{ "about": "Tessera's own records of run 20261031T065341Z, read back at the end of the run. Each section below is copied unchanged from the run's final-readback.json. The sections named in left_out are not needed to check the replay.", "source": { "file": "final-readback.json", "sha256": "f6e33d1849211345a4d8bec0634bbf7d41da3c6d3908af0b720f841efe170bca", "bytes": 121559 }, "left_out": [ "audit", "counts", "requester_view" ], "sections": { "request": { "namespace": "main", "task_id": "t_f05e739efc644796a94b27c7d9fac0be", "queue": "eq01", "parent_id": null, "state": "ready", "kind": "request", "effect_class": "write-internal", "priority": 50, "brief": { "acceptance_checks": [ "the kit's own tests pass", "every coverage rule holds on the synthetic CSV" ], "coverage_rules": [ "Shifts are Mon, Tue, Wed, Thu, Fri and Sat, each with an AM and a PM slot: 12 shifts, written Day-Slot (for example Mon-AM).", "Every shift has at least 2 volunteers.", "Every shift has at least 1 volunteer whose role is lead.", "A volunteer works only shifts listed in their available column.", "No volunteer works more shifts in the week than their max_shifts.", "No volunteer works both the AM and the PM shift on the same day." ], "deadline": "2026-11-01T00:00:00Z", "inputs": { "availability_csv": "volunteer_id,display_name,role,max_shifts,available\nV01,Volunteer 01,lead,3,Mon-PM;Tue-PM;Thu-AM;Thu-PM;Fri-AM\nV02,Volunteer 02,lead,3,Wed-AM;Wed-PM;Thu-PM;Sat-AM\nV03,Volunteer 03,lead,3,Mon-AM;Mon-PM;Tue-AM;Wed-PM;Fri-AM\nV04,Volunteer 04,lead,3,Mon-AM;Mon-PM;Wed-PM;Thu-PM;Sat-PM\nV05,Volunteer 05,lead,3,Tue-AM;Tue-PM;Fri-PM\nV06,Volunteer 06,general,2,Mon-AM;Fri-AM\nV07,Volunteer 07,general,2,Thu-AM;Thu-PM;Fri-AM\nV08,Volunteer 08,general,2,Mon-AM;Tue-AM;Fri-AM;Sat-AM\nV09,Volunteer 09,general,2,Tue-AM;Wed-PM;Fri-PM;Sat-AM\nV10,Volunteer 10,general,2,Mon-AM;Mon-PM\nV11,Volunteer 11,general,2,Wed-AM;Thu-AM;Fri-PM\nV12,Volunteer 12,general,2,Tue-PM;Thu-AM\nV13,Volunteer 13,general,2,Mon-PM;Thu-AM;Sat-PM\nV14,Volunteer 14,general,2,Mon-AM;Tue-AM;Wed-AM;Thu-AM\n", "format": "volunteer_id,display_name,role,max_shifts,available; available lists Day-Slot shifts separated by semicolons" }, "organization_type": "Food pantry", "synthetic": true, "text": "We are a small food pantry (a synthetic example). Each week our volunteers tell us when they can come in. Please build us a small kit that turns our volunteer availability CSV into a weekly shift schedule that meets our coverage rules, with tests and a README, so our own agent or staff can run it. Use only the synthetic data provided.", "title": "SYNTHETIC: weekly volunteer shift schedule kit" }, "attempts": 1, "failures": 0, "fencing_token": 1, "not_before": 1793429904.78, "pending_children": 0, "created_at": 1793429623.574, "updated_at": 1793429904.78, "wait_reason": null, "pending_deps": 0, "depends_on": [], "wake_at": null, "parked_by": null, "parks": 0, "idempotency_key": null, "producer_surface": "surface:tessera", "visibility_scope": "allowlist_surfaces", "allowed_surfaces": [ "surface:eranos" ], "target_cohorts": [ "all" ], "tags": [ "origin:requester", "untrusted:true", "kind:request" ], "owner_key_id": "k_f617cd3167ed" }, "request_results": { "results": [] }, "request_executions": { "executions": [], "next_after": null }, "request_execution_records": [], "build": { "namespace": "main", "task_id": "t_06e3ef2acaa54c7297b5c0dfca3e2c70", "queue": "eq02", "parent_id": "t_f05e739efc644796a94b27c7d9fac0be", "state": "done", "kind": "build", "effect_class": "write-internal", "priority": 50, "brief": { "acceptance": [ { "id": "tests", "pass_when": "exit code 0", "run": "python3 -m unittest discover -s tests -v" }, { "id": "coverage", "pass_when": "exit code 0 and 0 violations reported", "run": "python3 shift_scheduler.py data/availability.csv" } ], "constraints": [ "Python 3 standard library only; no installs and no network", "synthetic data only; no real names or contact details", "deterministic: the same input gives the same schedule" ], "coverage_rules": [ "Shifts are Mon, Tue, Wed, Thu, Fri and Sat, each with an AM and a PM slot: 12 shifts, written Day-Slot (for example Mon-AM).", "Every shift has at least 2 volunteers.", "Every shift has at least 1 volunteer whose role is lead.", "A volunteer works only shifts listed in their available column.", "No volunteer works more shifts in the week than their max_shifts.", "No volunteer works both the AM and the PM shift on the same day." ], "deadline": "2026-11-01T00:00:00Z", "deliverables": { "README.md": "What the kit does, the input format, the coverage rules, how to run it, how to run the tests, and that it was built and tested on synthetic data only.", "data/availability.csv": "The input noun, saved unchanged.", "shift_scheduler.py": "Python 3 standard library only. 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the PM shift on the same day." ], "input_noun": { "key": "availability-20261031t065341z", "sha256": "6709f71fb10238ebe4ce06c987937b1ba5301646be9b5bd474f1a4844089f795", "store": "kit.inputs", "version": 1 }, "kit_id": "kit-volunteer-shifts-20261031t065341z", "nouns": { "keys": { "README.md": "docs.README.md", "data/availability.csv": "data.availability.csv", "shift_scheduler.py": "code.shift_scheduler.py", "tests/test_shift_scheduler.py": "tests.test_shift_scheduler.py" }, "store": "kit.volunteer-shifts" }, "output_contract": { "approved": "", "checks": { "coverage_exit_code": "", "coverage_violations": "", "digests_match": "", "tests_exit_code": "", "tests_run": "" }, "draft_sha256": "", "draft_task_id": "", "drafter_key_id": "", "kit_id": "kit-volunteer-shifts-20261031t065341z", "reasons": [ "" ], "review_task_id": "", "reviewer_key_id": "k_b514f2a59964", "verdict": "" }, "part": 1, "request_id": "t_f05e739efc644796a94b27c7d9fac0be", "review_noun": { "expected_version": 0, "key": "kit-volunteer-shifts-20261031t065341z", "store": "kit.reviews", "value": "the same object you submit as output", "visibility_scope": "surface_only" }, "reviewer_key_id": "k_b514f2a59964", "synthetic": true, "title": "SYNTHETIC: independent review of the weekly volunteer shift schedule kit", "what_you_review": "The build verb this review depends on: dependencies[0] in your claim response (task_id, output, receipt_hash, completed_by_key)." }, "dependencies_and_children": [ { "output": "{\"blob_sha256\": \"a30b48b17ba2a20c60a3fdabcb67874760e96c4215d58ed4141288d763f5d34e\", \"draft\": {\"files\": {\"README.md\": {\"key\": \"docs.README.md\", \"sha256\": \"faa26f17fdde72804043644e45ad7684b23211a8bae724530834e189649099cb\", \"version\": 1}, \"data/availability.csv\": {\"key\": \"data.availability.csv\", \"sha256\": \"6709f71fb10238ebe4ce06c987937b1ba5301646be9b5bd474f1a4844089f795\", \"version\": 