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Solo

AnthropicOfficialPublished by Anthropic

  • Skill
  • Workflow
  • Science and research
  • Apache-2.0
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From the author

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>.
— the description by Anthropic

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

The solo skill provides a rigorous, state-aware framework for tackling challenging mathematical problems. It enforces a disciplined approach where the agent works independently, recording every logical step, lemma, and dead end into a persistent notes file. This ensures that reasoning is preserved across multiple message turns, preventing loss of progress due to output limits. The process culminates in the creation of a self-contained proof.md file, ensuring the final result is accessible and verifiable without external context.

What it does

  • Establishes a dedicated directory for problem-solving artifacts.
  • Maintains a persistent notes file to track reasoning stages and intermediate results.
  • Prevents loss of progress by requiring frequent updates to the notes file.
  • Supports resuming interrupted sessions by reading existing notes.
  • Generates a final, self-contained proof document.
  • Operates entirely through internal reasoning without external tool dependencies.

When to use it

  • When you need to solve a complex mathematical problem that requires multi-step logical derivation.
  • When the problem is too large to be solved within a single message's output limit.
  • When you want to ensure a clear, documented trail of your mathematical reasoning.
  • When you need a final, standalone proof document as the primary deliverable.

Advantages

  • Resilient against session timeouts or message length constraints.
  • Ensures logical consistency by forcing explicit documentation of each step.
  • Provides a clear audit trail of the problem-solving process.
  • Enables long-term, multi-turn engagement with difficult proofs.

Usage examples

“/math-proof:solo Prove that there are infinitely many prime numbers.”
The agent creates a directory, initializes notes.md, and begins a multi-stage proof, documenting each step until a final proof.md is generated.
“/math-proof:solo DIR=./fermat_work /path/to/fermat_problem.txt”
The agent reads the problem from the specified file, sets up the workspace in the given directory, and begins the proof process.

Install

  1. Download the skill as a ZIP:

    https://mp-staging.autogineer.com/agent-skills/anthropics/solo/download
  2. Unzip it into the cross-client skills folder of your project:

    mkdir -p .agents/skills && unzip solo.zip -d .agents/skills

Documentation by Anthropic

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.

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.

Files

Requirements and compatibility

Written for: Claude Code, Claude apps

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Needs: Declares allowed tools, Claude Code frontmatter

Security

No issues found by our static scan· No issues found

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Attribution and licence

Published by
Anthropic
Publisher
Anthropic (Official)
Source
anthropics/claude-plugins-official · plugins/math-proof/skills/solo · commit 0412be7
Licence
Apache License 2.0 (redistribution allowed)
  • LICENSE (added by AutoGineer from plugins/math-proof/LICENSE)
  • ATTRIBUTION.md (written by AutoGineer)
Synced

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Download ZIP

The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download solo.zip