feat: template-first PO parser with fail-closed gate and Bedrock fallback (#105)
* Add deterministic template parser for WO emails
The workorder-email-processor sends every one of ~22.9k emails/month to
an LLM, but ~93.6% are the plain-text "AMAZON UPDATE WO DETAILS" comment
template and ~6.4% the HTML "AMAZON assign Work Order" template. Parse
those two shapes deterministically, offline, so the AI call is reserved
for the long tail.
The module is pure (no boto3, no network). try_deterministic_parse
classifies by subject, extracts the shared contract fields, and returns
a result ONLY when it passes a strict fail-closed validation gate: exact
contract-key set, subject/id agreement, the literal "Work Order: <id>"
double space, per-type required fields, site-code shape, and a
label-bleed guard so a value that over-ran into the next field fails.
Any miss, drift, or extractor exception yields None so the caller falls
back to the AI extractor -- data is never corrupted, only the fallback
rate rises.
Refs: #23
* Migrate WO processor to Bedrock and fix comment_id collision
Switch the AI path from the Anthropic SDK to bedrock-runtime InvokeModel
on the inference profile us.anthropic.claude-haiku-4-5-20251001-v1:0
(BEDROCK_MODEL_ID env), so parsing no longer needs a provider API key or
Secrets Manager secret. The EXTRACTION_PROMPT and JSON contract are kept
byte-identical, so the AI-fallback output is unchanged. Try the new
deterministic template parser first and only call Bedrock on a
miss/invalid result.
Fix issue #23: the WorkOrderComments range key was
work_order_id#<comment_time>, so two emails on one WO with an identical
or absent comment time collided and overwrote each other. Derive a
12-hex suffix from the S3 object key alone -- deterministic, so an async
retry of the same object is byte-identical (idempotent) while distinct
emails get distinct keys -- and keep wall-clock now() out of the key
(literal 'nocomment' segment when comment_time is absent).
Also emit one CloudWatch EMF line per record (Seahaven/WorkorderIngest
ParseOutcome, dimensioned by ParseMethod/TemplateId) for parse-outcome
observability, replace the deprecated datetime.utcnow() with
datetime.now(timezone.utc), and drop the anthropic dependency.
Refs: #23
* Migrate PO processor to Bedrock
Switch the PO email processor's AI extraction from the Anthropic SDK to
bedrock-runtime InvokeModel on the inference profile
us.anthropic.claude-haiku-4-5-20251001-v1:0 (BEDROCK_MODEL_ID env), so
it no longer needs a provider API key or Secrets Manager secret. PO
parsing stays fully AI -- only the provider changes. The EXTRACTION_PROMPT
is kept byte-identical and the Bedrock text output is still decoded with
json.loads(..., parse_float=Decimal), which DynamoDB requires (it rejects
floats). Replace the deprecated datetime.utcnow() with
datetime.now(timezone.utc) and drop the anthropic dependency.
* Grant Bedrock IAM, drop Anthropic secrets, add fallback alarm
Both stacks moved their processors from the Anthropic API to the Bedrock
inference profile us.anthropic.claude-haiku-4-5-20251001-v1:0. Grant each
processor role bedrock:InvokeModel + bedrock:InvokeModelWithResponseStream
on BOTH the inference-profile ARN AND the per-region foundation-model
ARNs for us-east-1/us-east-2/us-west-2 (empty-account) -- the us.* profile
routes cross-region, so a profile-only grant AccessDenies at runtime.
Remove both anthropic-api-key Secret constructs, their grant_read, and
the ANTHROPIC_API_KEY_SECRET_ARN env; add BEDROCK_MODEL_ID. The secrets
had RemovalPolicy.RETAIN so they are orphaned, not deleted -- flagged in
the README for manual post-deploy deletion and key revocation.
Add the workorder-email-processor-template-fallback-rate alarm: a
FILL(0) + >=10-sample volume-floor MathExpression over the EMF
ParseOutcome metric (15-min periods) that pages when the AI-fallback
share exceeds 15% sustained, catching Hexagon template drift. ALARM-only
SnsAction to site-alerts, no OK action, NOT_BREACHING, matching the
existing stack idiom.
* Add offline WO parser test suite
Cover the deterministic parser with golden-file tests over 55 real
scrubbed .eml fixtures (both comment sub-shapes, username Submitted-By,
address present/absent, br+CRLF assign addresses), fail-closed
validation-gate rules, adversarial and prompt-injection cases that must
route to ai_fallback or parse without corrupting other fields, the issue
#23 comment_id idempotency invariants, and the Bedrock-fallback dispatch
plus EMF-metric emission with a mocked invoke_model.
Extend pytest.ini testpaths to discover the co-located suite, and update
tests/conftest.load_handler to put a handler's own directory on sys.path
so the WO handler's new `from template_parser import ...` resolves under
the existing shared handler tests. Point test_local.py at the new
template-first + Bedrock flow.
Refs: #23
* Document Bedrock migration and WO parse flow in README
Record the provider switch to the Bedrock inference profile (no Anthropic
API key or Secrets Manager secret, with the retired secrets flagged for
manual deletion), the WO deterministic-template-first + AI-fallback flow,
the new ParseOutcome EMF metric and template-fallback-rate alarm, the
issue #23 comment_id format change, the +00:00 aware-UTC timestamp shift,
and offline test instructions.
Refs: #23
* Fix f-string lint and formatting in backfill scripts
Drop the f prefix from two f-strings that carry no placeholders
(F541) and apply ruff format, so `ruff check` / `ruff format --check`
pass in CI.
* Emit ParseMethod-only EMF set so fallback alarm can fire
The fallback-rate alarm queries the ParseOutcome series keyed on
ParseMethod alone, but the emitter published only the joint
(ParseMethod, TemplateId) dimension set. CloudWatch materializes
exactly the listed dimension sets and does not auto-aggregate, so the
alarm's series never received data: it evaluated a constant 0 and
could never page on template-drift coverage collapse.
Publish both ["ParseMethod"] and ["ParseMethod","TemplateId"] and
update the EMF regression test to assert both sets are present.
* Commit WO parser .eml fixtures for executable coverage
The parser test suite globbed for input .eml fixtures that the repo's
`*.eml` ignore rule kept uncommitted, so every parametrized golden and
fail-closed test collected zero cases and CI could not exercise the
deterministic parser that handles 100% of WO email volume.
Add a fixtures-only negation to .gitignore and commit the 55 scrubbed
positive samples (50 update-plaintext, 5 assign-html) plus 14
ai-fallback and 3 adversarial fixtures. The ai-fallback set covers each
fail-closed reason code (subject_no_match, single_space_work_order,
malformed_site_code, label_bleed, creation_time_unparseable,
wo_id_mismatch, missing_required_field) and the adversarial set proves
the parser is total and confines prompt-injection payloads to
comment_text without steering the structured fields.
* feature: Add PO template parser scaffold and design doc
Mirror WO PR #99's template-first approach for the Coupa PO processor. Two templates identified from a full 3,448-email triage:
- coupa_new_po (95.5%): scaffolded; fails closed to the LLM until extract_new_po lands.
- coupa_cancellation (2.9%): implemented.
Nested contract with recursive validation, Decimal money, and a fail-closed gate. Derived fields (site_code/trade/fiscal_year) are deferred to a shared post-stage. Comments, revisions, multi-line, and non-USD emails fall back to Bedrock. docs/po-template-parser.md records the investigation, decisions, and remaining work.
Signed-off-by: Adam Moussa <166072409+amoussa1229@users.noreply.github.com>
* Implement PO new_po extraction and value-level gate
Replace the extract_new_po scaffold stub with the full
section-windowed extractor (duplicate-label anchoring, sentinel
ship-to, label-keyed U+2022 bullet split, Decimal money from three
anchored contexts only) and add value-level gate rules V1-V13.
Both new_po_not_implemented scaffold guards are removed; rules 6-8
(unrecognized_status, multiline_unsupported, non_usd) go live.
The gate re-derives every byte proof from the email body so an
extractor bug cannot vouch for itself: amount re-serialization
with a digit/comma border check (the thousands-separator
truncation kill switch), sum(lines)==total against both Total
blocks, anchor/supplier identity proofs, USPS address shape on
the raw pre-enrichment zip, bullet label discipline, and
sentinel/artifact hygiene. Any failure falls closed to the LLM;
a validation failure is never a parsed result.
Refs: #99
* Wire template-first parse into PO handler with EMF metric
Run try_deterministic_parse ahead of the Bedrock extractor and
fall back only on a miss/invalid (fail-closed) result. The shared
enrich_parsed post-stage and the save_cancellation/save_revision/
save_new_po routing are untouched, so both paths write identical
DynamoDB shapes and the po-ingest-site-extractor stream contract
is preserved.
Each record emits one ParseMethod EMF line (Seahaven/PoIngest/
ParseOutcome, dimension sets [ParseMethod] and
[ParseMethod,TemplateId], ReasonCode/po_number ride-alongs)
mirroring the WO idiom. The metric fires before the Bedrock call
so a Bedrock-side error still records the ai_fallback outcome.
Refs: #99
* Add PO fallback-rate alarm retuned for ~57 emails/day
The WO alarm's 15-min period and >=10-sample floor assume
~760/day and would be structurally dead at PO volume (a 15-min
period holds ~0.6 emails, so the floor is never met). Retune:
6-hour periods (~14.25 expected emails), IF((fb+tmpl)>=8,...)
volume floor so a single email can never breach a datapoint
(1/8 = 12.5% < 20%), threshold >20% against a ~1% expected
baseline, eval 4 / datapoints 2 (24h span) so noise self-clears
while total template drift pages within ~12h. No element-wise
MAX in the math expression (post-#102 rule); ALARM-only
SnsAction to site-alerts, NOT_BREACHING. Gated with
'npx cdk synth po-ingest'.