1}, \"shift_scheduler.py\": {\"key\": \"code.shift_scheduler.py\", \"sha256\": 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"{\"approved\": true, \"checks\": {\"coverage_exit_code\": 0, \"coverage_violations\": 0, \"digests_match\": true, \"tests_exit_code\": 0, \"tests_run\": 8}, \"draft_sha256\": \"a30b48b17ba2a20c60a3fdabcb67874760e96c4215d58ed4141288d763f5d34e\", \"draft_task_id\": \"t_06e3ef2acaa54c7297b5c0dfca3e2c70\", \"drafter_key_id\": \"k_cc60da07d74a\", \"kit_id\": \"kit-volunteer-shifts-20261031t065341z\", \"reasons\": [\"all 4 file sha256 and blob_sha256 match build output\", \"8 unit tests pass, exit 0\", \"scheduler CLI exits 0 with 0 violations on synthetic CSV\", \"code enforces and tests exercise all 6 coverage rules; README covers input, rules, running, testing and synthetic-data note\"], \"review_task_id\": \"t_cc69cdcb8fa3404dbf37eb4d38c684b5\", \"reviewer_key_id\": \"k_b514f2a59964\", \"verdict\": \"approve\"}", "error": null } ], "nouns:kit.inputs": { "records": [ { "namespace": "main", "store": "kit.inputs", "key": "availability-20261031t065341z", "version": 1, "value": { "csv": "volunteer_id,display_name,role,max_shifts,available\nV01,Volunteer 01,lead,3,Mon-PM;Tue-PM;Thu-AM;Thu-PM;Fri-AM\nV02,Volunteer 02,lead,3,Wed-AM;Wed-PM;Thu-PM;Sat-AM\nV03,Volunteer 03,lead,3,Mon-AM;Mon-PM;Tue-AM;Wed-PM;Fri-AM\nV04,Volunteer 04,lead,3,Mon-AM;Mon-PM;Wed-PM;Thu-PM;Sat-PM\nV05,Volunteer 05,lead,3,Tue-AM;Tue-PM;Fri-PM\nV06,Volunteer 06,general,2,Mon-AM;Fri-AM\nV07,Volunteer 07,general,2,Thu-AM;Thu-PM;Fri-AM\nV08,Volunteer 08,general,2,Mon-AM;Tue-AM;Fri-AM;Sat-AM\nV09,Volunteer 09,general,2,Tue-AM;Wed-PM;Fri-PM;Sat-AM\nV10,Volunteer 10,general,2,Mon-AM;Mon-PM\nV11,Volunteer 11,general,2,Wed-AM;Thu-AM;Fri-PM\nV12,Volunteer 12,general,2,Tue-PM;Thu-AM\nV13,Volunteer 13,general,2,Mon-PM;Thu-AM;Sat-PM\nV14,Volunteer 14,general,2,Mon-AM;Tue-AM;Wed-AM;Thu-AM\n", "format": "volunteer_id,display_name,role,max_shifts,available; available lists Day-Slot shifts separated by semicolons", "request_id": "t_f05e739efc644796a94b27c7d9fac0be", "sha256": "6709f71fb10238ebe4ce06c987937b1ba5301646be9b5bd474f1a4844089f795", "synthetic": true }, "created_at": 1793429623.598, "producer_surface": "surface:eranos", "visibility_scope": "surface_only", "allowed_surfaces": [], "target_cohorts": [ "all" ], "tags": [], "owner_key_id": "k_054b985efbe7" } ] }, "nouns:kit.volunteer-shifts": { "records": [ { "namespace": "main", "store": "kit.volunteer-shifts", "key": "code.shift_scheduler.py", "version": 1, "value": "{\"content\": \"\\\"\\\"\\\"Weekly volunteer shift scheduler (synthetic data only).\\n\\nReads a volunteer availability CSV, builds a weekly schedule that meets\\nevery coverage rule using deterministic backtracking search, and writes\\nthe schedule as CSV with columns shift,volunteer_id,display_name,role.\\n\\\"\\\"\\\"\\n\\nimport argparse\\nimport csv\\nimport itertools\\nimport sys\\n\\nDAYS = [\\\"Mon\\\", \\\"Tue\\\", \\\"Wed\\\", \\\"Thu\\\", \\\"Fri\\\", \\\"Sat\\\"]\\nSLOTS = [\\\"AM\\\", \\\"PM\\\"]\\nSHIFTS = [d + \\\"-\\\" + s for d in DAYS for s in SLOTS]\\n\\nSCHEDULE_FIELDS = [\\\"shift\\\", \\\"volunteer_id\\\", \\\"display_name\\\", \\\"role\\\"]\\n\\n\\ndef load_volunteers(path):\\n \\\"\\\"\\\"Read the availability CSV into a list of volunteer dicts.