apm-wo-analysis

Daily analysis of Amazon APM work-order "Last Comment" data for Sea Haven facility ops. A curated daily filter-view export (~350 work orders) is classified on two axes, pushed to Slack, and surfaced in a self-hosted Grafana dashboard. Replaces a legacy Google Apps Script + versioned-Google-Sheet workflow.

This is a sibling concern to the apm@ email pipeline in procurement-ingest — it consumes a different feed (the manual export) and does not read those tables. There is deliberately no DynamoDB: this is an analytics workload backed by S3 + Athena (Grafana cannot query DynamoDB).

• Account / region: 328440206208 / us-east-1
• IaC: CDK (Python), aws-cdk-lib==2.253.1. Lambdas Python 3.12, ARM64.

Architecture

APM export (xlsx/csv)
  → S3 raw/  (direct upload OR local launchd drop-folder)
      → classifier Lambda (HTML strip + two-axis classify, Haiku fallback)
          → S3 analytics/dt=YYYY-MM-DD/  (per-WO daily snapshot, Parquet)
                → Glue table → Athena → Grafana (self-hosted EC2, VPN-only, kiosk)
          → slack-post Lambda (reads today + yesterday partitions)
                → daily summary post  [📊 Open dashboard button]
                → standalone batched 3rd-escalation alert (suppressed if zero)

Two CDK stacks:

Stack	Resources
apm-wo-analysis-pipeline	S3 exports bucket, classifier + slack-post Lambdas, Glue database, Athena workgroup, IAM
apm-wo-analysis-grafana	EC2 (Grafana OSS), internal ALB, security group, Route53, Athena datasource IAM role

The classification model

Always two-axis, never comment-only. The legacy script's central flaw was reading only the comment while ignoring WO Status + Hold Reason, which left ~17% in "Other". The two-axis model cuts that to ~9% before any AI — and on the real 347-row export the current implementation lands "Other" at 5.2% (18 rows) with 18 mismatches flagged.

• Axis 1 — comment intent: regex over the HTML-stripped Last Comment, most-specific first (escalations → SIM ticket → vendor no-show → scheduling → reports → completion → … → other).
• Axis 2 — structured state: Hold Reason → category and WO Status signals (RCAN→Cancelled, H corroborates On Hold, IP/R/RR in-flight).
• Resolution: comment intent wins when confident → else structured state → else Other. A Claude Haiku fallback (Secrets Manager) is reserved for ambiguous free-text with no structured signal.
• Mismatch detector (a feature): flags when comment intent contradicts structured state. Surfaced, never suppressed.

The authoritative spec lives in CLAUDE.md; the implementation is in lambdas/classifier/classify.py (owned by the classifier-engineer agent). The S3-triggered lambdas/classifier/handler.py parses each export, classifies every non-blank-comment row, writes a per-WO Parquet snapshot to analytics/dt=YYYY-MM-DD/ (registering the Glue partition via awswrangler), and emits a summary.json for the Phase 4 slack-post Lambda.

Repository layout

cdk/
  app.py                 CDK entry point — instantiates both stacks
  cdk.json
  requirements.txt       aws-cdk-lib==2.253.1, constructs>=10.6.0
  stacks/
    pipeline_stack.py    S3, Lambdas, Glue, Athena, IAM
    grafana_stack.py     VPC import, EC2, ALB, SG, Route53, datasource role
lambdas/
  classifier/            S3-triggered: parse → two-axis classify → Parquet
  slack_post/            builds + posts the daily summary and alert
grafana/
  provisioning/          Athena datasource + dashboard provider (as code)
  dashboards/            committed dashboard JSON (source of truth)
scripts/                 local drop-folder uploader + launchd plist
tests/                   classifier smoke test
docs/BUILD.md            phased, end-to-end build guide

Configuration

Where	What
Secrets Manager	apm-wo-analysis/anthropic-api-key (Haiku fallback); apm-wo-analysis/slack-credentials = { botToken, signingSecret, channelId } (reused Slack app).
SSM Parameter Store	/apm-wo-analysis/grafana-base-url (the 📊 dashboard button / modal overflow link; ops-editable).
GitHub repo secret	AWS_DEPLOY_ROLE_ARN — the OIDC deploy role githubdeploy-apm-wo-analysis.

