Add certificate receipt support

Author: romgenie

.env.example

@@ -0,0 +1,12 @@
+CT_CERT_RECEIPT_API_URL=https://cert.complete.tech/api/skill-runs
+CT_CERT_CLASS_ID=cls_agentic_invoice_skill
+CT_CERT_SESSION_ID=ses_YYYYMMDD_agentic_invoice_skill
+CT_CERT_COMPLETION_KEY=replace-with-shared-class-key
+CT_CERT_COMPLETION_KEY_ENV=CT_CERT_COMPLETION_KEY
+CT_CERT_SKILL_ID=agentic-invoice-skill
+CT_CERT_SKILL_VERSION=1.0.0
+
+# Optional profile variables for --registry-profile agentic_invoice_skill
+CT_CERT_AGENTIC_INVOICE_SKILL_CLASS_ID=cls_agentic_invoice_skill
+CT_CERT_AGENTIC_INVOICE_SKILL_SESSION_ID=ses_YYYYMMDD_agentic_invoice_skill
+CT_CERT_AGENTIC_INVOICE_SKILL_COMPLETION_KEY=replace-with-shared-class-key

README.md

@@ -110,3 +110,30 @@ Use clear, specific, auditable line items. Separate professional services, pass-
 ## License
 
 Code, templates, and documentation are licensed under the MIT License. CompleteTech LLC names, logos, seals, and brand assets are reserved and are not licensed for reuse except to identify this project. See `LICENSE` and `BRAND_ASSETS.md`.
+
+## Certificate Receipts
+
+This skill can run normally without a classroom key. For certificate credit, run the skill workflow first, then request a one-time receipt from `cert.complete.tech`:
+
+```bash
+python scripts/request_receipt.py \
+  --class-id "cls_agentic_invoice_skill" \
+  --session-id "ses_YYYYMMDD_agentic_invoice_skill" \
+  --completion-key "$CT_CERT_COMPLETION_KEY"
+```
+
+The helper sends `class_id`, `session_id`, `completion_key`, `skill_id`, `skill_version`, a generated `run_id`, optional artifact hash, and metadata to `https://cert.complete.tech/api/skill-runs`. It prints the receipt code and writes a receipt JSON file. Students use the receipt code at `https://cert.complete.tech/claim`. Do not commit real completion keys.
+
+If the skill produced a file, include it so the receipt records an artifact hash:
+
+```bash
+python scripts/request_receipt.py --artifact output/example.pdf
+```
+
+### Receipt Tests
+
+```bash
+python tests/test_receipt_cli.py
+```
+
+The test uses a local fake receipt API and does not require live keys or the live `cert.complete.tech` endpoint.

SKILL.md

@@ -126,3 +126,11 @@ python3 scripts/render_invoice.py --template milestone-invoice \
 - `--no-pdf` emits Markdown only (the original behavior); `--no-cover` drops the cover page.
 - Already drafted the Markdown yourself? Render it directly: `python3 scripts/render_pdf.py --markdown artifact.md --out artifact.pdf --logo assets/logo.png --title "..."`.
 - The PDF supports a Markdown subset: `#`/`##`/`###` headings, paragraphs, `-` bullets, tables, `>` callouts, `**bold**`, and `[PAGE_BREAK]`. PDF requires `reportlab`; the optional `--png` preview requires `pypdfium2` and `pillow`. See `assets/examples/` for a rendered example.
+
+## Certificate Receipt Guidance
+
+The skill remains usable without a classroom key. When certificate credit is needed, use `scripts/request_receipt.py` after the skill run. The shared class key is provided through `CT_CERT_COMPLETION_KEY`, `--completion-key`, or a registry profile; the website claim form receives only the generated receipt code.
+
+Receipt requests include this skill ID: `agentic-invoice-skill`. The helper sends class/session IDs, the shared key, skill version, generated run ID, optional artifact hash, and metadata to `https://cert.complete.tech/api/skill-runs`. The student claims the certificate at `https://cert.complete.tech/claim` with the returned receipt.
+
+Do not print, store, or commit real classroom completion keys.

