1 Commits

Author	SHA1	Message	Date
Jannes Stubbemann	398d746093	build(agent-runtime): harness runtime images for sandboxed execution (stage 3/3) (#7934) ... > [!NOTE] > This is **stage 3 of 3** of the staged Kubernetes contribution: stage 1 is the kubernetes sandbox-provider plugin (#5790), stage 2 is the provider backend/hardening refresh filed separately, and this stage ships the runtime images those sandboxes run. ## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work > - Sandboxed agent execution (Refs #248) runs each agent turn in an isolated environment; the kubernetes sandbox provider (stage 1, #5790) schedules those runs as hardened pods > - A sandbox pod needs a runtime image with the harness CLI preinstalled: installing CLIs at run start is slow, flaky, and needs network egress the sandbox should not have > - There is no first-party image family for this, so every deployer would have to hand-roll Ubuntu + Node + CLI images per harness and solve signal handling, non-root, and image chaining themselves > - This PR ships the agent-runtime image family: a hardened base (non-root uid 1000, tini, git, the agent shim) plus one derived image per harness, a buildx bake file that chains them, and a publish workflow with cosign keyless signing > - The benefit is that any sandbox infrastructure, the kubernetes provider or otherwise, gets ready-made, signed, security-hardened per-harness runtime images that are verified in production across five harnesses ## Linked Issues or Issue Description Refs #248 (sandboxed agent execution proposal) and #5790 (the kubernetes sandbox provider, stage 1 of this contribution, which consumes these images as per-run runtime images via its adapter defaults). No issue covers the image gap itself, described in-PR: sandbox providers reference `ghcr.io/paperclipai/agent-runtime-*` images, but the repository contains neither the Dockerfiles nor the workflow that builds and publishes them. Without this, self-deployers cannot reproduce or audit the images their agent runs execute in. ## What Changed - `docker/agent-runtime/Dockerfile.base`: foundation image. Ubuntu 22.04 + Node 22 + git + tini (PID 1, signal propagation) + non-root `paperclip` user (uid/gid 1000) + the agent shim compiled in a Go build stage. `WORKDIR /workspace`, entrypoint `tini -- paperclip-agent-shim`. - One derived Dockerfile per harness: `opencode` (opencode-ai), `pi` (@mariozechner/pi-coding-agent), `codex` (@openai/codex), `gemini` (@google/gemini-cli, plus headless auth-mode settings), `claude` (@anthropic-ai/claude-code, symlinked as `claude-code`). Each installs the CLI as root, returns to uid 1000, and asserts the binary is on PATH at build time. - `acpx` and `hermes` Dockerfiles are included in the bake group but are not in the default publish scope (hermes is a stub until a CLI package exists). - `docker/agent-runtime/buildx-bake.hcl`: builds the whole family in one pass. Derived targets chain off the `base` target through bake `contexts` (the literal registry in each `FROM` is overridden to `target:base` at build time, so no intermediate push is needed). `REGISTRY` (default `ghcr.io/paperclipai`) and `VERSION` are overridable variables. - `tools/agent-shim/`: a small Go shim that runs as the container command. It reads `/run/paperclip/runtime-command.json` (`{ "command", "args" }`), resolves the harness CLI on PATH, and `syscall.Exec`s it so SIGTERM from the kubelet reaches the harness directly. Harness-agnostic, with unit tests. - `.github/workflows/agent-runtime-images.yml`: builds and pushes the default scope (base, opencode, pi, codex, gemini, claude) for linux/amd64 on `workflow_dispatch` (explicit version tag) or pushes to `master` touching these paths, then signs every digest with cosign keyless OIDC. Uses only `GITHUB_TOKEN`; no extra secrets. - `docker/agent-runtime/README.md`: image lineup, base contents, local build instructions, the runtime-command contract, and the security model. Additive only: nothing in the product loads these images. Deployments opt in via their sandbox provider configuration (for example the kubernetes plugin's image settings). ## Verification - `cd tools/agent-shim && go build ./... && go test ./... && go vet ./...`: all passing. - `docker buildx bake -f docker/agent-runtime/buildx-bake.hcl --print base opencode pi codex gemini claude`: resolves cleanly; every tag and build context lands on `ghcr.io/paperclipai/agent-runtime-*` and derived targets map the base ref to `target:base`. - Workflow YAML validated (parses, single job, no org-specific secrets). - This exact image family (built from these Dockerfiles, bake file, and workflow) is what runs agent execution in production on paperclip.inc, verified end-to-end across five harnesses (opencode, pi, codex, gemini, claude): each as a full loop from assigned issue to per-run runtime image in a sandboxed pod to completed run. ## Risks - Low risk: purely additive, nothing in paperclip-server or the UI references these files. The workflow only triggers on its own paths. - Derived images install harness CLIs `@latest` at build time; a broken upstream CLI release would surface at image build, not at run time, and the PATH assertion fails the build rather than shipping a broken image. - The hermes image is an explicit stub (documented in its Dockerfile) until a hermes CLI package exists; it is outside the default publish scope. - cosign signing is keyless OIDC with the workflow identity; no long-lived signing keys are introduced. ## Model Used Claude Opus 4.8 (claude-opus-4-8, 1M context, extended thinking, tool use via Claude Code). ## Checklist - [x] I have included a thinking path that traces from project context to this change - [x] I have specified the model used (with version and capability details) - [x] I have checked ROADMAP.md and confirmed this PR does not duplicate planned core work - [x] I have searched GitHub for duplicate or related PRs and linked them above - [x] I have either (a) linked existing issues with `Fixes: #` / `Closes #` / `Refs #` OR (b) described the issue in-PR following the relevant issue template - [x] I have run tests locally and they pass - [x] I have added or updated tests where applicable - [x] If this change affects the UI, I have included before/after screenshots (no UI changes) - [x] I have updated relevant documentation to reflect my changes - [x] I have considered and documented any risks above - [ ] All Paperclip CI gates are green - [ ] Greptile is 5/5 with no open P2s, recommendations, or follow-ups - [x] I will address all Greptile and reviewer comments before requesting merge --------- Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-06-10 21:10:23 -07:00