/amc-run-sample-calibration

name: "amc-run-sample-calibration"
description: "Run end-to-end calibration on the shipped sample dataset (sdg_08_2_sample_data_010926.zip) against a running AMC microservice. Use when user says 'test sample dataset', 'run sample calibration', 'verify AMC install', or 'launch and test'."
owner: "NVIDIA CORPORATION"
service: "auto-magic-calib"
version: "1.0.0"
reviewed: "2026-04-28"
license: "Apache-2.0"
metadata:
  author: "NVIDIA CORPORATION"
  tags: [amc, calibration, sample, rest-api, validation, python]

Skill: Calibrate Sample Dataset

When to Use This Skill

Activate this skill when the user wants to sanity-check a running AMC stack with the bundled sample dataset. Typical prompts:

• "test the sample dataset" / "run sample calibration"
• "verify AMC install"
• "launch and test" (chain with `amc-setup-calibration-stack` if the MS isn't already running)

**Do NOT use this skill when:**

• The user references their own video paths (e.g. `/data/videos/`, `cam_*.mp4` not from the bundled zip) — route to `amc-run-video-calibration`.
• The user provides live RTSP streams or `rtsp://...` URLs — route to `amc-run-rtsp-calibration`.
• This skill is exclusively for `assets/sdg_08_2_sample_data_010926.zip`.

Prerequisite: AMC microservice running on a port in 8000-8009. If no backend is detected, delegate to `amc-setup-calibration-stack` first.

If execution cannot proceed in the current environment (no backend, missing sample data, etc.), surface the blocker AND describe the expected workflow + API sequence concisely so the user understands what will run once prerequisites are met. Do not fabricate calibration outputs, evaluation metrics, or trajectories.

Overview

Run a full calibration on the bundled sample dataset (`sdg_08_2_sample_data_010926.zip`, 4 synthetic warehouse cameras with ground truth) against a running AutoMagicCalib microservice. Useful for verifying that a freshly-launched stack works end-to-end before throwing real data at it.

The sample includes GT, so the run produces evaluation metrics (L2 distance, reprojection error) — no calibration parameter tuning needed.

Prerequisites

• [ ] AMC microservice running (follow `skills/amc-setup-calibration-stack/SKILL.md` if not)
• [ ] Sample zip present at `assets/sdg_08_2_sample_data_010926.zip`
• [ ] Python 3 with `requests` available, or use the Swagger UI path below
• The bundled script self-heals: if `requests` is missing it creates a throwaway venv under `${TMPDIR:-/tmp}/amc-sample-test-venv` (nothing written to the repo)
• If `python3 -m venv` itself fails with `ensurepip not available`: `sudo apt install -y python3-venv python3-pip`

Instructions

**"launch AMC and test sample dataset" (or similar):**

1. Run `skills/amc-setup-calibration-stack/SKILL.md` first. 2. Wait for `/v1/ready` to return OK. 3. Extract sample data (snippet below) — idempotent, safe to re-run. 4. Run the bundled script in [Run Script](#run-script). 5. Report final metrics + UI URL for manual inspection. 6. VGGT refinement is attempted by default when the project reports `vggt_state: READY`; otherwise the script explains that VGGT setup is optional and can be enabled later for refinement.

**"test sample dataset" (MS already running):**

1. Detect backend: scan ports 8000–8009 for a `/v1/ready` response. 2. If none → point to the setup skill. 3. Extract sample data if not already cached. 4. Run the bundled script. 5. Report metrics.

Detect Running Backend

MS_PORT=""
for port in {8000..8009}; do
  if curl -s "http://localhost:$port/v1/ready" | grep -q '"code":0'; then
    MS_PORT=$port; break
  fi
done
[ -z "$MS_PORT" ] && { echo "No running backend. Run amc-setup-calibration-stack skill first."; exit 1; }
echo "Backend on port $MS_PORT"

Locate + Extract Sample Data (idempotent)

: "${REPO_ROOT:?set REPO_ROOT to the auto-magic-calib checkout. Run amc-setup-calibration-stack Step 0b first.}"
grep -q "AutoMagicCalib" "$REPO_ROOT/README.md" 2>/dev/null && grep -q "auto-magic-calib-ms" "$REPO_ROOT/compose/ms/compose.yml" 2>/dev/null || { echo "ERROR: REPO_ROOT is not an auto-magic-calib checkout: $REPO_ROOT" >&2; exit 1; }

SAMPLE_ZIP="$REPO_ROOT/assets/sdg_08_2_sample_data_010926.zip"
[ -f "$SAMPLE_ZIP" ] || { echo "Sample zip not found at $SAMPLE_ZIP"; exit 1; }

# Cache directory next to the zip.
SAMPLE_DIR="$(dirname "$SAMPLE_ZIP")/.cache/sdg_08_2_sample_data_010926"

if [ ! -d "$SAMPLE_DIR" ]; then
  mkdir -p "$SAMPLE_DIR"
  unzip -q "$SAMPLE_ZIP" -d "$SAMPLE_DIR"
fi
ls "$SAMPLE_DIR"
# Expected (possibly inside a wrapper folder): alignment_data/  GT.zip  videos/

Run Script

Run the bundled script from the `amc-run-sample-calibration` skill package, not from the `auto-magic-calib` repo root. If the user points the agent at this skill folder directly instead of installing it, set `AMC_SAMPLE_SKILL_DIR` to the directory containing this `SKILL.md`, or run the command from that directory. Set `REPO_ROOT` to the AutoMagicCalib checkout resolved by `amc-setup-calibration-stack`; the script reads `compose/.env` from that checkout for the backend port, accepts `BASE_URL`, `MS_PORT`, `SAMPLE_DIR`, and `RUN_VGGT` overrides, creates a fresh project each run, attempts VGGT when ready, and prints the NGC warehouse dataset note at the end.

# REPO_ROOT must point to the auto-magic-calib checkout, not the DeepStream repo.
: "${REPO_ROOT:?set REPO_ROOT to the auto-magic-calib checkout. Run amc-setup-calibration-stack Step 0b first.}"
grep -q "AutoMagicCalib" "$REPO_ROOT/README.md" 2>/dev/null && grep -q "auto-magic-calib-ms" "$REPO_ROOT/compose/ms/compose.yml" 2>/dev/null || { echo "ERROR: REPO_ROOT is not an auto-magic-calib checkout: $REPO_ROOT" >&2; exit 1; }

# If AMC was resolved from DeepStream's tools/auto-magic-calib submodule,
# derive the DeepStream root so the unpacked repo skill can be used directly.
if [ -z "${DEEPSTREAM_REPO_ROOT:-}" ] && [ -d "$REPO_ROOT/../../skills/amc-run-sampl