\\\"\\\"\\\"\\n volunteers = []\\n with open(path, newline=\\\"\\\", encoding=\\\"utf-8\\\") as fh:\\n reader = csv.DictReader(fh)\\n for row in reader:\\n available = set()\\n raw = (row.get(\\\"available\\\") or \\\"\\\").strip()\\n if raw:\\n for part in raw.split(\\\";\\\"):\\n part = part.strip()\\n if part:\\n available.add(part)\\n volunteers.append(\\n {\\n \\\"volunteer_id\\\": (row.get(\\\"volunteer_id\\\") or \\\"\\\").strip(),\\n \\\"display_name\\\": (row.get(\\\"display_name\\\") or \\\"\\\").strip(),\\n \\\"role\\\": (row.get(\\\"role\\\") or \\\"\\\").strip(),\\n \\\"max_shifts\\\": int((row.get(\\\"max_shifts\\\") or \\\"0\\\").strip()),\\n \\\"available\\\": available,\\n }\\n )\\n volunteers.sort(key=lambda v: v[\\\"volunteer_id\\\"])\\n return volunteers\\n\\n\\ndef check_coverage(schedule, volunteers):\\n \\\"\\\"\\\"Return a list of violation strings; empty when every rule holds.\\\"\\\"\\\"\\n violations = []\\n by_id = {v[\\\"volunteer_id\\\"]: v for v in volunteers}\\n by_shift = {s: [] for s in SHIFTS}\\n for entry in schedule or []:\\n shift = entry.get(\\\"shift\\\")\\n vid = entry.get(\\\"volunteer_id\\\")\\n if shift not in by_shift:\\n violations.append(\\\"unknown shift: %r\\\" % (shift,))\\n continue\\n if vid not in by_id:\\n violations.append(\\\"unknown volunteer %r on %s\\\" % (vid, shift))\\n continue\\n by_shift[shift].append(vid)\\n\\n for shift in SHIFTS:\\n assigned = by_shift[shift]\\n if len(assigned) < 2:\\n violations.append(\\n \\\"%s has %d volunteer(s); at least 2 required\\\"\\n % (shift, len(assigned))\\n )\\n if not any(\\n by_id[vid][\\\"role\\\"] == \\\"lead\\\" for vid in assigned if vid in by_id\\n ):\\n violations.append(\\\"%s has no lead volunteer\\\" % shift)\\n\\n counts = {}\\n day_of = {}\\n for entry in schedule or []:\\n shift = entry.get(\\\"shift\\\")\\n vid = entry.get(\\\"volunteer_id\\\")\\n if shift not in by_shift or vid not in by_id:\\n continue\\n counts[vid] = counts.get(vid, 0) + 1\\n day = shift.split(\\\"-\\\")[0]\\n day_of.setdefault(vid, []).append((day, shift))\\n if shift not in by_id[vid][\\\"available\\\"]:\\n violations.append(\\n \\\"%s works %s but is not available for it\\\" % (vid, shift)\\n )\\n\\n for vid, n in sorted(counts.items()):\\n if n > by_id[vid][\\\"max_shifts\\\"]:\\n violations.append(\\n \\\"%s works %d shifts; max is %d\\\"\\n % (vid, n, by_id[vid][\\\"max_shifts\\\"])\\n )\\n\\n for vid in sorted(day_of):\\n seen_days = {}\\n for day, shift in day_of[vid]:\\n seen_days.setdefault(day, []).append(shift)\\n for day in sorted(seen_days):\\n if len(seen_days[day]) > 1:\\n violations.append(\\n \\\"%s works both shifts on %s\\\" % (vid, day)\\n )\\n\\n return violations\\n\\n\\ndef build_schedule(volunteers):\\n \\\"\\\"\\\"Build a valid schedule or return None when impossible.\\n\\n Assigns exactly 2 volunteers to each of the 12 shifts using\\n deterministic depth-first backtracking. Shifts are attempted in order\\n of fewest eligible volunteers (ties broken by canonical shift order);\\n candidate pairs are tried in sorted volunteer_id order.