Also add template_parser.py to the bundling cp list -- without it
every deployed invocation would ImportError (unit tests cannot
catch an asset-bundling omission).
Refs: #99, #102
* Add offline PO parser suite with scrubbed fixture corpus
132 tests: golden-file comparison for all 25 positive fixtures
(17 single-line new-PO + 8 cancellations, Decimal-exact via
parse_float=Decimal), every fail-closed gate reason code covered
(body-level triggers via 17 synthetic adversarial .eml mutations,
candidate-level via direct validate() unit tests), real multi-line
and comment/non-Coupa fallback fixtures, dual line-ending parse
identity, two-path enrich/save parity (site-extractor stream
guard), V10 URL-id corpus sweep, fixture hygiene (ses_auth pass +
scrub-marker leak sweep), and Bedrock dispatch/EMF assertions.
The suite loads handler/template_parser via importlib under
unique module names and binds the handler's bare sibling imports
around exec (tests/conftest.py load_handler gets the same
treatment) -- the WO suite caches bare 'handler'/'template_parser'
names in sys.modules, and bare imports here would silently bind
to the wrong pipeline. moto is imported before the handler so its
botocore stubber hook precedes boto3 session creation (the PO
conftest chain now loads at pytest session start).
Fixtures are scrubbed real S3 samples: transport/auth header
values replaced with same-shape placeholders (structure kept so
ses_auth still passes), per-file digit ciphers, amounts remapped
with sum==total re-established. The .gitignore exception is
scoped to the PO fixtures path only.
Refs: #99
* Document PO template-first parser and retuned alarm
README: PO flow is now template-first with Bedrock fallback;
parser/gate section mirroring the WO writeup; Seahaven/PoIngest
ParseOutcome namespace and the fallback-rate alarm numbers with
their volume justification (deliberately not WO's settings);
test-suite and repo-layout updates.
Design doc: mark PR #1 complete in progress/checklist sections;
document the six value-level gate reason codes and the scaffold
guard removal; correct the stale data-access note (default CLI
session is 328440206208) and note the ~90-day S3 lifecycle aging
of the corpus; record the 2.3 layout addendum (leading Supplier
bullet segment, EA evidence lines, summary unit-price tokens,
decode-path line endings), the fixture-build pins (address join
convention, quantity/unit/price source), the V10 sweep outcome,
and resolutions for open questions Q3/Q6. Cross-family review and
the Confluence architecture-map update are flagged outstanding
for merge.
Refs: #99
* Record cross-family review outcome for handler wiring
GPT-4.1 cross_review.py run against the real handler diff
returned no BLOCK and no security findings; both FIX items
verified as no-change-needed (fallback logging already correct;
non-dict AI output is the pre-existing issue #101 pattern this
PR deliberately does not touch).
Refs: #99
* Pin line-item currency to USD in the PO gate
The non_usd rule only checked the Total-block top-level currency, so a
new_po whose line item read 'for 55,206.00 CAD' under a USD Total block
still template-parsed as ok -- a fail-open hole in the fail-closed
gate. Every line item's captured currency and its re-derived body token
must now byte-equal the proven-USD top-level currency; covered by a
line-level CAD adversarial fixture (the existing adv-non-usd only
exercised the Total-block variant) and a candidate-mutation unit test.
* Scrub residual transport tokens from PO fixtures
The first-pass harvest scrub sanitized only the primary SES/DKIM
header blocks, leaving the real SES Feedback-ID sender-identity hash
in 49 committed fixtures and, on the two non-Coupa fixtures, an
embedded second SES block's X-Ses-Receipt, the Exchange cross-tenant
UPN ciphertext, and Gmail ARC fh= / X-Gm-* tokens -- exactly the
token classes the PR #99 fixture lesson requires placeholdered.
Replace each with a same-shape ScrubbedFixture value (byte-safe,
CRLF and folding preserved) so header structure and ses_auth
behavior are unchanged.
* Converge quantity/price to Decimal on both paths
EXTRACTION_PROMPT declares quantity and price as JSON strings, so a
prompt-obedient Bedrock response stores DynamoDB Strings where the
template parser stores Numbers -- divergent attribute types for the
same email on the purchase-orders stream. Coerce numeric strings to
Decimal in the shared enrich_parsed post-stage (thousands-separator
safe; non-numeric strings kept verbatim) so both paths converge;
prompt rewording itself remains PR #2 scope.
The two-path parity test was circular -- it replayed the parser-
derived golden as 'the LLM output', so it could never see the type
divergence. It now feeds a prompt-shaped payload (string quantity/
price, LLM-filled site_code) through enrich_parsed and save_new_po,
and the fixture-hygiene test now asserts the scrubbed transport-token
header classes so fixture regressions are caught.
* Coerce bare-int quantity/price to Decimal in enrich_parsed
GPT-4.1 cross-family review of the final PR diff (no BLOCK) flagged
residual type drift: parse_float=Decimal rules out floats on the LLM
path, but a bare JSON int survived as Python int. Coerce it so both
parse paths emit one canonical Decimal type.
* Scrub fixture-body PII and harden cancellation gate (sec review)
/sh-security-review of PR #105 (5 fresh-context detectors + proof-or-kill
verifier) confirmed two diff-introduced findings; both fixed here.
F3 (medium, real PII in new fixtures): the harvest scrub replaced header
tokens but left real third-party PII in message BODIES -- an Amazon
contact's name/phone/personal email in non-coupa-02.eml and an internal
t.corp.amazon.com ticket URL in comment-02.eml, plus real submitter/attn
names recurring across the new_po corpus. Replaced every personal name,
phone, personal email, and internal URL with synthetic placeholders
(QP-soft-wrap aware) across both .eml bodies and expected goldens.
Extended test_fixture_hygiene to scan BODIES (phone shapes, corp URLs,
the leaked tokens), closing the header-only gap that let this through.
F1 (medium, cancellation gate): _CANCELLATION_SUBJECT was unanchored and
matched with .search(), unlike the anchored new_po pattern -- a subject
merely ending with the cancellation phrase could be routed to the sticky-
Cancelled write. Fully anchored it and switched to .match, and added a
body-corroboration gate (the real Coupa body independently restates
'Purchase Order #<po> ... has been cancelled'); a near-miss/misrouted
subject whose body does not corroborate now fails closed to the LLM
(new reason code cancellation_body_unconfirmed).
Pre-existing (advisory, not this PR): the LLM-fallback else->save_new_po
dispatch and undelimited extraction prompt (issue #101 family) are
byte-identical to main and unchanged here.
401 tests pass; ruff/format clean; cdk synth po-ingest clean.
---------
Signed-off-by: Adam Moussa <166072409+amoussa1229@users.noreply.github.com>
2026-07-16 17:50:59 -04:00
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"""Pytest fixtures for the purchase-order email-processor suite.
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Path/env setup and the reusable helpers live in ``_po_parser_support`` (a
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uniquely named module) so the test files never do ``from conftest import``,
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which would be ambiguous against the repo's top-level ``tests/conftest.py``.
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"""
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import pytest
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feat: decompose email-processor handlers into flat siblings + lazy boto3 clients (refactor phase 5) (#113)
Both email-processor God-handlers split along the seams that already
work in the flat-sibling pattern established by lambdas/shared/, so
bare-name imports keep working under the existing bundling glob.
PO (5-way split): handler.py keeps only the event loop, fail-closed
auth, and email_type routing. extraction.py holds extract_with_claude
and _EMAIL_TAG_RE, importing EXTRACTION_PROMPT from prompts.py and
parse_raw_email from shared/email_parsing.py rather than recreating a
PO-local copy. enrichment.py is a pure code move of enrich_parsed and
pad_zip (PO-only; WO has no enrichment stage) with zero behavior
change. telemetry.py holds the EMF ParseMethod emit wrappers.
persistence.py holds _write_fields/_merge_update/save_*, collapsing
the byte-identical save_new_po/save_revision bodies into one
_save_merge helper that both now call through, preserving the sticky
Cancelled ConditionExpression guard for both callers; save_cancellation
stays separate.
WO (5 concerns, no enrichment stage): the handler loop keeps
validate_ai_fallback and the re.fullmatch(r"[0-9]+", work_order_id)
key guard ahead of both save_work_order and save_event, since the
guard protects the DynamoDB partition key and the '#'-delimited
comment_id range-key segment. _header_date_iso and comment_id
determinism stay colocated with persistence.py's save_event for the
retry-idempotent event_id key.
EXTRACTION_PROMPT (PO) moves to prompts.py with cross-reference
headers to derived_fields.py's authoritative trade/site/fiscal rule
tables; handler.py re-exports it (from prompts import
EXTRACTION_PROMPT) since four tests dereference handler.EXTRACTION_
PROMPT directly. WO's prompt moves the same way.
I/O modules (extraction.py's bedrock client, persistence.py's
dynamodb resource, handler.py's s3 client) get lazy cached boto3
accessors; pure modules (enrichment.py, prompts.py, telemetry.py)
import no boto3. Test monkeypatch surfaces move to the module that
now owns the client (e.g. persistence.dynamodb) everywhere tests
patch it, and the moto-before-handler-import ordering in
_po_parser_support.py is preserved so the moto-backed suites don't
hit real AWS.
