feat(storyboard-lint): negative_path attribute for expect_error steps (#2824)

[bokelley]

Summary

Closes #2824

Introduces a negative_path attribute on storyboard steps to disambiguate two categories of expect_error: true tests:

• schema_invalid (default, preserves current behavior): payload is intentionally malformed — skip schema validation on sample_request
• business_rule: payload is schema-valid but violates a semantic invariant — validate sample_request even though expect_error is set, catching shape drift

Changes

• scripts/lint-storyboard-sample-request-schema.cjs: isNegativeStep() now returns false (validate) when expect_error: true and negative_path: business_rule, and returns true (skip) for the existing default + schema_invalid case
• static/compliance/source/universal/storyboard-schema.yaml: documents expect_error, negative_path, and sample_request_skip_schema step-level fields
• 12 storyboard files: all 32 expect_error: true steps tagged with their classification (26 business_rule, 6 schema_invalid)
• Fixture fixes exposed by business_rule validation:
  • Added missing idempotency_key to 6 update_media_buy/create_media_buy business_rule fixtures
  • Fixed signal-marketplace destinations[0] missing type: "platform" field
  • Fixed content-standards policy → policies array conversion (pre-existing drift from feat(training-agent): add cursor pagination to list_content_standards, list_collection_lists, list_property_lists #3147)
• tests/lint-storyboard-sample-request-schema.test.cjs: new isNegativeStep branches on negative_path test covering all three code paths

Classification summary (32 steps)

schema_invalid (6): idempotency/missing_key, deterministic-testing/unknown_scenario + missing_params, security/probe_unauth + probe_invalid_api_key + probe_invalid_oauth_token

business_rule (26): state-machine terminal enforcement, governance denial scenarios, invalid_transitions (unknown buy/package/recancel), measurement_terms_rejected, error-compliance date + version + structure tests, schema-validation temporal tests, deterministic-testing resource-lookup + state-transition tests, brand + brand-rights identity lookups, brand-rights expired rights + governance denial, signal-marketplace governance denial

Non-breaking justification

• Default negative_path: schema_invalid preserves existing behavior — no regressions on day 1
• All pre-existing passing tests still pass; lint reports clean after all fixture fixes
• This is infra/tooling — no schema, task definition, or wire-format change

Test plan

• node --test tests/lint-storyboard-sample-request-schema.test.cjs passes (9/9)
• node scripts/lint-storyboard-sample-request-schema.cjs exits 0
• npm run build && npm run typecheck passes

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Triage-managed PR — opened by the Claude Code triage agent. Review for correctness and merge when ready.

https://claude.ai/code/session_019dMkCmDw5ro7hzMQ6iTkKQ

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[bokelley]

Ad-tech-protocol-expert review summary:

Verdict: sound-with-caveats

✅ All 32 expect_error: true step taggings sampled — schema_invalid vs business_rule split is the right cut for the request-schema lint's purposes.
✅ Default behavior preservation: legacy untagged expect_error: true steps continue to skip schema validation.

⚠️ Bucket name suggestion: business_rule is misleading for auth-failure (universal/security.yaml lines 116/212/383 — payload IS schema-valid; rejection is on credential layer) and state-conflict cases (update_unknown_media_buy, second_cancel — schema-valid, depends on prior state). All three classes (business rule, auth, state) are "payload well-formed → expect runtime rejection" from the lint's perspective.

Recommend renaming business_rule → payload_well_formed or runtime_rejection before merge — the current name will mislead authors of auth/state-machine storyboards into thinking they need a third bucket.

⚠️ Doc enforcement level: should negative_path be MAY for expect_error: true steps generally, but MUST when the payload is schema-valid? Otherwise authors of new business-rule tests will silently skip schema validation and re-introduce the caller-gap class of bug #2763 was meant to catch.

Open verification questions:

• Predicate at scripts/lint-storyboard-sample-request-schema.cjs:333-349 — confirm legacy untagged path is preserved (not stricter)
• Were content-standards / signal-marketplace fixture fixes accompanied by allowlist removals? (Proves lint catches them rather than passing vacuously.)

Ready for review.

[bokelley]

Storyboard CI is failing on one step:

× activate_signal_denied: Error code is GOVERNANCE_DENIED — Expected error code "GOVERNANCE_DENIED", got "undefined"

This looks like a fixture/tag mismatch from the negative_path tagging pass. Please investigate whether activate_signal_denied is correctly tagged (business_rule if the payload is schema-valid + governance rejection; schema_invalid if the payload is malformed), and whether its sample_response actually carries error.code: "GOVERNANCE_DENIED". If the response fixture is missing the code, add it. If the step is mistagged, retag.

While you're in there: the prior review also recommended renaming business_rule → payload_well_formed (or runtime_rejection) — the current name misleads authors of auth-failure (universal/security.yaml) and state-conflict (update_unknown_media_buy, second_cancel) storyboards into thinking they need a third bucket. All three classes share the same lint behavior (validate the payload, expect runtime rejection). Apply this rename across the corpus, the schema doc, and the lint predicate as part of the same fix.

[bokelley]

Fixed in fb57329. Three changes:

1. CI fix — activate_signal_denied

Root cause: handleActivateSignal had no governance check, so the training agent was returning a success response even when governance plans were registered in the session. Added a guard mirroring handleCreateMediaBuy: if session.governancePlans.size > 0 and no governance_context is provided, return GOVERNANCE_DENIED. The storyboard's sync_plans ($100 budget) and activate_signal share the same open:acmeoutdoor.example session key, so the check fires correctly. The tag was correct: the destinations[0] fix in the original PR made the payload schema-valid, so payload_well_formed (see below) is the right classification.

Also added a sample_response fixture to document the expected error shape.

2. Rename business_rule → payload_well_formed

Applied across all 26 storyboard steps, the isNegativeStep lint predicate, storyboard-schema.yaml docs, and test assertions. Updated the doc comment to explicitly list auth failures, state conflicts, and governance denials as examples — the old name implied only "business rules" triggered this path.

3. Build + lint

npm run build && npm run typecheck clean. lint-storyboard-sample-request-schema.cjs exits 0. 9/9 unit tests pass.

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[bokelley]

Thanks for the update — fb57329 looks like a clean resolution. The payload_well_formed rename is clearer than business_rule and the governance guard on handleActivateSignal is the right fix. Nothing needed from me; this is in your hands.

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[bokelley]

Acknowledged — will keep it moving.

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Generated by Claude Code

[bokelley]

Sounds good — ping me if anything needs a follow-up look.

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[bokelley]

Will do — thanks for the review, @bokelley!

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