\\n \\\"\\\"\\\"\\n by_id = {v[\\\"volunteer_id\\\"]: v for v in volunteers}\\n\\n def eligible(shift):\\n return sorted(\\n vid\\n for vid, v in by_id.items()\\n if shift in v[\\\"available\\\"]\\n )\\n\\n order = sorted(SHIFTS, key=lambda s: (len(eligible(s)), SHIFTS.index(s)))\\n\\n assignment = {}\\n counts = {vid: 0 for vid in by_id}\\n worked_days = {vid: set() for vid in by_id}\\n\\n def candidates_for(shift):\\n day = shift.split(\\\"-\\\")[0]\\n out = []\\n for vid in sorted(by_id):\\n v = by_id[vid]\\n if shift not in v[\\\"available\\\"]:\\n continue\\n if counts[vid] >= v[\\\"max_shifts\\\"]:\\n continue\\n if day in worked_days[vid]:\\n continue\\n out.append(vid)\\n return out\\n\\n def feasible_remaining(pos):\\n # Forward check: every unassigned shift must still be fillable.\\n for j in range(pos, len(order)):\\n shift = order[j]\\n cands = candidates_for(shift)\\n if len(cands) < 2:\\n return False\\n if not any(by_id[c][\\\"role\\\"] == \\\"lead\\\" for c in cands):\\n return False\\n return True\\n\\n def dfs(pos):\\n if pos == len(order):\\n return True\\n shift = order[pos]\\n cands = candidates_for(shift)\\n pairs = [\\n p\\n for p in itertools.combinations(cands, 2)\\n if any(by_id[c][\\\"role\\\"] == \\\"lead\\\" for c in p)\\n ]\\n for a, b in pairs:\\n day = shift.split(\\\"-\\\")[0]\\n assignment[shift] = (a, b)\\n counts[a] += 1\\n counts[b] += 1\\n worked_days[a].add(day)\\n worked_days[b].add(day)\\n if feasible_remaining(pos + 1) and dfs(pos + 1):\\n return True\\n counts[a] -= 1\\n counts[b] -= 1\\n worked_days[a].discard(day)\\n worked_days[b].discard(day)\\n del assignment[shift]\\n return False\\n\\n if not dfs(0):\\n return None\\n\\n schedule = []\\n for shift in SHIFTS:\\n for vid in sorted(assignment[shift]):\\n v = by_id[vid]\\n schedule.append(\\n {\\n \\\"shift\\\": shift,\\n \\\"volunteer_id\\\": vid,\\n \\\"display_name\\\": v[\\\"display_name\\\"],\\n \\\"role\\\": v[\\\"role\\\"],\\n }\\n )\\n return schedule\\n\\n\\ndef write_schedule(schedule, path):\\n with open(path, \\\"w\\\", newline=\\\"\\\", encoding=\\\"utf-8\\\") as fh:\\n writer = csv.DictWriter(fh, fieldnames=SCHEDULE_FIELDS)\\n writer.writeheader()\\n for entry in schedule:\\n writer.writerow({k: entry.get(k, \\\"\\\") for k in SCHEDULE_FIELDS})\\n\\n\\ndef main(argv=None):\\n parser = argparse.ArgumentParser(\\n description=\\\"Build a weekly volunteer shift schedule.\\\"\\n )\\n parser.add_argument(\\\"input\\\", help=\\\"availability CSV path\\\")\\n parser.add_argument(\\n \\\"--out\\\", default=\\\"schedule.csv\\\", help=\\\"output schedule CSV path\\\"\\n )\\n args = parser.parse_args(argv)\\n\\n try:\\n volunteers = load_volunteers(args.input)\\n except (OSError, ValueError) as exc:\\n print(\\\"error: cannot read input: %s\\\" % exc)\\n return 2\\n\\n schedule = build_schedule(volunteers)\\n if schedule is None:\\n print(\\\"error: no valid schedule exists for this input\\\")\\n return 2\\n\\n write_schedule(schedule, args.out)\\n for entry in schedule:\\n print(\\n \\\"%s,%s,%s,%s\\\"\\n % (\\n entry[\\\"shift\\\"],\\n entry[\\\"volunteer_id\\\"],\\n entry[\\\"display_name\\\"],\\n entry[\\\"role\\\"],\\n )\\n )\\n violations = check_coverage(schedule, volunteers)\\n print(\\\"violations: %d\\\" % len(violations))\\n for v in violations:\\n print(\\\"violation: %s\\\" % v)\\n return 0 if not violations else 1\\n\\n\\nif __name__ == \\\"__main__\\\":\\n sys.exit(main())\\n\", \"path\": \"shift_scheduler.py\", \"sha256\": \"b3c4b5867fa3e26b180a5c3185f9de27a13dc096c92a9ea9f4d2f316eef1908b\"}", "created_at": 1793429779.015, "producer_surface": "surface:eranos", "visibility_scope": "surface_only", "allowed_surfaces": [], "target_cohorts": [ "all" ], "tags": [], "owner_key_id": "k_cc60da07d74a" }, { "namespace": "main", "store": "kit.volunteer-shifts", "key": "data.availability.csv", "version": 1, "value": "{\"content\": \"volunteer_id,display_name,role,max_shifts,available\\nV01,Volunteer 01,lead,3,Mon-PM;Tue-PM;Thu-AM;Thu-PM;Fri-AM\\nV02,Volunteer 02,lead,3,Wed-AM;Wed-PM;Thu-PM;Sat-AM\\nV03,Volunteer 03,lead,3,Mon-AM;Mon-PM;Tue-AM;Wed-PM;Fri-AM\\nV04,Volunteer 04,lead,3,Mon-AM;Mon-PM;Wed-PM;Thu-PM;Sat-PM\\nV05,Volunteer 05,lead,3,Tue-AM;Tue-PM;Fri-PM\\nV06,Volunteer 06,general,2,Mon-AM;Fri-AM\\nV07,Volunteer 07,general,2,Thu-AM;Thu-PM;Fri-AM\\nV08,Volunteer 08,general,2,Mon-AM;Tue-AM;Fri-AM;Sat-AM\\nV09,Volunteer 09,general,2,Tue-AM;Wed-PM;Fri-PM;Sat-AM\\nV10,Volunteer 10,general,2,Mon-AM;Mon-PM\\nV11,Volunteer 11,general,2,Wed-AM;Thu-AM;Fri-PM\\nV12,Volunteer 12,general,2,Tue-PM;Thu-AM\\nV13,Volunteer 13,general,2,Mon-PM;Thu-AM;Sat-PM\\nV14,Volunteer 14,general,2,Mon-AM;Tue-AM;Wed-AM;Thu-AM\\n\", \"path\": \"data/availability.csv\", \"sha256\": \"6709f71fb10238ebe4ce06c987937b1ba5301646be9b5bd474f1a4844089f795\"}", "created_at": 1793429765.598, "producer_surface": "surface:eranos", "visibility_scope": "surface_only", "allowed_surfaces": [], "target_cohorts": [ "all" ], "tags": [], "owner_key_id": "k_cc60da07d74a" }, { "namespace": "main", "store": "kit.volunteer-shifts", "key": "docs.README.md", "version": 1, "value": "{\"content\": \"# Volunteer Shift Schedule Kit (synthetic data only)\\n\\nSmall kit for a fictional food pantry example. It turns a volunteer\\navailability CSV into a weekly shift schedule that meets the coverage\\nrules below. Everything here was built and tested on **synthetic data\\nonly** — all names are placeholders like \\\"Volunteer 01\\\". No real names\\nor contact details are used anywhere.\\n\\n## What the kit does\\n\\n`shift_scheduler.py` (Python 3 standard library only) reads the\\navailability CSV, searches for a weekly assignment with deterministic\\nbacktracking search, writes the schedule as CSV, and checks it against\\nevery coverage rule.\\n\\n## Input format\\n\\n`data/availability.csv` has columns:\\n\\n- `volunteer_id` — e.g. `V01`\\n- `display_name` — placeholder name, e.g. `Volunteer 01`\\n- `role` — `lead` or `general`\\n- `max_shifts` — most shifts this volunteer works in the week\\n- `available` — shifts separated by `;`, each written `Day-Slot`\\n (e.g. `Mon-PM;Tue-PM;Thu-AM`)\\n\\n## Coverage rules\\n\\n- Shifts are Mon, Tue, Wed, Thu, Fri and Sat, each with an AM and a PM\\n slot: 12 shifts, written `Day-Slot` (for example `Mon-AM`).\\n- Every shift has at least 2 volunteers.\\n- Every shift has at least 1 volunteer whose role is `lead`.\\n- A volunteer works only shifts listed in their `available` column.\\n- No volunteer works more shifts in the week than their `max_shifts`.\\n- No volunteer works both the AM and the PM shift on the same day.\\n\\n## How to run it\\n\\n```sh\\npython3 shift_scheduler.py data/availability.csv\\npython3 shift_scheduler.py data/availability.csv --out schedule.csv\\n```\\n\\nThe program prints the schedule and the number of violations. It exits\\n`0` only when there are no violations, and exits `2` with a clear\\nmessage when no valid schedule exists. Output CSV columns are\\n`shift,volunteer_id,display_name,role`.\\n\\n`check_coverage(schedule, volunteers)` is importable from\\n`shift_scheduler` and returns a list of violation strings (empty when\\nevery rule holds).