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chore(repo): add open-source project foundation
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‎.gitattributes‎

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* text=auto eol=lf
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*.sh text eol=lf
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*.go text eol=lf
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*.c text eol=lf
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*.h text eol=lf
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*.hpp text eol=lf
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*.java text eol=lf
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*.py text eol=lf
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*.rs text eol=lf

‎.github/workflows/ci.yml‎

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name: CI
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on:
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pull_request:
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push:
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branches: [main]
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permissions:
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contents: read
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jobs:
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verify:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v5
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- uses: actions/setup-go@v6
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with:
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go-version-file: go.mod
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cache: true
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- name: Repository hygiene
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run: sh scripts/check-repository-hygiene.sh
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- name: Format
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run: test -z "$(gofmt -l .)"
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- name: Test
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run: go test ./...
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- name: Vet
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run: go vet ./...

‎.gitignore‎

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.DS_Store
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.env
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.env.*
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!.env.example
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*.log
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*.out
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*.test
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__pycache__/
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*.py[cod]
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/bin/
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/build/
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/dist/
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/coverage/
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/reports/
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/tmp/
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/.claude/
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/.codex/
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/.docdex/
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/AGENTS.md
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/PLAN.md
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**/prompt.md
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**/transcript*.jsonl
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**/pi-sessions/

‎CONTRIBUTING.md‎

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# Contributing
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Keep changes focused on the execution protocol, runners, compiler profiles,
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language SDKs, or conformance coverage. Challenge-specific educational content
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and workloads belong in the challenges repository.
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Before opening a pull request:
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```bash
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gofmt -w .
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go test ./...
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go vet ./...
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sh scripts/check-repository-hygiene.sh
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```
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Protocol and SDK changes must document compatibility effects and add conformance
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coverage for every affected language. Do not commit participant submissions,
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hidden evaluations, credentials, local build products, generated reports, model
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transcripts, or orchestration prompts.

‎LICENSE‎

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Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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Notwithstanding the above, nothing herein shall supersede or modify
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8. Limitation of Liability. In no event and under no legal theory,
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END OF TERMS AND CONDITIONS
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APPENDIX: How to apply the Apache License to your work.
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To apply the Apache License to your work, attach the following
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Copyright 2026 Rough Stack contributors
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Licensed under the Apache License, Version 2.0 (the "License");
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‎NOTICE‎

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Rough Stack execution runtime
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Copyright 2026 Rough Stack contributors
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This product is licensed under the Apache License, Version 2.0.

‎README.md‎

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# Rough Stack execution runtime
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This repository contains the execution protocol, runner, language SDKs, and
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conformance tests used by Rough Stack challenges.
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The current pre-release runtime supports Go, Python, C, C++, Java, and Rust over
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a line-delimited JSON protocol. It includes deterministic SSD and compaction
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reference tasks inherited from the original platform implementation. Those tasks
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are compatibility fixtures, not the long-term boundary for challenge-specific
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simulation logic.
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## Responsibilities
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- Define and version the language-neutral execution protocol.
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- Provide thin SDK bindings for supported languages.
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- Compile and run participant code under explicit resource limits.
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- Keep participant diagnostics separate from protocol output.
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- Verify equivalent behavior through cross-language conformance tests.
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- Support local and remote runner adapters without binding the platform to one
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hosting provider.
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Challenge statements, public workloads, and scoring metadata belong in
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[`roughstack/challenges`](https://github.com/roughstack/challenges). Hidden
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workloads and calibration data belong in the private official-evaluation
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repository. The web application consumes versioned runtime artifacts and does not
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own SDK releases.
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## Verification
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```bash
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go test ./...
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go vet ./...
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sh scripts/check-repository-hygiene.sh
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```
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The conformance suite invokes the toolchains available on the host. A missing
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optional compiler skips only that language case; CI is responsible for providing
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the complete supported toolchain matrix before release.
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## Compatibility note
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Some SDK filenames, protocol strings, and diagnostic prefixes still use the
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`bytearena` name. They are preserved temporarily so extraction does not silently
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break existing submissions. They will move to Rough Stack names through one
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versioned compatibility release before `v1.0.0`.
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## Security
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This code processes untrusted participant programs. The runner protocol and
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language bindings are not a sandbox by themselves. Read [SECURITY.md](SECURITY.md)
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before deploying an execution backend or reporting a vulnerability.
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## License
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Licensed under the [Apache License 2.0](LICENSE). See [NOTICE](NOTICE).

‎SECURITY.md‎

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# Security policy
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Report sandbox escapes, protocol injection, resource-limit bypasses, path
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traversal, cross-submission data exposure, result forgery, or secret leakage
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through GitHub's private vulnerability reporting. Do not publish exploit details
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in an issue, discussion, pull request, fixture, or test log.
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The SDKs and runner protocol do not provide process isolation. A production
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deployment must place compilation and execution inside a separately reviewed
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sandbox with no ambient credentials, no writable host mounts, denied network
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egress, bounded output, and enforced CPU, memory, process, and wall-clock limits.
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Security fixes target the current `main` branch until versioned releases are
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published.

‎scripts/check-repository-hygiene.sh‎

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#!/bin/sh
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set -eu
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tracked_paths=$(git ls-files)
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forbidden=$(printf '%s\n' "$tracked_paths" | grep -E '(^|/)(node_modules|coverage|reports|tmp|pi-sessions)(/|$)|(^|/)(AGENTS\.md|PLAN\.md|prompt\.md|transcript[^/]*\.jsonl|\.DS_Store)$|\.(log|out|test|pyc|class|o|so|dylib|dll|exe)$|(^|/)\.env($|\.)' | grep -v '^\.env\.example$' || true)
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if [ -n "$forbidden" ]; then
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echo "error: generated, private, or machine-local artifact is tracked" >&2
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printf '%s\n' "$forbidden" >&2
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exit 1
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fi
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if git grep -I -l -E 'ByteArena-Open-Source-Pivot-Spec|roughstack-arena-generation-spec|root_byteareana|work/(ollama-runs|worktree-runs)' -- . ':(exclude)scripts/check-repository-hygiene.sh' >/dev/null 2>&1; then
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echo "error: private workspace reference found" >&2
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exit 1
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fi
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echo "repository hygiene checks passed"

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