paperclip/tests/runner-e2e/SECURITY.md

Runner E2E security for a public repository

This suite can spend provider money, expose four API credentials to isolated test processes, publish a container, retain private visual evidence, and write public structured evidence. Treat changes to the workflow, harness, fixture prompts, evidence packager, and publisher as security-sensitive production changes.

GitHub authorization

Set RUNNER_E2E_ALLOWED_ACTOR_IDS to a non-empty JSON array of numeric GitHub user IDs. Keep the list equal to the owners of .github/** in .github/CODEOWNERS. For example, use [123456,789012]. Resolve each ID from the authenticated CLI and verify the login before adding it:

gh api users/LOGIN --jq '{login,id}'

The paid workflows reject manual dispatches when the workflow definition does not come from the default branch. A trusted dispatcher may name any branch in paperclipai/paperclip as the code under test. The authorization job resolves that branch through the GitHub API and passes only its immutable commit SHA to a credential-free target-lock job. That job checks out the commit, regenerates pnpm-lock.yaml once with lifecycle scripts disabled and lockfile-only mode, then uploads the file under a run-attempt-scoped artifact ID. Catalog, image, shared-build, provider-pack, and paid test jobs download that exact artifact by ID, verify its recorded SHA-256, and restore it before setup or a frozen dependency install. The lock resolver receives no provider credentials and must never run repository lifecycle scripts. The shared-build and provider-pack jobs also receive no provider credentials and disable dependency lifecycle scripts; they package outputs with SHA-256 sidecars that consumers verify before extraction. The paid test job installs with lifecycle scripts disabled, and materializes the exact pinned OpenCode executable from its lockfile-verified optional package without invoking package lifecycle code. Provider secrets are scoped only to the final test step rather than dependency setup. Report sanitization and AWS history publication explicitly use the trusted workflow commit and do not consume the target lockfile. Never run the workflow definition from the target branch.

The workflows verify both the original actor and triggering actor for every scheduled or manual attempt, including human reruns. Every secret-bearing job repeats this check as its first step so GitHub's partial-job rerun feature cannot bypass a successful predecessor authorization job. The legacy manually dispatched E2E workflow uses the same gate. Numeric IDs are stable across username changes and prevent lookalike-name authorization.

The full-stack and live campaigns have one Sunday UTC schedule each and also support explicit manual dispatch. Their legacy-named nightly repository variables remain independent kill switches. Neither paid workflow accepts pull-request, push, workflow-run, or reusable-workflow triggers.

Protect the default branch, require review for workflow/harness paths, restrict workflow dispatch permission, and restrict repository variable/environment administration to the same trusted maintainers. Configure the organization to allow only approved GitHub Actions. A malicious change merged into the default branch executes with the same authority as the suite.

Every external action in the paid workflow is pinned to a full commit SHA. Keep the adjacent major-version comment for update tooling, and resolve and review a new immutable SHA before upgrading an action. The credential-free security test rejects mutable tag or branch references.

Secrets and protected environments

Create runner-e2e-paid, restrict deployments to the default branch, and put only OPENAI_API_KEY, ANTHROPIC_API_KEY, OPENROUTER_API_KEY, and DAYTONA_API_KEY in it. Do not duplicate these credentials as repository- or organization-level Actions secrets: environment scoping is the boundary that prevents branch or pull-request jobs from requesting them. Require approval from an account in RUNNER_E2E_ALLOWED_ACTOR_IDS for this environment and disable administrator bypass. The authorize, target-lock, catalog, image, report, history, and Pages jobs receive none of these secrets. Each full-stack matrix cell receives only its selected profile credential, plus Daytona only for Daytona cells. Secret-bearing and OIDC jobs use frozen installs without a shared dependency cache. On disposable GitHub Linux runners with Ubuntu's unprivileged-user-namespace restriction, the authorized default-branch workflow provisions an AppArmor profile before provider credentials are exposed. The profile is attached to the exact lockfile-pinned Codex executable. It grants userns so Codex can construct its filesystem sandbox; it does not disable the kernel restriction or Codex's workspace policy. Setup fails before invoking a model if the noninteractive profile load fails. Target-controlled tests only probe the existing sandbox and never invoke sudo or load host policy. This host-only profile disappears with the ephemeral runner. See Ubuntu's namespace restriction documentation. Local developer machines are never modified by this setup. Legacy Codex fixtures disable optional shell-environment snapshots to avoid persisting credentials; the secret scanner retains its existing rejection rules. The Paperclip server process also receives none; the browser posts each value once to the encrypted company secret API and agents/environments retain only secret references.

Create runner-e2e-history, also default-branch-only, for the OIDC publishing job. It contains no long-lived AWS key. Required reviewers may be added when a human approval on every nightly publication is acceptable; otherwise rely on the actor gate, environment branch restriction, and protected default branch.

Runner fleet isolation

When RUNNER_E2E_AWS_ENABLED=true, paid matrix cells use the exact RunsOn fleet selector runs-on/fleet=paperclip-public-pr-x64/env=public-ci, matching the AWS fleet selected by pr-trusted.yml only after its stable numeric-ID trust gate. Any other or missing toggle value falls back to the GitHub-hosted ubuntu-latest runner and its lower concurrency ceiling. The workflow chooses between those two reviewed literal labels; it never evaluates a configured runner label.