\\n\\n## How to run the tests\\n\\n```sh\\npython3 -m unittest discover -s tests -v\\n```\\n\\nThe tests cover: the synthetic CSV yields a schedule with zero\\nviolations; `check_coverage` reports each broken rule (unavailable\\nvolunteer, over `max_shifts`, no lead, both shifts on one day, fewer\\nthan 2 people); and an impossible input is reported, not silently\\nscheduled.\\n\", \"path\": \"README.md\", \"sha256\": \"faa26f17fdde72804043644e45ad7684b23211a8bae724530834e189649099cb\"}", "created_at": 1793429758.27, "producer_surface": "surface:eranos", "visibility_scope": "surface_only", "allowed_surfaces": [], "target_cohorts": [ "all" ], "tags": [], "owner_key_id": "k_cc60da07d74a" }, { "namespace": "main", "store": "kit.volunteer-shifts", "key": "tests.test_shift_scheduler.py", "version": 1, "value": "{\"content\": \"\\\"\\\"\\\"unittest tests for shift_scheduler (synthetic data only).\\\"\\\"\\\"\\n\\nimport csv\\nimport os\\nimport subprocess\\nimport sys\\nimport tempfile\\nimport unittest\\n\\nsys.path.insert(0, os.path.join(os.path.dirname(__file__), \\\"..\\\"))\\n\\nfrom shift_scheduler import ( # noqa: E402\\n SHIFTS,\\n build_schedule,\\n check_coverage,\\n load_volunteers,\\n)\\n\\nDATA_CSV = os.path.join(os.path.dirname(__file__), \\\"..\\\", \\\"data\\\",\\n \\\"availability.csv\\\")\\n\\n\\ndef make_volunteers():\\n return [\\n {\\\"volunteer_id\\\": \\\"L1\\\", \\\"display_name\\\": \\\"Lead One\\\", \\\"role\\\": \\\"lead\\\",\\n \\\"max_shifts\\\": 6, \\\"available\\\": set(SHIFTS)},\\n {\\\"volunteer_id\\\": \\\"L2\\\", \\\"display_name\\\": \\\"Lead Two\\\", \\\"role\\\": \\\"lead\\\",\\n \\\"max_shifts\\\": 6, \\\"available\\\": set(SHIFTS)},\\n {\\\"volunteer_id\\\": \\\"G1\\\", \\\"display_name\\\": \\\"Gen One\\\", \\\"role\\\": \\\"general\\\",\\n \\\"max_shifts\\\": 6, \\\"available\\\": set(SHIFTS)},\\n {\\\"volunteer_id\\\": \\\"G2\\\", \\\"display_name\\\": \\\"Gen Two\\\", \\\"role\\\": \\\"general\\\",\\n \\\"max_shifts\\\": 6, \\\"available\\\": set(SHIFTS)},\\n ]\\n\\n\\ndef full_schedule(volunteers):\\n sched = []\\n for shift in SHIFTS:\\n for v in volunteers:\\n sched.append({\\\"shift\\\": shift, \\\"volunteer_id\\\": v[\\\"volunteer_id\\\"],\\n \\\"display_name\\\": v[\\\"display_name\\\"], \\\"role\\\": v[\\\"role\\\"]})\\n return sched\\n\\n\\nclass TestSyntheticSchedule(unittest.TestCase):\\n def test_synthetic_csv_yields_zero_violations(self):\\n volunteers = load_volunteers(DATA_CSV)\\n schedule = build_schedule(volunteers)\\n self.assertIsNotNone(schedule,\\n \\\"expected a valid schedule for synthetic CSV\\\")\\n self.assertEqual(check_coverage(schedule, volunteers), [])\\n # Deterministic: same input gives same schedule.\\n again = build_schedule(volunteers)\\n self.assertEqual(schedule, again)\\n\\n def test_cli_and_output_csv(self):\\n with tempfile.TemporaryDirectory() as tmp:\\n out = os.path.join(tmp, \\\"schedule.csv\\\")\\n proc = subprocess.run(\\n [sys.executable, \\\"shift_scheduler.py\\\", DATA_CSV,\\n \\\"--out\\\", out],\\n cwd=os.path.join(os.path.dirname(__file__), \\\"..