Behavior-preservation pins, verified with tests: PO still emits
ParseMethod=ai_fallback before the Bedrock call, with
ai_fallback_rejected as the additive second datapoint on rejection.
WO still emits after its gate with mutually-exclusive ai_fallback /
ai_fallback_rejected. Shadow DerivedFieldAgreement telemetry stays
ai_fallback-only. derived_fields.py is untouched (diff against
feature/phase-3-shared-extraction is empty). handler(event, context)
signatures and the save_* public contract are unchanged on both
pipelines; goldens unchanged.
PO_EXPECTED_TOP_LEVEL_MODULES and its WO equivalent in
tests/test_bundle_consistency.py are updated for the new sibling
modules so the AST bundle-consistency test still fails on an
unshipped or uncommented-out sibling.
2026-07-20 15:34:53 -04:00
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from _po_parser_support import FakeDynamoResource, po_persistence
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feat: template-first PO parser with fail-closed gate and Bedrock fallback (#105)
* Add deterministic template parser for WO emails
The workorder-email-processor sends every one of ~22.9k emails/month to
an LLM, but ~93.6% are the plain-text "AMAZON UPDATE WO DETAILS" comment
template and ~6.4% the HTML "AMAZON assign Work Order" template. Parse
those two shapes deterministically, offline, so the AI call is reserved
for the long tail.
The module is pure (no boto3, no network). try_deterministic_parse
classifies by subject, extracts the shared contract fields, and returns
a result ONLY when it passes a strict fail-closed validation gate: exact
contract-key set, subject/id agreement, the literal "Work Order: <id>"
double space, per-type required fields, site-code shape, and a
label-bleed guard so a value that over-ran into the next field fails.
Any miss, drift, or extractor exception yields None so the caller falls
back to the AI extractor -- data is never corrupted, only the fallback
rate rises.
Refs: #23
* Migrate WO processor to Bedrock and fix comment_id collision
Switch the AI path from the Anthropic SDK to bedrock-runtime InvokeModel
on the inference profile us.anthropic.claude-haiku-4-5-20251001-v1:0
(BEDROCK_MODEL_ID env), so parsing no longer needs a provider API key or
Secrets Manager secret. The EXTRACTION_PROMPT and JSON contract are kept
byte-identical, so the AI-fallback output is unchanged. Try the new
deterministic template parser first and only call Bedrock on a
miss/invalid result.
Fix issue #23: the WorkOrderComments range key was
work_order_id#<comment_time>, so two emails on one WO with an identical
or absent comment time collided and overwrote each other. Derive a
12-hex suffix from the S3 object key alone -- deterministic, so an async
retry of the same object is byte-identical (idempotent) while distinct
emails get distinct keys -- and keep wall-clock now() out of the key
(literal 'nocomment' segment when comment_time is absent).
Also emit one CloudWatch EMF line per record (Seahaven/WorkorderIngest
ParseOutcome, dimensioned by ParseMethod/TemplateId) for parse-outcome
observability, replace the deprecated datetime.utcnow() with
datetime.now(timezone.utc), and drop the anthropic dependency.
Refs: #23
* Migrate PO processor to Bedrock
Switch the PO email processor's AI extraction from the Anthropic SDK to
bedrock-runtime InvokeModel on the inference profile
us.anthropic.claude-haiku-4-5-20251001-v1:0 (BEDROCK_MODEL_ID env), so
it no longer needs a provider API key or Secrets Manager secret. PO
parsing stays fully AI -- only the provider changes. The EXTRACTION_PROMPT
is kept byte-identical and the Bedrock text output is still decoded with
json.loads(..., parse_float=Decimal), which DynamoDB requires (it rejects
floats). Replace the deprecated datetime.utcnow() with
datetime.now(timezone.utc) and drop the anthropic dependency.
* Grant Bedrock IAM, drop Anthropic secrets, add fallback alarm
Both stacks moved their processors from the Anthropic API to the Bedrock
inference profile us.anthropic.claude-haiku-4-5-20251001-v1:0. Grant each
processor role bedrock:InvokeModel + bedrock:InvokeModelWithResponseStream
on BOTH the inference-profile ARN AND the per-region foundation-model
ARNs for us-east-1/us-east-2/us-west-2 (empty-account) -- the us.* profile
routes cross-region, so a profile-only grant AccessDenies at runtime.
Remove both anthropic-api-key Secret constructs, their grant_read, and
the ANTHROPIC_API_KEY_SECRET_ARN env; add BEDROCK_MODEL_ID. The secrets
had RemovalPolicy.RETAIN so they are orphaned, not deleted -- flagged in
the README for manual post-deploy deletion and key revocation.
Add the workorder-email-processor-template-fallback-rate alarm: a
FILL(0) + >=10-sample volume-floor MathExpression over the EMF
ParseOutcome metric (15-min periods) that pages when the AI-fallback
share exceeds 15% sustained, catching Hexagon template drift. ALARM-only
SnsAction to site-alerts, no OK action, NOT_BREACHING, matching the
existing stack idiom.
* Add offline WO parser test suite
Cover the deterministic parser with golden-file tests over 55 real
scrubbed .eml fixtures (both comment sub-shapes, username Submitted-By,
address present/absent, br+CRLF assign addresses), fail-closed
validation-gate rules, adversarial and prompt-injection cases that must
route to ai_fallback or parse without corrupting other fields, the issue
#23 comment_id idempotency invariants, and the Bedrock-fallback dispatch
plus EMF-metric emission with a mocked invoke_model.
Extend pytest.ini testpaths to discover the co-located suite, and update
tests/conftest.load_handler to put a handler's own directory on sys.path
so the WO handler's new `from template_parser import ...` resolves under
the existing shared handler tests. Point test_local.py at the new
template-first + Bedrock flow.
Refs: #23
* Document Bedrock migration and WO parse flow in README
Record the provider switch to the Bedrock inference profile (no Anthropic
API key or Secrets Manager secret, with the retired secrets flagged for
manual deletion), the WO deterministic-template-first + AI-fallback flow,
the new ParseOutcome EMF metric and template-fallback-rate alarm, the
issue #23 comment_id format change, the +00:00 aware-UTC timestamp shift,
and offline test instructions.
Refs: #23
* Fix f-string lint and formatting in backfill scripts
Drop the f prefix from two f-strings that carry no placeholders
(F541) and apply ruff format, so `ruff check` / `ruff format --check`
pass in CI.
* Emit ParseMethod-only EMF set so fallback alarm can fire
The fallback-rate alarm queries the ParseOutcome series keyed on
ParseMethod alone, but the emitter published only the joint
(ParseMethod, TemplateId) dimension set. CloudWatch materializes
exactly the listed dimension sets and does not auto-aggregate, so the
alarm's series never received data: it evaluated a constant 0 and
could never page on template-drift coverage collapse.
Publish both ["ParseMethod"] and ["ParseMethod","TemplateId"] and
update the EMF regression test to assert both sets are present.
* Commit WO parser .eml fixtures for executable coverage
The parser test suite globbed for input .eml fixtures that the repo's
`*.eml` ignore rule kept uncommitted, so every parametrized golden and
fail-closed test collected zero cases and CI could not exercise the
deterministic parser that handles 100% of WO email volume.
Add a fixtures-only negation to .gitignore and commit the 55 scrubbed
positive samples (50 update-plaintext, 5 assign-html) plus 14
ai-fallback and 3 adversarial fixtures. The ai-fallback set covers each
fail-closed reason code (subject_no_match, single_space_work_order,
malformed_site_code, label_bleed, creation_time_unparseable,
wo_id_mismatch, missing_required_field) and the adversarial set proves
the parser is total and confines prompt-injection payloads to
comment_text without steering the structured fields.
* feature: Add PO template parser scaffold and design doc
Mirror WO PR #99's template-first approach for the Coupa PO processor. Two templates identified from a full 3,448-email triage:
- coupa_new_po (95.5%): scaffolded; fails closed to the LLM until extract_new_po lands.
- coupa_cancellation (2.9%): implemented.
Nested contract with recursive validation, Decimal money, and a fail-closed gate. Derived fields (site_code/trade/fiscal_year) are deferred to a shared post-stage. Comments, revisions, multi-line, and non-USD emails fall back to Bedrock. docs/po-template-parser.md records the investigation, decisions, and remaining work.
Signed-off-by: Adam Moussa <166072409+amoussa1229@users.noreply.github.com>
* Implement PO new_po extraction and value-level gate
Replace the extract_new_po scaffold stub with the full
section-windowed extractor (duplicate-label anchoring, sentinel
ship-to, label-keyed U+2022 bullet split, Decimal money from three
anchored contexts only) and add value-level gate rules V1-V13.
Both new_po_not_implemented scaffold guards are removed; rules 6-8
(unrecognized_status, multiline_unsupported, non_usd) go live.
The gate re-derives every byte proof from the email body so an
extractor bug cannot vouch for itself: amount re-serialization
with a digit/comma border check (the thousands-separator
truncation kill switch), sum(lines)==total against both Total
blocks, anchor/supplier identity proofs, USPS address shape on
the raw pre-enrichment zip, bullet label discipline, and
sentinel/artifact hygiene. Any failure falls closed to the LLM;
a validation failure is never a parsed result.
Refs: #99
* Wire template-first parse into PO handler with EMF metric
Run try_deterministic_parse ahead of the Bedrock extractor and
fall back only on a miss/invalid (fail-closed) result. The shared
enrich_parsed post-stage and the save_cancellation/save_revision/
save_new_po routing are untouched, so both paths write identical
DynamoDB shapes and the po-ingest-site-extractor stream contract
is preserved.