scripts/request_receipt.py

@@ -0,0 +1,219 @@
+#!/usr/bin/env python3
+"""Request a CompleteTech certificate receipt for a skill run.
+
+This helper is intentionally self-contained so each skill repository can carry
+the same classroom receipt workflow without depending on a shared package.
+"""
+
+from __future__ import annotations
+
+import argparse
+import hashlib
+import json
+import os
+import re
+import uuid
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Any, Optional
+from urllib import error, request
+
+ROOT = Path(__file__).resolve().parents[1]
+DEFAULT_RECEIPT_API_URL = "https://cert.complete.tech/api/skill-runs"
+
+
+def load_env_file(path: Path) -> None:
+    if not path.is_file():
+        return
+    for raw_line in path.read_text(encoding="utf-8").splitlines():
+        line = raw_line.strip()
+        if not line or line.startswith("#") or "=" not in line:
+            continue
+        key, value = line.split("=", 1)
+        key = key.strip()
+        value = value.strip()
+        if not key or key in os.environ:
+            continue
+        if len(value) >= 2 and value[0] == value[-1] and value[0] in "\"'":
+            value = value[1:-1]
+        os.environ[key] = value
+
+
+def first_present(*values: Optional[str]) -> str:
+    for value in values:
+        if value is not None and value.strip():
+            return value.strip()
+    return ""
+
+
+def env_profile_prefix(profile: str) -> str:
+    normalized = re.sub(r"[^A-Za-z0-9]+", "_", profile).strip("_").upper()
+    return f"CT_CERT_{normalized}"
+
+
+def skill_metadata() -> tuple[str, str]:
+    skill_md = ROOT / "SKILL.md"
+    text = skill_md.read_text(encoding="utf-8") if skill_md.exists() else ""
+    name_match = re.search(r"^name:\s*([A-Za-z0-9._-]+)\s*$", text, re.MULTILINE)
+    version_match = re.search(r"^version:\s*([A-Za-z0-9._-]+)\s*$", text, re.MULTILINE)
+    fallback = ROOT.name.replace("_", "-")
+    return (
+        name_match.group(1) if name_match else fallback,
+        version_match.group(1) if version_match else "1.0.0",
+    )
+
+
+def sha256_file(path: Path) -> str:
+    digest = hashlib.sha256()
+    with path.open("rb") as handle:
+        for chunk in iter(lambda: handle.read(1024 * 1024), b""):
+            digest.update(chunk)
+    return "sha256:" + digest.hexdigest()
+
+
+def load_receipts(raw_values: list[str], raw_file: Optional[str]) -> list[str]:
+    receipts = [value.strip() for value in raw_values if value and value.strip()]
+    if not raw_file:
+        return receipts
+    data = json.loads(Path(raw_file).expanduser().read_text(encoding="utf-8"))
+    if isinstance(data, list):
+        receipts.extend(str(value).strip() for value in data if str(value).strip())
+    elif isinstance(data, dict):
+        raw_receipts = data.get("prerequisite_receipts") or data.get("receipts") or []
+        if not isinstance(raw_receipts, list):
+            raise SystemExit("Prerequisite receipt JSON must contain a receipts array.")
+        receipts.extend(str(value).strip() for value in raw_receipts if str(value).strip())
+    else:
+        raise SystemExit("Prerequisite receipt JSON must be an array or object.")
+    return receipts
+
+
+def post_json(api_url: str, payload: dict[str, Any]) -> dict[str, Any]:
+    body = json.dumps(payload).encode("utf-8")
+    req = request.Request(
+        api_url,
+        data=body,
+        headers={
+            "Accept": "application/json",
+            "Content-Type": "application/json",
+            "User-Agent": f"{payload['skill_id']}/receipt-helper",
+        },
+        method="POST",
+    )
+    try:
+        with request.urlopen(req, timeout=30) as response:
+            data = response.read().decode("utf-8")
+    except error.HTTPError as exc:
+        details = exc.read().decode("utf-8", errors="replace")
+        raise RuntimeError(f"Receipt API rejected the request with HTTP {exc.code}: {details}") from exc
+    except error.URLError as exc:
+        raise RuntimeError(f"Receipt API request failed: {exc.reason}") from exc
+    decoded = json.loads(data)
+    if not isinstance(decoded, dict) or decoded.get("ok") is not True:
+        raise RuntimeError(f"Receipt API returned an unsuccessful response: {decoded!r}")
+    return decoded
+
+
+def parse_args() -> argparse.Namespace:
+    default_skill_id, default_skill_version = skill_metadata()
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--receipt-api-url", default=None)
+    parser.add_argument("--registry-profile", default=None)
+    parser.add_argument("--class-id", default=None)
+    parser.add_argument("--session-id", default=None)
+    parser.add_argument("--completion-key", default=None)
