Add three synthesized Friendship PCS responses with ground truth

Covers all nine stress cases from #25, #15 and #16. The lowest bid is
disqualified on two missing health documents and the highest bid is
strongest on the SFA's own geographic-preference criterion, so a ranking
that cannot represent absence gets the field exactly backwards.

Deliberate traps: a planted $400 arithmetic error in a stated total, an
unverifiable total whose unit price lives only in the external Excel, an
unlabelled exception, a non-priceable exception that is really a conditional
withdrawal, and an answered-but-negative response.

Second schema finding, surfaced by the validator: R-B6C is a mandatory gate
that no response document can establish. Coverage over it is unknowable
rather than absent.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

corpus/friendship-pcs/responses/source/potomac-provisions.md

@@ -0,0 +1,170 @@
+# POTOMAC PROVISIONS LLC
+### Response to Friendship Public Charter School
+### RFP for the Supply and Delivery of Food Items, SY 2021–2022
+
+8600 Ardwick-Ardmore Road, Landover, MD 20785 · (301) 555-0142
+Contact: Denise Whitaker, Director of Education Accounts
+
+---
+
+## SECTION ONE — EXECUTIVE SUMMARY
+
+Potomac Provisions has distributed to School Food Authorities in the
+Washington metropolitan area since 1994. We currently serve 41 SFAs across
+DC, Maryland and Northern Virginia, including 11 public charter networks,
+and deliver approximately 2.3 million cases annually from a single
+GFSI-certified warehouse in Landover.
+
+### Compliance Matrix
+
+Per Section A.2, every required item is enumerated below with the page of
+this response on which it appears.
+
+| RFP Ref | Requirement | Status | Page |
+|---|---|---|---|
+| A.1 | Cover Page | Complete, signed | 1 |
+| A.2 | Bidder Checklist | Complete | 2 |
+| B.2 | Certification of percentage of local foods | Complete — 18% certified | 3 |
+| B.6(c) | Two bid copies | Provided | — |
+| B.6(d) | Current state or local health certificate | Attached, Prince George's County, exp. 2022-03-31 | A-1 |
+| B.7 | Four-section format | This document | — |
+| B.8 | Distributor Pre-Qualification Questionnaire | Complete | 4 |
+| B.8 | Business license | Attached, MD SDAT D14882910 | A-2 |
+| B.8 | Certificate of Occupancy | Attached | A-3 |
+| B.8 | Two years audited financial statements | Attached, FY2019 & FY2020 | A-4 |
+| C.1 | Response to values statement | Section Four | 7 |
+| C.5 | Two most recent health inspections | Attached, 2020-11-04 and 2021-02-17, both passed | A-5 |
+| D.6 | Insurance amounts | Certificate attached, $2M/$4M | A-6 |
+| Schedule C | Pricing Sheet | Submitted in Excel as instructed | — |
+| Att. A | Healthy Schools Act requirements | Acknowledged, Section Three | 5 |
+| Att. B | Debarment & Suspension | Signed | A-7 |
+| Att. C | Independent Price Determination | Signed | A-8 |
+| Att. D | Certification Regarding Lobbying | Signed | A-9 |
+| E.1 | Equal Opportunity | Signed | A-10 |
+| E.3 | Clean Air and Water Certification | Signed | A-11 |
+
+No exceptions are taken to any term or condition of this solicitation.
+
+---
+
+## SECTION TWO — PRICING
+
+Pricing is submitted on Schedule C in the Excel workbook provided, as
+instructed. The structure is summarised here for the evaluation committee.
+
+**Rate structure: volume-banded unit pricing.** Unit price per case falls as
+aggregate annual volume across all eight sites rises. Bands are measured on
+total cases invoiced in the contract year and applied retroactively at
+year end as a rebate.
+
+| Annual case volume | Discount from list | Illustrative delivered case price, mixed produce |
+|---|---|---|
+| 0 – 11,999 cases | list | $28.40 |
+| 12,000 – 23,999 cases | 3.0% | $27.55 |
+| 24,000 – 35,999 cases | 5.5% | $26.84 |
+| 36,000+ cases | 7.5% | $26.27 |
+
+Delivered price includes freight to all eight sites within the delivery
+windows in Schedule A. There is no separate fuel surcharge and no minimum
+order charge.
+
+**Base year total bid cost, at FPCS's stated estimated volume of 21,400
+cases: $589,970.**