Each record emits one ParseMethod EMF line (Seahaven/PoIngest/
ParseOutcome, dimension sets [ParseMethod] and
[ParseMethod,TemplateId], ReasonCode/po_number ride-alongs)
mirroring the WO idiom. The metric fires before the Bedrock call
so a Bedrock-side error still records the ai_fallback outcome.
Refs: #99
* Add PO fallback-rate alarm retuned for ~57 emails/day
The WO alarm's 15-min period and >=10-sample floor assume
~760/day and would be structurally dead at PO volume (a 15-min
period holds ~0.6 emails, so the floor is never met). Retune:
6-hour periods (~14.25 expected emails), IF((fb+tmpl)>=8,...)
volume floor so a single email can never breach a datapoint
(1/8 = 12.5% < 20%), threshold >20% against a ~1% expected
baseline, eval 4 / datapoints 2 (24h span) so noise self-clears
while total template drift pages within ~12h. No element-wise
MAX in the math expression (post-#102 rule); ALARM-only
SnsAction to site-alerts, NOT_BREACHING. Gated with
'npx cdk synth po-ingest'.
Also add template_parser.py to the bundling cp list -- without it
every deployed invocation would ImportError (unit tests cannot
catch an asset-bundling omission).
Refs: #99, #102
* Add offline PO parser suite with scrubbed fixture corpus
132 tests: golden-file comparison for all 25 positive fixtures
(17 single-line new-PO + 8 cancellations, Decimal-exact via
parse_float=Decimal), every fail-closed gate reason code covered
(body-level triggers via 17 synthetic adversarial .eml mutations,
candidate-level via direct validate() unit tests), real multi-line
and comment/non-Coupa fallback fixtures, dual line-ending parse
identity, two-path enrich/save parity (site-extractor stream
guard), V10 URL-id corpus sweep, fixture hygiene (ses_auth pass +
scrub-marker leak sweep), and Bedrock dispatch/EMF assertions.
The suite loads handler/template_parser via importlib under
unique module names and binds the handler's bare sibling imports
around exec (tests/conftest.py load_handler gets the same
treatment) -- the WO suite caches bare 'handler'/'template_parser'
names in sys.modules, and bare imports here would silently bind
to the wrong pipeline. moto is imported before the handler so its
botocore stubber hook precedes boto3 session creation (the PO
conftest chain now loads at pytest session start).
Fixtures are scrubbed real S3 samples: transport/auth header
values replaced with same-shape placeholders (structure kept so
ses_auth still passes), per-file digit ciphers, amounts remapped
with sum==total re-established. The .gitignore exception is
scoped to the PO fixtures path only.
Refs: #99
* Document PO template-first parser and retuned alarm
README: PO flow is now template-first with Bedrock fallback;
parser/gate section mirroring the WO writeup; Seahaven/PoIngest
ParseOutcome namespace and the fallback-rate alarm numbers with
their volume justification (deliberately not WO's settings);
test-suite and repo-layout updates.
Design doc: mark PR #1 complete in progress/checklist sections;
document the six value-level gate reason codes and the scaffold
guard removal; correct the stale data-access note (default CLI
session is 328440206208) and note the ~90-day S3 lifecycle aging
of the corpus; record the 2.3 layout addendum (leading Supplier
bullet segment, EA evidence lines, summary unit-price tokens,
decode-path line endings), the fixture-build pins (address join
convention, quantity/unit/price source), the V10 sweep outcome,
and resolutions for open questions Q3/Q6. Cross-family review and
the Confluence architecture-map update are flagged outstanding
for merge.
Refs: #99
* Record cross-family review outcome for handler wiring
GPT-4.1 cross_review.py run against the real handler diff
returned no BLOCK and no security findings; both FIX items
verified as no-change-needed (fallback logging already correct;
non-dict AI output is the pre-existing issue #101 pattern this
PR deliberately does not touch).
Refs: #99
* Pin line-item currency to USD in the PO gate
The non_usd rule only checked the Total-block top-level currency, so a
new_po whose line item read 'for 55,206.00 CAD' under a USD Total block
still template-parsed as ok -- a fail-open hole in the fail-closed
gate. Every line item's captured currency and its re-derived body token
must now byte-equal the proven-USD top-level currency; covered by a
line-level CAD adversarial fixture (the existing adv-non-usd only
exercised the Total-block variant) and a candidate-mutation unit test.
* Scrub residual transport tokens from PO fixtures
The first-pass harvest scrub sanitized only the primary SES/DKIM
header blocks, leaving the real SES Feedback-ID sender-identity hash
in 49 committed fixtures and, on the two non-Coupa fixtures, an
embedded second SES block's X-Ses-Receipt, the Exchange cross-tenant
UPN ciphertext, and Gmail ARC fh= / X-Gm-* tokens -- exactly the
token classes the PR #99 fixture lesson requires placeholdered.
Replace each with a same-shape ScrubbedFixture value (byte-safe,
CRLF and folding preserved) so header structure and ses_auth
behavior are unchanged.
* Converge quantity/price to Decimal on both paths
EXTRACTION_PROMPT declares quantity and price as JSON strings, so a
prompt-obedient Bedrock response stores DynamoDB Strings where the
template parser stores Numbers -- divergent attribute types for the
same email on the purchase-orders stream. Coerce numeric strings to
Decimal in the shared enrich_parsed post-stage (thousands-separator
safe; non-numeric strings kept verbatim) so both paths converge;
prompt rewording itself remains PR #2 scope.
The two-path parity test was circular -- it replayed the parser-
derived golden as 'the LLM output', so it could never see the type
divergence. It now feeds a prompt-shaped payload (string quantity/
price, LLM-filled site_code) through enrich_parsed and save_new_po,
and the fixture-hygiene test now asserts the scrubbed transport-token
header classes so fixture regressions are caught.
* Coerce bare-int quantity/price to Decimal in enrich_parsed
GPT-4.1 cross-family review of the final PR diff (no BLOCK) flagged
residual type drift: parse_float=Decimal rules out floats on the LLM
path, but a bare JSON int survived as Python int. Coerce it so both
parse paths emit one canonical Decimal type.
* Scrub fixture-body PII and harden cancellation gate (sec review)
/sh-security-review of PR #105 (5 fresh-context detectors + proof-or-kill
verifier) confirmed two diff-introduced findings; both fixed here.
F3 (medium, real PII in new fixtures): the harvest scrub replaced header
tokens but left real third-party PII in message BODIES -- an Amazon
contact's name/phone/personal email in non-coupa-02.eml and an internal
t.corp.amazon.com ticket URL in comment-02.eml, plus real submitter/attn
names recurring across the new_po corpus. Replaced every personal name,
phone, personal email, and internal URL with synthetic placeholders
(QP-soft-wrap aware) across both .eml bodies and expected goldens.
Extended test_fixture_hygiene to scan BODIES (phone shapes, corp URLs,
the leaked tokens), closing the header-only gap that let this through.
F1 (medium, cancellation gate): _CANCELLATION_SUBJECT was unanchored and
matched with .search(), unlike the anchored new_po pattern -- a subject
merely ending with the cancellation phrase could be routed to the sticky-
Cancelled write. Fully anchored it and switched to .match, and added a
body-corroboration gate (the real Coupa body independently restates
'Purchase Order #<po> ... has been cancelled'); a near-miss/misrouted
subject whose body does not corroborate now fails closed to the LLM
(new reason code cancellation_body_unconfirmed).
Pre-existing (advisory, not this PR): the LLM-fallback else->save_new_po
dispatch and undelimited extraction prompt (issue #101 family) are
byte-identical to main and unchanged here.
401 tests pass; ruff/format clean; cdk synth po-ingest clean.
---------
Signed-off-by: Adam Moussa <166072409+amoussa1229@users.noreply.github.com>
2026-07-16 17:50:59 -04:00
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@pytest.fixture
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def fake_dynamo(monkeypatch):
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feat: decompose email-processor handlers into flat siblings + lazy boto3 clients (refactor phase 5) (#113)
Both email-processor God-handlers split along the seams that already
work in the flat-sibling pattern established by lambdas/shared/, so
bare-name imports keep working under the existing bundling glob.
PO (5-way split): handler.py keeps only the event loop, fail-closed
auth, and email_type routing. extraction.py holds extract_with_claude
and _EMAIL_TAG_RE, importing EXTRACTION_PROMPT from prompts.py and
parse_raw_email from shared/email_parsing.py rather than recreating a
PO-local copy. enrichment.py is a pure code move of enrich_parsed and
pad_zip (PO-only; WO has no enrichment stage) with zero behavior
change. telemetry.py holds the EMF ParseMethod emit wrappers.
persistence.py holds _write_fields/_merge_update/save_*, collapsing
the byte-identical save_new_po/save_revision bodies into one
_save_merge helper that both now call through, preserving the sticky
Cancelled ConditionExpression guard for both callers; save_cancellation
stays separate.
WO (5 concerns, no enrichment stage): the handler loop keeps
validate_ai_fallback and the re.fullmatch(r"[0-9]+", work_order_id)
key guard ahead of both save_work_order and save_event, since the
guard protects the DynamoDB partition key and the '#'-delimited
comment_id range-key segment. _header_date_iso and comment_id
determinism stay colocated with persistence.py's save_event for the
retry-idempotent event_id key.