No secrets in Lambda environment variables.

Ingestion (no email)

The export reaches S3 by direct upload or a local drop-folder, never SES/email.

• Direct: aws s3 cp ./export.xlsx s3://apm-wo-analysis-exports-328440206208/raw/

• Drop-folder (optional zero-touch): a launchd agent (scripts/apm-wo-uploader.sh

  • scripts/com.seahaven.apm-wo-uploader.plist) that watches ~/apm-wo-drop/, uploads new .xlsx/.csv files to raw/, and archives them to uploaded/. It uploads with the scoped apm-wo-drop AWS profile (IAM user apm-wo-drop-uploader — s3:PutObject on raw/* only).

  Install (the runnable copy must live outside ~/Documents — macOS TCC sandbox; a repo-path script fails silently with LastExitStatus=32256):

  install -d "$HOME/.local/bin" "$HOME/apm-wo-drop"
  cp scripts/apm-wo-uploader.sh "$HOME/.local/bin/apm-wo-uploader.sh"
  chmod +x "$HOME/.local/bin/apm-wo-uploader.sh"
  cp scripts/com.seahaven.apm-wo-uploader.plist "$HOME/Library/LaunchAgents/"
  launchctl load -w "$HOME/Library/LaunchAgents/com.seahaven.apm-wo-uploader.plist"
  

  Re-copy the script to ~/.local/bin after editing the repo source. Configure the profile once with the uploader's access key: aws configure --profile apm-wo-drop.

The classifier Lambda is S3-triggered on the raw/ prefix regardless of path (any .xlsx/.csv landing under raw/ invokes it).

Deployment

CI/CD via the org reusable workflows (no manual prod deploys):

• CI (.github/workflows/ci.yaml) → ci-python-sam.yaml@main: ruff + cdk synth.
• Deploy (.github/workflows/deploy.yaml) → cd-cdk.yaml@main: OIDC assume-role, cdk deploy --all, single-flight concurrency.

The OIDC deploy role must exist before the first deploy. Deploy order:

cd cdk && pip install -r requirements.txt
cdk deploy apm-wo-analysis-pipeline   # S3, Glue, Athena, Lambdas, IAM
cdk deploy apm-wo-analysis-grafana    # EC2, ALB, SG, Route53, datasource role

Local development

• pyenv Python 3.12; ruff check + ruff format --check before pushing (hook-enforced).
• Smoke-test the classifier against a real export before declaring any classification change done: ~/Downloads/_documents/Sheet1-1.xlsx.
• cdk synth must pass in CI before merge.

Status

Phase 4 — Slack surfaces (in review). Build-out proceeds per docs/BUILD.md: ingestion → classifier → Glue/Athena → Slack → Grafana → docs.

• Phase 0 scaffold — merged-pending (PR #6).
• Phase 1 ingestion (S3 bucket, drop-folder uploader, OIDC deploy role) — deployed; PR #7 open.
• Phase 2 classifier Lambda + Glue database + S3 raw/ trigger — implemented and cdk synth-green; PR #8 open (stacked on Phase 1, not yet deployed).
• Phase 3 apm_wo_snapshots projection table + Athena workgroup — implemented and cdk synth-green; PR #9 open (stacked on Phase 2). The classifier writes pure Parquet and holds no Glue access (projection handles partitions).
• Phase 4 Slack post + interactions Lambdas (daily summary, batched 3rd-escalation alert, drill-down modals on apm-wo.seahaven.com) — implemented and cdk synth-green; PR #10 open (stacked on Phase 3). App manifest in slack/manifest.yaml.
• Phases 5–6 (Grafana, final docs) — not started.