# Sub-project 24 — Reissue Claims CLI + IG-Correctness Regression Test: Design Spec

**Date:** 2026-07-08
**Status:** Draft, awaiting user sign-off
**Branch:** `sp24-reissue-claims`
**Aesthetic direction:** No new UI (operator-only CLI; the workflow is the on-call page already documented in `docs/RUNBOOK.md`).

## 1. Scope

On 2026-07-08 the operator rebuilt the four dzinesco July-8 837P batches
into 358 single-claim, IG-correct X12 files (zipped at `/home/tyler/dev/cyclone/xxxclaims.zip`)
using a one-shot script at `scripts/reissue_claims.py`. The script solved
an immediate crisis: an Edifabric 999 had rejected the original four
multi-claim files because the serializer was unconditionally emitting the
Loop 2000C patient hierarchy (`HL*3 → PAT*01 → NM1*QC`) when
`SBR02 == "18"` (Self-pay), which is forbidden by X12 005010X222A1.

The serializer default was fixed in `serialize_837.py` (see commit
`ee1a397` on `sp41-inwindow-rebill-pipeline`), but the workflow that
proved the fix — parse + per-claim re-serialize + HCPF-spec filename +
zip — still lives in a script the rest of the cyclone pipeline doesn't
know about. SP24 brings that workflow into the canonical CLI surface as
`cyclone reissue-claims`, behind a regression test that locks in the
IG-correct serializer default forever so a future code change cannot
silently reintroduce the same 999 rejection.

**In scope:**

- A new subpackage `backend/src/cyclone/reissue/` containing the pure
  functions `parse_inputs`, `emit_outputs`, `zip_outputs`, and
  `ig_correctness_check`. No Click imports inside the core module —
  it accepts plain Python types so the CLI is a thin wrapper and the
  functions are unit-testable without `click.testing.CliRunner`.
- A new CLI subcommand `cyclone reissue-claims` registered against
  the existing `@main` Click group in `backend/src/cyclone/cli.py`,
  following the conventions in `cyclone-cli` (long-form flags,
  exit codes 0/1/2, `click.echo(..., err=True)` for errors).
- A new module-level public constant in `serialize_837.py`:
  `PATIENT_LOOP_DEFAULT_INCLUDED = False`, exported in the module's
  `__all__`. The default is read by the IG-correctness guard instead
  of `inspect.signature`-ing a private helper, so a future rename of
  `_build_subscriber_block` cannot silently break the guard.
- A regression test
  `test_serialize_837_patient_loop_default_is_false` in
  `backend/tests/test_serialize_837.py` that asserts the constant is
  `False` and that calling `_build_subscriber_block` with no
  `include_patient_loop` kwarg emits `HL*2 child_count=0` (no `HL*3`).
- Smoke tests under `backend/tests/test_cli_reissue_claims.py` covering
  the help screen, an empty-input path, a happy-path re-issue, and
  the IG-correctness guard firing when the constant is monkeypatched.
- Pure-unit tests under `backend/tests/test_reissue_core.py` covering
  parse_inputs (AppleDouble filter, per-file failure tolerance),
  emit_outputs (HCPF-spec filenames, unique-per-millisecond, sorted
  by claim_id), zip_outputs (round-trip integrity check), and
  ig_correctness_check (fires on mismatch, silent on match).
- A deprecation shim at `scripts/reissue_claims.py` that re-exports
  the new CLI subcommand as a thin wrapper with a WARNING printed at
  import time telling the operator `cyclone reissue-claims` is the
  canonical entry. The shim is removed in a follow-up increment.
- A `docs/RUNBOOK.md` entry under "Operator workflows" pointing at
  the new CLI subcommand with a worked example against the dzinesco
  July-8 billing layout.

**Out of scope:**

- New UI exposure for the reissue workflow. The CLI is the operator's
  on-call surface today; a dashboard widget is a future increment.
- A bulk-ingest pipeline for the reissue path. The operator's flow is
  point-in-time ("rebuild yesterday's 358 files from this batch"),
  not a streaming one. `cyclone bulk-ingest` already handles the
  streaming case for inbound files; the outbound reissue path stays
  explicit.
- The SFTP-upload step. `reissue-claims` writes files to a local
  directory (and optionally zips them). The operator moves the
  resulting zip to Gainwell via their SFTP client per the
  "Manual SFTP mode" posture documented in `docs/RUNBOOK.md`.
- An automatic regeneration of historical files. The four dzinesco
  July-8 batches are the immediate operator concern; running
  `reissue-claims` against older batches is a deliberate operator
  action with the explicit `--input-dir` path.
- Edifabric validation. The original script did not gate through
  Edifabric (the July-8 files were validated by the operator's manual
  999 audit). A follow-up SP wires the SP41 SP40 Edifabric gate into
  the reissue path; this increment keeps the surface minimal.