EXTRACTION_PROMPT (PO) moves to prompts.py with cross-reference
headers to derived_fields.py's authoritative trade/site/fiscal rule
tables; handler.py re-exports it (from prompts import
EXTRACTION_PROMPT) since four tests dereference handler.EXTRACTION_
PROMPT directly. WO's prompt moves the same way.
I/O modules (extraction.py's bedrock client, persistence.py's
dynamodb resource, handler.py's s3 client) get lazy cached boto3
accessors; pure modules (enrichment.py, prompts.py, telemetry.py)
import no boto3. Test monkeypatch surfaces move to the module that
now owns the client (e.g. persistence.dynamodb) everywhere tests
patch it, and the moto-before-handler-import ordering in
_po_parser_support.py is preserved so the moto-backed suites don't
hit real AWS.
Behavior-preservation pins, verified with tests: PO still emits
ParseMethod=ai_fallback before the Bedrock call, with
ai_fallback_rejected as the additive second datapoint on rejection.
WO still emits after its gate with mutually-exclusive ai_fallback /
ai_fallback_rejected. Shadow DerivedFieldAgreement telemetry stays
ai_fallback-only. derived_fields.py is untouched (diff against
feature/phase-3-shared-extraction is empty). handler(event, context)
signatures and the save_* public contract are unchanged on both
pipelines; goldens unchanged.
PO_EXPECTED_TOP_LEVEL_MODULES and its WO equivalent in
tests/test_bundle_consistency.py are updated for the new sibling
modules so the AST bundle-consistency test still fails on an
unshipped or uncommented-out sibling.
2026-07-20 15:34:53 -04:00
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# Phase 5: the dynamodb accessor cache lives on persistence.py now (the
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# module that owns every DynamoDB write); patch it there. The attribute name
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# is unchanged ("dynamodb") -- only the module moved. FakeDynamoResource
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# needs no .meta: its happy path never raises, so _merge_update's
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# `except _get_dynamodb().meta.client.exceptions...` clause is never
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# evaluated (moto exercises that path in tests/test_po_merge.py).
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feat: template-first PO parser with fail-closed gate and Bedrock fallback (#105)
* Add deterministic template parser for WO emails
The workorder-email-processor sends every one of ~22.9k emails/month to
an LLM, but ~93.6% are the plain-text "AMAZON UPDATE WO DETAILS" comment
template and ~6.4% the HTML "AMAZON assign Work Order" template. Parse
those two shapes deterministically, offline, so the AI call is reserved
for the long tail.
The module is pure (no boto3, no network). try_deterministic_parse
classifies by subject, extracts the shared contract fields, and returns
a result ONLY when it passes a strict fail-closed validation gate: exact
contract-key set, subject/id agreement, the literal "Work Order: <id>"
double space, per-type required fields, site-code shape, and a
label-bleed guard so a value that over-ran into the next field fails.
Any miss, drift, or extractor exception yields None so the caller falls
back to the AI extractor -- data is never corrupted, only the fallback
rate rises.
Refs: #23
* Migrate WO processor to Bedrock and fix comment_id collision
Switch the AI path from the Anthropic SDK to bedrock-runtime InvokeModel
on the inference profile us.anthropic.claude-haiku-4-5-20251001-v1:0
(BEDROCK_MODEL_ID env), so parsing no longer needs a provider API key or
Secrets Manager secret. The EXTRACTION_PROMPT and JSON contract are kept
byte-identical, so the AI-fallback output is unchanged. Try the new
deterministic template parser first and only call Bedrock on a
miss/invalid result.
Fix issue #23: the WorkOrderComments range key was
work_order_id#<comment_time>, so two emails on one WO with an identical
or absent comment time collided and overwrote each other. Derive a
12-hex suffix from the S3 object key alone -- deterministic, so an async
retry of the same object is byte-identical (idempotent) while distinct
emails get distinct keys -- and keep wall-clock now() out of the key
(literal 'nocomment' segment when comment_time is absent).
Also emit one CloudWatch EMF line per record (Seahaven/WorkorderIngest
ParseOutcome, dimensioned by ParseMethod/TemplateId) for parse-outcome
observability, replace the deprecated datetime.utcnow() with
datetime.now(timezone.utc), and drop the anthropic dependency.
Refs: #23
* Migrate PO processor to Bedrock
Switch the PO email processor's AI extraction from the Anthropic SDK to
bedrock-runtime InvokeModel on the inference profile
us.anthropic.claude-haiku-4-5-20251001-v1:0 (BEDROCK_MODEL_ID env), so
it no longer needs a provider API key or Secrets Manager secret. PO
parsing stays fully AI -- only the provider changes. The EXTRACTION_PROMPT
is kept byte-identical and the Bedrock text output is still decoded with
json.loads(..., parse_float=Decimal), which DynamoDB requires (it rejects
floats). Replace the deprecated datetime.utcnow() with
datetime.now(timezone.utc) and drop the anthropic dependency.
* Grant Bedrock IAM, drop Anthropic secrets, add fallback alarm
Both stacks moved their processors from the Anthropic API to the Bedrock
inference profile us.anthropic.claude-haiku-4-5-20251001-v1:0. Grant each
processor role bedrock:InvokeModel + bedrock:InvokeModelWithResponseStream
on BOTH the inference-profile ARN AND the per-region foundation-model
ARNs for us-east-1/us-east-2/us-west-2 (empty-account) -- the us.* profile
routes cross-region, so a profile-only grant AccessDenies at runtime.
Remove both anthropic-api-key Secret constructs, their grant_read, and
the ANTHROPIC_API_KEY_SECRET_ARN env; add BEDROCK_MODEL_ID. The secrets
had RemovalPolicy.RETAIN so they are orphaned, not deleted -- flagged in
the README for manual post-deploy deletion and key revocation.
Add the workorder-email-processor-template-fallback-rate alarm: a
FILL(0) + >=10-sample volume-floor MathExpression over the EMF
ParseOutcome metric (15-min periods) that pages when the AI-fallback
share exceeds 15% sustained, catching Hexagon template drift. ALARM-only
SnsAction to site-alerts, no OK action, NOT_BREACHING, matching the
existing stack idiom.
* Add offline WO parser test suite
Cover the deterministic parser with golden-file tests over 55 real
scrubbed .eml fixtures (both comment sub-shapes, username Submitted-By,
address present/absent, br+CRLF assign addresses), fail-closed
validation-gate rules, adversarial and prompt-injection cases that must
route to ai_fallback or parse without corrupting other fields, the issue
#23 comment_id idempotency invariants, and the Bedrock-fallback dispatch
plus EMF-metric emission with a mocked invoke_model.
Extend pytest.ini testpaths to discover the co-located suite, and update
tests/conftest.load_handler to put a handler's own directory on sys.path
so the WO handler's new `from template_parser import ...` resolves under
the existing shared handler tests. Point test_local.py at the new
template-first + Bedrock flow.
Refs: #23
* Document Bedrock migration and WO parse flow in README
Record the provider switch to the Bedrock inference profile (no Anthropic
API key or Secrets Manager secret, with the retired secrets flagged for
manual deletion), the WO deterministic-template-first + AI-fallback flow,
the new ParseOutcome EMF metric and template-fallback-rate alarm, the
issue #23 comment_id format change, the +00:00 aware-UTC timestamp shift,
and offline test instructions.
Refs: #23
* Fix f-string lint and formatting in backfill scripts
Drop the f prefix from two f-strings that carry no placeholders
(F541) and apply ruff format, so `ruff check` / `ruff format --check`
pass in CI.
* Emit ParseMethod-only EMF set so fallback alarm can fire
The fallback-rate alarm queries the ParseOutcome series keyed on
ParseMethod alone, but the emitter published only the joint
(ParseMethod, TemplateId) dimension set. CloudWatch materializes
exactly the listed dimension sets and does not auto-aggregate, so the
alarm's series never received data: it evaluated a constant 0 and
could never page on template-drift coverage collapse.
Publish both ["ParseMethod"] and ["ParseMethod","TemplateId"] and
update the EMF regression test to assert both sets are present.
* Commit WO parser .eml fixtures for executable coverage
The parser test suite globbed for input .eml fixtures that the repo's
`*.eml` ignore rule kept uncommitted, so every parametrized golden and
fail-closed test collected zero cases and CI could not exercise the
deterministic parser that handles 100% of WO email volume.
Add a fixtures-only negation to .gitignore and commit the 55 scrubbed
positive samples (50 update-plaintext, 5 assign-html) plus 14
ai-fallback and 3 adversarial fixtures. The ai-fallback set covers each
fail-closed reason code (subject_no_match, single_space_work_order,
malformed_site_code, label_bleed, creation_time_unparseable,
wo_id_mismatch, missing_required_field) and the adversarial set proves
the parser is total and confines prompt-injection payloads to
comment_text without steering the structured fields.
* feature: Add PO template parser scaffold and design doc
Mirror WO PR #99's template-first approach for the Coupa PO processor. Two templates identified from a full 3,448-email triage:
- coupa_new_po (95.5%): scaffolded; fails closed to the LLM until extract_new_po lands.
- coupa_cancellation (2.9%): implemented.
Nested contract with recursive validation, Decimal money, and a fail-closed gate. Derived fields (site_code/trade/fiscal_year) are deferred to a shared post-stage. Comments, revisions, multi-line, and non-USD emails fall back to Bedrock. docs/po-template-parser.md records the investigation, decisions, and remaining work.
Signed-off-by: Adam Moussa <166072409+amoussa1229@users.noreply.github.com>
* Implement PO new_po extraction and value-level gate
Replace the extract_new_po scaffold stub with the full
section-windowed extractor (duplicate-label anchoring, sentinel
ship-to, label-keyed U+2022 bullet split, Decimal money from three
anchored contexts only) and add value-level gate rules V1-V13.