Keep both runner targets restricted to paperclipai/paperclip and workflows that independently authorize trusted source revisions. Never let a fork or untrusted pull-request workflow target them. The RunsOn fleet must launch a fresh ephemeral instance for every job, prohibit persistent runner reuse, and disable interactive SSH/debug access unless a separate incident procedure explicitly authorizes it.

Changing the runner does not widen who can authorize secret access. The paid workflow still has only schedule and manual triggers, requires its trusted definition to come from the protected default branch, requires allowlisted stable actor IDs before checkout, and repeats that authorization as the first matrix step. Provider credentials come only from the protected runner-e2e-paid environment. The fleet selector is an exact workflow literal; the only repository-controlled routing input is its boolean rollout switch, so configuration cannot redirect a secret-bearing job to an arbitrary runner.

The optional target branch is code, not workflow authority. A CODEOWNER who dispatches a target branch explicitly authorizes that branch's selected test process to receive the cell's scoped provider credential. The workflow resolves the target only inside the same repository, pins one SHA for the campaign, and checks it out only after authorization. Target-controlled code cannot replace the report sanitizer or the AWS history publisher. Fork refs and target-controlled workflow definitions do not enter this path.

AWS OIDC and S3

The AWS role trust policy should accept only GitHub's OIDC audience and the publishing environment subject:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "Federated": "arn:aws:iam::ACCOUNT_ID:oidc-provider/token.actions.githubusercontent.com"
      },
      "Action": "sts:AssumeRoleWithWebIdentity",
      "Condition": {
        "StringEquals": {
          "token.actions.githubusercontent.com:aud": "sts.amazonaws.com",
          "token.actions.githubusercontent.com:sub": "repo:paperclipai/paperclip:environment:runner-e2e-history"
        }
      }
    }
  ]
}

Grant only List on the bucket prefix and Get/Put on its objects. Do not grant Delete, ACL, bucket-policy, or wildcard-resource permissions:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": "s3:ListBucket",
      "Resource": "arn:aws:s3:::BUCKET",
      "Condition": {
        "StringLike": { "s3:prefix": ["runner-e2e", "runner-e2e/*"] }
      }
    },
    {
      "Effect": "Allow",
      "Action": ["s3:GetObject", "s3:PutObject"],
      "Resource": "arn:aws:s3:::BUCKET/runner-e2e/*"
    }
  ]
}

Enable S3 versioning, default encryption, and Block Public Access. Disable object ACLs. CloudFront receives read-only access through Origin Access Control; the bucket itself stays private. Log S3 data writes and alert on attempts to write outside the prefix or assume the role with a different subject.

Campaign prefixes are content-digested and immutable. The publisher refuses a different digest at an existing campaign key. Only the compact history and latest pointers are mutable, and S3 versioning makes those updates recoverable.

Public evidence boundary

CloudFront and GitHub Pages are public. Fixture identifiers, timing, token usage, costs, normalized results, allowlisted inert structured per-attempt evidence, and trusted runner PNG screenshots are expected public data. Each public screenshot must carry the explicit public-runner-fixture marker in the normalized result. This includes a failure.png capture. Screenshot paths must be safe PNG basenames and must be tied to the exact normalized execution ID and attempt. The runner capture helper accepts only the exact issue route for the live fixture that the harness created. Other issue routes, credential pages, setup pages, and administration pages fail closed. The CloudFront-backed S3 history also publishes one synthetic campaign-summary PNG generated by trusted publisher code solely from fixed catalog labels and sanitized numeric/status fields. Video, archives, generated Playwright/blob/HTML report trees, SVG or other active content, credentials, Paperclip homes, databases, workspaces, master keys, raw/unredacted logs, unmarked images, and unallowlisted files are not public. Allowlisted .log copies must pass the existing exact-value/key-shape scan and redaction boundary.

The packaged evidence uploaded as a 30-day GitHub Actions artifact has a different, broader boundary. Text is exact-value and key-shape scanned and redacted. PNG and WebM are raw-byte scanned; SVG is rejected during packaging because it is active content. Raster pixels cannot be exhaustively secret-scanned by bytes, so fixture authors must treat every marked capture as public and must never extend the allowed task route to credentials, secrets, private user data, or other non-public content. Adding or changing a marked capture requires review of the visible page state. Videos remain access-controlled.

Before permanent publication, the campaign publisher creates a separate S3 stage and retains only allowlisted .json, .log, .md, and .txt evidence, result PNGs with the explicit public-runner-fixture marker. It then launches publisher-only Chromium with networking blocked to render one public-images/campaign-summary.png. That fixed-path PNG is capped at 12 MiB and its signature is validated. Per-attempt XML is excluded because browsers can process XML/XSLT; the only public XML is the root junit.xml, which the report aggregator constructs from fixed markup and XML-escaped fields. Videos, archives, raw/unallowlisted logs, SVG, undeclared images, generated reports, and symlinks fail closed or are removed before the immutable manifest is calculated.

GitHub Pages is built from a second stage without the synthetic summary PNG but with the same trusted-fixture screenshot allowlist. A leak detected by the existing packager scan fails the cell and withholds the unsafe file.

Rotate the affected credential immediately if a secret-scanning failure or unexpected public object is observed. Preserve the access-controlled Actions artifact and S3 object versions for incident analysis; do not weaken scanning to make a campaign publish.