## 2. Decisions (locked during brainstorming)

1. **Subpackage layout, not a single `cli.py` block.** The other
   cross-cutting workflows (`cyclone.rebill`, `cyclone.submission`,
   `cyclone.bulk_ingest`) follow the `cyclone/<verb>/` layout. Putting
   the reissue logic inside `cli.py` directly — like
   `rebill-from-835` does — would make `cli.py` grow past 2,200 LOC
   (already at 2,054) and force the unit tests to live in the
   CLI-flavored `test_cli_*.py` file. The subpackage layout keeps the
   pure functions unit-testable without Click, matches the rest of the
   codebase, and lets `cli.py` stay a thin registration surface.

2. **Public `PATIENT_LOOP_DEFAULT_INCLUDED` constant, not
   `inspect.signature` introspection.** The original script
   introspected the private `_build_subscriber_block` helper via
   `inspect.signature`, which is fragile against rename / refactor.
   Promoting the default to a named public constant in
   `serialize_837.py` and exporting it in `__all__` gives the guard a
   stable handle that survives any future refactor of the helper.

3. **`cyclone reissue-claims` long-form CLI flags.** `--input-dir`,
   `--output-root`, `--date`, `--pipeline`, `--payer`,
   `--sender-id`, `--receiver-id`, `--submitter-name`,
   `--submitter-contact-name`, `--submitter-contact-email`,
   `--receiver-name`, `--zip-output`, `--no-clean`, `--log-level`.
   Long-form, not positional, so the destructive surface is
   self-documenting. Defaults match the dzinesco canonical sender
   (`11525703`) / receiver (`COMEDASSISTPROG`) so the typical
   invocation is just `cyclone reissue-claims --input-dir <batch>`.

4. **IG-correctness guard fires on every CLI invocation.** Not gated
   behind a `--strict` flag — the constant is part of the canonical
   contract the spec requires. The guard's only job is to fail loud if
   the constant flips to `True` in a future refactor; running it on
   every call is the cheapest possible regression test.

5. **Exit codes 0 / 1 / 2 mirror the existing CLI conventions.**
   `0` = success (all files written, zip optional); `1` = IG-correctness
   guard tripped OR a configuration / unexpected error; `2` =
   parse / validation failure on a file (per-file failures reported
   in stdout, but other files continue; only exits 2 if **zero**
   claims survived).

6. **Deprecation shim, not deletion.** The original
   `scripts/reissue_claims.py` stays as a 1-line shim that prints a
   WARNING at import time and re-exports the new module's `main()`
   function. The shim is removed in a follow-up increment once the
   operator's muscle memory has switched over.

7. **The CLI subcommand does NOT call `cyclone.submission.submit_file`.**
   Reissue is an offline-rebuild workflow; it produces local X12
   files for the operator to inspect / upload manually. Wiring the
   SFTP path would conflate "regenerate clean files" with
   "submit them to Gainwell", and the operator wants the inspection
   step in between.

8. **HCPF-spec filename unchanged.** The canonical
   `cyclone.edi.filenames.build_outbound_filename(sender_id, "837P")`
   produces the file names already in use (`tp11525703-837P-...-1of1.x12`);
   no change to the filename format. Per-claim 1 ms timestamp offsets
   (via `datetime.now(tz=ZoneInfo("America/Denver"))` + per-claim
   `timedelta(milliseconds=i)`) guarantee uniqueness within a batch.

## 3. Threat model

This increment does not change the auth boundary or the network posture.
The threat model is unchanged from SP24 (this spec): the auth boundary
is HTTP (login required, bcrypt + HttpOnly session cookie); the
file-system threat is local-only and handled by SQLCipher at rest and
the macOS Keychain. The CLI subcommand runs against the operator's
local environment only — there is no HTTP surface, no auth gate, no
network call. The IG-correctness guard is a static check against the
serializer's documented default; it does not change the security
posture.

The regression test in `test_serialize_837.py` is structural: it pins
a constant to a specific value. If a future refactor flips the constant
back to `True` (the broken pattern), the test fails, the CLI guard
fires, and the operator sees a clear `REFUSING to run` log line before
any X12 byte is emitted.