Both new_po_not_implemented scaffold guards are removed; rules 6-8
(unrecognized_status, multiline_unsupported, non_usd) go live.
The gate re-derives every byte proof from the email body so an
extractor bug cannot vouch for itself: amount re-serialization
with a digit/comma border check (the thousands-separator
truncation kill switch), sum(lines)==total against both Total
blocks, anchor/supplier identity proofs, USPS address shape on
the raw pre-enrichment zip, bullet label discipline, and
sentinel/artifact hygiene. Any failure falls closed to the LLM;
a validation failure is never a parsed result.
Refs: #99
* Wire template-first parse into PO handler with EMF metric
Run try_deterministic_parse ahead of the Bedrock extractor and
fall back only on a miss/invalid (fail-closed) result. The shared
enrich_parsed post-stage and the save_cancellation/save_revision/
save_new_po routing are untouched, so both paths write identical
DynamoDB shapes and the po-ingest-site-extractor stream contract
is preserved.
Each record emits one ParseMethod EMF line (Seahaven/PoIngest/
ParseOutcome, dimension sets [ParseMethod] and
[ParseMethod,TemplateId], ReasonCode/po_number ride-alongs)
mirroring the WO idiom. The metric fires before the Bedrock call
so a Bedrock-side error still records the ai_fallback outcome.
Refs: #99
* Add PO fallback-rate alarm retuned for ~57 emails/day
The WO alarm's 15-min period and >=10-sample floor assume
~760/day and would be structurally dead at PO volume (a 15-min
period holds ~0.6 emails, so the floor is never met). Retune:
6-hour periods (~14.25 expected emails), IF((fb+tmpl)>=8,...)
volume floor so a single email can never breach a datapoint
(1/8 = 12.5% < 20%), threshold >20% against a ~1% expected
baseline, eval 4 / datapoints 2 (24h span) so noise self-clears
while total template drift pages within ~12h. No element-wise
MAX in the math expression (post-#102 rule); ALARM-only
SnsAction to site-alerts, NOT_BREACHING. Gated with
'npx cdk synth po-ingest'.
Also add template_parser.py to the bundling cp list -- without it
every deployed invocation would ImportError (unit tests cannot
catch an asset-bundling omission).
Refs: #99, #102
* Add offline PO parser suite with scrubbed fixture corpus
132 tests: golden-file comparison for all 25 positive fixtures
(17 single-line new-PO + 8 cancellations, Decimal-exact via
parse_float=Decimal), every fail-closed gate reason code covered
(body-level triggers via 17 synthetic adversarial .eml mutations,
candidate-level via direct validate() unit tests), real multi-line
and comment/non-Coupa fallback fixtures, dual line-ending parse
identity, two-path enrich/save parity (site-extractor stream
guard), V10 URL-id corpus sweep, fixture hygiene (ses_auth pass +
scrub-marker leak sweep), and Bedrock dispatch/EMF assertions.
The suite loads handler/template_parser via importlib under
unique module names and binds the handler's bare sibling imports
around exec (tests/conftest.py load_handler gets the same
treatment) -- the WO suite caches bare 'handler'/'template_parser'
names in sys.modules, and bare imports here would silently bind
to the wrong pipeline. moto is imported before the handler so its
botocore stubber hook precedes boto3 session creation (the PO
conftest chain now loads at pytest session start).
Fixtures are scrubbed real S3 samples: transport/auth header
values replaced with same-shape placeholders (structure kept so
ses_auth still passes), per-file digit ciphers, amounts remapped
with sum==total re-established. The .gitignore exception is
scoped to the PO fixtures path only.
Refs: #99
* Document PO template-first parser and retuned alarm
README: PO flow is now template-first with Bedrock fallback;
parser/gate section mirroring the WO writeup; Seahaven/PoIngest
ParseOutcome namespace and the fallback-rate alarm numbers with
their volume justification (deliberately not WO's settings);
test-suite and repo-layout updates.
Design doc: mark PR #1 complete in progress/checklist sections;
document the six value-level gate reason codes and the scaffold
guard removal; correct the stale data-access note (default CLI
session is 328440206208) and note the ~90-day S3 lifecycle aging
of the corpus; record the 2.3 layout addendum (leading Supplier
bullet segment, EA evidence lines, summary unit-price tokens,
decode-path line endings), the fixture-build pins (address join
convention, quantity/unit/price source), the V10 sweep outcome,
and resolutions for open questions Q3/Q6. Cross-family review and
the Confluence architecture-map update are flagged outstanding
for merge.
Refs: #99
* Record cross-family review outcome for handler wiring
GPT-4.1 cross_review.py run against the real handler diff
returned no BLOCK and no security findings; both FIX items
verified as no-change-needed (fallback logging already correct;
non-dict AI output is the pre-existing issue #101 pattern this
PR deliberately does not touch).
Refs: #99
* Pin line-item currency to USD in the PO gate
The non_usd rule only checked the Total-block top-level currency, so a
new_po whose line item read 'for 55,206.00 CAD' under a USD Total block
still template-parsed as ok -- a fail-open hole in the fail-closed
gate. Every line item's captured currency and its re-derived body token
must now byte-equal the proven-USD top-level currency; covered by a
line-level CAD adversarial fixture (the existing adv-non-usd only
exercised the Total-block variant) and a candidate-mutation unit test.
* Scrub residual transport tokens from PO fixtures
The first-pass harvest scrub sanitized only the primary SES/DKIM
header blocks, leaving the real SES Feedback-ID sender-identity hash
in 49 committed fixtures and, on the two non-Coupa fixtures, an
embedded second SES block's X-Ses-Receipt, the Exchange cross-tenant
UPN ciphertext, and Gmail ARC fh= / X-Gm-* tokens -- exactly the
token classes the PR #99 fixture lesson requires placeholdered.
Replace each with a same-shape ScrubbedFixture value (byte-safe,
CRLF and folding preserved) so header structure and ses_auth
behavior are unchanged.
* Converge quantity/price to Decimal on both paths
EXTRACTION_PROMPT declares quantity and price as JSON strings, so a
prompt-obedient Bedrock response stores DynamoDB Strings where the
template parser stores Numbers -- divergent attribute types for the
same email on the purchase-orders stream. Coerce numeric strings to
Decimal in the shared enrich_parsed post-stage (thousands-separator
safe; non-numeric strings kept verbatim) so both paths converge;
prompt rewording itself remains PR #2 scope.
The two-path parity test was circular -- it replayed the parser-
derived golden as 'the LLM output', so it could never see the type
divergence. It now feeds a prompt-shaped payload (string quantity/
price, LLM-filled site_code) through enrich_parsed and save_new_po,
and the fixture-hygiene test now asserts the scrubbed transport-token
header classes so fixture regressions are caught.
* Coerce bare-int quantity/price to Decimal in enrich_parsed
GPT-4.1 cross-family review of the final PR diff (no BLOCK) flagged
residual type drift: parse_float=Decimal rules out floats on the LLM
path, but a bare JSON int survived as Python int. Coerce it so both
parse paths emit one canonical Decimal type.
* Scrub fixture-body PII and harden cancellation gate (sec review)
/sh-security-review of PR #105 (5 fresh-context detectors + proof-or-kill
verifier) confirmed two diff-introduced findings; both fixed here.
F3 (medium, real PII in new fixtures): the harvest scrub replaced header
tokens but left real third-party PII in message BODIES -- an Amazon
contact's name/phone/personal email in non-coupa-02.eml and an internal
t.corp.amazon.com ticket URL in comment-02.eml, plus real submitter/attn
names recurring across the new_po corpus. Replaced every personal name,
phone, personal email, and internal URL with synthetic placeholders
(QP-soft-wrap aware) across both .eml bodies and expected goldens.
Extended test_fixture_hygiene to scan BODIES (phone shapes, corp URLs,
the leaked tokens), closing the header-only gap that let this through.
F1 (medium, cancellation gate): _CANCELLATION_SUBJECT was unanchored and
matched with .search(), unlike the anchored new_po pattern -- a subject
merely ending with the cancellation phrase could be routed to the sticky-
Cancelled write. Fully anchored it and switched to .match, and added a
body-corroboration gate (the real Coupa body independently restates
'Purchase Order #<po> ... has been cancelled'); a near-miss/misrouted
subject whose body does not corroborate now fails closed to the LLM
(new reason code cancellation_body_unconfirmed).
Pre-existing (advisory, not this PR): the LLM-fallback else->save_new_po
dispatch and undelimited extraction prompt (issue #101 family) are
byte-identical to main and unchanged here.
401 tests pass; ruff/format clean; cdk synth po-ingest clean.
---------
Signed-off-by: Adam Moussa <166072409+amoussa1229@users.noreply.github.com>
2026-07-16 17:50:59 -04:00
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fake = FakeDynamoResource()
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feat: decompose email-processor handlers into flat siblings + lazy boto3 clients (refactor phase 5) (#113)
Both email-processor God-handlers split along the seams that already
work in the flat-sibling pattern established by lambdas/shared/, so
bare-name imports keep working under the existing bundling glob.