\\\"),\\n capture_output=True, text=True)\\n self.assertEqual(proc.returncode, 0, proc.stdout + proc.stderr)\\n self.assertIn(\\\"violations: 0\\\", proc.stdout)\\n with open(out, newline=\\\"\\\", encoding=\\\"utf-8\\\") as fh:\\n rows = list(csv.DictReader(fh))\\n self.assertEqual(\\n [r for r in rows][:1][0].keys() if rows else set(),\\n {\\\"shift\\\", \\\"volunteer_id\\\", \\\"display_name\\\", \\\"role\\\"})\\n volunteers = load_volunteers(DATA_CSV)\\n self.assertEqual(check_coverage(rows, volunteers), [])\\n\\n\\nclass TestCheckCoverageRules(unittest.TestCase):\\n def test_unavailable_volunteer_reported(self):\\n volunteers = make_volunteers()\\n sched = full_schedule(volunteers)\\n sched[0] = {\\\"shift\\\": \\\"Mon-AM\\\", \\\"volunteer_id\\\": \\\"G1\\\",\\n \\\"display_name\\\": \\\"Gen One\\\", \\\"role\\\": \\\"general\\\"}\\n volunteers[2][\\\"available\\\"] = set(SHIFTS) - {\\\"Mon-AM\\\"}\\n violations = check_coverage(sched, volunteers)\\n self.assertTrue(any(\\\"not available\\\" in v for v in violations),\\n violations)\\n\\n def test_over_max_shifts_reported(self):\\n volunteers = make_volunteers()\\n volunteers[0][\\\"max_shifts\\\"] = 1\\n sched = full_schedule(volunteers)\\n violations = check_coverage(sched, volunteers)\\n self.assertTrue(any(\\\"max\\\" in v for v in violations), violations)\\n\\n def test_no_lead_reported(self):\\n volunteers = make_volunteers()\\n sched = []\\n for shift in SHIFTS:\\n sched.append({\\\"shift\\\": shift, \\\"volunteer_id\\\": \\\"G1\\\",\\n \\\"display_name\\\": \\\"Gen One\\\", \\\"role\\\": \\\"general\\\"})\\n sched.append({\\\"shift\\\": shift, \\\"volunteer_id\\\": \\\"G2\\\",\\n \\\"display_name\\\": \\\"Gen Two\\\", \\\"role\\\": \\\"general\\\"})\\n violations = check_coverage(sched, volunteers)\\n self.assertTrue(any(\\\"lead\\\" in v for v in violations), violations)\\n\\n def test_both_shifts_same_day_reported(self):\\n volunteers = make_volunteers()\\n sched = []\\n for shift in SHIFTS:\\n if shift in (\\\"Mon-AM\\\", \\\"Mon-PM\\\"):\\n sched.append({\\\"shift\\\": shift, \\\"volunteer_id\\\": \\\"L1\\\",\\n \\\"display_name\\\": \\\"Lead One\\\", \\\"role\\\": \\\"lead\\\"})\\n sched.append({\\\"shift\\\": shift, \\\"volunteer_id\\\": \\\"G1\\\",\\n \\\"display_name\\\": \\\"Gen One\\\", \\\"role\\\": \\\"general\\\"})\\n else:\\n sched.append({\\\"shift\\\": shift, \\\"volunteer_id\\\": \\\"L2\\\",\\n \\\"display_name\\\": \\\"Lead Two\\\", \\\"role\\\": \\\"lead\\\"})\\n sched.append({\\\"shift\\\": shift, \\\"volunteer_id\\\": \\\"G2\\\",\\n \\\"display_name\\\": \\\"Gen Two\\\", \\\"role\\\": \\\"general\\\"})\\n violations = check_coverage(sched, volunteers)\\n self.assertTrue(any(\\\"both shifts\\\" in v for v in violations),\\n violations)\\n\\n def test_fewer_than_two_reported(self):\\n volunteers = make_volunteers()\\n sched = [{\\\"shift\\\": \\\"Mon-AM\\\", \\\"volunteer_id\\\": \\\"L1\\\",\\n \\\"display_name\\\": \\\"Lead One\\\", \\\"role\\\": \\\"lead\\\"}]\\n violations = check_coverage(sched, volunteers)\\n self.assertTrue(any(\\\"Mon-AM\\\" in v for v in violations), violations)\\n\\n def test_impossible_input_reported_not_silently_scheduled(self):\\n volunteers = [\\n {\\\"volunteer_id\\\": \\\"L1\\\", \\\"display_name\\\": \\\"Lead One\\\",\\n \\\"role\\\": \\\"lead\\\", \\\"max_shifts\\\": 1, \\\"available\\\": {\\\"Mon-AM\\\"}},\\n ]\\n self.assertIsNone(build_schedule(volunteers))\\n with tempfile.TemporaryDirectory() as tmp:\\n inp = os.path.join(tmp, \\\"impossible.csv\\\")\\n with open(inp, \\\"w\\\", newline=\\\"\\\", encoding=\\\"utf-8\\\") as fh:\\n 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