## 4. Test impact

Following the `cyclone-tests` conventions:

- **Unit tests (pure-unit):**
  - `backend/tests/test_reissue_core.py` — covers `parse_inputs`
    (AppleDouble metadata filter, per-file failure tolerance, claim
    validation error path), `emit_outputs` (HCPF-spec filename
    format, sorted by `claim_id`, per-claim unique timestamps,
    directory creation), `zip_outputs` (round-trip integrity via
    `testzip()`), and `ig_correctness_check` (fires on mismatch,
    silent on match). Each test uses `tmp_path` + a fixture
    `*.x12` file containing a minimal valid 837P — no prodfiles
    dropped into `fixtures/`.
  - `backend/tests/test_serialize_837.py` — adds
    `test_serialize_837_patient_loop_default_is_false` asserting
    that `serialize_837.PATIENT_LOOP_DEFAULT_INCLUDED is False` and
    that calling `_build_subscriber_block` with no kwargs emits
    `HL*2` with `child_count = 0` (no `HL*3`). This test is the
    long-term regression guard; flipping it should require an
    explicit PR-level discussion.
- **Integration tests (CLI smoke):**
  - `backend/tests/test_cli_reissue_claims.py` — `CliRunner`-based
    smoke tests for `cyclone reissue-claims`. Covers:
    - `--help` exits 0 with the expected long-form flags listed.
    - happy path: a single-file input dir produces the expected
      number of output files under `tmp_path/out`.
    - empty input dir: exits 2 with a clear "no claims found" message.
    - IG-correctness guard: monkeypatches
      `serialize_837.PATIENT_LOOP_DEFAULT_INCLUDED` to `True`, asserts
      the CLI exits 1 with the `REFUSING to run` log line in the
      captured stderr.
- **Fixture additions:** none. The CLI smoke test synthesizes a
  minimal 837P file inline via `parse_837` round-tripping a stub
  `ClaimOutput`. No prodfiles are dropped into `fixtures/`.
- **Frontend tests:** none (no UI in this increment).
- **Live-test smoke:** a canonical end-to-end run against
  `/home/tyler/dev/cyclone/july8billing/` to confirm the CLI produces
  the same 358 files + zip as the original script. The smoke command
  is documented at the top of `/tmp/refactor-cyclone.md`.

## 5. Spec & plan anchors

- **Spec anchor (this file):**
  `docs/superpowers/specs/2026-07-08-cyclone-reissue-claims-design.md`
- **Plan anchor:** `docs/superpowers/plans/2026-07-08-cyclone-reissue-claims.md`
- **Related serializer fix:** commit `ee1a397` on
  `sp41-inwindow-rebill-pipeline` (already merged to `main`),
  which flipped the `_build_subscriber_block.include_patient_loop`
  default from `True` to `False` and updated the docstring.
- **Original operator workflow:** `scripts/reissue_claims.py` (the
  one-shot script this increment supersedes).
- **Edifabric 999 that surfaced the bug:** `/tmp/ig_check.log` (the
  operator's 999 audit reference for the IG rule).

## 6. Acceptance criteria

1. `cyclone reissue-claims --help` exits 0 and lists the long-form
   flags listed in §2 Decision 3.
2. `cyclone reissue-claims --input-dir /home/tyler/dev/cyclone/july8billing --date 2026-07-08 --output-root /tmp/sp24-acceptance-out`
   produces exactly 358 `.x12` files under
   `/tmp/sp24-acceptance-out/2026-07-08/initial/`, plus a
   `_serialize_summary.json` sidecar with one row per file.
3. `cyclone reissue-claims --input-dir ... --zip-output /tmp/sp24-acceptance.zip`
   produces a zip whose `testzip()` returns `None` (integrity OK)
   and which contains exactly 358 entries.
4. The IG-correctness guard exits 1 with the `REFUSING to run` log
   line when the constant is monkeypatched to `True`. Verified by the
   `test_cli_reissue_claims.py` smoke test.
5. `pytest backend/tests/test_reissue_core.py -v` exits 0 with all
   cases passing.
6. `pytest backend/tests/test_cli_reissue_claims.py -v` exits 0 with
   all cases passing.
7. `pytest backend/tests/test_serialize_837.py -v` exits 0 with the
   new `test_serialize_837_patient_loop_default_is_false` case
   passing alongside the existing 56 cases.
8. `pytest` (full backend suite) exits 0; no regressions.
9. The CLI runs without requiring a Keychain entry or DB connection —
   `reissue-claims` is a pure parser + serializer + filesystem
   workflow. This matches the original script's posture.
10. After the merge to `main`, `scripts/reissue_claims.py` is a
    1-line shim that prints a WARNING at import time telling the
    operator `cyclone reissue-claims` is the canonical entry. The
    shim does NOT duplicate the argparse surface.