PO (5-way split): handler.py keeps only the event loop, fail-closed
auth, and email_type routing. extraction.py holds extract_with_claude
and _EMAIL_TAG_RE, importing EXTRACTION_PROMPT from prompts.py and
parse_raw_email from shared/email_parsing.py rather than recreating a
PO-local copy. enrichment.py is a pure code move of enrich_parsed and
pad_zip (PO-only; WO has no enrichment stage) with zero behavior
change. telemetry.py holds the EMF ParseMethod emit wrappers.
persistence.py holds _write_fields/_merge_update/save_*, collapsing
the byte-identical save_new_po/save_revision bodies into one
_save_merge helper that both now call through, preserving the sticky
Cancelled ConditionExpression guard for both callers; save_cancellation
stays separate.
WO (5 concerns, no enrichment stage): the handler loop keeps
validate_ai_fallback and the re.fullmatch(r"[0-9]+", work_order_id)
key guard ahead of both save_work_order and save_event, since the
guard protects the DynamoDB partition key and the '#'-delimited
comment_id range-key segment. _header_date_iso and comment_id
determinism stay colocated with persistence.py's save_event for the
retry-idempotent event_id key.
EXTRACTION_PROMPT (PO) moves to prompts.py with cross-reference
headers to derived_fields.py's authoritative trade/site/fiscal rule
tables; handler.py re-exports it (from prompts import
EXTRACTION_PROMPT) since four tests dereference handler.EXTRACTION_
PROMPT directly. WO's prompt moves the same way.
I/O modules (extraction.py's bedrock client, persistence.py's
dynamodb resource, handler.py's s3 client) get lazy cached boto3
accessors; pure modules (enrichment.py, prompts.py, telemetry.py)
import no boto3. Test monkeypatch surfaces move to the module that
now owns the client (e.g. persistence.dynamodb) everywhere tests
patch it, and the moto-before-handler-import ordering in
_po_parser_support.py is preserved so the moto-backed suites don't
hit real AWS.
Behavior-preservation pins, verified with tests: PO still emits
ParseMethod=ai_fallback before the Bedrock call, with
ai_fallback_rejected as the additive second datapoint on rejection.
WO still emits after its gate with mutually-exclusive ai_fallback /
ai_fallback_rejected. Shadow DerivedFieldAgreement telemetry stays
ai_fallback-only. derived_fields.py is untouched (diff against
feature/phase-3-shared-extraction is empty). handler(event, context)
signatures and the save_* public contract are unchanged on both
pipelines; goldens unchanged.
PO_EXPECTED_TOP_LEVEL_MODULES and its WO equivalent in
tests/test_bundle_consistency.py are updated for the new sibling
modules so the AST bundle-consistency test still fails on an
unshipped or uncommented-out sibling.
2026-07-20 15:34:53 -04:00
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monkeypatch.setattr(po_persistence, "dynamodb", fake)
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feat: template-first PO parser with fail-closed gate and Bedrock fallback (#105)
* Add deterministic template parser for WO emails
The workorder-email-processor sends every one of ~22.9k emails/month to
an LLM, but ~93.6% are the plain-text "AMAZON UPDATE WO DETAILS" comment
template and ~6.4% the HTML "AMAZON assign Work Order" template. Parse
those two shapes deterministically, offline, so the AI call is reserved
for the long tail.
The module is pure (no boto3, no network). try_deterministic_parse
classifies by subject, extracts the shared contract fields, and returns
a result ONLY when it passes a strict fail-closed validation gate: exact
contract-key set, subject/id agreement, the literal "Work Order: <id>"
double space, per-type required fields, site-code shape, and a
label-bleed guard so a value that over-ran into the next field fails.
Any miss, drift, or extractor exception yields None so the caller falls
back to the AI extractor -- data is never corrupted, only the fallback
rate rises.
Refs: #23
* Migrate WO processor to Bedrock and fix comment_id collision
Switch the AI path from the Anthropic SDK to bedrock-runtime InvokeModel
on the inference profile us.anthropic.claude-haiku-4-5-20251001-v1:0
(BEDROCK_MODEL_ID env), so parsing no longer needs a provider API key or
Secrets Manager secret. The EXTRACTION_PROMPT and JSON contract are kept
byte-identical, so the AI-fallback output is unchanged. Try the new
deterministic template parser first and only call Bedrock on a
miss/invalid result.
Fix issue #23: the WorkOrderComments range key was
work_order_id#<comment_time>, so two emails on one WO with an identical
or absent comment time collided and overwrote each other. Derive a
12-hex suffix from the S3 object key alone -- deterministic, so an async
retry of the same object is byte-identical (idempotent) while distinct
emails get distinct keys -- and keep wall-clock now() out of the key
(literal 'nocomment' segment when comment_time is absent).
Also emit one CloudWatch EMF line per record (Seahaven/WorkorderIngest
ParseOutcome, dimensioned by ParseMethod/TemplateId) for parse-outcome
observability, replace the deprecated datetime.utcnow() with
datetime.now(timezone.utc), and drop the anthropic dependency.
Refs: #23
* Migrate PO processor to Bedrock
Switch the PO email processor's AI extraction from the Anthropic SDK to
bedrock-runtime InvokeModel on the inference profile
us.anthropic.claude-haiku-4-5-20251001-v1:0 (BEDROCK_MODEL_ID env), so
it no longer needs a provider API key or Secrets Manager secret. PO
parsing stays fully AI -- only the provider changes. The EXTRACTION_PROMPT
is kept byte-identical and the Bedrock text output is still decoded with
json.loads(..., parse_float=Decimal), which DynamoDB requires (it rejects
floats). Replace the deprecated datetime.utcnow() with
datetime.now(timezone.utc) and drop the anthropic dependency.
* Grant Bedrock IAM, drop Anthropic secrets, add fallback alarm
Both stacks moved their processors from the Anthropic API to the Bedrock
inference profile us.anthropic.claude-haiku-4-5-20251001-v1:0. Grant each
processor role bedrock:InvokeModel + bedrock:InvokeModelWithResponseStream
on BOTH the inference-profile ARN AND the per-region foundation-model
ARNs for us-east-1/us-east-2/us-west-2 (empty-account) -- the us.* profile
routes cross-region, so a profile-only grant AccessDenies at runtime.
Remove both anthropic-api-key Secret constructs, their grant_read, and
the ANTHROPIC_API_KEY_SECRET_ARN env; add BEDROCK_MODEL_ID. The secrets
had RemovalPolicy.RETAIN so they are orphaned, not deleted -- flagged in
the README for manual post-deploy deletion and key revocation.
Add the workorder-email-processor-template-fallback-rate alarm: a
FILL(0) + >=10-sample volume-floor MathExpression over the EMF
ParseOutcome metric (15-min periods) that pages when the AI-fallback
share exceeds 15% sustained, catching Hexagon template drift. ALARM-only
SnsAction to site-alerts, no OK action, NOT_BREACHING, matching the
existing stack idiom.
* Add offline WO parser test suite
Cover the deterministic parser with golden-file tests over 55 real
scrubbed .eml fixtures (both comment sub-shapes, username Submitted-By,
address present/absent, br+CRLF assign addresses), fail-closed
validation-gate rules, adversarial and prompt-injection cases that must
route to ai_fallback or parse without corrupting other fields, the issue
#23 comment_id idempotency invariants, and the Bedrock-fallback dispatch
plus EMF-metric emission with a mocked invoke_model.
Extend pytest.ini testpaths to discover the co-located suite, and update
tests/conftest.load_handler to put a handler's own directory on sys.path
so the WO handler's new `from template_parser import ...` resolves under
the existing shared handler tests. Point test_local.py at the new
template-first + Bedrock flow.
Refs: #23
* Document Bedrock migration and WO parse flow in README
Record the provider switch to the Bedrock inference profile (no Anthropic
API key or Secrets Manager secret, with the retired secrets flagged for
manual deletion), the WO deterministic-template-first + AI-fallback flow,
the new ParseOutcome EMF metric and template-fallback-rate alarm, the
issue #23 comment_id format change, the +00:00 aware-UTC timestamp shift,
and offline test instructions.
Refs: #23
* Fix f-string lint and formatting in backfill scripts
Drop the f prefix from two f-strings that carry no placeholders
(F541) and apply ruff format, so `ruff check` / `ruff format --check`
pass in CI.
* Emit ParseMethod-only EMF set so fallback alarm can fire
The fallback-rate alarm queries the ParseOutcome series keyed on
ParseMethod alone, but the emitter published only the joint
(ParseMethod, TemplateId) dimension set. CloudWatch materializes
exactly the listed dimension sets and does not auto-aggregate, so the
alarm's series never received data: it evaluated a constant 0 and
could never page on template-drift coverage collapse.
Publish both ["ParseMethod"] and ["ParseMethod","TemplateId"] and
update the EMF regression test to assert both sets are present.
* Commit WO parser .eml fixtures for executable coverage
The parser test suite globbed for input .eml fixtures that the repo's
`*.eml` ignore rule kept uncommitted, so every parametrized golden and
fail-closed test collected zero cases and CI could not exercise the
deterministic parser that handles 100% of WO email volume.
Add a fixtures-only negation to .gitignore and commit the 55 scrubbed
positive samples (50 update-plaintext, 5 assign-html) plus 14
ai-fallback and 3 adversarial fixtures. The ai-fallback set covers each
fail-closed reason code (subject_no_match, single_space_work_order,
malformed_site_code, label_bleed, creation_time_unparseable,
wo_id_mismatch, missing_required_field) and the adversarial set proves
the parser is total and confines prompt-injection payloads to
comment_text without steering the structured fields.
* feature: Add PO template parser scaffold and design doc
Mirror WO PR #99's template-first approach for the Coupa PO processor. Two templates identified from a full 3,448-email triage:
- coupa_new_po (95.5%): scaffolded; fails closed to the LLM until extract_new_po lands.
