TayHCode/utc-seconds-cli-20261027

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• Quickstart computes end minus start in whole seconds: Real input produced the expected result: 65

  Source: The result is end minus start.

  Input: 2026-10-27T00:00:00Z 2026-10-27T00:01:05Z

  Expected: 65

  Command: python3 -B utc_delta.py 2026-10-27T00:00:00Z 2026-10-27T00:01:05Z

  Observed: 65

• Reversing the arguments gives a negative result: Real input produced the expected result: -65

  Source: Reversing the arguments prints `-65`; equal timestamps print `0`.

  Input: 2026-10-27T00:01:05Z 2026-10-27T00:00:00Z

  Expected: -65

  Command: python3 -B utc_delta.py 2026-10-27T00:01:05Z 2026-10-27T00:00:00Z

  Observed: -65

• Invalid calendar values exit with code 2: Real input produced the expected result: invalid UTC calendar timestamp

  Source: Invalid format or calendar values exit with code 2 and print an error to stderr.

  Input: 2026-02-30T00:00:00Z 2026-10-27T00:00:00Z

  Expected: exit code 2 with calendar error

  Command: python3 -B utc_delta.py 2026-02-30T00:00:00Z 2026-10-27T00:00:00Z

  Observed: invalid UTC calendar timestamp

Examples

• Verify section: documented unit test suite runs the real CLI: command completed successfully

  Source: README.md Verify

  Input: discover tests -v

  Expected: all tests pass

  Command: python3 -B -m unittest discover -s tests -v

  Observed: test_missing_argument (test_cli.CLITests.test_missing_argument) ... ok test_rejects_malformed_timestamps_in_either_position (test_cli.CLITests.test_rejects_malformed_timestamps_in_either_position) ... ok test_signed_whole_seconds (test_cli.CLITests.test_signed_whole_seconds) ... ok ---------------------------------------------------------------------- Ran 3 tests in 3.872s OK

Local or hosted: local

Compute signed whole seconds between two strict UTC timestamps with utc_delta.py

cd <guest-path> && pwd && ls -la && git status 2>&1 | head -3; cat README.md 2>/dev/null | head -150; id -u; python3 --version
cd <guest-path> && cat utc_delta.py && echo ---- && ls tests .coldpass && echo ---- && python3 -B utc_delta.py 2026-10-27T00:00:00Z 2026-10-27T00:01:05Z; echo "rc=$?"; python3 -B utc_delta.py 2026-10-27T00:01:05Z 2026-10-27T00:00:00Z; echo "rc=$?"; python3 -B utc_delta.py 2026-02-30T00:00:00Z 2026-10-27T00:00:00Z; echo "rc=$?"
cd <guest-path> && python3 -B -m unittest discover -s tests -v 2>&1 | tail -25; echo "rc=${PIPESTATUS[0]}"; ls <guest-path> /inputs 2>&1
cd <guest-path> && cat > probe.json <<'EOF'
{"kind":"cli","argv":["python3","-B","utc_delta.py","2026-10-27T00:00:00Z","2026-10-27T00:01:05Z"],"cwd":"<guest-path>","expected_text":"65"}
EOF
cat > claims.json <<'EOF'
[
{"kind":"claim","claim":"Quickstart computes end minus start in whole seconds","source":"The result is end minus start.","input":"2026-10-27T00:00:00Z 2026-10-27T00:01:05Z","expected":"65","probe_kind":"cli","argv":["python3","-B","utc_delta.py","2026-10-27T00:00:00Z","2026-10-27T00:01:05Z"],"expected_text":"65","cwd":"<guest-path>"},
{"kind":"claim","claim":"Reversing the arguments gives a negative result","source":"Reversing the arguments prints `-65`; equal timestamps print `0`.","input":"2026-10-27T00:01:05Z 2026-10-27T00:00:00Z","expected":"-65","probe_kind":"cli","argv":["python3","-B","utc_delta.py","2026-10-27T00:01:05Z","2026-10-27T00:00:00Z"],"expected_text":"-65","cwd":"<guest-path>"},
{"kind":"claim","claim":"Invalid calendar values exit with code 2","source":"Invalid format or calendar values exit with code 2 and print an error to stderr.","input":"2026-02-30T00:00:00Z 2026-10-27T00:00:00Z","expected":"exit code 2 with calendar error","probe_kind":"cli","argv":["python3","-B","utc_delta.py","2026-02-30T00:00:00Z","2026-10-27T00:00:00Z"],"expected_returncode":2,"expected_text":"invalid UTC calendar timestamp","cwd":"<guest-path>"}
]
EOF
cat > examples.json <<'EOF'
[{"kind":"example","claim":"Verify section: documented unit test suite runs the real CLI","source":"README.md Verify","input":"discover tests -v","expected":"all tests pass","argv":["python3","-B","-m","unittest","discover","-s","tests","-v"],"cwd":"<guest-path>","expected_text":"OK"}]
EOF
cat > cycles.json <<'EOF'
{"detected":false,"reason":"Entry points inspected: README.md, utc_delta.py (single argparse main() run once per invocation), tests/test_cli.py. No scheduler, cron, loop, webhook, --once or --now option exists; the CLI computes one result and exits.","checks":[]}
EOF
for f in probe claims examples cycles; do python3 -I -c 'import json,sys;json.load(open(sys.argv[1]));print("ok",sys.argv[1])' $f.json; done
cd <guest-path> && <env-var>=<guest-path> python3 -I <guest-path> --validate --replay; echo "rc=$?"
cd <guest-path> && cat > report.json <<'EOF'
{"outcome":"working","fault_owner":null,"operation":"Compute signed whole seconds between two strict UTC timestamps with utc_delta.py","operation_scope":"Python 3.12.3 (README requires 3.9+); standard library only; no install, network, browser or credentials needed; CLI only (no server, scheduler or webhook exists)","steps":["python3 -B utc_delta.py 2026-10-27T00:00:00Z 2026-10-27T00:01:05Z  -> 65","python3 -B utc_delta.py 2026-10-27T00:01:05Z 2026-10-27T00:00:00Z  -> -65","python3 -B utc_delta.py 2026-02-30T00:00:00Z 2026-10-27T00:00:00Z  -> exit 2, invalid UTC calendar timestamp","python3 -B -m unittest discover -s tests -v  -> Ran 3 tests, OK"],"deviations":[],"stuck_step":null,"main_blocker":null,"plain_failure":null,"suggested_fix":null}
EOF
python3 -I -c 'import json;print(json.load(open("report.json"))["outcome"])'; cd <guest-path> && <env-var>=<guest-path> python3 -I <guest-path> --validate --replay | python3 -c 'import json,sys; d=json.loads(sys.stdin.read()); print(d["valid"], d["problems"], d["replay"]["status"])'