoning task. When the problem is resolved, or you have taken it as far as you can, write your complete solution to DIR/proof.md. proof.md is read on its own by a referee who cannot open any other file (not your notes either), so it must be self-contained: every argument the solution relies on is written out in full there. Work unattended: there is no one to answer questions, so never stop to ask.

When DIR/proof.md is written, reply briefly: where proof.md is, and whether it resolves the problem completely or, in proof.md's own words, what it leaves open.

© anthropics, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in plugins/math-proof/skills/solo of anthropics/claude-plugins-official.

Open the folder on GitHubat commit 315c4e4

Compare with similar skills

Math Proof Solo next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Math Proof Solo compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Math Proof Solo this skillanthropics/claude-plugins-official38k—~1.5kAutomated safety check: PassApache-2.0
Proof Run Orchestratorwanshuiyin/Auto-claude-code-research-in-sleep17k1 repos~4.7kAutomated safety check: PassMIT
Recent Conjecture Evaluationsmorluto/jacobian211—~816Automated safety check: PassMIT
Harbor Benchmarksmorluto/jacobian211—~690Automated safety check: PassMIT
Audit Public Operation Contractsmorluto/jacobian211—~2kAutomated safety check: PassMIT
Learn From Math Agent Trajectoriesmorluto/jacobian211—~848Automated safety check: PassMIT

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Questions about Math Proof Solo

What does Math Proof Solo do?

Solves one hard mathematics problem in a single session without subagents, keeping settled steps in a notes file and ending with a self-contained proof.md. /math-proof-solo.md so nothing is lost if a response is cut off.

When should I use Math Proof Solo?

Math Proof Solo fits situations like: working through a hard proof with one agent doing all the reasoning; keeping a written trail of settled steps so a cut-off response loses nothing; producing a self-contained proof document for a stated problem.

How do I install Math Proof Solo in Claude Code?

Run `npx skills add anthropics/claude-plugins-official --skill solo -a claude-code`. Or copy the skill folder (plugins/math-proof/skills/solo in anthropics/claude-plugins-official) into .claude/skills/solo in your project. Claude Code loads it when a task matches its description.

How do I install Math Proof Solo in Codex?

Run `npx skills add anthropics/claude-plugins-official --skill solo -a codex`. Or copy the skill folder (plugins/math-proof/skills/solo in anthropics/claude-plugins-official) into .agents/skills/solo in your project. Codex loads it when a task matches its description.

Can I use Math Proof Solo in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add anthropics/claude-plugins-official --skill solo -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/solo, .gemini/skills/solo, .github/skills/solo and .opencode/skills/solo in your project.

What does Math Proof Solo need to run?

SKILL.md names no scripts, command-line tools or credentials: Math Proof Solo is instructions for the agent only. Our summary lists: A writable directory for problem.md, notes.md and proof.md. Its frontmatter pre-approves these tools: Read, Write, Edit, Glob, Grep, Bash(mkdir *), Bash(cp *), Bash(cmp *).

Does Math Proof Solo access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Math Proof Solo safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Math Proof Solo use?

Math Proof Solo is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Math Proof Solo use?

About 1.5k tokens (SKILL.md is roughly 6.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Math Proof Solo?

Skills that share tags, products or a category with Math Proof Solo: Proof Run Orchestrator (wanshuiyin/Auto-claude-code-research-in-sleep, 17k stars), Recent Conjecture Evaluations (morluto/jacobian, 211 stars), Harbor Benchmarks (morluto/jacobian, 211 stars) and Audit Public Operation Contracts (morluto/jacobian, 211 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Math Proof Solo?

anthropics (a GitHub organization, an official publisher) maintains it in anthropics/claude-plugins-official, which has 37,566 GitHub stars. The repository holds 29 skills in this directory. The repository was last updated on October 8, 2026.

Source: anthropics/claude-plugins-official on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.