+
+Prices are firm for the base year. Economic price adjustment is requested
+only as permitted under D.8, on the published PPI for the relevant
+commodity group, and only at contract anniversary.
+
+---
+
+## SECTION THREE — METHOD OF APPROACH AND IMPLEMENTATION PLAN
+
+### Food and packaging
+
+All produce is packed to USDA No. 1 or better. Case configurations follow
+the SFA's existing pack sizes so that no menu re-costing is required at
+transition. Product acceptance issues are credited on the delivery ticket
+at the point of receipt; the driver is authorised to credit without a
+return authorisation.
+
+CN labels and product formulation statements are supplied through our
+online portal, which exposes a per-item document library. Every catalogue
+item carries its CN label, nutrient analysis and allergen statement, and
+these are downloadable in bulk as a single PDF per menu cycle. This is how
+we make nutritional information available to the SFA as required in B.7.
+
+### Utilization of USDA Foods
+
+We are an approved processor-distributor for USDA Foods in both Maryland
+and the District. We manage entitlement drawdown, diversion and pass-through
+value directly, and provide a monthly entitlement position statement.
+For SY2020–21 we processed 340,000 lbs of USDA-donated commodity on behalf
+of DC-area SFAs.
+
+### Geographic preference
+
+Eighteen percent (18%) of the product value we propose to supply to FPCS
+will be locally grown or raised, defined as originating within 250 miles
+of Washington, DC. Certification of this percentage is provided under B.2.
+We accept the SFA's right to audit the actual percentage once awarded.
+
+We are candid that 18% is a function of our scale and our year-round
+service commitment: we will not substitute a local item where continuity
+of supply cannot be guaranteed across the full school year.
+
+### Healthy Schools Act
+
+We have supplied DC SFAs under HSA requirements since 2010 and are familiar
+with the local meal reimbursement conditions in Attachment A, including the
+whole-grain-rich and local-sourcing provisions.
+
+---
+
+## SECTION FOUR — BIDDER'S EXPERIENCE, EXPERTISE AND RELIABILITY
+
+### Knowledge of USDA and District requirements
+
+Our education accounts team includes two staff who previously worked in
+SFA operations. We complete DC OSSE reporting alongside our SFA customers
+each year.
+
+### Dependability
+
+Our on-time delivery rate across all SFA accounts for SY2020–21 was 98.6%,
+measured against contracted delivery windows. Order fill accuracy was
+99.2% by line. Both figures are drawn from our WMS and can be audited.
+
+### Warehouse and facilities
+
+Our Landover facility is GFSI-certified under SQF Level 2. The two most
+recent health inspections, both passed with no critical violations, are
+attached under C.5. Our stored products pest management programme is
+operated under contract by a licensed applicator with monthly service and
+quarterly third-party audit, per C.6.
+
+### Customer service
+
+Each SFA has a named account manager and a named backup. Orders may be
+placed through the portal or by phone until 2:00 PM for next-day delivery.
+Credits are issued within one business day.
+
+### Proven organizational capacity
+
+Twenty-seven years in operation. 2.3 million cases annually. We have run
+eight-site or larger charter networks continuously since 2011, and our
+audited financials for FY2019 and FY2020 are attached.
+
+### Response to values statement (C.1)
+
+FPCS's stated commitment to student nutrition as a driver of educational
+outcomes matches how we run our education accounts. We staff them
+separately from our commercial business precisely because the buying
+calendar, the compliance burden and the tolerance for substitution are
+different. We are interested in this business because eight sites under one
+authority is the scale at which menu consistency actually becomes
+achievable.
+
+### References
+
+Three SFA references are provided in the Pre-Qualification Questionnaire,
+all DC or Prince George's County charter networks of comparable size.