{"id":51371102,"url":"https://github.com/sequencestream/c3","last_synced_at":"2026-07-03T07:00:37.404Z","repository":{"id":365827868,"uuid":"1260524906","full_name":"sequencestream/c3","owner":"sequencestream","description":"code creative center - harness/loop engineering for AI software work","archived":false,"fork":false,"pushed_at":"2026-07-03T05:03:28.000Z","size":736,"stargazers_count":1,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"main","last_synced_at":"2026-07-03T07:00:14.417Z","etag":null,"topics":["ai","claude-code","code","codex","harness","harness-engineering","loop-engineering"],"latest_commit_sha":null,"homepage":"","language":"Shell","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/sequencestream.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2026-06-05T15:28:33.000Z","updated_at":"2026-07-03T04:48:01.000Z","dependencies_parsed_at":null,"dependency_job_id":null,"html_url":"https://github.com/sequencestream/c3","commit_stats":null,"previous_names":["sequencestream/c3"],"tags_count":2,"template":false,"template_full_name":null,"purl":"pkg:github/sequencestream/c3","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sequencestream%2Fc3","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sequencestream%2Fc3/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sequencestream%2Fc3/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sequencestream%2Fc3/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/sequencestream","download_url":"https://codeload.github.com/sequencestream/c3/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sequencestream%2Fc3/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":35075805,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-26T15:22:16.424Z","status":"online","status_checked_at":"2026-07-03T02:00:05.635Z","response_time":110,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["ai","claude-code","code","codex","harness","harness-engineering","loop-engineering"],"created_at":"2026-07-03T07:00:19.519Z","updated_at":"2026-07-03T07:00:37.390Z","avatar_url":"https://github.com/sequencestream.png","language":"Shell","funding_links":[],"categories":[],"sub_categories":[],"readme":"# c3\n\n**c3 (Code Creative Center)** is a coding platform that fuses harness and loop\nengineering with AI software-engineering practice. Instead of throwing a raw prompt at a\nmodel and hoping for the best, c3 turns vague, half-formed requirements into structured\nintents — each with a clear scope, explicit dependencies, and a verifiable definition of done.\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cimg src=\"images/c3-agents.png\" alt=\"c3 agents\" width=\"100%\"\u003e\u003c/td\u003e\n\u003ctd\u003e\u003cimg src=\"images/c3-sessions.png\" alt=\"c3 sessions\" width=\"100%\"\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/table\u003e\n\n## Features\n\n- **Structured intents** — vague requirements become scoped, dependency-aware tasks with a verifiable definition of done.\n- **Automated loops** — planning, implementation, and validation run as repeatable, auditable flows.\n- **Multi-agent discussions** — perspectives converge before code is written.\n- **Consensus voting** — multi-agent approval gates before critical decisions.\n- **Worktree isolation** — parallel tasks run in isolated git worktrees.\n- **Sandbox execution** — untrusted code runs in sandboxed environments.\n- **Circuit breaker** — automatic token rate limiting and recovery for agents.\n- **Scheduled tasks** — long-running and recurring work keeps moving on its own.\n- **SDD-native supported** — spec-driven development as a first-class workflow.\n\n## Documentation\n\nSee the [c3 documentation](doc/README.md).\n\n## Prerequisites\n\nOptional tools:\n- **GitHub CLI** — `brew install gh`, or see [cli.github.com](https://cli.github.com/).\n- **GitLab CLI** — `brew install glab`, or see [gitlab.com/gitlab-org/cli](https://gitlab.com/gitlab-org/cli).\n\n## Install\n\n### Homebrew\n\n```bash\nbrew install sequencestream/tap/c3\n```\n\n### Install script\n\n**macOS / Linux:**\n\n```bash\ncurl -fsSL https://raw.githubusercontent.com/sequencestream/c3/main/install.sh | sh\n```\n\n**Windows (PowerShell):**\n\n```powershell\nirm https://raw.githubusercontent.com/sequencestream/c3/main/install.ps1 | iex\n```\n\nThe script always fetches the latest release for your platform, verifies its checksum, and installs `c3` (to `~/.local/bin` on macOS/Linux, or `%LOCALAPPDATA%\\c3\\bin` on Windows). Set `C3_INSTALL_DIR` to choose a different location, or `C3_VERSION` to pin a specific version.\n\n### Manual download\n\nGrab the latest build for your platform from the [releases page](https://github.com/sequencestream/c3/releases/) and extract it:\n\n```bash\n# e.g. c3-v0.8.0-macos-arm64.tar.gz\ntar -xzvf c3-v0.8.0-macos-arm64.tar.gz\n```\n\n\u003e **macOS note:** the first launch may trigger a security warning. Allow c3 to run in *System Settings → Privacy \u0026 Security*.\n\n## Upgrade\n\n### Built-in upgrade command\n\n```bash\nc3 upgrade\n```\n\nThe `upgrade` command downloads the latest release, verifies its signature, and replaces the current binary. It never restarts a running c3 — after upgrading, run `c3 restart` (or exit and rerun) to load the new version.\n\nOptions:\n- `--check` — only compare versions, do not download or replace.\n- `--force` — reinstall the same version (does not downgrade).\n\n### Other upgrade methods\n\n**Homebrew:**\n\n```bash\nbrew upgrade c3\n```\n\n**Install script:**\n\nRe-run the install script — it always fetches the latest release:\n\n```bash\ncurl -fsSL https://raw.githubusercontent.com/sequencestream/c3/main/install.sh | sh\n```\n\n## Usage\n\nStart c3 on port 9000:\n\n```bash\n# Installed via Homebrew or the install script (c3 is on your PATH)\nc3 --port 9000\n\n# Or, from a manual download (run the extracted binary directly)\n./c3 --port 9000\n```\n\nThen open http://localhost:9000 in your browser. (`c3 --port 9000` is shorthand for `c3 start --port 9000`.)\n\n### Run in the background\n\nAdd `--daemon` to detach from the terminal and keep c3 running in the background:\n\n```bash\nc3 --port 9000 --daemon\n```\n\n### Install as a service\n\nRegister c3 as a per-user OS service (systemd on Linux, launchd on macOS, schtasks on Windows) so it starts automatically and stays running:\n\n```bash\nc3 install --port 9000\n```\n\nThe port and workspace are baked into the service unit. Run `c3 install --help` for the full set of options.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsequencestream%2Fc3","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fsequencestream%2Fc3","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsequencestream%2Fc3/lists"}