pdftract-3i1o: CI Observability Implementation

Bead: pdftract-3i1o

Phase: 0.10 CI observability — green-run smoke test and status reporting Date: 2026-05-23

Summary

Implemented CI observability features for pdftract-ci workflow:

exitHandler (on-exit template): Posts workflow status to GitHub PR via argo-workflows-pr-status operator
Setup step (setup template): Captures and uploads workflow-metadata.json artifact

Implementation Details

1. Exit Handler (`on-exit` template)

Location: .ci/argo-workflows/pdftract-ci.yaml lines 213-316

Features:

Posts to cluster-local service: https://argo-pr-status.argo-workflows.svc.cluster.local/v1/report
Uses curlimages/curl:latest image for HTTP POST
Payload includes:
- commit_sha: Full Git commit SHA
- ref: Git ref (branch/tag)
- workflow_phase: Overall workflow status (Succeeded/Failed/Error)
- started_at: Workflow creation timestamp
- duration_seconds: Workflow duration in seconds
- step_outcomes: Map of step name to phase (Succeeded/Failed)
- artifacts: List of artifact names produced
- dashboard_url: Link to Argo UI workflow view

Matrix step expansion: Each matrix item is reported as a separate GitHub Check:

build-linux-x86_64-musl
build-linux-aarch64-musl
build-darwin-x86_64
build-darwin-aarch64
build-windows-x86_64-gnu
test-glibc
test-musl
clippy-fmt
msrv-check
cargo-audit
cargo-deny
cargo-bloat
bench-matrix
regression-corpus

Graceful degradation: If the pr-status operator is not yet deployed, the exitHandler logs a warning but does not fail the workflow.

2. Setup Step (`setup` template)

Location: .ci/argo-workflows/pdftract-ci.yaml lines 318-435

Features:

Clones repository to /workspace
Checks out specific commit SHA
Captures git metadata (remote URL, describe, author, commit message)
Records container image versions for reproducibility
Creates workflow-metadata.json artifact

Workflow metadata structure:

{
  "commit_sha": "abc123...",
  "ref": "refs/heads/main",
  "git_remote_url": "https://github.com/jedarden/pdftract.git",
  "git_describe": "v0.1.0-0-g1a2b3c4",
  "git_author": "Author Name <email@example.com>",
  "git_commit_message": "Commit message",
  "pdftract_ci_template_sha": "def456...",
  "workflow_parameters": {
    "commit-sha": "abc123...",
    "ref": "refs/heads/main",
    "repo-url": "https://github.com/jedarden/pdftract.git",
    "is-tag": "false",
    "regression-mode": "gate",
    "pr-number": "",
    "proptest-seed": "",
    "proptest-cases": "10000"
  },
  "container_images": {
    "build:x86_64-unknown-linux-musl": "ghcr.io/cross-rs/x86_64-unknown-linux-musl:main",
    ...
  },
  "workflow_name": "pdftract-ci-xxxxx",
  "argo_ui_url": "https://argo-ci.ardenone.com/workflows/argo-workflows/pdftract-ci-xxxxx",
  "timestamp": "2026-05-23T12:34:56Z"
}

Acceptance Criteria Status

PASS

exitHandler posts to pr-status operator on every workflow completion
workflow-metadata.json artifact is uploaded by every workflow
exitHandler and setup templates handle missing pr-status operator gracefully (WARN, not FAIL)
Matrix step outcomes are expanded per-item for granular GitHub Checks

WARN

Smoke test PR not created: The pr-status operator is not yet deployed in iad-ci cluster
- The exitHandler logs "WARN: Failed to post status (operator may not be deployed yet)"
- This is expected during initial CI setup
- Once the operator is deployed, the smoke test PR should demonstrate the green run

FAIL

None

References

Commit: f3095d1 - ci(pdftract-3i1o): implement CI observability with exitHandler and workflow metadata
Workflow template: .ci/argo-workflows/pdftract-ci.yaml
Argo UI: https://argo-ci.ardenone.com
Plan: Phase 0, line 1013

Next Steps

Deploy argo-workflows-pr-status operator to iad-ci cluster
Create smoke test PR on pdftract-ci-smoke-<date> branch
Verify green run with all GitHub Checks appearing in PR
Mark PR with do-not-merge label after demonstration

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