- coupa_cancellation (2.9%): implemented.
Nested contract with recursive validation, Decimal money, and a fail-closed gate. Derived fields (site_code/trade/fiscal_year) are deferred to a shared post-stage. Comments, revisions, multi-line, and non-USD emails fall back to Bedrock. docs/po-template-parser.md records the investigation, decisions, and remaining work.
Signed-off-by: Adam Moussa <166072409+amoussa1229@users.noreply.github.com>
* Implement PO new_po extraction and value-level gate
Replace the extract_new_po scaffold stub with the full
section-windowed extractor (duplicate-label anchoring, sentinel
ship-to, label-keyed U+2022 bullet split, Decimal money from three
anchored contexts only) and add value-level gate rules V1-V13.
Both new_po_not_implemented scaffold guards are removed; rules 6-8
(unrecognized_status, multiline_unsupported, non_usd) go live.
The gate re-derives every byte proof from the email body so an
extractor bug cannot vouch for itself: amount re-serialization
with a digit/comma border check (the thousands-separator
truncation kill switch), sum(lines)==total against both Total
blocks, anchor/supplier identity proofs, USPS address shape on
the raw pre-enrichment zip, bullet label discipline, and
sentinel/artifact hygiene. Any failure falls closed to the LLM;
a validation failure is never a parsed result.
Refs: #99
* Wire template-first parse into PO handler with EMF metric
Run try_deterministic_parse ahead of the Bedrock extractor and
fall back only on a miss/invalid (fail-closed) result. The shared
enrich_parsed post-stage and the save_cancellation/save_revision/
save_new_po routing are untouched, so both paths write identical
DynamoDB shapes and the po-ingest-site-extractor stream contract
is preserved.
Each record emits one ParseMethod EMF line (Seahaven/PoIngest/
ParseOutcome, dimension sets [ParseMethod] and
[ParseMethod,TemplateId], ReasonCode/po_number ride-alongs)
mirroring the WO idiom. The metric fires before the Bedrock call
so a Bedrock-side error still records the ai_fallback outcome.
Refs: #99
* Add PO fallback-rate alarm retuned for ~57 emails/day
The WO alarm's 15-min period and >=10-sample floor assume
~760/day and would be structurally dead at PO volume (a 15-min
period holds ~0.6 emails, so the floor is never met). Retune:
6-hour periods (~14.25 expected emails), IF((fb+tmpl)>=8,...)
volume floor so a single email can never breach a datapoint
(1/8 = 12.5% < 20%), threshold >20% against a ~1% expected
baseline, eval 4 / datapoints 2 (24h span) so noise self-clears
while total template drift pages within ~12h. No element-wise
MAX in the math expression (post-#102 rule); ALARM-only
SnsAction to site-alerts, NOT_BREACHING. Gated with
'npx cdk synth po-ingest'.
Also add template_parser.py to the bundling cp list -- without it
every deployed invocation would ImportError (unit tests cannot
catch an asset-bundling omission).
Refs: #99, #102
* Add offline PO parser suite with scrubbed fixture corpus
132 tests: golden-file comparison for all 25 positive fixtures
(17 single-line new-PO + 8 cancellations, Decimal-exact via
parse_float=Decimal), every fail-closed gate reason code covered
(body-level triggers via 17 synthetic adversarial .eml mutations,
candidate-level via direct validate() unit tests), real multi-line
and comment/non-Coupa fallback fixtures, dual line-ending parse
identity, two-path enrich/save parity (site-extractor stream
guard), V10 URL-id corpus sweep, fixture hygiene (ses_auth pass +
scrub-marker leak sweep), and Bedrock dispatch/EMF assertions.
The suite loads handler/template_parser via importlib under
unique module names and binds the handler's bare sibling imports
around exec (tests/conftest.py load_handler gets the same
treatment) -- the WO suite caches bare 'handler'/'template_parser'
names in sys.modules, and bare imports here would silently bind
to the wrong pipeline. moto is imported before the handler so its
botocore stubber hook precedes boto3 session creation (the PO
conftest chain now loads at pytest session start).
Fixtures are scrubbed real S3 samples: transport/auth header
values replaced with same-shape placeholders (structure kept so
ses_auth still passes), per-file digit ciphers, amounts remapped
with sum==total re-established. The .gitignore exception is
scoped to the PO fixtures path only.
Refs: #99
* Document PO template-first parser and retuned alarm
README: PO flow is now template-first with Bedrock fallback;
parser/gate section mirroring the WO writeup; Seahaven/PoIngest
ParseOutcome namespace and the fallback-rate alarm numbers with
their volume justification (deliberately not WO's settings);
test-suite and repo-layout updates.
Design doc: mark PR #1 complete in progress/checklist sections;
document the six value-level gate reason codes and the scaffold
guard removal; correct the stale data-access note (default CLI
session is 328440206208) and note the ~90-day S3 lifecycle aging
of the corpus; record the 2.3 layout addendum (leading Supplier
bullet segment, EA evidence lines, summary unit-price tokens,
decode-path line endings), the fixture-build pins (address join
convention, quantity/unit/price source), the V10 sweep outcome,
and resolutions for open questions Q3/Q6. Cross-family review and
the Confluence architecture-map update are flagged outstanding
for merge.
Refs: #99
* Record cross-family review outcome for handler wiring
GPT-4.1 cross_review.py run against the real handler diff
returned no BLOCK and no security findings; both FIX items
verified as no-change-needed (fallback logging already correct;
non-dict AI output is the pre-existing issue #101 pattern this
PR deliberately does not touch).
Refs: #99
* Pin line-item currency to USD in the PO gate
The non_usd rule only checked the Total-block top-level currency, so a
new_po whose line item read 'for 55,206.00 CAD' under a USD Total block
still template-parsed as ok -- a fail-open hole in the fail-closed
gate. Every line item's captured currency and its re-derived body token
must now byte-equal the proven-USD top-level currency; covered by a
line-level CAD adversarial fixture (the existing adv-non-usd only
exercised the Total-block variant) and a candidate-mutation unit test.
* Scrub residual transport tokens from PO fixtures
The first-pass harvest scrub sanitized only the primary SES/DKIM
header blocks, leaving the real SES Feedback-ID sender-identity hash
in 49 committed fixtures and, on the two non-Coupa fixtures, an
embedded second SES block's X-Ses-Receipt, the Exchange cross-tenant
UPN ciphertext, and Gmail ARC fh= / X-Gm-* tokens -- exactly the
token classes the PR #99 fixture lesson requires placeholdered.
Replace each with a same-shape ScrubbedFixture value (byte-safe,
CRLF and folding preserved) so header structure and ses_auth
behavior are unchanged.
* Converge quantity/price to Decimal on both paths
EXTRACTION_PROMPT declares quantity and price as JSON strings, so a
prompt-obedient Bedrock response stores DynamoDB Strings where the
template parser stores Numbers -- divergent attribute types for the
same email on the purchase-orders stream. Coerce numeric strings to
Decimal in the shared enrich_parsed post-stage (thousands-separator
safe; non-numeric strings kept verbatim) so both paths converge;
prompt rewording itself remains PR #2 scope.
The two-path parity test was circular -- it replayed the parser-
derived golden as 'the LLM output', so it could never see the type
divergence. It now feeds a prompt-shaped payload (string quantity/
price, LLM-filled site_code) through enrich_parsed and save_new_po,
and the fixture-hygiene test now asserts the scrubbed transport-token
header classes so fixture regressions are caught.
* Coerce bare-int quantity/price to Decimal in enrich_parsed
GPT-4.1 cross-family review of the final PR diff (no BLOCK) flagged
residual type drift: parse_float=Decimal rules out floats on the LLM
path, but a bare JSON int survived as Python int. Coerce it so both
parse paths emit one canonical Decimal type.
* Scrub fixture-body PII and harden cancellation gate (sec review)
/sh-security-review of PR #105 (5 fresh-context detectors + proof-or-kill
verifier) confirmed two diff-introduced findings; both fixed here.
F3 (medium, real PII in new fixtures): the harvest scrub replaced header
tokens but left real third-party PII in message BODIES -- an Amazon
contact's name/phone/personal email in non-coupa-02.eml and an internal
t.corp.amazon.com ticket URL in comment-02.eml, plus real submitter/attn
names recurring across the new_po corpus. Replaced every personal name,
phone, personal email, and internal URL with synthetic placeholders
(QP-soft-wrap aware) across both .eml bodies and expected goldens.
Extended test_fixture_hygiene to scan BODIES (phone shapes, corp URLs,
the leaked tokens), closing the header-only gap that let this through.
F1 (medium, cancellation gate): _CANCELLATION_SUBJECT was unanchored and
matched with .search(), unlike the anchored new_po pattern -- a subject
merely ending with the cancellation phrase could be routed to the sticky-
Cancelled write. Fully anchored it and switched to .match, and added a
body-corroboration gate (the real Coupa body independently restates
'Purchase Order #<po> ... has been cancelled'); a near-miss/misrouted
subject whose body does not corroborate now fails closed to the LLM
(new reason code cancellation_body_unconfirmed).
Pre-existing (advisory, not this PR): the LLM-fallback else->save_new_po
dispatch and undelimited extraction prompt (issue #101 family) are
byte-identical to main and unchanged here.
401 tests pass; ruff/format clean; cdk synth po-ingest clean.
---------
Signed-off-by: Adam Moussa <166072409+amoussa1229@users.noreply.github.com>
2026-07-16 17:50:59 -04:00
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return fake
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