+    parser.add_argument("--completion-key-env", default=None)
+    parser.add_argument("--skill-id", default=None)
+    parser.add_argument("--skill-version", default=None)
+    parser.add_argument("--run-id", default=None)
+    parser.add_argument("--artifact", default=None, help="Optional output artifact path to hash.")
+    parser.add_argument("--artifact-hash", default=None)
+    parser.add_argument("--metadata", action="append", default=[], help="Metadata as key=value.")
+    parser.add_argument("--receipt-out", default=None, help="Receipt JSON output path.")
+    parser.add_argument("--prerequisite-receipt", action="append", default=[])
+    parser.add_argument("--prerequisite-receipts-file", default=None)
+    parser.set_defaults(default_skill_id=default_skill_id, default_skill_version=default_skill_version)
+    return parser.parse_args()
+
+
+def main() -> int:
+    args = parse_args()
+    load_env_file(ROOT / ".env")
+    load_env_file(ROOT / ".env.local")
+
+    profile: dict[str, str] = {}
+    if args.registry_profile:
+        prefix = env_profile_prefix(args.registry_profile)
+        profile = {
+            "class_id": os.environ.get(f"{prefix}_CLASS_ID", ""),
+            "session_id": os.environ.get(f"{prefix}_SESSION_ID", ""),
+            "completion_key": os.environ.get(f"{prefix}_COMPLETION_KEY", ""),
+        }
+
+    key_env = first_present(args.completion_key_env, os.environ.get("CT_CERT_COMPLETION_KEY_ENV"), "CT_CERT_COMPLETION_KEY")
+    artifact_hash = first_present(args.artifact_hash)
+    if not artifact_hash and args.artifact:
+        artifact_hash = sha256_file(Path(args.artifact).expanduser())
+
+    metadata: dict[str, str] = {
+        "requested_at": datetime.now(timezone.utc).isoformat(timespec="seconds"),
+        "repository": ROOT.name,
+    }
+    if args.artifact:
+        metadata["artifact"] = Path(args.artifact).expanduser().name
+    for entry in args.metadata:
+        if "=" not in entry:
+            raise SystemExit(f"--metadata must be key=value, got: {entry}")
+        key, value = entry.split("=", 1)
+        metadata[key.strip()] = value.strip()
+
+    payload: dict[str, Any] = {
+        "class_id": first_present(args.class_id, profile.get("class_id"), os.environ.get("CT_CERT_CLASS_ID")),
+        "session_id": first_present(args.session_id, profile.get("session_id"), os.environ.get("CT_CERT_SESSION_ID")),
+        "completion_key": first_present(args.completion_key, profile.get("completion_key"), os.environ.get(key_env)),
+        "skill_id": first_present(args.skill_id, os.environ.get("CT_CERT_SKILL_ID"), args.default_skill_id),
+        "skill_version": first_present(args.skill_version, os.environ.get("CT_CERT_SKILL_VERSION"), args.default_skill_version),
+        "run_id": first_present(args.run_id, str(uuid.uuid4())),
+        "metadata": metadata,
+    }
+    if artifact_hash:
+        payload["artifact_hash"] = artifact_hash
+    prerequisite_receipts = load_receipts(args.prerequisite_receipt, args.prerequisite_receipts_file)
+    if prerequisite_receipts:
+        payload["prerequisite_receipts"] = prerequisite_receipts
+
+    missing = [key for key in ("class_id", "session_id", "completion_key", "skill_id", "run_id") if not payload[key]]
+    if missing:
+        raise SystemExit(f"Missing receipt field(s): {', '.join(missing)}")
+
+    api_url = first_present(args.receipt_api_url, os.environ.get("CT_CERT_RECEIPT_API_URL"), DEFAULT_RECEIPT_API_URL)
+    receipt = post_json(api_url, payload)
+    record = {
+        "receipt_code": str(receipt["receipt_code"]),
+        "claim_url": str(receipt["claim_url"]),
+        "expires_at": str(receipt["expires_at"]),
+        "class_id": payload["class_id"],
+        "session_id": payload["session_id"],
+        "skill_id": payload["skill_id"],
+        "skill_version": payload["skill_version"],
+        "run_id": str(receipt.get("run_id") or payload["run_id"]),
+        "artifact_hash": artifact_hash,
+        "prerequisite_receipts_count": len(prerequisite_receipts),
+    }
+
+    receipt_out = Path(args.receipt_out).expanduser() if args.receipt_out else ROOT / "output" / f"{record['run_id']}.receipt.json"
+    receipt_out.parent.mkdir(parents=True, exist_ok=True)
+    receipt_out.write_text(json.dumps(record, indent=2, sort_keys=True) + "\n", encoding="utf-8")
+
+    print(f"Receipt Code: {record['receipt_code']}")
+    print(f"Claim URL: {record['claim_url']}")
+    print(f"Receipt JSON: {receipt_out}")
+    return 0
+
+
+if __name__ == "__main__":
+    try:
+        raise SystemExit(main())
+    except RuntimeError as exc:
+        print(f"Error: {exc}")
+        raise SystemExit(1)